From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 7873) id 53BD03864858; Wed, 6 Apr 2022 14:35:08 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 53BD03864858 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable From: Tiezhu Yang To: gdb-cvs@sourceware.org Subject: [binutils-gdb] gdb: LoongArch: prepend tramp frame unwinder for signal X-Act-Checkin: binutils-gdb X-Git-Author: Tiezhu Yang X-Git-Refname: refs/heads/master X-Git-Oldrev: 9716aa0a271cf59fb40194440ea6e2a0cf8ab192 X-Git-Newrev: 7fb56b98937a2feef5a3e12d8b00506ff4d132be Message-Id: <20220406143508.53BD03864858@sourceware.org> Date: Wed, 6 Apr 2022 14:35:08 +0000 (GMT) X-BeenThere: gdb-cvs@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-cvs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Apr 2022 14:35:08 -0000 https://sourceware.org/git/gitweb.cgi?p=3Dbinutils-gdb.git;h=3D7fb56b98937a= 2feef5a3e12d8b00506ff4d132be commit 7fb56b98937a2feef5a3e12d8b00506ff4d132be Author: Tiezhu Yang Date: Thu Mar 31 19:56:51 2022 +0800 gdb: LoongArch: prepend tramp frame unwinder for signal =20 Implement the "init" method of struct tramp_frame to prepend tramp frame unwinder for signal on LoongArch. =20 With this patch, the following failed testcases can be fixed: =20 FAIL: gdb.base/annota1.exp: backtrace @ signal handler (timeout) FAIL: gdb.base/annota3.exp: backtrace @ signal handler (pattern 2) =20 Signed-off-by: Tiezhu Yang Diff: --- gdb/loongarch-linux-tdep.c | 50 ++++++++++++++++++++++++++++++++++++++++++= ++++ 1 file changed, 50 insertions(+) diff --git a/gdb/loongarch-linux-tdep.c b/gdb/loongarch-linux-tdep.c index 6c040c3c385..7e219c4b9a0 100644 --- a/gdb/loongarch-linux-tdep.c +++ b/gdb/loongarch-linux-tdep.c @@ -25,6 +25,8 @@ #include "loongarch-tdep.h" #include "solib-svr4.h" #include "target-descriptions.h" +#include "trad-frame.h" +#include "tramp-frame.h" =20 /* Unpack an elf_gregset_t into GDB's register cache. */ =20 @@ -117,6 +119,50 @@ const struct regset loongarch_gregset =3D loongarch_fill_gregset, }; =20 +/* Implement the "init" method of struct tramp_frame. */ + +#define LOONGARCH_RT_SIGFRAME_UCONTEXT_OFFSET 128 +#define LOONGARCH_UCONTEXT_SIGCONTEXT_OFFSET 176 + +static void +loongarch_linux_rt_sigframe_init (const struct tramp_frame *self, + struct frame_info *this_frame, + struct trad_frame_cache *this_cache, + CORE_ADDR func) +{ + struct gdbarch *gdbarch =3D get_frame_arch (this_frame); + loongarch_gdbarch_tdep *tdep =3D (loongarch_gdbarch_tdep *) gdbarch_tdep= (gdbarch); + auto regs =3D tdep->regs; + + CORE_ADDR frame_sp =3D get_frame_sp (this_frame); + CORE_ADDR sigcontext_base =3D (frame_sp + LOONGARCH_RT_SIGFRAME_UCONTEXT= _OFFSET + + LOONGARCH_UCONTEXT_SIGCONTEXT_OFFSET); + + trad_frame_set_reg_addr (this_cache, regs.pc, sigcontext_base); + for (int i =3D 0; i < 32; i++) + trad_frame_set_reg_addr (this_cache, regs.r + i, sigcontext_base + 8 += i * 8); + + trad_frame_set_id (this_cache, frame_id_build (frame_sp, func)); +} + +/* li.w a7, __NR_rt_sigreturn */ +#define LOONGARCH_INST_LIW_A7_RT_SIGRETURN 0x03822c0b +/* syscall 0 */ +#define LOONGARCH_INST_SYSCALL 0x002b0000 + +static const struct tramp_frame loongarch_linux_rt_sigframe =3D +{ + SIGTRAMP_FRAME, + 4, + { + { LOONGARCH_INST_LIW_A7_RT_SIGRETURN, ULONGEST_MAX }, + { LOONGARCH_INST_SYSCALL, ULONGEST_MAX }, + { TRAMP_SENTINEL_INSN, ULONGEST_MAX } + }, + loongarch_linux_rt_sigframe_init, + NULL +}; + /* Initialize LoongArch Linux ABI info. */ =20 static void @@ -134,8 +180,12 @@ loongarch_linux_init_abi (struct gdbarch_info info, st= ruct gdbarch *gdbarch) =20 /* GNU/Linux uses the dynamic linker included in the GNU C Library. */ set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver); + /* Enable TLS support. */ set_gdbarch_fetch_tls_load_module_address (gdbarch, svr4_fetch_objfile_l= ink_map); + + /* Prepend tramp frame unwinder for signal. */ + tramp_frame_prepend_unwinder (gdbarch, &loongarch_linux_rt_sigframe); } =20 /* Initialize LoongArch Linux target support. */