* [PATCH] Remove 'target_mach' global from score-tdep.c @ 2022-03-15 22:31 Tom Tromey 2022-03-16 11:38 ` Andrew Burgess 2022-03-16 12:07 ` Pedro Alves 0 siblings, 2 replies; 7+ messages in thread From: Tom Tromey @ 2022-03-15 22:31 UTC (permalink / raw) To: gdb-patches; +Cc: Tom Tromey I randomly noticed that score-tdep.c sets a global variable from score_gdbarch_init, and then reuses this in other spots in the file. This seems incorrect to me, at least if multiple inferiors or targets are used; or potentially if there is a single gdb session that switches back and forth between (sub-)architectures, causing the global to be invalid. This patch fixes the problem by deferring the lookup. I wrote this just based on inspection, though, and have no way to test it. I wonder if other *-tdep.c files have similar issues. --- gdb/score-tdep.c | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-) diff --git a/gdb/score-tdep.c b/gdb/score-tdep.c index e20bee46df9..b5bc47ab694 100644 --- a/gdb/score-tdep.c +++ b/gdb/score-tdep.c @@ -53,13 +53,18 @@ struct score_frame_cache trad_frame_saved_reg *saved_regs; }; -static int target_mach = bfd_mach_score7; +/* Return the bfd_mach_* value for GDBARCH. */ +static int +target_mach (struct gdbarch *gdbarch) +{ + return gdbarch_bfd_arch_info (gdbarch)->mach; +} static struct type * score_register_type (struct gdbarch *gdbarch, int regnum) { gdb_assert (regnum >= 0 - && regnum < ((target_mach == bfd_mach_score7) + && regnum < ((target_mach (gdbarch) == bfd_mach_score7) ? SCORE7_NUM_REGS : SCORE3_NUM_REGS)); return builtin_type (gdbarch)->builtin_uint32; } @@ -108,7 +113,7 @@ static int score_register_sim_regno (struct gdbarch *gdbarch, int regnum) { gdb_assert (regnum >= 0 - && regnum < ((target_mach == bfd_mach_score7) + && regnum < ((target_mach (gdbarch) == bfd_mach_score7) ? SCORE7_NUM_REGS : SCORE3_NUM_REGS)); return regnum; } @@ -388,7 +393,7 @@ score_adjust_breakpoint_address (struct gdbarch *gdbarch, CORE_ADDR bpaddr) { CORE_ADDR adjust_pc = bpaddr; - if (target_mach == bfd_mach_score3) + if (target_mach (gdbarch) == bfd_mach_score3) score3_adjust_pc_and_fetch_inst (&adjust_pc, NULL, gdbarch_byte_order (gdbarch)); else @@ -404,13 +409,14 @@ score_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) } static void -score_xfer_register (struct regcache *regcache, int regnum, int length, +score_xfer_register (struct gdbarch *gdbarch, + struct regcache *regcache, int regnum, int length, enum bfd_endian endian, gdb_byte *readbuf, const gdb_byte *writebuf, int buf_offset) { int reg_offset = 0; gdb_assert (regnum >= 0 - && regnum < ((target_mach == bfd_mach_score7) + && regnum < ((target_mach (gdbarch) == bfd_mach_score7) ? SCORE7_NUM_REGS : SCORE3_NUM_REGS)); switch (endian) @@ -458,7 +464,7 @@ score_return_value (struct gdbarch *gdbarch, struct value *function, if (offset + xfer > TYPE_LENGTH (type)) xfer = TYPE_LENGTH (type) - offset; - score_xfer_register (regcache, regnum, xfer, + score_xfer_register (gdbarch, regcache, regnum, xfer, gdbarch_byte_order(gdbarch), readbuf, writebuf, offset); } @@ -1317,7 +1323,8 @@ score_make_prologue_cache (struct frame_info *this_frame, void **this_cache) if (start_addr == 0) return cache; - if (target_mach == bfd_mach_score3) + struct gdbarch *gdbarch = get_frame_arch (this_frame); + if (target_mach (gdbarch) == bfd_mach_score3) score3_analyze_prologue (start_addr, pc, this_frame, (struct score_frame_cache *) *this_cache); else @@ -1447,7 +1454,6 @@ static struct gdbarch * score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) { struct gdbarch *gdbarch; - target_mach = info.bfd_arch_info->mach; arches = gdbarch_list_lookup_by_info (arches, &info); if (arches != NULL) @@ -1472,7 +1478,7 @@ score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_frame_align (gdbarch, score_frame_align); set_gdbarch_inner_than (gdbarch, core_addr_lessthan); - switch (target_mach) + switch (info.bfd_arch_info->mach) { case bfd_mach_score7: set_gdbarch_breakpoint_kind_from_pc (gdbarch, -- 2.34.1 ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] Remove 'target_mach' global from score-tdep.c 2022-03-15 22:31 [PATCH] Remove 'target_mach' global from score-tdep.c Tom Tromey @ 2022-03-16 11:38 ` Andrew Burgess 2022-03-16 12:07 ` Pedro Alves 1 sibling, 0 replies; 7+ messages in thread From: Andrew Burgess @ 2022-03-16 11:38 UTC (permalink / raw) To: Tom Tromey, gdb-patches; +Cc: Tom Tromey Tom Tromey <tom@tromey.com> writes: > I randomly noticed that score-tdep.c sets a global variable from > score_gdbarch_init, and then reuses this in other spots in the file. > > This seems incorrect to me, at least if multiple inferiors or targets > are used; or potentially if there is a single gdb session that > switches back and forth between (sub-)architectures, causing the > global to be invalid. > > This patch fixes the problem by deferring the lookup. > > I wrote this just based on inspection, though, and have no way to test > it. I wonder if other *-tdep.c files have similar issues. I know nothing about the score architecture, but just by inspection this change looks good to me. Thanks, Andrew > --- > gdb/score-tdep.c | 26 ++++++++++++++++---------- > 1 file changed, 16 insertions(+), 10 deletions(-) > > diff --git a/gdb/score-tdep.c b/gdb/score-tdep.c > index e20bee46df9..b5bc47ab694 100644 > --- a/gdb/score-tdep.c > +++ b/gdb/score-tdep.c > @@ -53,13 +53,18 @@ struct score_frame_cache > trad_frame_saved_reg *saved_regs; > }; > > -static int target_mach = bfd_mach_score7; > +/* Return the bfd_mach_* value for GDBARCH. */ > +static int > +target_mach (struct gdbarch *gdbarch) > +{ > + return gdbarch_bfd_arch_info (gdbarch)->mach; > +} > > static struct type * > score_register_type (struct gdbarch *gdbarch, int regnum) > { > gdb_assert (regnum >= 0 > - && regnum < ((target_mach == bfd_mach_score7) > + && regnum < ((target_mach (gdbarch) == bfd_mach_score7) > ? SCORE7_NUM_REGS : SCORE3_NUM_REGS)); > return builtin_type (gdbarch)->builtin_uint32; > } > @@ -108,7 +113,7 @@ static int > score_register_sim_regno (struct gdbarch *gdbarch, int regnum) > { > gdb_assert (regnum >= 0 > - && regnum < ((target_mach == bfd_mach_score7) > + && regnum < ((target_mach (gdbarch) == bfd_mach_score7) > ? SCORE7_NUM_REGS : SCORE3_NUM_REGS)); > return regnum; > } > @@ -388,7 +393,7 @@ score_adjust_breakpoint_address (struct gdbarch *gdbarch, CORE_ADDR bpaddr) > { > CORE_ADDR adjust_pc = bpaddr; > > - if (target_mach == bfd_mach_score3) > + if (target_mach (gdbarch) == bfd_mach_score3) > score3_adjust_pc_and_fetch_inst (&adjust_pc, NULL, > gdbarch_byte_order (gdbarch)); > else > @@ -404,13 +409,14 @@ score_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) > } > > static void > -score_xfer_register (struct regcache *regcache, int regnum, int length, > +score_xfer_register (struct gdbarch *gdbarch, > + struct regcache *regcache, int regnum, int length, > enum bfd_endian endian, gdb_byte *readbuf, > const gdb_byte *writebuf, int buf_offset) > { > int reg_offset = 0; > gdb_assert (regnum >= 0 > - && regnum < ((target_mach == bfd_mach_score7) > + && regnum < ((target_mach (gdbarch) == bfd_mach_score7) > ? SCORE7_NUM_REGS : SCORE3_NUM_REGS)); > > switch (endian) > @@ -458,7 +464,7 @@ score_return_value (struct gdbarch *gdbarch, struct value *function, > > if (offset + xfer > TYPE_LENGTH (type)) > xfer = TYPE_LENGTH (type) - offset; > - score_xfer_register (regcache, regnum, xfer, > + score_xfer_register (gdbarch, regcache, regnum, xfer, > gdbarch_byte_order(gdbarch), > readbuf, writebuf, offset); > } > @@ -1317,7 +1323,8 @@ score_make_prologue_cache (struct frame_info *this_frame, void **this_cache) > if (start_addr == 0) > return cache; > > - if (target_mach == bfd_mach_score3) > + struct gdbarch *gdbarch = get_frame_arch (this_frame); > + if (target_mach (gdbarch) == bfd_mach_score3) > score3_analyze_prologue (start_addr, pc, this_frame, > (struct score_frame_cache *) *this_cache); > else > @@ -1447,7 +1454,6 @@ static struct gdbarch * > score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) > { > struct gdbarch *gdbarch; > - target_mach = info.bfd_arch_info->mach; > > arches = gdbarch_list_lookup_by_info (arches, &info); > if (arches != NULL) > @@ -1472,7 +1478,7 @@ score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) > set_gdbarch_frame_align (gdbarch, score_frame_align); > set_gdbarch_inner_than (gdbarch, core_addr_lessthan); > > - switch (target_mach) > + switch (info.bfd_arch_info->mach) > { > case bfd_mach_score7: > set_gdbarch_breakpoint_kind_from_pc (gdbarch, > -- > 2.34.1 ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] Remove 'target_mach' global from score-tdep.c 2022-03-15 22:31 [PATCH] Remove 'target_mach' global from score-tdep.c Tom Tromey 2022-03-16 11:38 ` Andrew Burgess @ 2022-03-16 12:07 ` Pedro Alves 2022-03-16 14:44 ` [PATCH] gdb: Remove support for S+core Pedro Alves 1 sibling, 1 reply; 7+ messages in thread From: Pedro Alves @ 2022-03-16 12:07 UTC (permalink / raw) To: Tom Tromey, gdb-patches On 2022-03-15 22:31, Tom Tromey wrote: > I randomly noticed that score-tdep.c sets a global variable from > score_gdbarch_init, and then reuses this in other spots in the file. > > This seems incorrect to me, at least if multiple inferiors or targets > are used; or potentially if there is a single gdb session that > switches back and forth between (sub-)architectures, causing the > global to be invalid. > > This patch fixes the problem by deferring the lookup. > > I wrote this just based on inspection, though, and have no way to test > it. I wonder if other *-tdep.c files have similar issues. Looks fine. I think we should just drop the whole score port, though. See here, from 2014 (!): https://sourceware.org/pipermail/gdb/2014-October/044643.html Pedro Alves ^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH] gdb: Remove support for S+core 2022-03-16 12:07 ` Pedro Alves @ 2022-03-16 14:44 ` Pedro Alves 2022-03-16 15:55 ` Andrew Burgess ` (2 more replies) 0 siblings, 3 replies; 7+ messages in thread From: Pedro Alves @ 2022-03-16 14:44 UTC (permalink / raw) To: Tom Tromey, gdb-patches On 2022-03-16 12:07, Pedro Alves wrote: > On 2022-03-15 22:31, Tom Tromey wrote: >> I randomly noticed that score-tdep.c sets a global variable from >> score_gdbarch_init, and then reuses this in other spots in the file. >> >> This seems incorrect to me, at least if multiple inferiors or targets >> are used; or potentially if there is a single gdb session that >> switches back and forth between (sub-)architectures, causing the >> global to be invalid. >> >> This patch fixes the problem by deferring the lookup. >> >> I wrote this just based on inspection, though, and have no way to test >> it. I wonder if other *-tdep.c files have similar issues. > > > Looks fine. > > I think we should just drop the whole score port, though. See here, from 2014 (!): > > https://sourceware.org/pipermail/gdb/2014-October/044643.html Like so. Given this has been removed from GCC for so long, and we never heard of anyone using the port or file a bug report about it all these years, I think we can just go ahead and delete it without a deprecation period. From bf4cfab66a3a35b164de3c63b57e4a5a228f2ac5 Mon Sep 17 00:00:00 2001 From: Pedro Alves <pedro@palves.net> Date: Wed, 16 Mar 2022 13:39:17 +0000 Subject: [PATCH] gdb: Remove support for S+core GCC removed support for score back in 2014 already. Back then, we basically agreed about removing it from GDB too, but it ended up being forgotten. See: https://sourceware.org/pipermail/gdb/2014-October/044643.html Following through this time around. Change-Id: I5b25a1ff7bce7b150d6f90f4c34047fae4b1f8b4 --- gdb/Makefile.in | 3 - gdb/NEWS | 6 +- gdb/configure.tgt | 5 - gdb/score-tdep.c | 1527 --------------------------------------------- gdb/score-tdep.h | 50 -- 5 files changed, 5 insertions(+), 1586 deletions(-) delete mode 100644 gdb/score-tdep.c delete mode 100644 gdb/score-tdep.h diff --git a/gdb/Makefile.in b/gdb/Makefile.in index 9bca9b0c5bc..aecab41eeb8 100644 --- a/gdb/Makefile.in +++ b/gdb/Makefile.in @@ -837,7 +837,6 @@ ALL_TARGET_OBS = \ s12z-tdep.o \ s390-linux-tdep.o \ s390-tdep.o \ - score-tdep.o \ sh-linux-tdep.o \ sh-netbsd-tdep.o \ sh-tdep.o \ @@ -1426,7 +1425,6 @@ HFILES_NO_SRCDIR = \ run-on-main-thread.h \ s390-linux-tdep.h \ s390-tdep.h \ - score-tdep.h \ selftest-arch.h \ sentinel-frame.h \ ser-base.h \ @@ -2303,7 +2301,6 @@ ALLDEPFILES = \ s390-linux-nat.c \ s390-linux-tdep.c \ s390-tdep.c \ - score-tdep.c \ ser-go32.c \ ser-mingw.c \ ser-pipe.c \ diff --git a/gdb/NEWS b/gdb/NEWS index bfa6b635718..c609da7e6cf 100644 --- a/gdb/NEWS +++ b/gdb/NEWS @@ -174,7 +174,11 @@ info win * New targets -GNU/Linux/LoongArch loongarch*-*-linux* +GNU/Linux/LoongArch loongarch*-*-linux* + +* Removed targets + +S+core score-*-* * Python API diff --git a/gdb/configure.tgt b/gdb/configure.tgt index 65f3bf6387d..0705ccf32b8 100644 --- a/gdb/configure.tgt +++ b/gdb/configure.tgt @@ -550,11 +550,6 @@ rx-*-*) gdb_target_obs="rx-tdep.o" ;; -score-*-*) - # Target: S+core embedded system - gdb_target_obs="score-tdep.o" - ;; - sh*-*-linux*) # Target: GNU/Linux Super-H gdb_target_obs="sh-tdep.o sh-linux-tdep.o \ diff --git a/gdb/score-tdep.c b/gdb/score-tdep.c deleted file mode 100644 index e20bee46df9..00000000000 --- a/gdb/score-tdep.c +++ /dev/null @@ -1,1527 +0,0 @@ -/* Target-dependent code for the S+core architecture, for GDB, - the GNU Debugger. - - Copyright (C) 2006-2022 Free Software Foundation, Inc. - - Contributed by Qinwei (qinwei@sunnorth.com.cn) - Contributed by Ching-Peng Lin (cplin@sunplus.com) - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. */ - -#include "defs.h" -#include "inferior.h" -#include "symtab.h" -#include "objfiles.h" -#include "gdbcore.h" -#include "target.h" -#include "arch-utils.h" -#include "regcache.h" -#include "regset.h" -#include "dis-asm.h" -#include "frame-unwind.h" -#include "frame-base.h" -#include "trad-frame.h" -#include "dwarf2/frame.h" -#include "score-tdep.h" - -#define G_FLD(_i,_ms,_ls) \ - ((unsigned)((_i) << (31 - (_ms))) >> (31 - (_ms) + (_ls))) - -typedef struct{ - unsigned long long v; - unsigned long long raw; - unsigned int len; -}inst_t; - -struct score_frame_cache -{ - CORE_ADDR base; - CORE_ADDR fp; - trad_frame_saved_reg *saved_regs; -}; - -static int target_mach = bfd_mach_score7; - -static struct type * -score_register_type (struct gdbarch *gdbarch, int regnum) -{ - gdb_assert (regnum >= 0 - && regnum < ((target_mach == bfd_mach_score7) - ? SCORE7_NUM_REGS : SCORE3_NUM_REGS)); - return builtin_type (gdbarch)->builtin_uint32; -} - -static const char * -score7_register_name (struct gdbarch *gdbarch, int regnum) -{ - const char *score_register_names[] = { - "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", - "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", - "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", - "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", - - "PSR", "COND", "ECR", "EXCPVEC", "CCR", - "EPC", "EMA", "TLBLOCK", "TLBPT", "PEADDR", - "TLBRPT", "PEVN", "PECTX", "LIMPFN", "LDMPFN", - "PREV", "DREG", "PC", "DSAVE", "COUNTER", - "LDCR", "STCR", "CEH", "CEL", - }; - - gdb_assert (regnum >= 0 && regnum < SCORE7_NUM_REGS); - return score_register_names[regnum]; -} - -static const char * -score3_register_name (struct gdbarch *gdbarch, int regnum) -{ - const char *score_register_names[] = { - "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", - "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", - "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", - "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", - - "PSR", "COND", "ECR", "EXCPVEC", "CCR", - "EPC", "EMA", "PREV", "DREG", "DSAVE", - "COUNTER", "LDCR", "STCR", "CEH", "CEL", - "", "", "PC", - }; - - gdb_assert (regnum >= 0 && regnum < SCORE3_NUM_REGS); - return score_register_names[regnum]; -} - -#if WITH_SIM -static int -score_register_sim_regno (struct gdbarch *gdbarch, int regnum) -{ - gdb_assert (regnum >= 0 - && regnum < ((target_mach == bfd_mach_score7) - ? SCORE7_NUM_REGS : SCORE3_NUM_REGS)); - return regnum; -} -#endif - -static inst_t * -score7_fetch_inst (struct gdbarch *gdbarch, CORE_ADDR addr, gdb_byte *memblock) -{ - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); - static inst_t inst = { 0, 0, 0 }; - gdb_byte buf[SCORE_INSTLEN] = { 0 }; - int big; - int ret; - - if (target_has_execution () && memblock != NULL) - { - /* Fetch instruction from local MEMBLOCK. */ - memcpy (buf, memblock, SCORE_INSTLEN); - } - else - { - /* Fetch instruction from target. */ - ret = target_read_memory (addr & ~0x3, buf, SCORE_INSTLEN); - if (ret) - { - error (_("Error: target_read_memory in file:%s, line:%d!"), - __FILE__, __LINE__); - return 0; - } - } - - inst.raw = extract_unsigned_integer (buf, SCORE_INSTLEN, byte_order); - inst.len = (inst.raw & 0x80008000) ? 4 : 2; - inst.v = ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF); - big = (byte_order == BFD_ENDIAN_BIG); - if (inst.len == 2) - { - if (big ^ ((addr & 0x2) == 2)) - inst.v = G_FLD (inst.v, 29, 15); - else - inst.v = G_FLD (inst.v, 14, 0); - } - return &inst; -} - -static inst_t * -score3_adjust_pc_and_fetch_inst (CORE_ADDR *pcptr, int *lenptr, - enum bfd_endian byte_order) -{ - static inst_t inst = { 0, 0, 0 }; - - struct breakplace - { - int break_offset; - int inst_len; - }; - /* raw table 1 (column 2, 3, 4) - * 0 1 0 * # 2 - * 0 1 1 0 # 3 - 0 1 1 0 * # 6 - table 2 (column 1, 2, 3) - * 0 0 * * # 0, 4 - 0 1 0 * * # 2 - 1 1 0 * * # 6 - */ - - static const struct breakplace bk_table[16] = - { - /* table 1 */ - {0, 0}, - {0, 0}, - {0, 4}, - {0, 6}, - {0, 0}, - {0, 0}, - {-2, 6}, - {0, 0}, - /* table 2 */ - {0, 2}, - {0, 0}, - {-2, 4}, - {0, 0}, - {0, 2}, - {0, 0}, - {-4, 6}, - {0, 0} - }; - -#define EXTRACT_LEN 2 - CORE_ADDR adjust_pc = *pcptr & ~0x1; - gdb_byte buf[5][EXTRACT_LEN] = - { - {'\0', '\0'}, - {'\0', '\0'}, - {'\0', '\0'}, - {'\0', '\0'}, - {'\0', '\0'} - }; - int ret; - unsigned int raw; - unsigned int cbits = 0; - int bk_index; - int i, count; - - inst.v = 0; - inst.raw = 0; - inst.len = 0; - - adjust_pc -= 4; - for (i = 0; i < 5; i++) - { - ret = target_read_memory (adjust_pc + 2 * i, buf[i], EXTRACT_LEN); - if (ret != 0) - { - buf[i][0] = '\0'; - buf[i][1] = '\0'; - if (i == 2) - error (_("Error: target_read_memory in file:%s, line:%d!"), - __FILE__, __LINE__); - } - - raw = extract_unsigned_integer (buf[i], EXTRACT_LEN, byte_order); - cbits = (cbits << 1) | (raw >> 15); - } - adjust_pc += 4; - - if (cbits & 0x4) - { - /* table 1 */ - cbits = (cbits >> 1) & 0x7; - bk_index = cbits; - } - else - { - /* table 2 */ - cbits = (cbits >> 2) & 0x7; - bk_index = cbits + 8; - } - - gdb_assert (!((bk_table[bk_index].break_offset == 0) - && (bk_table[bk_index].inst_len == 0))); - - inst.len = bk_table[bk_index].inst_len; - - i = (bk_table[bk_index].break_offset + 4) / 2; - count = inst.len / 2; - for (; count > 0; i++, count--) - { - inst.raw = (inst.raw << 16) - | extract_unsigned_integer (buf[i], EXTRACT_LEN, byte_order); - } - - switch (inst.len) - { - case 2: - inst.v = inst.raw & 0x7FFF; - break; - case 4: - inst.v = ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF); - break; - case 6: - inst.v = ((inst.raw >> 32 & 0x7FFF) << 30) - | ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF); - break; - } - - if (pcptr) - *pcptr = adjust_pc + bk_table[bk_index].break_offset; - if (lenptr) - *lenptr = bk_table[bk_index].inst_len; - -#undef EXTRACT_LEN - - return &inst; -} - -/* Implement the breakpoint_kind_from_pc gdbarch method. */ - -static int -score7_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr) -{ - int ret; - unsigned int raw; - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); - gdb_byte buf[SCORE_INSTLEN] = { 0 }; - - if ((ret = target_read_memory (*pcptr & ~0x3, buf, SCORE_INSTLEN)) != 0) - { - error (_("Error: target_read_memory in file:%s, line:%d!"), - __FILE__, __LINE__); - } - raw = extract_unsigned_integer (buf, SCORE_INSTLEN, byte_order); - - if (!(raw & 0x80008000)) - { - /* 16bits instruction. */ - *pcptr &= ~0x1; - return 2; - } - else - { - /* 32bits instruction. */ - *pcptr &= ~0x3; - return 4; - } -} - -/* Implement the sw_breakpoint_from_kind gdbarch method. */ - -static const gdb_byte * -score7_sw_breakpoint_from_kind (struct gdbarch *gdbarch, int kind, int *size) -{ - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); - - *size = kind; - - if (kind == 4) - { - static gdb_byte big_breakpoint32[] = { 0x80, 0x00, 0x80, 0x06 }; - static gdb_byte little_breakpoint32[] = { 0x06, 0x80, 0x00, 0x80 }; - - if (byte_order == BFD_ENDIAN_BIG) - return big_breakpoint32; - else - return little_breakpoint32; - } - else - { - static gdb_byte big_breakpoint16[] = { 0x60, 0x02 }; - static gdb_byte little_breakpoint16[] = { 0x02, 0x60 }; - - if (byte_order == BFD_ENDIAN_BIG) - return big_breakpoint16; - else - return little_breakpoint16; - } -} - -/* Implement the breakpoint_kind_from_pc gdbarch method. */ - -static int -score3_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr) -{ - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); - int len; - - score3_adjust_pc_and_fetch_inst (pcptr, &len, byte_order); - - return len; -} - -/* Implement the sw_breakpoint_from_kind gdbarch method. */ - -static const gdb_byte * -score3_sw_breakpoint_from_kind (struct gdbarch *gdbarch, int kind, int *size) -{ - int index = 0; - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); - static gdb_byte score_break_insns[6][6] = { - /* The following three instructions are big endian. */ - { 0x00, 0x20 }, - { 0x80, 0x00, 0x00, 0x06 }, - { 0x80, 0x00, 0x80, 0x00, 0x00, 0x00 }, - /* The following three instructions are little endian. */ - { 0x20, 0x00 }, - { 0x00, 0x80, 0x06, 0x00 }, - { 0x00, 0x80, 0x00, 0x80, 0x00, 0x00 }}; - - *size = kind; - - index = ((byte_order == BFD_ENDIAN_BIG) ? 0 : 3) + (kind / 2 - 1); - return score_break_insns[index]; -} - -static CORE_ADDR -score_adjust_breakpoint_address (struct gdbarch *gdbarch, CORE_ADDR bpaddr) -{ - CORE_ADDR adjust_pc = bpaddr; - - if (target_mach == bfd_mach_score3) - score3_adjust_pc_and_fetch_inst (&adjust_pc, NULL, - gdbarch_byte_order (gdbarch)); - else - adjust_pc = align_down (adjust_pc, 2); - - return adjust_pc; -} - -static CORE_ADDR -score_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) -{ - return align_down (addr, 16); -} - -static void -score_xfer_register (struct regcache *regcache, int regnum, int length, - enum bfd_endian endian, gdb_byte *readbuf, - const gdb_byte *writebuf, int buf_offset) -{ - int reg_offset = 0; - gdb_assert (regnum >= 0 - && regnum < ((target_mach == bfd_mach_score7) - ? SCORE7_NUM_REGS : SCORE3_NUM_REGS)); - - switch (endian) - { - case BFD_ENDIAN_BIG: - reg_offset = SCORE_REGSIZE - length; - break; - case BFD_ENDIAN_LITTLE: - reg_offset = 0; - break; - case BFD_ENDIAN_UNKNOWN: - reg_offset = 0; - break; - default: - error (_("Error: score_xfer_register in file:%s, line:%d!"), - __FILE__, __LINE__); - } - - if (readbuf != NULL) - regcache->cooked_read_part (regnum, reg_offset, length, - readbuf + buf_offset); - if (writebuf != NULL) - regcache->cooked_write_part (regnum, reg_offset, length, - writebuf + buf_offset); -} - -static enum return_value_convention -score_return_value (struct gdbarch *gdbarch, struct value *function, - struct type *type, struct regcache *regcache, - gdb_byte * readbuf, const gdb_byte * writebuf) -{ - if (type->code () == TYPE_CODE_STRUCT - || type->code () == TYPE_CODE_UNION - || type->code () == TYPE_CODE_ARRAY) - return RETURN_VALUE_STRUCT_CONVENTION; - else - { - int offset; - int regnum; - for (offset = 0, regnum = SCORE_A0_REGNUM; - offset < TYPE_LENGTH (type); - offset += SCORE_REGSIZE, regnum++) - { - int xfer = SCORE_REGSIZE; - - if (offset + xfer > TYPE_LENGTH (type)) - xfer = TYPE_LENGTH (type) - offset; - score_xfer_register (regcache, regnum, xfer, - gdbarch_byte_order(gdbarch), - readbuf, writebuf, offset); - } - return RETURN_VALUE_REGISTER_CONVENTION; - } -} - -static int -score_type_needs_double_align (struct type *type) -{ - enum type_code typecode = type->code (); - - if ((typecode == TYPE_CODE_INT && TYPE_LENGTH (type) == 8) - || (typecode == TYPE_CODE_FLT && TYPE_LENGTH (type) == 8)) - return 1; - else if (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION) - { - int i, n; - - n = type->num_fields (); - for (i = 0; i < n; i++) - if (score_type_needs_double_align (type->field (i).type ())) - return 1; - return 0; - } - return 0; -} - -static CORE_ADDR -score_push_dummy_call (struct gdbarch *gdbarch, struct value *function, - struct regcache *regcache, CORE_ADDR bp_addr, - int nargs, struct value **args, CORE_ADDR sp, - function_call_return_method return_method, - CORE_ADDR struct_addr) -{ - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); - int argnum; - int argreg; - int arglen = 0; - CORE_ADDR stack_offset = 0; - CORE_ADDR addr = 0; - - /* Step 1, Save RA. */ - regcache_cooked_write_unsigned (regcache, SCORE_RA_REGNUM, bp_addr); - - /* Step 2, Make space on the stack for the args. */ - struct_addr = align_down (struct_addr, 16); - sp = align_down (sp, 16); - for (argnum = 0; argnum < nargs; argnum++) - arglen += align_up (TYPE_LENGTH (value_type (args[argnum])), - SCORE_REGSIZE); - sp -= align_up (arglen, 16); - - argreg = SCORE_BEGIN_ARG_REGNUM; - - /* Step 3, Check if struct return then save the struct address to - r4 and increase the stack_offset by 4. */ - if (return_method == return_method_struct) - { - regcache_cooked_write_unsigned (regcache, argreg++, struct_addr); - stack_offset += SCORE_REGSIZE; - } - - /* Step 4, Load arguments: - If arg length is too long (> 4 bytes), then split the arg and - save every parts. */ - for (argnum = 0; argnum < nargs; argnum++) - { - struct value *arg = args[argnum]; - struct type *arg_type = check_typedef (value_type (arg)); - enum type_code typecode = arg_type->code (); - const gdb_byte *val = value_contents (arg).data (); - int downward_offset = 0; - int arg_last_part_p = 0; - - arglen = TYPE_LENGTH (arg_type); - - /* If a arg should be aligned to 8 bytes (long long or double), - the value should be put to even register numbers. */ - if (score_type_needs_double_align (arg_type)) - { - if (argreg & 1) - argreg++; - } - - /* If sizeof a block < SCORE_REGSIZE, then Score GCC will chose - the default "downward"/"upward" method: - - Example: - - struct struc - { - char a; char b; char c; - } s = {'a', 'b', 'c'}; - - Big endian: s = {X, 'a', 'b', 'c'} - Little endian: s = {'a', 'b', 'c', X} - - Where X is a hole. */ - - if (gdbarch_byte_order(gdbarch) == BFD_ENDIAN_BIG - && (typecode == TYPE_CODE_STRUCT - || typecode == TYPE_CODE_UNION) - && argreg > SCORE_LAST_ARG_REGNUM - && arglen < SCORE_REGSIZE) - downward_offset += (SCORE_REGSIZE - arglen); - - while (arglen > 0) - { - int partial_len = arglen < SCORE_REGSIZE ? arglen : SCORE_REGSIZE; - ULONGEST regval = extract_unsigned_integer (val, partial_len, - byte_order); - - /* The last part of a arg should shift left when - gdbarch_byte_order is BFD_ENDIAN_BIG. */ - if (byte_order == BFD_ENDIAN_BIG - && arg_last_part_p == 1 - && (typecode == TYPE_CODE_STRUCT - || typecode == TYPE_CODE_UNION)) - regval <<= ((SCORE_REGSIZE - partial_len) * TARGET_CHAR_BIT); - - /* Always increase the stack_offset and save args to stack. */ - addr = sp + stack_offset + downward_offset; - write_memory (addr, val, partial_len); - - if (argreg <= SCORE_LAST_ARG_REGNUM) - { - regcache_cooked_write_unsigned (regcache, argreg++, regval); - if (arglen > SCORE_REGSIZE && arglen < SCORE_REGSIZE * 2) - arg_last_part_p = 1; - } - - val += partial_len; - arglen -= partial_len; - stack_offset += align_up (partial_len, SCORE_REGSIZE); - } - } - - /* Step 5, Save SP. */ - regcache_cooked_write_unsigned (regcache, SCORE_SP_REGNUM, sp); - - return sp; -} - -static CORE_ADDR -score7_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) -{ - CORE_ADDR cpc = pc; - int iscan = 32, stack_sub = 0; - while (iscan-- > 0) - { - inst_t *inst = score7_fetch_inst (gdbarch, cpc, NULL); - if (!inst) - break; - if ((inst->len == 4) && !stack_sub - && (G_FLD (inst->v, 29, 25) == 0x1 - && G_FLD (inst->v, 24, 20) == 0x0)) - { - /* addi r0, offset */ - stack_sub = cpc + SCORE_INSTLEN; - pc = cpc + SCORE_INSTLEN; - } - else if ((inst->len == 4) - && (G_FLD (inst->v, 29, 25) == 0x0) - && (G_FLD (inst->v, 24, 20) == 0x2) - && (G_FLD (inst->v, 19, 15) == 0x0) - && (G_FLD (inst->v, 14, 10) == 0xF) - && (G_FLD (inst->v, 9, 0) == 0x56)) - { - /* mv r2, r0 */ - pc = cpc + SCORE_INSTLEN; - break; - } - else if ((inst->len == 2) - && (G_FLD (inst->v, 14, 12) == 0x0) - && (G_FLD (inst->v, 11, 8) == 0x2) - && (G_FLD (inst->v, 7, 4) == 0x0) - && (G_FLD (inst->v, 3, 0) == 0x3)) - { - /* mv! r2, r0 */ - pc = cpc + SCORE16_INSTLEN; - break; - } - else if ((inst->len == 2) - && ((G_FLD (inst->v, 14, 12) == 3) /* j15 form */ - || (G_FLD (inst->v, 14, 12) == 4) /* b15 form */ - || (G_FLD (inst->v, 14, 12) == 0x0 - && G_FLD (inst->v, 3, 0) == 0x4))) /* br! */ - break; - else if ((inst->len == 4) - && ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */ - || (G_FLD (inst->v, 29, 25) == 4) /* b32 form */ - || (G_FLD (inst->v, 29, 25) == 0x0 - && G_FLD (inst->v, 6, 1) == 0x4))) /* br */ - break; - - cpc += (inst->len == 2) ? SCORE16_INSTLEN : SCORE_INSTLEN; - } - return pc; -} - -static CORE_ADDR -score3_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) -{ - CORE_ADDR cpc = pc; - int iscan = 32, stack_sub = 0; - while (iscan-- > 0) - { - inst_t *inst - = score3_adjust_pc_and_fetch_inst (&cpc, NULL, - gdbarch_byte_order (gdbarch)); - - if (!inst) - break; - if (inst->len == 4 && !stack_sub - && (G_FLD (inst->v, 29, 25) == 0x1) - && (G_FLD (inst->v, 19, 17) == 0x0) - && (G_FLD (inst->v, 24, 20) == 0x0)) - { - /* addi r0, offset */ - stack_sub = cpc + inst->len; - pc = cpc + inst->len; - } - else if (inst->len == 4 - && (G_FLD (inst->v, 29, 25) == 0x0) - && (G_FLD (inst->v, 24, 20) == 0x2) - && (G_FLD (inst->v, 19, 15) == 0x0) - && (G_FLD (inst->v, 14, 10) == 0xF) - && (G_FLD (inst->v, 9, 0) == 0x56)) - { - /* mv r2, r0 */ - pc = cpc + inst->len; - break; - } - else if ((inst->len == 2) - && (G_FLD (inst->v, 14, 10) == 0x10) - && (G_FLD (inst->v, 9, 5) == 0x2) - && (G_FLD (inst->v, 4, 0) == 0x0)) - { - /* mv! r2, r0 */ - pc = cpc + inst->len; - break; - } - else if (inst->len == 2 - && ((G_FLD (inst->v, 14, 12) == 3) /* b15 form */ - || (G_FLD (inst->v, 14, 12) == 0x0 - && G_FLD (inst->v, 11, 5) == 0x4))) /* br! */ - break; - else if (inst->len == 4 - && ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */ - || (G_FLD (inst->v, 29, 25) == 4))) /* b32 form */ - break; - - cpc += inst->len; - } - return pc; -} - -/* Implement the stack_frame_destroyed_p gdbarch method. */ - -static int -score7_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc) -{ - inst_t *inst = score7_fetch_inst (gdbarch, cur_pc, NULL); - - if (inst->v == 0x23) - return 1; /* mv! r0, r2 */ - else if (G_FLD (inst->v, 14, 12) == 0x2 - && G_FLD (inst->v, 3, 0) == 0xa) - return 1; /* pop! */ - else if (G_FLD (inst->v, 14, 12) == 0x0 - && G_FLD (inst->v, 7, 0) == 0x34) - return 1; /* br! r3 */ - else if (G_FLD (inst->v, 29, 15) == 0x2 - && G_FLD (inst->v, 6, 1) == 0x2b) - return 1; /* mv r0, r2 */ - else if (G_FLD (inst->v, 29, 25) == 0x0 - && G_FLD (inst->v, 6, 1) == 0x4 - && G_FLD (inst->v, 19, 15) == 0x3) - return 1; /* br r3 */ - else - return 0; -} - -/* Implement the stack_frame_destroyed_p gdbarch method. */ - -static int -score3_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc) -{ - CORE_ADDR pc = cur_pc; - inst_t *inst - = score3_adjust_pc_and_fetch_inst (&pc, NULL, - gdbarch_byte_order (gdbarch)); - - if (inst->len == 2 - && (G_FLD (inst->v, 14, 10) == 0x10) - && (G_FLD (inst->v, 9, 5) == 0x0) - && (G_FLD (inst->v, 4, 0) == 0x2)) - return 1; /* mv! r0, r2 */ - else if (inst->len == 4 - && (G_FLD (inst->v, 29, 25) == 0x0) - && (G_FLD (inst->v, 24, 20) == 0x2) - && (G_FLD (inst->v, 19, 15) == 0x0) - && (G_FLD (inst->v, 14, 10) == 0xF) - && (G_FLD (inst->v, 9, 0) == 0x56)) - return 1; /* mv r0, r2 */ - else if (inst->len == 2 - && (G_FLD (inst->v, 14, 12) == 0x0) - && (G_FLD (inst->v, 11, 5) == 0x2)) - return 1; /* pop! */ - else if (inst->len == 2 - && (G_FLD (inst->v, 14, 12) == 0x0) - && (G_FLD (inst->v, 11, 7) == 0x0) - && (G_FLD (inst->v, 6, 5) == 0x2)) - return 1; /* rpop! */ - else if (inst->len == 2 - && (G_FLD (inst->v, 14, 12) == 0x0) - && (G_FLD (inst->v, 11, 5) == 0x4) - && (G_FLD (inst->v, 4, 0) == 0x3)) - return 1; /* br! r3 */ - else if (inst->len == 4 - && (G_FLD (inst->v, 29, 25) == 0x0) - && (G_FLD (inst->v, 24, 20) == 0x0) - && (G_FLD (inst->v, 19, 15) == 0x3) - && (G_FLD (inst->v, 14, 10) == 0xF) - && (G_FLD (inst->v, 9, 0) == 0x8)) - return 1; /* br r3 */ - else - return 0; -} - -static gdb_byte * -score7_malloc_and_get_memblock (CORE_ADDR addr, CORE_ADDR size) -{ - int ret; - gdb_byte *memblock = NULL; - - if (size == 0) - return NULL; - - memblock = (gdb_byte *) xmalloc (size); - memset (memblock, 0, size); - ret = target_read_memory (addr & ~0x3, memblock, size); - if (ret) - { - error (_("Error: target_read_memory in file:%s, line:%d!"), - __FILE__, __LINE__); - return NULL; - } - return memblock; -} - -static void -score7_free_memblock (gdb_byte *memblock) -{ - xfree (memblock); -} - -static void -score7_adjust_memblock_ptr (gdb_byte **memblock, CORE_ADDR prev_pc, - CORE_ADDR cur_pc) -{ - if (prev_pc == -1) - { - /* First time call this function, do nothing. */ - } - else if (cur_pc - prev_pc == 2 && (cur_pc & 0x3) == 0) - { - /* First 16-bit instruction, then 32-bit instruction. */ - *memblock += SCORE_INSTLEN; - } - else if (cur_pc - prev_pc == 4) - { - /* Is 32-bit instruction, increase MEMBLOCK by 4. */ - *memblock += SCORE_INSTLEN; - } -} - -static void -score7_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc, - struct frame_info *this_frame, - struct score_frame_cache *this_cache) -{ - struct gdbarch *gdbarch = get_frame_arch (this_frame); - CORE_ADDR sp; - CORE_ADDR fp; - CORE_ADDR cur_pc = startaddr; - - int sp_offset = 0; - int ra_offset = 0; - int fp_offset = 0; - int ra_offset_p = 0; - int fp_offset_p = 0; - int inst_len = 0; - - gdb_byte *memblock = NULL; - gdb_byte *memblock_ptr = NULL; - CORE_ADDR prev_pc = -1; - - /* Allocate MEMBLOCK if PC - STARTADDR > 0. */ - memblock_ptr = memblock = - score7_malloc_and_get_memblock (startaddr, pc - startaddr); - - sp = get_frame_register_unsigned (this_frame, SCORE_SP_REGNUM); - fp = get_frame_register_unsigned (this_frame, SCORE_FP_REGNUM); - - for (; cur_pc < pc; prev_pc = cur_pc, cur_pc += inst_len) - { - inst_t *inst = NULL; - if (memblock != NULL) - { - /* Reading memory block from target successfully and got all - the instructions(from STARTADDR to PC) needed. */ - score7_adjust_memblock_ptr (&memblock, prev_pc, cur_pc); - inst = score7_fetch_inst (gdbarch, cur_pc, memblock); - } - else - { - /* Otherwise, we fetch 4 bytes from target, and GDB also - work correctly. */ - inst = score7_fetch_inst (gdbarch, cur_pc, NULL); - } - - /* FIXME: make a full-power prologue analyzer. */ - if (inst->len == 2) - { - inst_len = SCORE16_INSTLEN; - - if (G_FLD (inst->v, 14, 12) == 0x2 - && G_FLD (inst->v, 3, 0) == 0xe) - { - /* push! */ - sp_offset += 4; - - if (G_FLD (inst->v, 11, 7) == 0x6 - && ra_offset_p == 0) - { - /* push! r3, [r0] */ - ra_offset = sp_offset; - ra_offset_p = 1; - } - else if (G_FLD (inst->v, 11, 7) == 0x4 - && fp_offset_p == 0) - { - /* push! r2, [r0] */ - fp_offset = sp_offset; - fp_offset_p = 1; - } - } - else if (G_FLD (inst->v, 14, 12) == 0x2 - && G_FLD (inst->v, 3, 0) == 0xa) - { - /* pop! */ - sp_offset -= 4; - } - else if (G_FLD (inst->v, 14, 7) == 0xc1 - && G_FLD (inst->v, 2, 0) == 0x0) - { - /* subei! r0, n */ - sp_offset += (int) pow (2.0, G_FLD (inst->v, 6, 3)); - } - else if (G_FLD (inst->v, 14, 7) == 0xc0 - && G_FLD (inst->v, 2, 0) == 0x0) - { - /* addei! r0, n */ - /* Solaris 11+gcc 5.5 has ambiguous overloads of pow, so we - pass 2.0 instead of 2 to get the right one. */ - sp_offset -= (int) pow (2.0, G_FLD (inst->v, 6, 3)); - } - } - else - { - inst_len = SCORE_INSTLEN; - - if (G_FLD(inst->v, 29, 25) == 0x3 - && G_FLD(inst->v, 2, 0) == 0x4 - && G_FLD(inst->v, 19, 15) == 0) - { - /* sw rD, [r0, offset]+ */ - sp_offset += SCORE_INSTLEN; - - if (G_FLD(inst->v, 24, 20) == 0x3) - { - /* rD = r3 */ - if (ra_offset_p == 0) - { - ra_offset = sp_offset; - ra_offset_p = 1; - } - } - else if (G_FLD(inst->v, 24, 20) == 0x2) - { - /* rD = r2 */ - if (fp_offset_p == 0) - { - fp_offset = sp_offset; - fp_offset_p = 1; - } - } - } - else if (G_FLD(inst->v, 29, 25) == 0x14 - && G_FLD(inst->v, 19,15) == 0) - { - /* sw rD, [r0, offset] */ - if (G_FLD(inst->v, 24, 20) == 0x3) - { - /* rD = r3 */ - ra_offset = sp_offset - G_FLD(inst->v, 14, 0); - ra_offset_p = 1; - } - else if (G_FLD(inst->v, 24, 20) == 0x2) - { - /* rD = r2 */ - fp_offset = sp_offset - G_FLD(inst->v, 14, 0); - fp_offset_p = 1; - } - } - else if (G_FLD (inst->v, 29, 15) == 0x1c60 - && G_FLD (inst->v, 2, 0) == 0x0) - { - /* lw r3, [r0]+, 4 */ - sp_offset -= SCORE_INSTLEN; - ra_offset_p = 1; - } - else if (G_FLD (inst->v, 29, 15) == 0x1c40 - && G_FLD (inst->v, 2, 0) == 0x0) - { - /* lw r2, [r0]+, 4 */ - sp_offset -= SCORE_INSTLEN; - fp_offset_p = 1; - } - - else if (G_FLD (inst->v, 29, 17) == 0x100 - && G_FLD (inst->v, 0, 0) == 0x0) - { - /* addi r0, -offset */ - sp_offset += 65536 - G_FLD (inst->v, 16, 1); - } - else if (G_FLD (inst->v, 29, 17) == 0x110 - && G_FLD (inst->v, 0, 0) == 0x0) - { - /* addi r2, offset */ - if (pc - cur_pc > 4) - { - unsigned int save_v = inst->v; - inst_t *inst2 = - score7_fetch_inst (gdbarch, cur_pc + SCORE_INSTLEN, NULL); - if (inst2->v == 0x23) - { - /* mv! r0, r2 */ - sp_offset -= G_FLD (save_v, 16, 1); - } - } - } - } - } - - /* Save RA. */ - if (ra_offset_p == 1) - { - if (this_cache->saved_regs[SCORE_PC_REGNUM].is_realreg () - && this_cache->saved_regs[SCORE_PC_REGNUM].realreg () - == SCORE_PC_REGNUM) - this_cache->saved_regs[SCORE_PC_REGNUM].set_addr (sp + sp_offset - - ra_offset); - } - else - { - this_cache->saved_regs[SCORE_PC_REGNUM] = - this_cache->saved_regs[SCORE_RA_REGNUM]; - } - - /* Save FP. */ - if (fp_offset_p == 1) - { - if (this_cache->saved_regs[SCORE_FP_REGNUM].is_realreg () - && this_cache->saved_regs[SCORE_FP_REGNUM].realreg () - == SCORE_FP_REGNUM) - this_cache->saved_regs[SCORE_FP_REGNUM].set_addr (sp + sp_offset - - fp_offset); - } - - /* Save SP and FP. */ - this_cache->base = sp + sp_offset; - this_cache->fp = fp; - - /* Don't forget to free MEMBLOCK if we allocated it. */ - if (memblock_ptr != NULL) - score7_free_memblock (memblock_ptr); -} - -static void -score3_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc, - struct frame_info *this_frame, - struct score_frame_cache *this_cache) -{ - CORE_ADDR sp; - CORE_ADDR fp; - CORE_ADDR cur_pc = startaddr; - enum bfd_endian byte_order - = gdbarch_byte_order (get_frame_arch (this_frame)); - - int sp_offset = 0; - int ra_offset = 0; - int fp_offset = 0; - int ra_offset_p = 0; - int fp_offset_p = 0; - int inst_len = 0; - - sp = get_frame_register_unsigned (this_frame, SCORE_SP_REGNUM); - fp = get_frame_register_unsigned (this_frame, SCORE_FP_REGNUM); - - for (; cur_pc < pc; cur_pc += inst_len) - { - inst_t *inst = NULL; - - inst = score3_adjust_pc_and_fetch_inst (&cur_pc, &inst_len, byte_order); - - /* FIXME: make a full-power prologue analyzer. */ - if (inst->len == 2) - { - if (G_FLD (inst->v, 14, 12) == 0x0 - && G_FLD (inst->v, 11, 7) == 0x0 - && G_FLD (inst->v, 6, 5) == 0x3) - { - /* push! */ - sp_offset += 4; - - if (G_FLD (inst->v, 4, 0) == 0x3 - && ra_offset_p == 0) - { - /* push! r3, [r0] */ - ra_offset = sp_offset; - ra_offset_p = 1; - } - else if (G_FLD (inst->v, 4, 0) == 0x2 - && fp_offset_p == 0) - { - /* push! r2, [r0] */ - fp_offset = sp_offset; - fp_offset_p = 1; - } - } - else if (G_FLD (inst->v, 14, 12) == 0x6 - && G_FLD (inst->v, 11, 10) == 0x3) - { - /* rpush! */ - int start_r = G_FLD (inst->v, 9, 5); - int cnt = G_FLD (inst->v, 4, 0); - - if ((ra_offset_p == 0) - && (start_r <= SCORE_RA_REGNUM) - && (SCORE_RA_REGNUM < start_r + cnt)) - { - /* rpush! contains r3 */ - ra_offset_p = 1; - ra_offset = sp_offset + 4 * (SCORE_RA_REGNUM - start_r) + 4; - } - - if ((fp_offset_p == 0) - && (start_r <= SCORE_FP_REGNUM) - && (SCORE_FP_REGNUM < start_r + cnt)) - { - /* rpush! contains r2 */ - fp_offset_p = 1; - fp_offset = sp_offset + 4 * (SCORE_FP_REGNUM - start_r) + 4; - } - - sp_offset += 4 * cnt; - } - else if (G_FLD (inst->v, 14, 12) == 0x0 - && G_FLD (inst->v, 11, 7) == 0x0 - && G_FLD (inst->v, 6, 5) == 0x2) - { - /* pop! */ - sp_offset -= 4; - } - else if (G_FLD (inst->v, 14, 12) == 0x6 - && G_FLD (inst->v, 11, 10) == 0x2) - { - /* rpop! */ - sp_offset -= 4 * G_FLD (inst->v, 4, 0); - } - else if (G_FLD (inst->v, 14, 12) == 0x5 - && G_FLD (inst->v, 11, 10) == 0x3 - && G_FLD (inst->v, 9, 6) == 0x0) - { - /* addi! r0, -offset */ - int imm = G_FLD (inst->v, 5, 0); - if (imm >> 5) - imm = -(0x3F - imm + 1); - sp_offset -= imm; - } - else if (G_FLD (inst->v, 14, 12) == 0x5 - && G_FLD (inst->v, 11, 10) == 0x3 - && G_FLD (inst->v, 9, 6) == 0x2) - { - /* addi! r2, offset */ - if (pc - cur_pc >= 2) - { - inst_t *inst2; - - cur_pc += inst->len; - inst2 = score3_adjust_pc_and_fetch_inst (&cur_pc, NULL, - byte_order); - - if (inst2->len == 2 - && G_FLD (inst2->v, 14, 10) == 0x10 - && G_FLD (inst2->v, 9, 5) == 0x0 - && G_FLD (inst2->v, 4, 0) == 0x2) - { - /* mv! r0, r2 */ - int imm = G_FLD (inst->v, 5, 0); - if (imm >> 5) - imm = -(0x3F - imm + 1); - sp_offset -= imm; - } - } - } - } - else if (inst->len == 4) - { - if (G_FLD (inst->v, 29, 25) == 0x3 - && G_FLD (inst->v, 2, 0) == 0x4 - && G_FLD (inst->v, 24, 20) == 0x3 - && G_FLD (inst->v, 19, 15) == 0x0) - { - /* sw r3, [r0, offset]+ */ - sp_offset += inst->len; - if (ra_offset_p == 0) - { - ra_offset = sp_offset; - ra_offset_p = 1; - } - } - else if (G_FLD (inst->v, 29, 25) == 0x3 - && G_FLD (inst->v, 2, 0) == 0x4 - && G_FLD (inst->v, 24, 20) == 0x2 - && G_FLD (inst->v, 19, 15) == 0x0) - { - /* sw r2, [r0, offset]+ */ - sp_offset += inst->len; - if (fp_offset_p == 0) - { - fp_offset = sp_offset; - fp_offset_p = 1; - } - } - else if (G_FLD (inst->v, 29, 25) == 0x7 - && G_FLD (inst->v, 2, 0) == 0x0 - && G_FLD (inst->v, 24, 20) == 0x3 - && G_FLD (inst->v, 19, 15) == 0x0) - { - /* lw r3, [r0]+, 4 */ - sp_offset -= inst->len; - ra_offset_p = 1; - } - else if (G_FLD (inst->v, 29, 25) == 0x7 - && G_FLD (inst->v, 2, 0) == 0x0 - && G_FLD (inst->v, 24, 20) == 0x2 - && G_FLD (inst->v, 19, 15) == 0x0) - { - /* lw r2, [r0]+, 4 */ - sp_offset -= inst->len; - fp_offset_p = 1; - } - else if (G_FLD (inst->v, 29, 25) == 0x1 - && G_FLD (inst->v, 19, 17) == 0x0 - && G_FLD (inst->v, 24, 20) == 0x0 - && G_FLD (inst->v, 0, 0) == 0x0) - { - /* addi r0, -offset */ - int imm = G_FLD (inst->v, 16, 1); - if (imm >> 15) - imm = -(0xFFFF - imm + 1); - sp_offset -= imm; - } - else if (G_FLD (inst->v, 29, 25) == 0x1 - && G_FLD (inst->v, 19, 17) == 0x0 - && G_FLD (inst->v, 24, 20) == 0x2 - && G_FLD (inst->v, 0, 0) == 0x0) - { - /* addi r2, offset */ - if (pc - cur_pc >= 2) - { - inst_t *inst2; - - cur_pc += inst->len; - inst2 = score3_adjust_pc_and_fetch_inst (&cur_pc, NULL, - byte_order); - - if (inst2->len == 2 - && G_FLD (inst2->v, 14, 10) == 0x10 - && G_FLD (inst2->v, 9, 5) == 0x0 - && G_FLD (inst2->v, 4, 0) == 0x2) - { - /* mv! r0, r2 */ - int imm = G_FLD (inst->v, 16, 1); - if (imm >> 15) - imm = -(0xFFFF - imm + 1); - sp_offset -= imm; - } - } - } - } - } - - /* Save RA. */ - if (ra_offset_p == 1) - { - if (this_cache->saved_regs[SCORE_PC_REGNUM].is_realreg () - && this_cache->saved_regs[SCORE_PC_REGNUM].realreg () - == SCORE_PC_REGNUM) - this_cache->saved_regs[SCORE_PC_REGNUM].set_addr (sp + sp_offset - - ra_offset); - } - else - { - this_cache->saved_regs[SCORE_PC_REGNUM] = - this_cache->saved_regs[SCORE_RA_REGNUM]; - } - - /* Save FP. */ - if (fp_offset_p == 1) - { - if (this_cache->saved_regs[SCORE_FP_REGNUM].is_realreg () - && this_cache->saved_regs[SCORE_FP_REGNUM].realreg () - == SCORE_FP_REGNUM) - this_cache->saved_regs[SCORE_FP_REGNUM].set_addr (sp + sp_offset - - fp_offset); - } - - /* Save SP and FP. */ - this_cache->base = sp + sp_offset; - this_cache->fp = fp; -} - -static struct score_frame_cache * -score_make_prologue_cache (struct frame_info *this_frame, void **this_cache) -{ - struct score_frame_cache *cache; - - if ((*this_cache) != NULL) - return (struct score_frame_cache *) (*this_cache); - - cache = FRAME_OBSTACK_ZALLOC (struct score_frame_cache); - (*this_cache) = cache; - cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); - - /* Analyze the prologue. */ - { - const CORE_ADDR pc = get_frame_pc (this_frame); - CORE_ADDR start_addr; - - find_pc_partial_function (pc, NULL, &start_addr, NULL); - if (start_addr == 0) - return cache; - - if (target_mach == bfd_mach_score3) - score3_analyze_prologue (start_addr, pc, this_frame, - (struct score_frame_cache *) *this_cache); - else - score7_analyze_prologue (start_addr, pc, this_frame, - (struct score_frame_cache *) *this_cache); - } - - /* Save SP. */ - cache->saved_regs[SCORE_SP_REGNUM].set_value (cache->base); - - return (struct score_frame_cache *) (*this_cache); -} - -static void -score_prologue_this_id (struct frame_info *this_frame, void **this_cache, - struct frame_id *this_id) -{ - struct score_frame_cache *info = score_make_prologue_cache (this_frame, - this_cache); - (*this_id) = frame_id_build (info->base, get_frame_func (this_frame)); -} - -static struct value * -score_prologue_prev_register (struct frame_info *this_frame, - void **this_cache, int regnum) -{ - struct score_frame_cache *info = score_make_prologue_cache (this_frame, - this_cache); - return trad_frame_get_prev_register (this_frame, info->saved_regs, regnum); -} - -static const struct frame_unwind score_prologue_unwind = -{ - "score prologue", - NORMAL_FRAME, - default_frame_unwind_stop_reason, - score_prologue_this_id, - score_prologue_prev_register, - NULL, - default_frame_sniffer, - NULL -}; - -static CORE_ADDR -score_prologue_frame_base_address (struct frame_info *this_frame, - void **this_cache) -{ - struct score_frame_cache *info = - score_make_prologue_cache (this_frame, this_cache); - return info->fp; -} - -static const struct frame_base score_prologue_frame_base = -{ - &score_prologue_unwind, - score_prologue_frame_base_address, - score_prologue_frame_base_address, - score_prologue_frame_base_address, -}; - -static const struct frame_base * -score_prologue_frame_base_sniffer (struct frame_info *this_frame) -{ - return &score_prologue_frame_base; -} - -/* Core file support. */ - -static const struct regcache_map_entry score7_linux_gregmap[] = - { - /* FIXME: According to the current Linux kernel, r0 is preceded by - 9 rather than 7 words. */ - { 7, REGCACHE_MAP_SKIP, 4 }, - { 32, 0, 4 }, /* r0 ... r31 */ - { 1, 55, 4 }, /* CEL */ - { 1, 54, 4 }, /* CEH */ - { 1, 53, 4 }, /* sr0, i.e. cnt or COUNTER */ - { 1, 52, 4 }, /* sr1, i.e. lcr or LDCR */ - { 1, 51, 4 }, /* sr2, i.e. scr or STCR */ - { 1, 49, 4 }, /* PC (same slot as EPC) */ - { 1, 38, 4 }, /* EMA */ - { 1, 32, 4 }, /* PSR */ - { 1, 34, 4 }, /* ECR */ - { 1, 33, 4 }, /* COND */ - { 0 } - }; - -#define SCORE7_LINUX_EPC_OFFSET (44 * 4) -#define SCORE7_LINUX_SIZEOF_GREGSET (49 * 4) - -static void -score7_linux_supply_gregset(const struct regset *regset, - struct regcache *regcache, - int regnum, const void *buf, - size_t size) -{ - regcache_supply_regset (regset, regcache, regnum, buf, size); - - /* Supply the EPC from the same slot as the PC. Note that the - collect function will store the PC in that slot. */ - if ((regnum == -1 || regnum == SCORE_EPC_REGNUM) - && size >= SCORE7_LINUX_EPC_OFFSET + 4) - regcache->raw_supply - (SCORE_EPC_REGNUM, (const gdb_byte *) buf + SCORE7_LINUX_EPC_OFFSET); -} - -static const struct regset score7_linux_gregset = - { - score7_linux_gregmap, - score7_linux_supply_gregset, - regcache_collect_regset - }; - -/* Iterate over core file register note sections. */ - -static void -score7_linux_iterate_over_regset_sections (struct gdbarch *gdbarch, - iterate_over_regset_sections_cb *cb, - void *cb_data, - const struct regcache *regcache) -{ - cb (".reg", SCORE7_LINUX_SIZEOF_GREGSET, SCORE7_LINUX_SIZEOF_GREGSET, - &score7_linux_gregset, NULL, cb_data); -} - -static struct gdbarch * -score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) -{ - struct gdbarch *gdbarch; - target_mach = info.bfd_arch_info->mach; - - arches = gdbarch_list_lookup_by_info (arches, &info); - if (arches != NULL) - { - return (arches->gdbarch); - } - gdbarch = gdbarch_alloc (&info, NULL); - - set_gdbarch_short_bit (gdbarch, 16); - set_gdbarch_int_bit (gdbarch, 32); - set_gdbarch_float_bit (gdbarch, 32); - set_gdbarch_double_bit (gdbarch, 64); - set_gdbarch_long_double_bit (gdbarch, 64); -#if WITH_SIM - set_gdbarch_register_sim_regno (gdbarch, score_register_sim_regno); -#endif - set_gdbarch_pc_regnum (gdbarch, SCORE_PC_REGNUM); - set_gdbarch_sp_regnum (gdbarch, SCORE_SP_REGNUM); - set_gdbarch_adjust_breakpoint_address (gdbarch, - score_adjust_breakpoint_address); - set_gdbarch_register_type (gdbarch, score_register_type); - set_gdbarch_frame_align (gdbarch, score_frame_align); - set_gdbarch_inner_than (gdbarch, core_addr_lessthan); - - switch (target_mach) - { - case bfd_mach_score7: - set_gdbarch_breakpoint_kind_from_pc (gdbarch, - score7_breakpoint_kind_from_pc); - set_gdbarch_sw_breakpoint_from_kind (gdbarch, - score7_sw_breakpoint_from_kind); - set_gdbarch_skip_prologue (gdbarch, score7_skip_prologue); - set_gdbarch_stack_frame_destroyed_p (gdbarch, - score7_stack_frame_destroyed_p); - set_gdbarch_register_name (gdbarch, score7_register_name); - set_gdbarch_num_regs (gdbarch, SCORE7_NUM_REGS); - /* Core file support. */ - set_gdbarch_iterate_over_regset_sections - (gdbarch, score7_linux_iterate_over_regset_sections); - break; - - case bfd_mach_score3: - set_gdbarch_breakpoint_kind_from_pc (gdbarch, - score3_breakpoint_kind_from_pc); - set_gdbarch_sw_breakpoint_from_kind (gdbarch, - score3_sw_breakpoint_from_kind); - set_gdbarch_skip_prologue (gdbarch, score3_skip_prologue); - set_gdbarch_stack_frame_destroyed_p (gdbarch, - score3_stack_frame_destroyed_p); - set_gdbarch_register_name (gdbarch, score3_register_name); - set_gdbarch_num_regs (gdbarch, SCORE3_NUM_REGS); - break; - } - - /* Watchpoint hooks. */ - set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1); - - /* Dummy frame hooks. */ - set_gdbarch_return_value (gdbarch, score_return_value); - set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT); - set_gdbarch_push_dummy_call (gdbarch, score_push_dummy_call); - - /* Normal frame hooks. */ - dwarf2_append_unwinders (gdbarch); - frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer); - frame_unwind_append_unwinder (gdbarch, &score_prologue_unwind); - frame_base_append_sniffer (gdbarch, score_prologue_frame_base_sniffer); - - return gdbarch; -} - -void _initialize_score_tdep (); -void -_initialize_score_tdep () -{ - gdbarch_register (bfd_arch_score, score_gdbarch_init, NULL); -} diff --git a/gdb/score-tdep.h b/gdb/score-tdep.h deleted file mode 100644 index 07c62f7e34d..00000000000 --- a/gdb/score-tdep.h +++ /dev/null @@ -1,50 +0,0 @@ -/* Target-dependent code for the S+core architecture, for GDB, - the GNU Debugger. - - Copyright (C) 2006-2022 Free Software Foundation, Inc. - - Contributed by Qinwei (qinwei@sunnorth.com.cn) - Contributed by Ching-Peng Lin (cplin@sunplus.com) - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. */ - -#ifndef SCORE_TDEP_H -#define SCORE_TDEP_H -#include "math.h" - -enum gdb_regnum -{ - SCORE_SP_REGNUM = 0, - SCORE_FP_REGNUM = 2, - SCORE_RA_REGNUM = 3, - SCORE_A0_REGNUM = 4, - SCORE_AL_REGNUM = 7, - SCORE_EPC_REGNUM = 37, - SCORE_PC_REGNUM = 49, -}; - -#define SCORE_A0_REGNUM 4 -#define SCORE_A1_REGNUM 5 -#define SCORE_REGSIZE 4 -#define SCORE7_NUM_REGS 56 -#define SCORE3_NUM_REGS 50 -#define SCORE_BEGIN_ARG_REGNUM 4 -#define SCORE_LAST_ARG_REGNUM 7 - -#define SCORE_INSTLEN 4 -#define SCORE16_INSTLEN 2 - -#endif /* SCORE_TDEP_H */ base-commit: 22546800ad34a5ac6bc90e6701de3e74bad75551 -- 2.26.2 ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] gdb: Remove support for S+core 2022-03-16 14:44 ` [PATCH] gdb: Remove support for S+core Pedro Alves @ 2022-03-16 15:55 ` Andrew Burgess 2022-03-16 16:28 ` Tom Tromey 2022-03-17 15:42 ` Pedro Alves 2 siblings, 0 replies; 7+ messages in thread From: Andrew Burgess @ 2022-03-16 15:55 UTC (permalink / raw) To: Pedro Alves, Tom Tromey, gdb-patches Pedro Alves <pedro@palves.net> writes: > On 2022-03-16 12:07, Pedro Alves wrote: >> On 2022-03-15 22:31, Tom Tromey wrote: >>> I randomly noticed that score-tdep.c sets a global variable from >>> score_gdbarch_init, and then reuses this in other spots in the file. >>> >>> This seems incorrect to me, at least if multiple inferiors or targets >>> are used; or potentially if there is a single gdb session that >>> switches back and forth between (sub-)architectures, causing the >>> global to be invalid. >>> >>> This patch fixes the problem by deferring the lookup. >>> >>> I wrote this just based on inspection, though, and have no way to test >>> it. I wonder if other *-tdep.c files have similar issues. >> >> >> Looks fine. >> >> I think we should just drop the whole score port, though. See here, from 2014 (!): >> >> https://sourceware.org/pipermail/gdb/2014-October/044643.html > > Like so. Given this has been removed from GCC for so long, and we never heard > of anyone using the port or file a bug report about it all these years, I think > we can just go ahead and delete it without a deprecation period. > > From bf4cfab66a3a35b164de3c63b57e4a5a228f2ac5 Mon Sep 17 00:00:00 2001 > From: Pedro Alves <pedro@palves.net> > Date: Wed, 16 Mar 2022 13:39:17 +0000 > Subject: [PATCH] gdb: Remove support for S+core > > GCC removed support for score back in 2014 already. Back then, we > basically agreed about removing it from GDB too, but it ended up being > forgotten. See: > > https://sourceware.org/pipermail/gdb/2014-October/044643.html > > Following through this time around. No objections from me. Thanks, Andrew > > Change-Id: I5b25a1ff7bce7b150d6f90f4c34047fae4b1f8b4 > --- > gdb/Makefile.in | 3 - > gdb/NEWS | 6 +- > gdb/configure.tgt | 5 - > gdb/score-tdep.c | 1527 --------------------------------------------- > gdb/score-tdep.h | 50 -- > 5 files changed, 5 insertions(+), 1586 deletions(-) > delete mode 100644 gdb/score-tdep.c > delete mode 100644 gdb/score-tdep.h > > diff --git a/gdb/Makefile.in b/gdb/Makefile.in > index 9bca9b0c5bc..aecab41eeb8 100644 > --- a/gdb/Makefile.in > +++ b/gdb/Makefile.in > @@ -837,7 +837,6 @@ ALL_TARGET_OBS = \ > s12z-tdep.o \ > s390-linux-tdep.o \ > s390-tdep.o \ > - score-tdep.o \ > sh-linux-tdep.o \ > sh-netbsd-tdep.o \ > sh-tdep.o \ > @@ -1426,7 +1425,6 @@ HFILES_NO_SRCDIR = \ > run-on-main-thread.h \ > s390-linux-tdep.h \ > s390-tdep.h \ > - score-tdep.h \ > selftest-arch.h \ > sentinel-frame.h \ > ser-base.h \ > @@ -2303,7 +2301,6 @@ ALLDEPFILES = \ > s390-linux-nat.c \ > s390-linux-tdep.c \ > s390-tdep.c \ > - score-tdep.c \ > ser-go32.c \ > ser-mingw.c \ > ser-pipe.c \ > diff --git a/gdb/NEWS b/gdb/NEWS > index bfa6b635718..c609da7e6cf 100644 > --- a/gdb/NEWS > +++ b/gdb/NEWS > @@ -174,7 +174,11 @@ info win > > * New targets > > -GNU/Linux/LoongArch loongarch*-*-linux* > +GNU/Linux/LoongArch loongarch*-*-linux* > + > +* Removed targets > + > +S+core score-*-* > > * Python API > > diff --git a/gdb/configure.tgt b/gdb/configure.tgt > index 65f3bf6387d..0705ccf32b8 100644 > --- a/gdb/configure.tgt > +++ b/gdb/configure.tgt > @@ -550,11 +550,6 @@ rx-*-*) > gdb_target_obs="rx-tdep.o" > ;; > > -score-*-*) > - # Target: S+core embedded system > - gdb_target_obs="score-tdep.o" > - ;; > - > sh*-*-linux*) > # Target: GNU/Linux Super-H > gdb_target_obs="sh-tdep.o sh-linux-tdep.o \ > diff --git a/gdb/score-tdep.c b/gdb/score-tdep.c > deleted file mode 100644 > index e20bee46df9..00000000000 > --- a/gdb/score-tdep.c > +++ /dev/null > @@ -1,1527 +0,0 @@ > -/* Target-dependent code for the S+core architecture, for GDB, > - the GNU Debugger. > - > - Copyright (C) 2006-2022 Free Software Foundation, Inc. > - > - Contributed by Qinwei (qinwei@sunnorth.com.cn) > - Contributed by Ching-Peng Lin (cplin@sunplus.com) > - > - This file is part of GDB. > - > - This program is free software; you can redistribute it and/or modify > - it under the terms of the GNU General Public License as published by > - the Free Software Foundation; either version 3 of the License, or > - (at your option) any later version. > - > - This program is distributed in the hope that it will be useful, > - but WITHOUT ANY WARRANTY; without even the implied warranty of > - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > - GNU General Public License for more details. > - > - You should have received a copy of the GNU General Public License > - along with this program. If not, see <http://www.gnu.org/licenses/>. */ > - > -#include "defs.h" > -#include "inferior.h" > -#include "symtab.h" > -#include "objfiles.h" > -#include "gdbcore.h" > -#include "target.h" > -#include "arch-utils.h" > -#include "regcache.h" > -#include "regset.h" > -#include "dis-asm.h" > -#include "frame-unwind.h" > -#include "frame-base.h" > -#include "trad-frame.h" > -#include "dwarf2/frame.h" > -#include "score-tdep.h" > - > -#define G_FLD(_i,_ms,_ls) \ > - ((unsigned)((_i) << (31 - (_ms))) >> (31 - (_ms) + (_ls))) > - > -typedef struct{ > - unsigned long long v; > - unsigned long long raw; > - unsigned int len; > -}inst_t; > - > -struct score_frame_cache > -{ > - CORE_ADDR base; > - CORE_ADDR fp; > - trad_frame_saved_reg *saved_regs; > -}; > - > -static int target_mach = bfd_mach_score7; > - > -static struct type * > -score_register_type (struct gdbarch *gdbarch, int regnum) > -{ > - gdb_assert (regnum >= 0 > - && regnum < ((target_mach == bfd_mach_score7) > - ? SCORE7_NUM_REGS : SCORE3_NUM_REGS)); > - return builtin_type (gdbarch)->builtin_uint32; > -} > - > -static const char * > -score7_register_name (struct gdbarch *gdbarch, int regnum) > -{ > - const char *score_register_names[] = { > - "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", > - "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", > - "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", > - "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", > - > - "PSR", "COND", "ECR", "EXCPVEC", "CCR", > - "EPC", "EMA", "TLBLOCK", "TLBPT", "PEADDR", > - "TLBRPT", "PEVN", "PECTX", "LIMPFN", "LDMPFN", > - "PREV", "DREG", "PC", "DSAVE", "COUNTER", > - "LDCR", "STCR", "CEH", "CEL", > - }; > - > - gdb_assert (regnum >= 0 && regnum < SCORE7_NUM_REGS); > - return score_register_names[regnum]; > -} > - > -static const char * > -score3_register_name (struct gdbarch *gdbarch, int regnum) > -{ > - const char *score_register_names[] = { > - "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", > - "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", > - "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", > - "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", > - > - "PSR", "COND", "ECR", "EXCPVEC", "CCR", > - "EPC", "EMA", "PREV", "DREG", "DSAVE", > - "COUNTER", "LDCR", "STCR", "CEH", "CEL", > - "", "", "PC", > - }; > - > - gdb_assert (regnum >= 0 && regnum < SCORE3_NUM_REGS); > - return score_register_names[regnum]; > -} > - > -#if WITH_SIM > -static int > -score_register_sim_regno (struct gdbarch *gdbarch, int regnum) > -{ > - gdb_assert (regnum >= 0 > - && regnum < ((target_mach == bfd_mach_score7) > - ? SCORE7_NUM_REGS : SCORE3_NUM_REGS)); > - return regnum; > -} > -#endif > - > -static inst_t * > -score7_fetch_inst (struct gdbarch *gdbarch, CORE_ADDR addr, gdb_byte *memblock) > -{ > - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); > - static inst_t inst = { 0, 0, 0 }; > - gdb_byte buf[SCORE_INSTLEN] = { 0 }; > - int big; > - int ret; > - > - if (target_has_execution () && memblock != NULL) > - { > - /* Fetch instruction from local MEMBLOCK. */ > - memcpy (buf, memblock, SCORE_INSTLEN); > - } > - else > - { > - /* Fetch instruction from target. */ > - ret = target_read_memory (addr & ~0x3, buf, SCORE_INSTLEN); > - if (ret) > - { > - error (_("Error: target_read_memory in file:%s, line:%d!"), > - __FILE__, __LINE__); > - return 0; > - } > - } > - > - inst.raw = extract_unsigned_integer (buf, SCORE_INSTLEN, byte_order); > - inst.len = (inst.raw & 0x80008000) ? 4 : 2; > - inst.v = ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF); > - big = (byte_order == BFD_ENDIAN_BIG); > - if (inst.len == 2) > - { > - if (big ^ ((addr & 0x2) == 2)) > - inst.v = G_FLD (inst.v, 29, 15); > - else > - inst.v = G_FLD (inst.v, 14, 0); > - } > - return &inst; > -} > - > -static inst_t * > -score3_adjust_pc_and_fetch_inst (CORE_ADDR *pcptr, int *lenptr, > - enum bfd_endian byte_order) > -{ > - static inst_t inst = { 0, 0, 0 }; > - > - struct breakplace > - { > - int break_offset; > - int inst_len; > - }; > - /* raw table 1 (column 2, 3, 4) > - * 0 1 0 * # 2 > - * 0 1 1 0 # 3 > - 0 1 1 0 * # 6 > - table 2 (column 1, 2, 3) > - * 0 0 * * # 0, 4 > - 0 1 0 * * # 2 > - 1 1 0 * * # 6 > - */ > - > - static const struct breakplace bk_table[16] = > - { > - /* table 1 */ > - {0, 0}, > - {0, 0}, > - {0, 4}, > - {0, 6}, > - {0, 0}, > - {0, 0}, > - {-2, 6}, > - {0, 0}, > - /* table 2 */ > - {0, 2}, > - {0, 0}, > - {-2, 4}, > - {0, 0}, > - {0, 2}, > - {0, 0}, > - {-4, 6}, > - {0, 0} > - }; > - > -#define EXTRACT_LEN 2 > - CORE_ADDR adjust_pc = *pcptr & ~0x1; > - gdb_byte buf[5][EXTRACT_LEN] = > - { > - {'\0', '\0'}, > - {'\0', '\0'}, > - {'\0', '\0'}, > - {'\0', '\0'}, > - {'\0', '\0'} > - }; > - int ret; > - unsigned int raw; > - unsigned int cbits = 0; > - int bk_index; > - int i, count; > - > - inst.v = 0; > - inst.raw = 0; > - inst.len = 0; > - > - adjust_pc -= 4; > - for (i = 0; i < 5; i++) > - { > - ret = target_read_memory (adjust_pc + 2 * i, buf[i], EXTRACT_LEN); > - if (ret != 0) > - { > - buf[i][0] = '\0'; > - buf[i][1] = '\0'; > - if (i == 2) > - error (_("Error: target_read_memory in file:%s, line:%d!"), > - __FILE__, __LINE__); > - } > - > - raw = extract_unsigned_integer (buf[i], EXTRACT_LEN, byte_order); > - cbits = (cbits << 1) | (raw >> 15); > - } > - adjust_pc += 4; > - > - if (cbits & 0x4) > - { > - /* table 1 */ > - cbits = (cbits >> 1) & 0x7; > - bk_index = cbits; > - } > - else > - { > - /* table 2 */ > - cbits = (cbits >> 2) & 0x7; > - bk_index = cbits + 8; > - } > - > - gdb_assert (!((bk_table[bk_index].break_offset == 0) > - && (bk_table[bk_index].inst_len == 0))); > - > - inst.len = bk_table[bk_index].inst_len; > - > - i = (bk_table[bk_index].break_offset + 4) / 2; > - count = inst.len / 2; > - for (; count > 0; i++, count--) > - { > - inst.raw = (inst.raw << 16) > - | extract_unsigned_integer (buf[i], EXTRACT_LEN, byte_order); > - } > - > - switch (inst.len) > - { > - case 2: > - inst.v = inst.raw & 0x7FFF; > - break; > - case 4: > - inst.v = ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF); > - break; > - case 6: > - inst.v = ((inst.raw >> 32 & 0x7FFF) << 30) > - | ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF); > - break; > - } > - > - if (pcptr) > - *pcptr = adjust_pc + bk_table[bk_index].break_offset; > - if (lenptr) > - *lenptr = bk_table[bk_index].inst_len; > - > -#undef EXTRACT_LEN > - > - return &inst; > -} > - > -/* Implement the breakpoint_kind_from_pc gdbarch method. */ > - > -static int > -score7_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr) > -{ > - int ret; > - unsigned int raw; > - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); > - gdb_byte buf[SCORE_INSTLEN] = { 0 }; > - > - if ((ret = target_read_memory (*pcptr & ~0x3, buf, SCORE_INSTLEN)) != 0) > - { > - error (_("Error: target_read_memory in file:%s, line:%d!"), > - __FILE__, __LINE__); > - } > - raw = extract_unsigned_integer (buf, SCORE_INSTLEN, byte_order); > - > - if (!(raw & 0x80008000)) > - { > - /* 16bits instruction. */ > - *pcptr &= ~0x1; > - return 2; > - } > - else > - { > - /* 32bits instruction. */ > - *pcptr &= ~0x3; > - return 4; > - } > -} > - > -/* Implement the sw_breakpoint_from_kind gdbarch method. */ > - > -static const gdb_byte * > -score7_sw_breakpoint_from_kind (struct gdbarch *gdbarch, int kind, int *size) > -{ > - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); > - > - *size = kind; > - > - if (kind == 4) > - { > - static gdb_byte big_breakpoint32[] = { 0x80, 0x00, 0x80, 0x06 }; > - static gdb_byte little_breakpoint32[] = { 0x06, 0x80, 0x00, 0x80 }; > - > - if (byte_order == BFD_ENDIAN_BIG) > - return big_breakpoint32; > - else > - return little_breakpoint32; > - } > - else > - { > - static gdb_byte big_breakpoint16[] = { 0x60, 0x02 }; > - static gdb_byte little_breakpoint16[] = { 0x02, 0x60 }; > - > - if (byte_order == BFD_ENDIAN_BIG) > - return big_breakpoint16; > - else > - return little_breakpoint16; > - } > -} > - > -/* Implement the breakpoint_kind_from_pc gdbarch method. */ > - > -static int > -score3_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr) > -{ > - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); > - int len; > - > - score3_adjust_pc_and_fetch_inst (pcptr, &len, byte_order); > - > - return len; > -} > - > -/* Implement the sw_breakpoint_from_kind gdbarch method. */ > - > -static const gdb_byte * > -score3_sw_breakpoint_from_kind (struct gdbarch *gdbarch, int kind, int *size) > -{ > - int index = 0; > - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); > - static gdb_byte score_break_insns[6][6] = { > - /* The following three instructions are big endian. */ > - { 0x00, 0x20 }, > - { 0x80, 0x00, 0x00, 0x06 }, > - { 0x80, 0x00, 0x80, 0x00, 0x00, 0x00 }, > - /* The following three instructions are little endian. */ > - { 0x20, 0x00 }, > - { 0x00, 0x80, 0x06, 0x00 }, > - { 0x00, 0x80, 0x00, 0x80, 0x00, 0x00 }}; > - > - *size = kind; > - > - index = ((byte_order == BFD_ENDIAN_BIG) ? 0 : 3) + (kind / 2 - 1); > - return score_break_insns[index]; > -} > - > -static CORE_ADDR > -score_adjust_breakpoint_address (struct gdbarch *gdbarch, CORE_ADDR bpaddr) > -{ > - CORE_ADDR adjust_pc = bpaddr; > - > - if (target_mach == bfd_mach_score3) > - score3_adjust_pc_and_fetch_inst (&adjust_pc, NULL, > - gdbarch_byte_order (gdbarch)); > - else > - adjust_pc = align_down (adjust_pc, 2); > - > - return adjust_pc; > -} > - > -static CORE_ADDR > -score_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) > -{ > - return align_down (addr, 16); > -} > - > -static void > -score_xfer_register (struct regcache *regcache, int regnum, int length, > - enum bfd_endian endian, gdb_byte *readbuf, > - const gdb_byte *writebuf, int buf_offset) > -{ > - int reg_offset = 0; > - gdb_assert (regnum >= 0 > - && regnum < ((target_mach == bfd_mach_score7) > - ? SCORE7_NUM_REGS : SCORE3_NUM_REGS)); > - > - switch (endian) > - { > - case BFD_ENDIAN_BIG: > - reg_offset = SCORE_REGSIZE - length; > - break; > - case BFD_ENDIAN_LITTLE: > - reg_offset = 0; > - break; > - case BFD_ENDIAN_UNKNOWN: > - reg_offset = 0; > - break; > - default: > - error (_("Error: score_xfer_register in file:%s, line:%d!"), > - __FILE__, __LINE__); > - } > - > - if (readbuf != NULL) > - regcache->cooked_read_part (regnum, reg_offset, length, > - readbuf + buf_offset); > - if (writebuf != NULL) > - regcache->cooked_write_part (regnum, reg_offset, length, > - writebuf + buf_offset); > -} > - > -static enum return_value_convention > -score_return_value (struct gdbarch *gdbarch, struct value *function, > - struct type *type, struct regcache *regcache, > - gdb_byte * readbuf, const gdb_byte * writebuf) > -{ > - if (type->code () == TYPE_CODE_STRUCT > - || type->code () == TYPE_CODE_UNION > - || type->code () == TYPE_CODE_ARRAY) > - return RETURN_VALUE_STRUCT_CONVENTION; > - else > - { > - int offset; > - int regnum; > - for (offset = 0, regnum = SCORE_A0_REGNUM; > - offset < TYPE_LENGTH (type); > - offset += SCORE_REGSIZE, regnum++) > - { > - int xfer = SCORE_REGSIZE; > - > - if (offset + xfer > TYPE_LENGTH (type)) > - xfer = TYPE_LENGTH (type) - offset; > - score_xfer_register (regcache, regnum, xfer, > - gdbarch_byte_order(gdbarch), > - readbuf, writebuf, offset); > - } > - return RETURN_VALUE_REGISTER_CONVENTION; > - } > -} > - > -static int > -score_type_needs_double_align (struct type *type) > -{ > - enum type_code typecode = type->code (); > - > - if ((typecode == TYPE_CODE_INT && TYPE_LENGTH (type) == 8) > - || (typecode == TYPE_CODE_FLT && TYPE_LENGTH (type) == 8)) > - return 1; > - else if (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION) > - { > - int i, n; > - > - n = type->num_fields (); > - for (i = 0; i < n; i++) > - if (score_type_needs_double_align (type->field (i).type ())) > - return 1; > - return 0; > - } > - return 0; > -} > - > -static CORE_ADDR > -score_push_dummy_call (struct gdbarch *gdbarch, struct value *function, > - struct regcache *regcache, CORE_ADDR bp_addr, > - int nargs, struct value **args, CORE_ADDR sp, > - function_call_return_method return_method, > - CORE_ADDR struct_addr) > -{ > - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); > - int argnum; > - int argreg; > - int arglen = 0; > - CORE_ADDR stack_offset = 0; > - CORE_ADDR addr = 0; > - > - /* Step 1, Save RA. */ > - regcache_cooked_write_unsigned (regcache, SCORE_RA_REGNUM, bp_addr); > - > - /* Step 2, Make space on the stack for the args. */ > - struct_addr = align_down (struct_addr, 16); > - sp = align_down (sp, 16); > - for (argnum = 0; argnum < nargs; argnum++) > - arglen += align_up (TYPE_LENGTH (value_type (args[argnum])), > - SCORE_REGSIZE); > - sp -= align_up (arglen, 16); > - > - argreg = SCORE_BEGIN_ARG_REGNUM; > - > - /* Step 3, Check if struct return then save the struct address to > - r4 and increase the stack_offset by 4. */ > - if (return_method == return_method_struct) > - { > - regcache_cooked_write_unsigned (regcache, argreg++, struct_addr); > - stack_offset += SCORE_REGSIZE; > - } > - > - /* Step 4, Load arguments: > - If arg length is too long (> 4 bytes), then split the arg and > - save every parts. */ > - for (argnum = 0; argnum < nargs; argnum++) > - { > - struct value *arg = args[argnum]; > - struct type *arg_type = check_typedef (value_type (arg)); > - enum type_code typecode = arg_type->code (); > - const gdb_byte *val = value_contents (arg).data (); > - int downward_offset = 0; > - int arg_last_part_p = 0; > - > - arglen = TYPE_LENGTH (arg_type); > - > - /* If a arg should be aligned to 8 bytes (long long or double), > - the value should be put to even register numbers. */ > - if (score_type_needs_double_align (arg_type)) > - { > - if (argreg & 1) > - argreg++; > - } > - > - /* If sizeof a block < SCORE_REGSIZE, then Score GCC will chose > - the default "downward"/"upward" method: > - > - Example: > - > - struct struc > - { > - char a; char b; char c; > - } s = {'a', 'b', 'c'}; > - > - Big endian: s = {X, 'a', 'b', 'c'} > - Little endian: s = {'a', 'b', 'c', X} > - > - Where X is a hole. */ > - > - if (gdbarch_byte_order(gdbarch) == BFD_ENDIAN_BIG > - && (typecode == TYPE_CODE_STRUCT > - || typecode == TYPE_CODE_UNION) > - && argreg > SCORE_LAST_ARG_REGNUM > - && arglen < SCORE_REGSIZE) > - downward_offset += (SCORE_REGSIZE - arglen); > - > - while (arglen > 0) > - { > - int partial_len = arglen < SCORE_REGSIZE ? arglen : SCORE_REGSIZE; > - ULONGEST regval = extract_unsigned_integer (val, partial_len, > - byte_order); > - > - /* The last part of a arg should shift left when > - gdbarch_byte_order is BFD_ENDIAN_BIG. */ > - if (byte_order == BFD_ENDIAN_BIG > - && arg_last_part_p == 1 > - && (typecode == TYPE_CODE_STRUCT > - || typecode == TYPE_CODE_UNION)) > - regval <<= ((SCORE_REGSIZE - partial_len) * TARGET_CHAR_BIT); > - > - /* Always increase the stack_offset and save args to stack. */ > - addr = sp + stack_offset + downward_offset; > - write_memory (addr, val, partial_len); > - > - if (argreg <= SCORE_LAST_ARG_REGNUM) > - { > - regcache_cooked_write_unsigned (regcache, argreg++, regval); > - if (arglen > SCORE_REGSIZE && arglen < SCORE_REGSIZE * 2) > - arg_last_part_p = 1; > - } > - > - val += partial_len; > - arglen -= partial_len; > - stack_offset += align_up (partial_len, SCORE_REGSIZE); > - } > - } > - > - /* Step 5, Save SP. */ > - regcache_cooked_write_unsigned (regcache, SCORE_SP_REGNUM, sp); > - > - return sp; > -} > - > -static CORE_ADDR > -score7_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) > -{ > - CORE_ADDR cpc = pc; > - int iscan = 32, stack_sub = 0; > - while (iscan-- > 0) > - { > - inst_t *inst = score7_fetch_inst (gdbarch, cpc, NULL); > - if (!inst) > - break; > - if ((inst->len == 4) && !stack_sub > - && (G_FLD (inst->v, 29, 25) == 0x1 > - && G_FLD (inst->v, 24, 20) == 0x0)) > - { > - /* addi r0, offset */ > - stack_sub = cpc + SCORE_INSTLEN; > - pc = cpc + SCORE_INSTLEN; > - } > - else if ((inst->len == 4) > - && (G_FLD (inst->v, 29, 25) == 0x0) > - && (G_FLD (inst->v, 24, 20) == 0x2) > - && (G_FLD (inst->v, 19, 15) == 0x0) > - && (G_FLD (inst->v, 14, 10) == 0xF) > - && (G_FLD (inst->v, 9, 0) == 0x56)) > - { > - /* mv r2, r0 */ > - pc = cpc + SCORE_INSTLEN; > - break; > - } > - else if ((inst->len == 2) > - && (G_FLD (inst->v, 14, 12) == 0x0) > - && (G_FLD (inst->v, 11, 8) == 0x2) > - && (G_FLD (inst->v, 7, 4) == 0x0) > - && (G_FLD (inst->v, 3, 0) == 0x3)) > - { > - /* mv! r2, r0 */ > - pc = cpc + SCORE16_INSTLEN; > - break; > - } > - else if ((inst->len == 2) > - && ((G_FLD (inst->v, 14, 12) == 3) /* j15 form */ > - || (G_FLD (inst->v, 14, 12) == 4) /* b15 form */ > - || (G_FLD (inst->v, 14, 12) == 0x0 > - && G_FLD (inst->v, 3, 0) == 0x4))) /* br! */ > - break; > - else if ((inst->len == 4) > - && ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */ > - || (G_FLD (inst->v, 29, 25) == 4) /* b32 form */ > - || (G_FLD (inst->v, 29, 25) == 0x0 > - && G_FLD (inst->v, 6, 1) == 0x4))) /* br */ > - break; > - > - cpc += (inst->len == 2) ? SCORE16_INSTLEN : SCORE_INSTLEN; > - } > - return pc; > -} > - > -static CORE_ADDR > -score3_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) > -{ > - CORE_ADDR cpc = pc; > - int iscan = 32, stack_sub = 0; > - while (iscan-- > 0) > - { > - inst_t *inst > - = score3_adjust_pc_and_fetch_inst (&cpc, NULL, > - gdbarch_byte_order (gdbarch)); > - > - if (!inst) > - break; > - if (inst->len == 4 && !stack_sub > - && (G_FLD (inst->v, 29, 25) == 0x1) > - && (G_FLD (inst->v, 19, 17) == 0x0) > - && (G_FLD (inst->v, 24, 20) == 0x0)) > - { > - /* addi r0, offset */ > - stack_sub = cpc + inst->len; > - pc = cpc + inst->len; > - } > - else if (inst->len == 4 > - && (G_FLD (inst->v, 29, 25) == 0x0) > - && (G_FLD (inst->v, 24, 20) == 0x2) > - && (G_FLD (inst->v, 19, 15) == 0x0) > - && (G_FLD (inst->v, 14, 10) == 0xF) > - && (G_FLD (inst->v, 9, 0) == 0x56)) > - { > - /* mv r2, r0 */ > - pc = cpc + inst->len; > - break; > - } > - else if ((inst->len == 2) > - && (G_FLD (inst->v, 14, 10) == 0x10) > - && (G_FLD (inst->v, 9, 5) == 0x2) > - && (G_FLD (inst->v, 4, 0) == 0x0)) > - { > - /* mv! r2, r0 */ > - pc = cpc + inst->len; > - break; > - } > - else if (inst->len == 2 > - && ((G_FLD (inst->v, 14, 12) == 3) /* b15 form */ > - || (G_FLD (inst->v, 14, 12) == 0x0 > - && G_FLD (inst->v, 11, 5) == 0x4))) /* br! */ > - break; > - else if (inst->len == 4 > - && ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */ > - || (G_FLD (inst->v, 29, 25) == 4))) /* b32 form */ > - break; > - > - cpc += inst->len; > - } > - return pc; > -} > - > -/* Implement the stack_frame_destroyed_p gdbarch method. */ > - > -static int > -score7_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc) > -{ > - inst_t *inst = score7_fetch_inst (gdbarch, cur_pc, NULL); > - > - if (inst->v == 0x23) > - return 1; /* mv! r0, r2 */ > - else if (G_FLD (inst->v, 14, 12) == 0x2 > - && G_FLD (inst->v, 3, 0) == 0xa) > - return 1; /* pop! */ > - else if (G_FLD (inst->v, 14, 12) == 0x0 > - && G_FLD (inst->v, 7, 0) == 0x34) > - return 1; /* br! r3 */ > - else if (G_FLD (inst->v, 29, 15) == 0x2 > - && G_FLD (inst->v, 6, 1) == 0x2b) > - return 1; /* mv r0, r2 */ > - else if (G_FLD (inst->v, 29, 25) == 0x0 > - && G_FLD (inst->v, 6, 1) == 0x4 > - && G_FLD (inst->v, 19, 15) == 0x3) > - return 1; /* br r3 */ > - else > - return 0; > -} > - > -/* Implement the stack_frame_destroyed_p gdbarch method. */ > - > -static int > -score3_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc) > -{ > - CORE_ADDR pc = cur_pc; > - inst_t *inst > - = score3_adjust_pc_and_fetch_inst (&pc, NULL, > - gdbarch_byte_order (gdbarch)); > - > - if (inst->len == 2 > - && (G_FLD (inst->v, 14, 10) == 0x10) > - && (G_FLD (inst->v, 9, 5) == 0x0) > - && (G_FLD (inst->v, 4, 0) == 0x2)) > - return 1; /* mv! r0, r2 */ > - else if (inst->len == 4 > - && (G_FLD (inst->v, 29, 25) == 0x0) > - && (G_FLD (inst->v, 24, 20) == 0x2) > - && (G_FLD (inst->v, 19, 15) == 0x0) > - && (G_FLD (inst->v, 14, 10) == 0xF) > - && (G_FLD (inst->v, 9, 0) == 0x56)) > - return 1; /* mv r0, r2 */ > - else if (inst->len == 2 > - && (G_FLD (inst->v, 14, 12) == 0x0) > - && (G_FLD (inst->v, 11, 5) == 0x2)) > - return 1; /* pop! */ > - else if (inst->len == 2 > - && (G_FLD (inst->v, 14, 12) == 0x0) > - && (G_FLD (inst->v, 11, 7) == 0x0) > - && (G_FLD (inst->v, 6, 5) == 0x2)) > - return 1; /* rpop! */ > - else if (inst->len == 2 > - && (G_FLD (inst->v, 14, 12) == 0x0) > - && (G_FLD (inst->v, 11, 5) == 0x4) > - && (G_FLD (inst->v, 4, 0) == 0x3)) > - return 1; /* br! r3 */ > - else if (inst->len == 4 > - && (G_FLD (inst->v, 29, 25) == 0x0) > - && (G_FLD (inst->v, 24, 20) == 0x0) > - && (G_FLD (inst->v, 19, 15) == 0x3) > - && (G_FLD (inst->v, 14, 10) == 0xF) > - && (G_FLD (inst->v, 9, 0) == 0x8)) > - return 1; /* br r3 */ > - else > - return 0; > -} > - > -static gdb_byte * > -score7_malloc_and_get_memblock (CORE_ADDR addr, CORE_ADDR size) > -{ > - int ret; > - gdb_byte *memblock = NULL; > - > - if (size == 0) > - return NULL; > - > - memblock = (gdb_byte *) xmalloc (size); > - memset (memblock, 0, size); > - ret = target_read_memory (addr & ~0x3, memblock, size); > - if (ret) > - { > - error (_("Error: target_read_memory in file:%s, line:%d!"), > - __FILE__, __LINE__); > - return NULL; > - } > - return memblock; > -} > - > -static void > -score7_free_memblock (gdb_byte *memblock) > -{ > - xfree (memblock); > -} > - > -static void > -score7_adjust_memblock_ptr (gdb_byte **memblock, CORE_ADDR prev_pc, > - CORE_ADDR cur_pc) > -{ > - if (prev_pc == -1) > - { > - /* First time call this function, do nothing. */ > - } > - else if (cur_pc - prev_pc == 2 && (cur_pc & 0x3) == 0) > - { > - /* First 16-bit instruction, then 32-bit instruction. */ > - *memblock += SCORE_INSTLEN; > - } > - else if (cur_pc - prev_pc == 4) > - { > - /* Is 32-bit instruction, increase MEMBLOCK by 4. */ > - *memblock += SCORE_INSTLEN; > - } > -} > - > -static void > -score7_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc, > - struct frame_info *this_frame, > - struct score_frame_cache *this_cache) > -{ > - struct gdbarch *gdbarch = get_frame_arch (this_frame); > - CORE_ADDR sp; > - CORE_ADDR fp; > - CORE_ADDR cur_pc = startaddr; > - > - int sp_offset = 0; > - int ra_offset = 0; > - int fp_offset = 0; > - int ra_offset_p = 0; > - int fp_offset_p = 0; > - int inst_len = 0; > - > - gdb_byte *memblock = NULL; > - gdb_byte *memblock_ptr = NULL; > - CORE_ADDR prev_pc = -1; > - > - /* Allocate MEMBLOCK if PC - STARTADDR > 0. */ > - memblock_ptr = memblock = > - score7_malloc_and_get_memblock (startaddr, pc - startaddr); > - > - sp = get_frame_register_unsigned (this_frame, SCORE_SP_REGNUM); > - fp = get_frame_register_unsigned (this_frame, SCORE_FP_REGNUM); > - > - for (; cur_pc < pc; prev_pc = cur_pc, cur_pc += inst_len) > - { > - inst_t *inst = NULL; > - if (memblock != NULL) > - { > - /* Reading memory block from target successfully and got all > - the instructions(from STARTADDR to PC) needed. */ > - score7_adjust_memblock_ptr (&memblock, prev_pc, cur_pc); > - inst = score7_fetch_inst (gdbarch, cur_pc, memblock); > - } > - else > - { > - /* Otherwise, we fetch 4 bytes from target, and GDB also > - work correctly. */ > - inst = score7_fetch_inst (gdbarch, cur_pc, NULL); > - } > - > - /* FIXME: make a full-power prologue analyzer. */ > - if (inst->len == 2) > - { > - inst_len = SCORE16_INSTLEN; > - > - if (G_FLD (inst->v, 14, 12) == 0x2 > - && G_FLD (inst->v, 3, 0) == 0xe) > - { > - /* push! */ > - sp_offset += 4; > - > - if (G_FLD (inst->v, 11, 7) == 0x6 > - && ra_offset_p == 0) > - { > - /* push! r3, [r0] */ > - ra_offset = sp_offset; > - ra_offset_p = 1; > - } > - else if (G_FLD (inst->v, 11, 7) == 0x4 > - && fp_offset_p == 0) > - { > - /* push! r2, [r0] */ > - fp_offset = sp_offset; > - fp_offset_p = 1; > - } > - } > - else if (G_FLD (inst->v, 14, 12) == 0x2 > - && G_FLD (inst->v, 3, 0) == 0xa) > - { > - /* pop! */ > - sp_offset -= 4; > - } > - else if (G_FLD (inst->v, 14, 7) == 0xc1 > - && G_FLD (inst->v, 2, 0) == 0x0) > - { > - /* subei! r0, n */ > - sp_offset += (int) pow (2.0, G_FLD (inst->v, 6, 3)); > - } > - else if (G_FLD (inst->v, 14, 7) == 0xc0 > - && G_FLD (inst->v, 2, 0) == 0x0) > - { > - /* addei! r0, n */ > - /* Solaris 11+gcc 5.5 has ambiguous overloads of pow, so we > - pass 2.0 instead of 2 to get the right one. */ > - sp_offset -= (int) pow (2.0, G_FLD (inst->v, 6, 3)); > - } > - } > - else > - { > - inst_len = SCORE_INSTLEN; > - > - if (G_FLD(inst->v, 29, 25) == 0x3 > - && G_FLD(inst->v, 2, 0) == 0x4 > - && G_FLD(inst->v, 19, 15) == 0) > - { > - /* sw rD, [r0, offset]+ */ > - sp_offset += SCORE_INSTLEN; > - > - if (G_FLD(inst->v, 24, 20) == 0x3) > - { > - /* rD = r3 */ > - if (ra_offset_p == 0) > - { > - ra_offset = sp_offset; > - ra_offset_p = 1; > - } > - } > - else if (G_FLD(inst->v, 24, 20) == 0x2) > - { > - /* rD = r2 */ > - if (fp_offset_p == 0) > - { > - fp_offset = sp_offset; > - fp_offset_p = 1; > - } > - } > - } > - else if (G_FLD(inst->v, 29, 25) == 0x14 > - && G_FLD(inst->v, 19,15) == 0) > - { > - /* sw rD, [r0, offset] */ > - if (G_FLD(inst->v, 24, 20) == 0x3) > - { > - /* rD = r3 */ > - ra_offset = sp_offset - G_FLD(inst->v, 14, 0); > - ra_offset_p = 1; > - } > - else if (G_FLD(inst->v, 24, 20) == 0x2) > - { > - /* rD = r2 */ > - fp_offset = sp_offset - G_FLD(inst->v, 14, 0); > - fp_offset_p = 1; > - } > - } > - else if (G_FLD (inst->v, 29, 15) == 0x1c60 > - && G_FLD (inst->v, 2, 0) == 0x0) > - { > - /* lw r3, [r0]+, 4 */ > - sp_offset -= SCORE_INSTLEN; > - ra_offset_p = 1; > - } > - else if (G_FLD (inst->v, 29, 15) == 0x1c40 > - && G_FLD (inst->v, 2, 0) == 0x0) > - { > - /* lw r2, [r0]+, 4 */ > - sp_offset -= SCORE_INSTLEN; > - fp_offset_p = 1; > - } > - > - else if (G_FLD (inst->v, 29, 17) == 0x100 > - && G_FLD (inst->v, 0, 0) == 0x0) > - { > - /* addi r0, -offset */ > - sp_offset += 65536 - G_FLD (inst->v, 16, 1); > - } > - else if (G_FLD (inst->v, 29, 17) == 0x110 > - && G_FLD (inst->v, 0, 0) == 0x0) > - { > - /* addi r2, offset */ > - if (pc - cur_pc > 4) > - { > - unsigned int save_v = inst->v; > - inst_t *inst2 = > - score7_fetch_inst (gdbarch, cur_pc + SCORE_INSTLEN, NULL); > - if (inst2->v == 0x23) > - { > - /* mv! r0, r2 */ > - sp_offset -= G_FLD (save_v, 16, 1); > - } > - } > - } > - } > - } > - > - /* Save RA. */ > - if (ra_offset_p == 1) > - { > - if (this_cache->saved_regs[SCORE_PC_REGNUM].is_realreg () > - && this_cache->saved_regs[SCORE_PC_REGNUM].realreg () > - == SCORE_PC_REGNUM) > - this_cache->saved_regs[SCORE_PC_REGNUM].set_addr (sp + sp_offset > - - ra_offset); > - } > - else > - { > - this_cache->saved_regs[SCORE_PC_REGNUM] = > - this_cache->saved_regs[SCORE_RA_REGNUM]; > - } > - > - /* Save FP. */ > - if (fp_offset_p == 1) > - { > - if (this_cache->saved_regs[SCORE_FP_REGNUM].is_realreg () > - && this_cache->saved_regs[SCORE_FP_REGNUM].realreg () > - == SCORE_FP_REGNUM) > - this_cache->saved_regs[SCORE_FP_REGNUM].set_addr (sp + sp_offset > - - fp_offset); > - } > - > - /* Save SP and FP. */ > - this_cache->base = sp + sp_offset; > - this_cache->fp = fp; > - > - /* Don't forget to free MEMBLOCK if we allocated it. */ > - if (memblock_ptr != NULL) > - score7_free_memblock (memblock_ptr); > -} > - > -static void > -score3_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc, > - struct frame_info *this_frame, > - struct score_frame_cache *this_cache) > -{ > - CORE_ADDR sp; > - CORE_ADDR fp; > - CORE_ADDR cur_pc = startaddr; > - enum bfd_endian byte_order > - = gdbarch_byte_order (get_frame_arch (this_frame)); > - > - int sp_offset = 0; > - int ra_offset = 0; > - int fp_offset = 0; > - int ra_offset_p = 0; > - int fp_offset_p = 0; > - int inst_len = 0; > - > - sp = get_frame_register_unsigned (this_frame, SCORE_SP_REGNUM); > - fp = get_frame_register_unsigned (this_frame, SCORE_FP_REGNUM); > - > - for (; cur_pc < pc; cur_pc += inst_len) > - { > - inst_t *inst = NULL; > - > - inst = score3_adjust_pc_and_fetch_inst (&cur_pc, &inst_len, byte_order); > - > - /* FIXME: make a full-power prologue analyzer. */ > - if (inst->len == 2) > - { > - if (G_FLD (inst->v, 14, 12) == 0x0 > - && G_FLD (inst->v, 11, 7) == 0x0 > - && G_FLD (inst->v, 6, 5) == 0x3) > - { > - /* push! */ > - sp_offset += 4; > - > - if (G_FLD (inst->v, 4, 0) == 0x3 > - && ra_offset_p == 0) > - { > - /* push! r3, [r0] */ > - ra_offset = sp_offset; > - ra_offset_p = 1; > - } > - else if (G_FLD (inst->v, 4, 0) == 0x2 > - && fp_offset_p == 0) > - { > - /* push! r2, [r0] */ > - fp_offset = sp_offset; > - fp_offset_p = 1; > - } > - } > - else if (G_FLD (inst->v, 14, 12) == 0x6 > - && G_FLD (inst->v, 11, 10) == 0x3) > - { > - /* rpush! */ > - int start_r = G_FLD (inst->v, 9, 5); > - int cnt = G_FLD (inst->v, 4, 0); > - > - if ((ra_offset_p == 0) > - && (start_r <= SCORE_RA_REGNUM) > - && (SCORE_RA_REGNUM < start_r + cnt)) > - { > - /* rpush! contains r3 */ > - ra_offset_p = 1; > - ra_offset = sp_offset + 4 * (SCORE_RA_REGNUM - start_r) + 4; > - } > - > - if ((fp_offset_p == 0) > - && (start_r <= SCORE_FP_REGNUM) > - && (SCORE_FP_REGNUM < start_r + cnt)) > - { > - /* rpush! contains r2 */ > - fp_offset_p = 1; > - fp_offset = sp_offset + 4 * (SCORE_FP_REGNUM - start_r) + 4; > - } > - > - sp_offset += 4 * cnt; > - } > - else if (G_FLD (inst->v, 14, 12) == 0x0 > - && G_FLD (inst->v, 11, 7) == 0x0 > - && G_FLD (inst->v, 6, 5) == 0x2) > - { > - /* pop! */ > - sp_offset -= 4; > - } > - else if (G_FLD (inst->v, 14, 12) == 0x6 > - && G_FLD (inst->v, 11, 10) == 0x2) > - { > - /* rpop! */ > - sp_offset -= 4 * G_FLD (inst->v, 4, 0); > - } > - else if (G_FLD (inst->v, 14, 12) == 0x5 > - && G_FLD (inst->v, 11, 10) == 0x3 > - && G_FLD (inst->v, 9, 6) == 0x0) > - { > - /* addi! r0, -offset */ > - int imm = G_FLD (inst->v, 5, 0); > - if (imm >> 5) > - imm = -(0x3F - imm + 1); > - sp_offset -= imm; > - } > - else if (G_FLD (inst->v, 14, 12) == 0x5 > - && G_FLD (inst->v, 11, 10) == 0x3 > - && G_FLD (inst->v, 9, 6) == 0x2) > - { > - /* addi! r2, offset */ > - if (pc - cur_pc >= 2) > - { > - inst_t *inst2; > - > - cur_pc += inst->len; > - inst2 = score3_adjust_pc_and_fetch_inst (&cur_pc, NULL, > - byte_order); > - > - if (inst2->len == 2 > - && G_FLD (inst2->v, 14, 10) == 0x10 > - && G_FLD (inst2->v, 9, 5) == 0x0 > - && G_FLD (inst2->v, 4, 0) == 0x2) > - { > - /* mv! r0, r2 */ > - int imm = G_FLD (inst->v, 5, 0); > - if (imm >> 5) > - imm = -(0x3F - imm + 1); > - sp_offset -= imm; > - } > - } > - } > - } > - else if (inst->len == 4) > - { > - if (G_FLD (inst->v, 29, 25) == 0x3 > - && G_FLD (inst->v, 2, 0) == 0x4 > - && G_FLD (inst->v, 24, 20) == 0x3 > - && G_FLD (inst->v, 19, 15) == 0x0) > - { > - /* sw r3, [r0, offset]+ */ > - sp_offset += inst->len; > - if (ra_offset_p == 0) > - { > - ra_offset = sp_offset; > - ra_offset_p = 1; > - } > - } > - else if (G_FLD (inst->v, 29, 25) == 0x3 > - && G_FLD (inst->v, 2, 0) == 0x4 > - && G_FLD (inst->v, 24, 20) == 0x2 > - && G_FLD (inst->v, 19, 15) == 0x0) > - { > - /* sw r2, [r0, offset]+ */ > - sp_offset += inst->len; > - if (fp_offset_p == 0) > - { > - fp_offset = sp_offset; > - fp_offset_p = 1; > - } > - } > - else if (G_FLD (inst->v, 29, 25) == 0x7 > - && G_FLD (inst->v, 2, 0) == 0x0 > - && G_FLD (inst->v, 24, 20) == 0x3 > - && G_FLD (inst->v, 19, 15) == 0x0) > - { > - /* lw r3, [r0]+, 4 */ > - sp_offset -= inst->len; > - ra_offset_p = 1; > - } > - else if (G_FLD (inst->v, 29, 25) == 0x7 > - && G_FLD (inst->v, 2, 0) == 0x0 > - && G_FLD (inst->v, 24, 20) == 0x2 > - && G_FLD (inst->v, 19, 15) == 0x0) > - { > - /* lw r2, [r0]+, 4 */ > - sp_offset -= inst->len; > - fp_offset_p = 1; > - } > - else if (G_FLD (inst->v, 29, 25) == 0x1 > - && G_FLD (inst->v, 19, 17) == 0x0 > - && G_FLD (inst->v, 24, 20) == 0x0 > - && G_FLD (inst->v, 0, 0) == 0x0) > - { > - /* addi r0, -offset */ > - int imm = G_FLD (inst->v, 16, 1); > - if (imm >> 15) > - imm = -(0xFFFF - imm + 1); > - sp_offset -= imm; > - } > - else if (G_FLD (inst->v, 29, 25) == 0x1 > - && G_FLD (inst->v, 19, 17) == 0x0 > - && G_FLD (inst->v, 24, 20) == 0x2 > - && G_FLD (inst->v, 0, 0) == 0x0) > - { > - /* addi r2, offset */ > - if (pc - cur_pc >= 2) > - { > - inst_t *inst2; > - > - cur_pc += inst->len; > - inst2 = score3_adjust_pc_and_fetch_inst (&cur_pc, NULL, > - byte_order); > - > - if (inst2->len == 2 > - && G_FLD (inst2->v, 14, 10) == 0x10 > - && G_FLD (inst2->v, 9, 5) == 0x0 > - && G_FLD (inst2->v, 4, 0) == 0x2) > - { > - /* mv! r0, r2 */ > - int imm = G_FLD (inst->v, 16, 1); > - if (imm >> 15) > - imm = -(0xFFFF - imm + 1); > - sp_offset -= imm; > - } > - } > - } > - } > - } > - > - /* Save RA. */ > - if (ra_offset_p == 1) > - { > - if (this_cache->saved_regs[SCORE_PC_REGNUM].is_realreg () > - && this_cache->saved_regs[SCORE_PC_REGNUM].realreg () > - == SCORE_PC_REGNUM) > - this_cache->saved_regs[SCORE_PC_REGNUM].set_addr (sp + sp_offset > - - ra_offset); > - } > - else > - { > - this_cache->saved_regs[SCORE_PC_REGNUM] = > - this_cache->saved_regs[SCORE_RA_REGNUM]; > - } > - > - /* Save FP. */ > - if (fp_offset_p == 1) > - { > - if (this_cache->saved_regs[SCORE_FP_REGNUM].is_realreg () > - && this_cache->saved_regs[SCORE_FP_REGNUM].realreg () > - == SCORE_FP_REGNUM) > - this_cache->saved_regs[SCORE_FP_REGNUM].set_addr (sp + sp_offset > - - fp_offset); > - } > - > - /* Save SP and FP. */ > - this_cache->base = sp + sp_offset; > - this_cache->fp = fp; > -} > - > -static struct score_frame_cache * > -score_make_prologue_cache (struct frame_info *this_frame, void **this_cache) > -{ > - struct score_frame_cache *cache; > - > - if ((*this_cache) != NULL) > - return (struct score_frame_cache *) (*this_cache); > - > - cache = FRAME_OBSTACK_ZALLOC (struct score_frame_cache); > - (*this_cache) = cache; > - cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); > - > - /* Analyze the prologue. */ > - { > - const CORE_ADDR pc = get_frame_pc (this_frame); > - CORE_ADDR start_addr; > - > - find_pc_partial_function (pc, NULL, &start_addr, NULL); > - if (start_addr == 0) > - return cache; > - > - if (target_mach == bfd_mach_score3) > - score3_analyze_prologue (start_addr, pc, this_frame, > - (struct score_frame_cache *) *this_cache); > - else > - score7_analyze_prologue (start_addr, pc, this_frame, > - (struct score_frame_cache *) *this_cache); > - } > - > - /* Save SP. */ > - cache->saved_regs[SCORE_SP_REGNUM].set_value (cache->base); > - > - return (struct score_frame_cache *) (*this_cache); > -} > - > -static void > -score_prologue_this_id (struct frame_info *this_frame, void **this_cache, > - struct frame_id *this_id) > -{ > - struct score_frame_cache *info = score_make_prologue_cache (this_frame, > - this_cache); > - (*this_id) = frame_id_build (info->base, get_frame_func (this_frame)); > -} > - > -static struct value * > -score_prologue_prev_register (struct frame_info *this_frame, > - void **this_cache, int regnum) > -{ > - struct score_frame_cache *info = score_make_prologue_cache (this_frame, > - this_cache); > - return trad_frame_get_prev_register (this_frame, info->saved_regs, regnum); > -} > - > -static const struct frame_unwind score_prologue_unwind = > -{ > - "score prologue", > - NORMAL_FRAME, > - default_frame_unwind_stop_reason, > - score_prologue_this_id, > - score_prologue_prev_register, > - NULL, > - default_frame_sniffer, > - NULL > -}; > - > -static CORE_ADDR > -score_prologue_frame_base_address (struct frame_info *this_frame, > - void **this_cache) > -{ > - struct score_frame_cache *info = > - score_make_prologue_cache (this_frame, this_cache); > - return info->fp; > -} > - > -static const struct frame_base score_prologue_frame_base = > -{ > - &score_prologue_unwind, > - score_prologue_frame_base_address, > - score_prologue_frame_base_address, > - score_prologue_frame_base_address, > -}; > - > -static const struct frame_base * > -score_prologue_frame_base_sniffer (struct frame_info *this_frame) > -{ > - return &score_prologue_frame_base; > -} > - > -/* Core file support. */ > - > -static const struct regcache_map_entry score7_linux_gregmap[] = > - { > - /* FIXME: According to the current Linux kernel, r0 is preceded by > - 9 rather than 7 words. */ > - { 7, REGCACHE_MAP_SKIP, 4 }, > - { 32, 0, 4 }, /* r0 ... r31 */ > - { 1, 55, 4 }, /* CEL */ > - { 1, 54, 4 }, /* CEH */ > - { 1, 53, 4 }, /* sr0, i.e. cnt or COUNTER */ > - { 1, 52, 4 }, /* sr1, i.e. lcr or LDCR */ > - { 1, 51, 4 }, /* sr2, i.e. scr or STCR */ > - { 1, 49, 4 }, /* PC (same slot as EPC) */ > - { 1, 38, 4 }, /* EMA */ > - { 1, 32, 4 }, /* PSR */ > - { 1, 34, 4 }, /* ECR */ > - { 1, 33, 4 }, /* COND */ > - { 0 } > - }; > - > -#define SCORE7_LINUX_EPC_OFFSET (44 * 4) > -#define SCORE7_LINUX_SIZEOF_GREGSET (49 * 4) > - > -static void > -score7_linux_supply_gregset(const struct regset *regset, > - struct regcache *regcache, > - int regnum, const void *buf, > - size_t size) > -{ > - regcache_supply_regset (regset, regcache, regnum, buf, size); > - > - /* Supply the EPC from the same slot as the PC. Note that the > - collect function will store the PC in that slot. */ > - if ((regnum == -1 || regnum == SCORE_EPC_REGNUM) > - && size >= SCORE7_LINUX_EPC_OFFSET + 4) > - regcache->raw_supply > - (SCORE_EPC_REGNUM, (const gdb_byte *) buf + SCORE7_LINUX_EPC_OFFSET); > -} > - > -static const struct regset score7_linux_gregset = > - { > - score7_linux_gregmap, > - score7_linux_supply_gregset, > - regcache_collect_regset > - }; > - > -/* Iterate over core file register note sections. */ > - > -static void > -score7_linux_iterate_over_regset_sections (struct gdbarch *gdbarch, > - iterate_over_regset_sections_cb *cb, > - void *cb_data, > - const struct regcache *regcache) > -{ > - cb (".reg", SCORE7_LINUX_SIZEOF_GREGSET, SCORE7_LINUX_SIZEOF_GREGSET, > - &score7_linux_gregset, NULL, cb_data); > -} > - > -static struct gdbarch * > -score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) > -{ > - struct gdbarch *gdbarch; > - target_mach = info.bfd_arch_info->mach; > - > - arches = gdbarch_list_lookup_by_info (arches, &info); > - if (arches != NULL) > - { > - return (arches->gdbarch); > - } > - gdbarch = gdbarch_alloc (&info, NULL); > - > - set_gdbarch_short_bit (gdbarch, 16); > - set_gdbarch_int_bit (gdbarch, 32); > - set_gdbarch_float_bit (gdbarch, 32); > - set_gdbarch_double_bit (gdbarch, 64); > - set_gdbarch_long_double_bit (gdbarch, 64); > -#if WITH_SIM > - set_gdbarch_register_sim_regno (gdbarch, score_register_sim_regno); > -#endif > - set_gdbarch_pc_regnum (gdbarch, SCORE_PC_REGNUM); > - set_gdbarch_sp_regnum (gdbarch, SCORE_SP_REGNUM); > - set_gdbarch_adjust_breakpoint_address (gdbarch, > - score_adjust_breakpoint_address); > - set_gdbarch_register_type (gdbarch, score_register_type); > - set_gdbarch_frame_align (gdbarch, score_frame_align); > - set_gdbarch_inner_than (gdbarch, core_addr_lessthan); > - > - switch (target_mach) > - { > - case bfd_mach_score7: > - set_gdbarch_breakpoint_kind_from_pc (gdbarch, > - score7_breakpoint_kind_from_pc); > - set_gdbarch_sw_breakpoint_from_kind (gdbarch, > - score7_sw_breakpoint_from_kind); > - set_gdbarch_skip_prologue (gdbarch, score7_skip_prologue); > - set_gdbarch_stack_frame_destroyed_p (gdbarch, > - score7_stack_frame_destroyed_p); > - set_gdbarch_register_name (gdbarch, score7_register_name); > - set_gdbarch_num_regs (gdbarch, SCORE7_NUM_REGS); > - /* Core file support. */ > - set_gdbarch_iterate_over_regset_sections > - (gdbarch, score7_linux_iterate_over_regset_sections); > - break; > - > - case bfd_mach_score3: > - set_gdbarch_breakpoint_kind_from_pc (gdbarch, > - score3_breakpoint_kind_from_pc); > - set_gdbarch_sw_breakpoint_from_kind (gdbarch, > - score3_sw_breakpoint_from_kind); > - set_gdbarch_skip_prologue (gdbarch, score3_skip_prologue); > - set_gdbarch_stack_frame_destroyed_p (gdbarch, > - score3_stack_frame_destroyed_p); > - set_gdbarch_register_name (gdbarch, score3_register_name); > - set_gdbarch_num_regs (gdbarch, SCORE3_NUM_REGS); > - break; > - } > - > - /* Watchpoint hooks. */ > - set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1); > - > - /* Dummy frame hooks. */ > - set_gdbarch_return_value (gdbarch, score_return_value); > - set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT); > - set_gdbarch_push_dummy_call (gdbarch, score_push_dummy_call); > - > - /* Normal frame hooks. */ > - dwarf2_append_unwinders (gdbarch); > - frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer); > - frame_unwind_append_unwinder (gdbarch, &score_prologue_unwind); > - frame_base_append_sniffer (gdbarch, score_prologue_frame_base_sniffer); > - > - return gdbarch; > -} > - > -void _initialize_score_tdep (); > -void > -_initialize_score_tdep () > -{ > - gdbarch_register (bfd_arch_score, score_gdbarch_init, NULL); > -} > diff --git a/gdb/score-tdep.h b/gdb/score-tdep.h > deleted file mode 100644 > index 07c62f7e34d..00000000000 > --- a/gdb/score-tdep.h > +++ /dev/null > @@ -1,50 +0,0 @@ > -/* Target-dependent code for the S+core architecture, for GDB, > - the GNU Debugger. > - > - Copyright (C) 2006-2022 Free Software Foundation, Inc. > - > - Contributed by Qinwei (qinwei@sunnorth.com.cn) > - Contributed by Ching-Peng Lin (cplin@sunplus.com) > - > - This file is part of GDB. > - > - This program is free software; you can redistribute it and/or modify > - it under the terms of the GNU General Public License as published by > - the Free Software Foundation; either version 3 of the License, or > - (at your option) any later version. > - > - This program is distributed in the hope that it will be useful, > - but WITHOUT ANY WARRANTY; without even the implied warranty of > - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > - GNU General Public License for more details. > - > - You should have received a copy of the GNU General Public License > - along with this program. If not, see <http://www.gnu.org/licenses/>. */ > - > -#ifndef SCORE_TDEP_H > -#define SCORE_TDEP_H > -#include "math.h" > - > -enum gdb_regnum > -{ > - SCORE_SP_REGNUM = 0, > - SCORE_FP_REGNUM = 2, > - SCORE_RA_REGNUM = 3, > - SCORE_A0_REGNUM = 4, > - SCORE_AL_REGNUM = 7, > - SCORE_EPC_REGNUM = 37, > - SCORE_PC_REGNUM = 49, > -}; > - > -#define SCORE_A0_REGNUM 4 > -#define SCORE_A1_REGNUM 5 > -#define SCORE_REGSIZE 4 > -#define SCORE7_NUM_REGS 56 > -#define SCORE3_NUM_REGS 50 > -#define SCORE_BEGIN_ARG_REGNUM 4 > -#define SCORE_LAST_ARG_REGNUM 7 > - > -#define SCORE_INSTLEN 4 > -#define SCORE16_INSTLEN 2 > - > -#endif /* SCORE_TDEP_H */ > > base-commit: 22546800ad34a5ac6bc90e6701de3e74bad75551 > -- > 2.26.2 ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] gdb: Remove support for S+core 2022-03-16 14:44 ` [PATCH] gdb: Remove support for S+core Pedro Alves 2022-03-16 15:55 ` Andrew Burgess @ 2022-03-16 16:28 ` Tom Tromey 2022-03-17 15:42 ` Pedro Alves 2 siblings, 0 replies; 7+ messages in thread From: Tom Tromey @ 2022-03-16 16:28 UTC (permalink / raw) To: Pedro Alves; +Cc: Tom Tromey, gdb-patches Pedro> I think we should just drop the whole score port, though. See here, from 2014 (!): gdb has warped my perspective so much that my first thought was that this seems kind of recent. Pedro> Like so. Given this has been removed from GCC for so long, and we never heard Pedro> of anyone using the port or file a bug report about it all these years, I think Pedro> we can just go ahead and delete it without a deprecation period. Agreed. Tom ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] gdb: Remove support for S+core 2022-03-16 14:44 ` [PATCH] gdb: Remove support for S+core Pedro Alves 2022-03-16 15:55 ` Andrew Burgess 2022-03-16 16:28 ` Tom Tromey @ 2022-03-17 15:42 ` Pedro Alves 2 siblings, 0 replies; 7+ messages in thread From: Pedro Alves @ 2022-03-17 15:42 UTC (permalink / raw) To: Tom Tromey, gdb-patches, Andrew Burgess Thanks guys. FYI, I pushed this now. ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2022-03-17 15:42 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2022-03-15 22:31 [PATCH] Remove 'target_mach' global from score-tdep.c Tom Tromey 2022-03-16 11:38 ` Andrew Burgess 2022-03-16 12:07 ` Pedro Alves 2022-03-16 14:44 ` [PATCH] gdb: Remove support for S+core Pedro Alves 2022-03-16 15:55 ` Andrew Burgess 2022-03-16 16:28 ` Tom Tromey 2022-03-17 15:42 ` Pedro Alves
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