diff options
| author | Tiezhu Yang <yangtiezhu@loongson.cn> | 2022-03-31 19:56:51 +0800 |
|---|---|---|
| committer | Tiezhu Yang <yangtiezhu@loongson.cn> | 2022-04-06 22:32:26 +0800 |
| commit | 7fb56b98937a2feef5a3e12d8b00506ff4d132be (patch) | |
| tree | 802da2e5d8368dd2ee042a5922af923fa2560ffb /gdb | |
| parent | 9716aa0a271cf59fb40194440ea6e2a0cf8ab192 (diff) | |
| download | gdb-7fb56b98937a2feef5a3e12d8b00506ff4d132be.zip gdb-7fb56b98937a2feef5a3e12d8b00506ff4d132be.tar.gz gdb-7fb56b98937a2feef5a3e12d8b00506ff4d132be.tar.bz2 | |
gdb: LoongArch: prepend tramp frame unwinder for signal
Implement the "init" method of struct tramp_frame to prepend tramp
frame unwinder for signal on LoongArch.
With this patch, the following failed testcases can be fixed:
FAIL: gdb.base/annota1.exp: backtrace @ signal handler (timeout)
FAIL: gdb.base/annota3.exp: backtrace @ signal handler (pattern 2)
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Diffstat (limited to 'gdb')
| -rw-r--r-- | gdb/loongarch-linux-tdep.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/gdb/loongarch-linux-tdep.c b/gdb/loongarch-linux-tdep.c index 6c040c3..7e219c4 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" /* Unpack an elf_gregset_t into GDB's register cache. */ @@ -117,6 +119,50 @@ const struct regset loongarch_gregset = loongarch_fill_gregset, }; +/* 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 = get_frame_arch (this_frame); + loongarch_gdbarch_tdep *tdep = (loongarch_gdbarch_tdep *) gdbarch_tdep (gdbarch); + auto regs = tdep->regs; + + CORE_ADDR frame_sp = get_frame_sp (this_frame); + CORE_ADDR sigcontext_base = (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 = 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 = +{ + 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. */ static void @@ -134,8 +180,12 @@ loongarch_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) /* 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_link_map); + + /* Prepend tramp frame unwinder for signal. */ + tramp_frame_prepend_unwinder (gdbarch, &loongarch_linux_rt_sigframe); } /* Initialize LoongArch Linux target support. */ |