* [PATCH V4 1/1] Add backend support for C-SKY
2019-07-16 11:16 [PATCH V4 0/1] Add C-SKY support Mao Han
@ 2019-07-16 11:16 ` Mao Han
2019-07-16 13:48 ` [PATCH V4 0/1] Add C-SKY support Mark Wielaard
1 sibling, 0 replies; 5+ messages in thread
From: Mao Han @ 2019-07-16 11:16 UTC (permalink / raw)
To: mark; +Cc: elfutils-devel, Mao Han
C-SKY V2 ABI manual:
https://github.com/c-sky/csky-doc/blob/master/C-SKY_V2_CPU_Applications_Binary_Interface_Standards_Manual.pdf
C-SKY architecture user guide:
https://github.com/c-sky/csky-doc/blob/master/CSKY%20Architecture%20user_guide.pdf
Signed-off-by: Mao Han <han_mao@c-sky.com>
---
backends/ChangeLog | 12 ++++++
backends/Makefile.am | 9 ++++-
backends/csky_attrs.c | 67 +++++++++++++++++++++++++++++++
backends/csky_cfi.c | 60 ++++++++++++++++++++++++++++
backends/csky_corenote.c | 61 ++++++++++++++++++++++++++++
backends/csky_init.c | 65 ++++++++++++++++++++++++++++++
backends/csky_initreg.c | 87 ++++++++++++++++++++++++++++++++++++++++
backends/csky_regs.c | 101 +++++++++++++++++++++++++++++++++++++++++++++++
backends/csky_reloc.def | 86 ++++++++++++++++++++++++++++++++++++++++
backends/csky_symbol.c | 77 ++++++++++++++++++++++++++++++++++++
libebl/ChangeLog | 4 ++
libebl/eblopenbackend.c | 1 +
src/ChangeLog | 4 ++
src/elflint.c | 2 +-
src/readelf.c | 4 +-
tests/ChangeLog | 7 ++++
tests/hello_csky.ko.bz2 | Bin 0 -> 26448 bytes
tests/run-addrcfi.sh | 43 ++++++++++++++++++++
tests/run-strip-reloc.sh | 3 +-
tests/testfilecsky.bz2 | Bin 0 -> 3145 bytes
20 files changed, 688 insertions(+), 5 deletions(-)
create mode 100644 backends/csky_attrs.c
create mode 100644 backends/csky_cfi.c
create mode 100644 backends/csky_corenote.c
create mode 100644 backends/csky_init.c
create mode 100644 backends/csky_initreg.c
create mode 100644 backends/csky_regs.c
create mode 100644 backends/csky_reloc.def
create mode 100644 backends/csky_symbol.c
create mode 100644 tests/hello_csky.ko.bz2
create mode 100644 tests/testfilecsky.bz2
diff --git a/backends/ChangeLog b/backends/ChangeLog
index af1a40e..f1eaf14 100644
--- a/backends/ChangeLog
+++ b/backends/ChangeLog
@@ -1,3 +1,15 @@
+2019-07-13 Mao Han <han_mao@c-sky.com>
+
+ * Makefile.am: Add C-SKY.
+ * csky_attrs.c: New file.
+ * csky_cfi.c: New file.
+ * csky_corenote.c: Likewise.
+ * csky_init.c: Likewise.
+ * csky_initreg.c: Likewise.
+ * csky_regs.c: Likewise.
+ * csky_reloc.def: Likewise.
+ * csky_symbol.c: Likewise.
+
2019-06-28 Mark Wielaard <mark@klomp.org>
* aarch64_init.c (aarch64_init.c): Remove eh->name;
diff --git a/backends/Makefile.am b/backends/Makefile.am
index 2126a2e..175468f 100644
--- a/backends/Makefile.am
+++ b/backends/Makefile.am
@@ -33,12 +33,13 @@ AM_CPPFLAGS += -I$(top_srcdir)/libebl -I$(top_srcdir)/libasm \
modules = i386 sh x86_64 ia64 alpha arm aarch64 sparc ppc ppc64 s390 \
- tilegx m68k bpf riscv
+ tilegx m68k bpf riscv csky
libebl_pic = libebl_i386_pic.a libebl_sh_pic.a libebl_x86_64_pic.a \
libebl_ia64_pic.a libebl_alpha_pic.a libebl_arm_pic.a \
libebl_aarch64_pic.a libebl_sparc_pic.a libebl_ppc_pic.a \
libebl_ppc64_pic.a libebl_s390_pic.a libebl_tilegx_pic.a \
- libebl_m68k_pic.a libebl_bpf_pic.a libebl_riscv_pic.a
+ libebl_m68k_pic.a libebl_bpf_pic.a libebl_riscv_pic.a \
+ libebl_csky_pic.a
noinst_LIBRARIES = $(libebl_pic)
noinst_DATA = $(libebl_pic:_pic.a=.so)
@@ -136,6 +137,10 @@ riscv_SRCS = riscv_init.c riscv_symbol.c riscv_cfi.c riscv_regs.c \
libebl_riscv_pic_a_SOURCES = $(riscv_SRCS)
am_libebl_riscv_pic_a_OBJECTS = $(riscv_SRCS:.c=.os)
+csky_SRCS = csky_attrs.c csky_init.c csky_symbol.c csky_cfi.c \
+ csky_regs.c csky_initreg.c csky_corenote.c
+libebl_csky_pic_a_SOURCES = $(csky_SRCS)
+am_libebl_csky_pic_a_OBJECTS = $(csky_SRCS:.c=.os)
libebl_%.so libebl_%.map: libebl_%_pic.a $(libelf) $(libdw) $(libeu)
@rm -f $(@:.so=.map)
diff --git a/backends/csky_attrs.c b/backends/csky_attrs.c
new file mode 100644
index 0000000..9b236f1
--- /dev/null
+++ b/backends/csky_attrs.c
@@ -0,0 +1,67 @@
+/* C-SKY ABI-specified defaults for DWARF CFI.
+ Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils 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 copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <string.h>
+#include <dwarf.h>
+
+#define BACKEND csky_
+#include "libebl_CPU.h"
+
+bool
+csky_check_object_attribute (Ebl *ebl __attribute__ ((unused)),
+ const char *vendor, int tag,
+ uint64_t value __attribute__ ((unused)),
+ const char **tag_name,
+ const char **value_name __attribute__ ((unused)))
+{
+ if (!strcmp (vendor, "gnu"))
+ switch (tag)
+ {
+ case 4:
+ *tag_name = "CSKY_ARCH_NAME";
+ return true;
+
+ case 5:
+ *tag_name = "CSKY_CPU_NAME";
+ return true;
+
+ case 6:
+ *tag_name = "CSKY_ISA_FLAGS";
+ return true;
+
+ case 7:
+ *tag_name = "CSKY_ISA_EXT_FLAGS";
+ return true;
+ }
+
+ return false;
+}
diff --git a/backends/csky_cfi.c b/backends/csky_cfi.c
new file mode 100644
index 0000000..7277dbd
--- /dev/null
+++ b/backends/csky_cfi.c
@@ -0,0 +1,60 @@
+/* C-SKY ABI-specified defaults for DWARF CFI.
+ Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils 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 copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <dwarf.h>
+
+#define BACKEND csky_
+#include "libebl_CPU.h"
+
+
+int
+csky_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info)
+{
+ static const uint8_t abi_cfi[] =
+ {
+ DW_CFA_def_cfa, ULEB128_7 (14), ULEB128_7 (0),
+ DW_CFA_val_offset, ULEB128_7 (14), ULEB128_7 (0),
+
+#define SV(n) DW_CFA_same_value, ULEB128_7 (n)
+ SV(4), SV (5), SV (6), SV (7), SV (8), SV (9),
+ SV(10), SV (11), SV (15), SV (16), SV (17)
+#undef SV
+ };
+
+ abi_info->initial_instructions = abi_cfi;
+ abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi];
+ abi_info->data_alignment_factor = -4;
+
+ abi_info->return_address_register = 15; /* lr. */
+
+ return 0;
+}
diff --git a/backends/csky_corenote.c b/backends/csky_corenote.c
new file mode 100644
index 0000000..a1479bd
--- /dev/null
+++ b/backends/csky_corenote.c
@@ -0,0 +1,61 @@
+/* C-SKY specific core note handling.
+ Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils 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 copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <elf.h>
+#include <inttypes.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <sys/time.h>
+
+#define BACKEND csky_
+#include "libebl_CPU.h"
+
+#define ULONG uint32_t
+#define PID_T int32_t
+#define UID_T uint32_t
+#define GID_T uint32_t
+#define ALIGN_ULONG 4
+#define ALIGN_PID_T 4
+#define ALIGN_UID_T 4
+#define ALIGN_GID_T 4
+#define TYPE_ULONG ELF_T_WORD
+#define TYPE_PID_T ELF_T_SWORD
+#define TYPE_UID_T ELF_T_WORD
+#define TYPE_GID_T ELF_T_WORD
+
+static const Ebl_Register_Location prstatus_regs[] =
+ {
+ { .offset = 0, .regno = 0, .count = 36, .bits = 32 } /* r0..r31 */
+ };
+#define PRSTATUS_REGS_SIZE (36 * 4)
+
+#include "linux-core-note.c"
diff --git a/backends/csky_init.c b/backends/csky_init.c
new file mode 100644
index 0000000..b34a03a
--- /dev/null
+++ b/backends/csky_init.c
@@ -0,0 +1,65 @@
+/* Initialization of C-SKY specific backend library.
+ Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils 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 copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#define BACKEND csky_
+#define RELOC_PREFIX R_CKCORE_
+#include "libebl_CPU.h"
+
+/* This defines the common reloc hooks based on csky_reloc.def. */
+#include "common-reloc.c"
+
+const char *
+csky_init (Elf *elf __attribute__ ((unused)),
+ GElf_Half machine __attribute__ ((unused)),
+ Ebl *eh,
+ size_t ehlen)
+{
+ /* Check whether the Elf_BH object has a sufficent size. */
+ if (ehlen < sizeof (Ebl))
+ return NULL;
+
+ /* We handle it. */
+ csky_init_reloc (eh);
+ HOOK (eh, abi_cfi);
+ HOOK (eh, core_note);
+ HOOK (eh, check_object_attribute);
+ HOOK (eh, machine_flag_check);
+ HOOK (eh, reloc_simple_type);
+ HOOK (eh, register_info);
+ HOOK (eh, section_type_name);
+ HOOK (eh, set_initial_registers_tid);
+
+ /* gcc/config/ #define DWARF_FRAME_REGISTERS. */
+ eh->frame_nregs = 38;
+
+ return MODVERSION;
+}
diff --git a/backends/csky_initreg.c b/backends/csky_initreg.c
new file mode 100644
index 0000000..81a0da3
--- /dev/null
+++ b/backends/csky_initreg.c
@@ -0,0 +1,87 @@
+/* Fetch live process registers from TID. C-SKY version.
+ Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils 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 copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "system.h"
+#include <assert.h>
+#if defined __CSKY__ && defined __linux__
+# include <sys/uio.h>
+# include <sys/procfs.h>
+# include <sys/ptrace.h>
+#endif
+
+#define BACKEND csky_
+#include "libebl_CPU.h"
+
+bool
+csky_set_initial_registers_tid (pid_t tid __attribute__ ((unused)),
+ ebl_tid_registers_t *setfunc __attribute__ ((unused)),
+ void *arg __attribute__ ((unused)))
+{
+#if !defined __CSKY__ || !defined __linux__
+ return false;
+#else /* __CSKY__ */
+ struct pt_regs user_regs;
+ struct iovec iovec;
+ iovec.iov_base = &user_regs;
+ iovec.iov_len = sizeof (user_regs);
+ if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iovec) != 0)
+ return false;
+
+ Dwarf_Word dwarf_regs[38];
+
+ /* lr. */
+ dwarf_regs[15] = user_regs.lr;
+ /* sp. */
+ dwarf_regs[14] = user_regs.usp;
+ /* r0 ~ r13. */
+ dwarf_regs[0] = user_regs.a0;
+ dwarf_regs[1] = user_regs.a1;
+ dwarf_regs[2] = user_regs.a2;
+ dwarf_regs[3] = user_regs.a3;
+ for (int i = 4; i < 14; i++)
+ dwarf_regs[i] = user_regs.regs[i - 4];
+ /* r ~ r13. */
+ for (int i = 16; i < 31; i++)
+ dwarf_regs[i] = user_regs.exregs[i - 16];
+ /* tls. */
+ dwarf_regs[31] = user_regs.tls;
+ /* hi. */
+ dwarf_regs[36] = user_regs.rhi;
+ /* lo. */
+ dwarf_regs[37] = user_regs.rlo;
+ /* pc. */
+ dwarf_regs[32] = user_regs.pc;
+ setfunc (-1, 1, &dwarf_regs[32], arg);
+
+ return setfunc (0, 38, dwarf_regs, arg);
+#endif
+}
diff --git a/backends/csky_regs.c b/backends/csky_regs.c
new file mode 100644
index 0000000..6d45c04
--- /dev/null
+++ b/backends/csky_regs.c
@@ -0,0 +1,101 @@
+/* Register names and numbers for C-SKY DWARF.
+ Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils 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 copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <string.h>
+#include <dwarf.h>
+
+#define BACKEND csky_
+#include "libebl_CPU.h"
+
+ssize_t
+csky_register_info (Ebl *ebl __attribute__ ((unused)),
+ int regno, char *name, size_t namelen,
+ const char **prefix, const char **setname,
+ int *bits, int *type)
+{
+ if (name == NULL)
+ return 38;
+
+ *prefix = "";
+ *bits = 32;
+ *type = DW_ATE_signed;
+ *setname = "integer";
+
+ switch (regno)
+ {
+ case 0 ... 9:
+ name[0] = 'r';
+ name[1] = regno + '0';
+ namelen = 2;
+ break;
+
+ case 10 ... 13:
+ case 16 ... 30:
+ name[0] = 'r';
+ name[1] = regno / 10 + '0';
+ name[2] = regno % 10 + '0';
+ namelen = 3;
+ break;
+
+ case 14:
+ stpcpy (name, "sp");
+ namelen = 2;
+ break;
+
+ case 15:
+ stpcpy (name, "lr");
+ namelen = 2;
+ break;
+
+ case 31:
+ stpcpy (name, "tls");
+ namelen = 3;
+ break;
+
+ case 36:
+ stpcpy (name, "hi");
+ namelen = 2;
+ break;
+
+ case 37:
+ stpcpy (name, "lo");
+ namelen = 2;
+ break;
+
+ default:
+ *setname = NULL;
+ return 0;
+ }
+
+ name[namelen++] = '\0';
+ return namelen;
+}
diff --git a/backends/csky_reloc.def b/backends/csky_reloc.def
new file mode 100644
index 0000000..1108f0c
--- /dev/null
+++ b/backends/csky_reloc.def
@@ -0,0 +1,86 @@
+/* List the relocation types for csky. -*- C -*-
+ Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils 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 copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+/* NAME, REL|EXEC|DYN */
+
+
+RELOC_TYPE (NONE, REL|EXEC|DYN)
+RELOC_TYPE (ADDR32, REL|EXEC|DYN)
+RELOC_TYPE (PCRELIMM8BY4, REL)
+RELOC_TYPE (PCRELIMM11BY2, REL)
+RELOC_TYPE (PCREL32, REL|DYN)
+RELOC_TYPE (PCRELJSR_IMM11BY2, REL)
+RELOC_TYPE (RELATIVE, EXEC|DYN)
+RELOC_TYPE (COPY, EXEC|DYN)
+RELOC_TYPE (GLOB_DAT, EXEC|DYN)
+RELOC_TYPE (JUMP_SLOT, EXEC|DYN)
+RELOC_TYPE (GOTOFF, REL)
+RELOC_TYPE (GOTPC, REL)
+RELOC_TYPE (GOT32, REL)
+RELOC_TYPE (PLT32, REL)
+RELOC_TYPE (ADDRGOT, REL)
+RELOC_TYPE (ADDRPLT, REL)
+RELOC_TYPE (PCREL_IMM26BY2, REL)
+RELOC_TYPE (PCREL_IMM16BY2, REL)
+RELOC_TYPE (PCREL_IMM16BY4, REL)
+RELOC_TYPE (PCREL_IMM10BY2, REL)
+RELOC_TYPE (PCREL_IMM10BY4, REL)
+RELOC_TYPE (ADDR_HI16, REL|DYN)
+RELOC_TYPE (ADDR_LO16, REL|DYN)
+RELOC_TYPE (GOTPC_HI16, REL)
+RELOC_TYPE (GOTPC_LO16, REL)
+RELOC_TYPE (GOTOFF_HI16, REL)
+RELOC_TYPE (GOTOFF_LO16, REL)
+RELOC_TYPE (GOT12, REL)
+RELOC_TYPE (GOT_HI16, REL)
+RELOC_TYPE (GOT_LO16, REL)
+RELOC_TYPE (PLT12, REL)
+RELOC_TYPE (PLT_HI16, REL)
+RELOC_TYPE (PLT_LO16, REL)
+RELOC_TYPE (ADDRGOT_HI16, REL)
+RELOC_TYPE (ADDRGOT_LO16, REL)
+RELOC_TYPE (ADDRPLT_HI16, REL)
+RELOC_TYPE (ADDRPLT_LO16, REL)
+RELOC_TYPE (PCREL_JSR_IMM26BY2, REL|DYN)
+RELOC_TYPE (TOFFSET_LO16, REL)
+RELOC_TYPE (DOFFSET_LO16, REL)
+RELOC_TYPE (PCREL_IMM18BY2, REL)
+RELOC_TYPE (DOFFSET_IMM18, REL)
+RELOC_TYPE (DOFFSET_IMM18BY2, REL)
+RELOC_TYPE (DOFFSET_IMM18BY4, REL)
+RELOC_TYPE (GOT_IMM18BY4, REL)
+RELOC_TYPE (PLT_IMM18BY4, REL)
+RELOC_TYPE (PCREL_IMM7BY4, REL)
+RELOC_TYPE (TLS_LE32, REL)
+RELOC_TYPE (TLS_IE32, REL)
+RELOC_TYPE (TLS_GD32, REL)
+RELOC_TYPE (TLS_LDM32, REL)
+RELOC_TYPE (TLS_LDO32, REL)
+RELOC_TYPE (TLS_DTPMOD32, EXEC|DYN)
+RELOC_TYPE (TLS_DTPOFF32, EXEC|DYN)
+RELOC_TYPE (TLS_TPOFF32, EXEC|DYN)
diff --git a/backends/csky_symbol.c b/backends/csky_symbol.c
new file mode 100644
index 0000000..79b5bf9
--- /dev/null
+++ b/backends/csky_symbol.c
@@ -0,0 +1,77 @@
+/* C-SKY specific symbolic name handling.
+ Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils 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 copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <assert.h>
+#include <elf.h>
+#include <stddef.h>
+#include <string.h>
+
+#define BACKEND csky_
+#include "libebl_CPU.h"
+
+/* Check for the simple reloc types. */
+Elf_Type
+csky_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type,
+ int *addsub __attribute__ ((unused)))
+{
+ switch (type)
+ {
+ case R_CKCORE_ADDR32:
+ return ELF_T_WORD;
+ default:
+ return ELF_T_NUM;
+ }
+}
+
+bool
+csky_machine_flag_check (GElf_Word flags)
+{
+ switch (flags & EF_CSKY_ABIMASK)
+ {
+ case EF_CSKY_ABIV2:
+ return true;
+ case EF_CSKY_ABIV1:
+ default:
+ return false;
+ }
+}
+
+const char *
+csky_section_type_name (int type,
+ char *buf __attribute__ ((unused)),
+ size_t len __attribute__ ((unused)))
+{
+ if (type == SHT_CSKY_ATTRIBUTES)
+ return "CSKY_ATTRIBUTES";
+
+ return NULL;
+}
diff --git a/libebl/ChangeLog b/libebl/ChangeLog
index e42cd34..bb91c15 100644
--- a/libebl/ChangeLog
+++ b/libebl/ChangeLog
@@ -1,3 +1,7 @@
+2019-04-29 Mao Han <han_mao@c-sky.com>
+
+ * eblopenbackend.c: Add C-SKY.
+
2019-06-28 Mark Wielaard <mark@klomp.org>
* eblopenbackend.c (try_dlopen): Remove result->name check.
diff --git a/libebl/eblopenbackend.c b/libebl/eblopenbackend.c
index 9dd5195..01711f5 100644
--- a/libebl/eblopenbackend.c
+++ b/libebl/eblopenbackend.c
@@ -135,6 +135,7 @@ static const struct
{ "bpf", "elf_bpf", "bpf", 3, EM_BPF, 0, 0 },
{ "riscv", "elf_riscv", "riscv", 5, EM_RISCV, ELFCLASS64, ELFDATA2LSB },
{ "riscv", "elf_riscv", "riscv", 5, EM_RISCV, ELFCLASS32, ELFDATA2LSB },
+ { "csky", "elf_csky", "csky", 4, EM_CSKY, ELFCLASS32, ELFDATA2LSB },
};
#define nmachines (sizeof (machines) / sizeof (machines[0]))
diff --git a/src/ChangeLog b/src/ChangeLog
index 27812b0..911ad26 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,7 @@
+2019-07-13 Mao Han <han_mao@c-sky.com>
+
+ * elflint.c: Add C-SKY.
+
2019-06-28 Mark Wielaard <mark@klomp.org>
* readelf.c (print_ehdr): Use dwelf_elf_e_machine_string instead of
diff --git a/src/elflint.c b/src/elflint.c
index 810c8bd..edb466d 100644
--- a/src/elflint.c
+++ b/src/elflint.c
@@ -330,7 +330,7 @@ static const int valid_e_machine[] =
EM_CRIS, EM_JAVELIN, EM_FIREPATH, EM_ZSP, EM_MMIX, EM_HUANY, EM_PRISM,
EM_AVR, EM_FR30, EM_D10V, EM_D30V, EM_V850, EM_M32R, EM_MN10300,
EM_MN10200, EM_PJ, EM_OPENRISC, EM_ARC_A5, EM_XTENSA, EM_ALPHA,
- EM_TILEGX, EM_TILEPRO, EM_AARCH64, EM_BPF, EM_RISCV
+ EM_TILEGX, EM_TILEPRO, EM_AARCH64, EM_BPF, EM_RISCV, EM_CSKY
};
#define nvalid_e_machine \
(sizeof (valid_e_machine) / sizeof (valid_e_machine[0]))
diff --git a/src/readelf.c b/src/readelf.c
index cda7c93..2084fb1 100644
--- a/src/readelf.c
+++ b/src/readelf.c
@@ -3571,7 +3571,9 @@ print_attributes (Ebl *ebl, const GElf_Ehdr *ehdr)
if (shdr == NULL || (shdr->sh_type != SHT_GNU_ATTRIBUTES
&& (shdr->sh_type != SHT_ARM_ATTRIBUTES
- || ehdr->e_machine != EM_ARM)))
+ || ehdr->e_machine != EM_ARM)
+ && (shdr->sh_type != SHT_CSKY_ATTRIBUTES
+ || ehdr->e_machine != EM_CSKY)))
continue;
printf (gettext ("\
diff --git a/tests/ChangeLog b/tests/ChangeLog
index 8162185..05910ab 100644
--- a/tests/ChangeLog
+++ b/tests/ChangeLog
@@ -1,3 +1,10 @@
+2019-07-16 Mao Han <han_mao@c-sky.com>
+
+ * hello_csky.ko.bz2: New testfile.
+ * run-addrcfi.sh: Add C-SKY testfile.
+ * run-strip-reloc.sh: Likewise.
+ * testfilecsky.bz2: New testfile.
+
2019-06-28 Mark Wielaard <mark@klomp.org>
* Makefile.am (check_PROGRAMS): Add dwelf_elf_e_machine_string.
diff --git a/tests/hello_csky.ko.bz2 b/tests/hello_csky.ko.bz2
new file mode 100644
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literal 0
HcmV?d00001
diff --git a/tests/run-addrcfi.sh b/tests/run-addrcfi.sh
index fd89d02..64fa24d 100755
--- a/tests/run-addrcfi.sh
+++ b/tests/run-addrcfi.sh
@@ -3747,3 +3747,46 @@ testrun_compare ${abs_builddir}/addrcfi -e testfile-x32 0x00400390 <<\EOF
control reg66 (%fsw): undefined
handle_cfi no CFI (.debug_frame): no error
EOF
+
+# EM_CSKY (function bar 0x8440)
+testfiles testfilecsky
+testrun_compare ${abs_builddir}/addrcfi -e testfilecsky 0x8440 <<\EOF
+dwarf_cfi_addrframe (.eh_frame): no matching address range
+.debug_frame has 0x8440 => [0x8440, 0x844a):
+ return address in reg15
+ CFA location expression: bregx(14)
+ integer reg0 (r0): undefined
+ integer reg1 (r1): undefined
+ integer reg2 (r2): undefined
+ integer reg3 (r3): undefined
+ integer reg4 (r4): same_value
+ integer reg5 (r5): same_value
+ integer reg6 (r6): same_value
+ integer reg7 (r7): same_value
+ integer reg8 (r8): same_value
+ integer reg9 (r9): same_value
+ integer reg10 (r10): same_value
+ integer reg11 (r11): same_value
+ integer reg12 (r12): undefined
+ integer reg13 (r13): undefined
+ integer reg14 (sp): location expression: call_frame_cfa stack_value
+ integer reg15 (lr): same_value
+ integer reg16 (r16): same_value
+ integer reg17 (r17): same_value
+ integer reg18 (r18): undefined
+ integer reg19 (r19): undefined
+ integer reg20 (r20): undefined
+ integer reg21 (r21): undefined
+ integer reg22 (r22): undefined
+ integer reg23 (r23): undefined
+ integer reg24 (r24): undefined
+ integer reg25 (r25): undefined
+ integer reg26 (r26): undefined
+ integer reg27 (r27): undefined
+ integer reg28 (r28): undefined
+ integer reg29 (r29): undefined
+ integer reg30 (r30): undefined
+ integer reg31 (tls): undefined
+ integer reg36 (hi): undefined
+ integer reg37 (lo): undefined
+EOF
diff --git a/tests/run-strip-reloc.sh b/tests/run-strip-reloc.sh
index 0c6b1c2..b7ec142 100755
--- a/tests/run-strip-reloc.sh
+++ b/tests/run-strip-reloc.sh
@@ -18,7 +18,7 @@
. $srcdir/test-subr.sh
testfiles hello_i386.ko hello_x86_64.ko hello_ppc64.ko hello_s390.ko \
- hello_aarch64.ko hello_m68k.ko hello_riscv64.ko
+ hello_aarch64.ko hello_m68k.ko hello_riscv64.ko hello_csky.ko
tempfiles readelf.out readelf.out1 readelf.out2
tempfiles out.stripped1 out.debug1 out.stripped2 out.debug2
@@ -119,6 +119,7 @@ runtest hello_s390.ko 1
runtest hello_aarch64.ko 1
runtest hello_m68k.ko 1
runtest hello_riscv64.ko 1
+runtest hello_csky.ko 1
# self test, shouldn't impact non-ET_REL files at all.
runtest ${abs_top_builddir}/src/strip 0
diff --git a/tests/testfilecsky.bz2 b/tests/testfilecsky.bz2
new file mode 100644
index 0000000000000000000000000000000000000000..dfee449e7d6e767f32667a40b0d6f910741c54c9
GIT binary patch
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a#uzKS*^awNY2-W7T%lhnQB2a1`SM>rgqz&}
literal 0
HcmV?d00001
--
2.7.4
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH V4 0/1] Add C-SKY support
@ 2019-07-16 11:16 Mao Han
2019-07-16 11:16 ` [PATCH V4 1/1] Add backend support for C-SKY Mao Han
2019-07-16 13:48 ` [PATCH V4 0/1] Add C-SKY support Mark Wielaard
0 siblings, 2 replies; 5+ messages in thread
From: Mao Han @ 2019-07-16 11:16 UTC (permalink / raw)
To: mark; +Cc: elfutils-devel, Mao Han
> > The ELF_ARCH was defined as 39 inside linux kernel(before 4.20), so
> > the the core file generated was EM_RCE.
> > I'v regenerated the core file with ELF_ARCH defined as 252:
> > https://github.com/c-sky/test-result/blob/master/elfutils/zeroptr
> > https://github.com/c-sky/test-result/raw/master/elfutils/core.zeroptr
> > We have extended our core dump reg set last year, linux kernel have
> > upstreamed this change, but the gdb does not. I'v only got an old
> > released toolchain(EM_RCE) and the upstream toolchain(out of date
> > reg set) in my enviroment, so I can't generate/verify EM_CSKY core
> > file with any toolchain I have.
>
> So the zeroptr binary looks correct now.
> But the core.zeroptr is probably generated by an older linux kernel and
> still is EM_RCE. This confusion is a bit confusing since I makes it
> really hard to check the details (register numbering, etc.) are really
> correct. I can tweak the code a bit to accept EM_RCE as EM_CSKY but
> then the PRSTATUS core note doesn't look correct. I am not sure that is
> because the register set as dumped by the kernel is bogus or because
> the prstatus_regs definition in csky_corenote.c is incorrect.
vmh@vmh-VirtualBox:~/workspace/test-result/elfutils$ file core.zeroptr
core.zeroptr: ELF 32-bit LSB core file *unknown arch 0xfc* version 1 (SYSV), SVR4-style, from 'root/zeroptr'
The core.zeroptr should be EM_CSKY now. I've tested the core file with
non-public released toolchain with EM_CSKY(the upstream gdb don't
support csky coredump). GPR seems loaded correctly. I think the
prstatus_regs have the correct reg size (36 * 4), problem may come
from the coredump regs->dwarf regs mapping(the mapping and coredump
support for binutil is not upsteamed).
https://github.com/c-sky/binutils-gdb/blob/fecb9cfcf9ac6e43ec2d971ce064fbb2dccb0847/gdb/csky-tdep.c:
/* Offset mapping table from core_section to regcache of general
registers for ck810. */
static int csky_gregset_offset_v2[] =
{
72, 1, 0, 89, 2, /* pc, r1, r0, psr, r2. */
3, 4, 5, 6, 7, /* r3 ~ r32. */
8, 9, 10, 11, 12,
13, 14, 15, 16, 17,
18, 19, 20, 21, 22,
23, 24, 25, 26, 27,
28, 29, 30, 31
};
/home/vmh/workspace/buildroot2/buildroot/output/host/bin/csky-linux-gdb zeroptr
/home/vmh/workspace/buildroot2/buildroot/output/host/bin/csky-linux-gdb: warning: A handler for the OS ABI "GNU/Linux" is not built into this configuration
of GDB. Attempting to continue with the default csky settings.
GNU gdb (GDB) 7.12
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=x86_64-pc-linux-gnu --target=csky-buildroot-linux-gnuabiv2".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
warning: A handler for the OS ABI "GNU/Linux" is not built into this configuration
of GDB. Attempting to continue with the default csky settings.
Reading symbols from zeroptr...done.
(cskygdb) core-file core.zeroptr
[New process 143]
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00000000 in ?? ()
(cskygdb) i r
r0 0x1 1
r1 0x7fbbce24 2143014436
r2 0x0 0
r3 0x0 0
r4 0xc4430 803888
r5 0x0 0
r6 0x0 0
r7 0x8bfc 35836
r8 0x7fbbcd50 2143014224
r9 0xc4430 803888
r10 0xc43ec 803820
r11 0xc4190 803216
r12 0xf946246b -112843669
r13 0x1b81c 112668
r14 0x7fbbcd4c 0x7fbbcd4c
r15 0x8656 34390
r16 0xc443c 803900
r17 0xffffffff -1
r18 0x67180 422272
r19 0xffffffff -1
r20 0x2f2f2f2f 791621423
r21 0x0 0
r22 0x1000 4096
r23 0x0 0
r24 0x0 0
r25 0x663ac 418732
r26 0x2ab56f50 716533584
r27 0x0 0
r28 0x2abecbd8 717147096
r29 0x0 0
r30 0x0 0
r31 0x68478 427128
pc 0x0 0x0
epc <unavailable>
psr 0x140340 1311552
epsr <unavailable>
> > These attributes including cpu name and some other ISA related
> > descriptions.
> > Some thing like:
> > CSKY_ARCH_NAME: "ck810"
> > CSKY_CPU_NAME: "ck810f"
> > CSKY_ISA_FLAG: 0x12345678
> > CSKY_ISA_EXT_FLAG: 5
> > They are not documented yet.
> > I'v ask the person who is responsible for these to update the ABI
> > documents, but I think it will take a quite long time for them to
> > do that. They are quite busy at present.
>
> OK. If you can add that tweak to src/readelf.c and add an
> check_object_attribute hook that handles the above attributes that
> would be good.
>
> Ideally you also add a testcase for tests/readelf-A.sh
> Some of those tests cheat and create the attributes by hand.
> But it would be nice if you could generate a small .o file with the
> latest toolchain to be used as testcase in some other tests.
I'm not sure about how to handle different data type here. It seems
only tag_name is required when data type is string, I could not
found how to handle int here.
The binary with csky.attribute currently can not be generate with public
released toolchain, so I don't know how to add the testcase.
Tested on x86
============================================================================
Testsuite summary for elfutils 0.176
============================================================================
# TOTAL: 209
# PASS: 204
# SKIP: 5
# XFAIL: 0
# FAIL: 0
# XPASS: 0
# ERROR: 0
============================================================================
Changes since v1:
- Add the Signed-off-by line and the copyright
Changes since v2:
- move changelog to corresponding entries
- correct core dump registers size
- remove unused fpu DWARF register
Changes since v3:
- add testfilecsky.bz2 and hello_csky.ko.bz2
- add csky_check_object_attribute
Mao Han (1):
Add backend support for C-SKY
backends/ChangeLog | 12 ++++++
backends/Makefile.am | 9 ++++-
backends/csky_attrs.c | 67 +++++++++++++++++++++++++++++++
backends/csky_cfi.c | 60 ++++++++++++++++++++++++++++
backends/csky_corenote.c | 61 ++++++++++++++++++++++++++++
backends/csky_init.c | 65 ++++++++++++++++++++++++++++++
backends/csky_initreg.c | 87 ++++++++++++++++++++++++++++++++++++++++
backends/csky_regs.c | 101 +++++++++++++++++++++++++++++++++++++++++++++++
backends/csky_reloc.def | 86 ++++++++++++++++++++++++++++++++++++++++
backends/csky_symbol.c | 77 ++++++++++++++++++++++++++++++++++++
libebl/ChangeLog | 4 ++
libebl/eblopenbackend.c | 1 +
src/ChangeLog | 4 ++
src/elflint.c | 2 +-
src/readelf.c | 4 +-
tests/ChangeLog | 7 ++++
tests/hello_csky.ko.bz2 | Bin 0 -> 26448 bytes
tests/run-addrcfi.sh | 43 ++++++++++++++++++++
tests/run-strip-reloc.sh | 3 +-
tests/testfilecsky.bz2 | Bin 0 -> 3145 bytes
20 files changed, 688 insertions(+), 5 deletions(-)
create mode 100644 backends/csky_attrs.c
create mode 100644 backends/csky_cfi.c
create mode 100644 backends/csky_corenote.c
create mode 100644 backends/csky_init.c
create mode 100644 backends/csky_initreg.c
create mode 100644 backends/csky_regs.c
create mode 100644 backends/csky_reloc.def
create mode 100644 backends/csky_symbol.c
create mode 100644 tests/hello_csky.ko.bz2
create mode 100644 tests/testfilecsky.bz2
--
2.7.4
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH V4 0/1] Add C-SKY support
2019-07-16 11:16 [PATCH V4 0/1] Add C-SKY support Mao Han
2019-07-16 11:16 ` [PATCH V4 1/1] Add backend support for C-SKY Mao Han
@ 2019-07-16 13:48 ` Mark Wielaard
2019-07-17 1:21 ` Mao Han
1 sibling, 1 reply; 5+ messages in thread
From: Mark Wielaard @ 2019-07-16 13:48 UTC (permalink / raw)
To: Mao Han; +Cc: elfutils-devel
On Tue, 2019-07-16 at 19:14 +0800, Mao Han wrote:
> > > The ELF_ARCH was defined as 39 inside linux kernel(before 4.20),
> > > so
> > > the the core file generated was EM_RCE.
> > > I'v regenerated the core file with ELF_ARCH defined as 252:
> > > https://github.com/c-sky/test-result/blob/master/elfutils/zeroptr
> > >
https://github.com/c-sky/test-result/raw/master/elfutils/core.zeroptr
> > > We have extended our core dump reg set last year, linux kernel
> > > have
> > > upstreamed this change, but the gdb does not. I'v only got an old
> > > released toolchain(EM_RCE) and the upstream toolchain(out of date
> > > reg set) in my enviroment, so I can't generate/verify EM_CSKY
> > > core
> > > file with any toolchain I have.
> >
> > So the zeroptr binary looks correct now.
> > But the core.zeroptr is probably generated by an older linux kernel
> > and
> > still is EM_RCE. This confusion is a bit confusing since I makes it
> > really hard to check the details (register numbering, etc.) are
> > really
> > correct. I can tweak the code a bit to accept EM_RCE as EM_CSKY but
> > then the PRSTATUS core note doesn't look correct. I am not sure
> > that is
> > because the register set as dumped by the kernel is bogus or
> > because
> > the prstatus_regs definition in csky_corenote.c is incorrect.
>
> vmh@vmh-VirtualBox:~/workspace/test-result/elfutils$ file
> core.zeroptr
> core.zeroptr: ELF 32-bit LSB core file *unknown arch 0xfc* version 1
> (SYSV), SVR4-style, from 'root/zeroptr'
>
> The core.zeroptr should be EM_CSKY now. I've tested the core file
> with
> non-public released toolchain with EM_CSKY(the upstream gdb don't
> support csky coredump). GPR seems loaded correctly. I think the
> prstatus_regs have the correct reg size (36 * 4), problem may come
> from the coredump regs->dwarf regs mapping(the mapping and coredump
> support for binutil is not upsteamed).
You are right. Things look a little garbled because we use
ebl_register_info () and the hook to get the names and types for the
register numbers in various places. But ebl_register_info assumes DWARF
register numbers. We do have ebl_dwarf_to_regno, but we really also
need ebl_regno_to_dwarf. But we don't have it and we should audit the
code to make sure it is used in all the right places.
We have been going over this new backend for a while now. I think the
register mapping are slightly unique in this case (ppc has some
oddness, but we hacked around it without proper hooks...). Lets decide
to tackle this after the release, when we are going to update the ebl
backends anyway. Hopefully by then the rest of the toolchain has been
updated too to the C-SKY ABIv2 making creating testcases easier.
> > > These attributes including cpu name and some other ISA related
> > > descriptions.
> > > Some thing like:
> > > CSKY_ARCH_NAME: "ck810"
> > > CSKY_CPU_NAME: "ck810f"
> > > CSKY_ISA_FLAG: 0x12345678
> > > CSKY_ISA_EXT_FLAG: 5
> > > They are not documented yet.
> > > I'v ask the person who is responsible for these to update the ABI
> > > documents, but I think it will take a quite long time for them to
> > > do that. They are quite busy at present.
> >
> > OK. If you can add that tweak to src/readelf.c and add an
> > check_object_attribute hook that handles the above attributes that
> > would be good.
> >
> > Ideally you also add a testcase for tests/readelf-A.sh
> > Some of those tests cheat and create the attributes by hand.
> > But it would be nice if you could generate a small .o file with the
> > latest toolchain to be used as testcase in some other tests.
>
> I'm not sure about how to handle different data type here. It seems
> only tag_name is required when data type is string, I could not
> found how to handle int here.
> The binary with csky.attribute currently can not be generate with
> public
> released toolchain, so I don't know how to add the testcase.
OK, lets add a testcase once this has gone upstream in the rest of the
toolchain. Good point about the tag representing a string or number.
But I think this is (accidentially) handled correctly already. See this
comment in readelf.c (print_attributes):
/* GNU style tags have either a uleb128 value,
when lowest bit is not set, or a string
when the lowest bit is set.
"compatibility" (32) is special. It has
both a string and a uleb128 value. For
non-gnu we assume 6 till 31 only take ints.
XXX see arm backend, do we need a separate
hook? */
We probably need another hook one day, but it looks like csky follows
this assumption (4 and 5 are strings, 6 and 7 are numbers).
There is one bug in the implementation though. The vendor check is
wrong, checks for "gnu", should obviously be "csky":
diff --git a/backends/csky_attrs.c b/backends/csky_attrs.c
index 9b236f1c..177f0ba2 100644
--- a/backends/csky_attrs.c
+++ b/backends/csky_attrs.c
@@ -43,7 +43,7 @@ csky_check_object_attribute (Ebl *ebl __attribute__ ((unused)),
const char **tag_name,
const char **value_name __attribute__ ((unused)))
{
- if (!strcmp (vendor, "gnu"))
+ if (!strcmp (vendor, "csky"))
switch (tag)
{
case 4:
> Tested on x86
> ============================================================================
> Testsuite summary for elfutils 0.176
> ============================================================================
> # TOTAL: 209
> # PASS: 204
> # SKIP: 5
> # XFAIL: 0
> # FAIL: 0
> # XPASS: 0
> # ERROR: 0
> ============================================================================
>
> Changes since v1:
> - Add the Signed-off-by line and the copyright
>
> Changes since v2:
> - move changelog to corresponding entries
> - correct core dump registers size
> - remove unused fpu DWARF register
>
> Changes since v3:
> - add testfilecsky.bz2 and hello_csky.ko.bz2
> - add csky_check_object_attribute
>
> Mao Han (1):
> Add backend support for C-SKY
The new patch looks really good. Thanks. The addition of the testcases
really helps showing things look good. I can make that one small fix
s/gnu/csky/ in csky_attrs.c if you agree that is what was intended.
Then I'll push it to master.
And after the next release we can add some more testcases and handle to
register mappings more correctly.
Thanks,
Mark
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH V4 0/1] Add C-SKY support
2019-07-16 13:48 ` [PATCH V4 0/1] Add C-SKY support Mark Wielaard
@ 2019-07-17 1:21 ` Mao Han
2019-07-17 10:00 ` Mark Wielaard
0 siblings, 1 reply; 5+ messages in thread
From: Mao Han @ 2019-07-17 1:21 UTC (permalink / raw)
To: Mark Wielaard; +Cc: elfutils-devel
On Tue, Jul 16, 2019 at 03:48:22PM +0200, Mark Wielaard wrote:
> > > > These attributes including cpu name and some other ISA related
> > > > descriptions.
> > > > Some thing like:
> > > > CSKY_ARCH_NAME: "ck810"
> > > > CSKY_CPU_NAME: "ck810f"
> > > > CSKY_ISA_FLAG: 0x12345678
> > > > CSKY_ISA_EXT_FLAG: 5
> > > > They are not documented yet.
> > > > I'v ask the person who is responsible for these to update the ABI
> > > > documents, but I think it will take a quite long time for them to
> > > > do that. They are quite busy at present.
> > >
> > > OK. If you can add that tweak to src/readelf.c and add an
> > > check_object_attribute hook that handles the above attributes that
> > > would be good.
> > >
> > > Ideally you also add a testcase for tests/readelf-A.sh
> > > Some of those tests cheat and create the attributes by hand.
> > > But it would be nice if you could generate a small .o file with the
> > > latest toolchain to be used as testcase in some other tests.
> >
> > I'm not sure about how to handle different data type here. It seems
> > only tag_name is required when data type is string, I could not
> > found how to handle int here.
> > The binary with csky.attribute currently can not be generate with
> > public
> > released toolchain, so I don't know how to add the testcase.
>
> OK, lets add a testcase once this has gone upstream in the rest of the
> toolchain. Good point about the tag representing a string or number.
> But I think this is (accidentially) handled correctly already. See this
> comment in readelf.c (print_attributes):
>
> /* GNU style tags have either a uleb128 value,
> when lowest bit is not set, or a string
> when the lowest bit is set.
> "compatibility" (32) is special. It has
> both a string and a uleb128 value. For
> non-gnu we assume 6 till 31 only take ints.
> XXX see arm backend, do we need a separate
> hook? */
>
> We probably need another hook one day, but it looks like csky follows
> this assumption (4 and 5 are strings, 6 and 7 are numbers).
Yes, csky follows this assumption, so it is handled correctly already.
> There is one bug in the implementation though. The vendor check is
> wrong, checks for "gnu", should obviously be "csky":
>
> diff --git a/backends/csky_attrs.c b/backends/csky_attrs.c
> index 9b236f1c..177f0ba2 100644
> --- a/backends/csky_attrs.c
> +++ b/backends/csky_attrs.c
> @@ -43,7 +43,7 @@ csky_check_object_attribute (Ebl *ebl __attribute__ ((unused)),
> const char **tag_name,
> const char **value_name __attribute__ ((unused)))
> {
> - if (!strcmp (vendor, "gnu"))
> + if (!strcmp (vendor, "csky"))
> switch (tag)
> {
> case 4:
>
> > Tested on x86
> > ============================================================================
> > Testsuite summary for elfutils 0.176
> > ============================================================================
> > # TOTAL: 209
> > # PASS: 204
> > # SKIP: 5
> > # XFAIL: 0
> > # FAIL: 0
> > # XPASS: 0
> > # ERROR: 0
> > ============================================================================
> >
> > Changes since v1:
> > - Add the Signed-off-by line and the copyright
> >
> > Changes since v2:
> > - move changelog to corresponding entries
> > - correct core dump registers size
> > - remove unused fpu DWARF register
> >
> > Changes since v3:
> > - add testfilecsky.bz2 and hello_csky.ko.bz2
> > - add csky_check_object_attribute
> >
> > Mao Han (1):
> > Add backend support for C-SKY
>
> The new patch looks really good. Thanks. The addition of the testcases
> really helps showing things look good. I can make that one small fix
> s/gnu/csky/ in csky_attrs.c if you agree that is what was intended.
> Then I'll push it to master.
Yes, please. Thanks for your review and help improveing the patch.
> And after the next release we can add some more testcases and handle to
> register mappings more correctly.
OK.
Thanks,
Mao Han
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH V4 0/1] Add C-SKY support
2019-07-17 1:21 ` Mao Han
@ 2019-07-17 10:00 ` Mark Wielaard
0 siblings, 0 replies; 5+ messages in thread
From: Mark Wielaard @ 2019-07-17 10:00 UTC (permalink / raw)
To: Mao Han; +Cc: elfutils-devel
Hi Mao Han,
On Wed, 2019-07-17 at 09:19 +0800, Mao Han wrote:
> > The new patch looks really good. Thanks. The addition of the testcases
> > really helps showing things look good. I can make that one small fix
> > s/gnu/csky/ in csky_attrs.c if you agree that is what was intended.
> > Then I'll push it to master.
>
> Yes, please. Thanks for your review and help improveing the patch.
Pushed (with one small tweak, added the new test bz2 files to
EXTRA_DIST so they will also be in any release tar balls).
Thanks,
Mark
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2019-07-17 10:00 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-07-16 11:16 [PATCH V4 0/1] Add C-SKY support Mao Han
2019-07-16 11:16 ` [PATCH V4 1/1] Add backend support for C-SKY Mao Han
2019-07-16 13:48 ` [PATCH V4 0/1] Add C-SKY support Mark Wielaard
2019-07-17 1:21 ` Mao Han
2019-07-17 10:00 ` Mark Wielaard
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