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| author | Jiangshuai Li <jiangshuai_li@linux.alibaba.com> | 2022-08-15 10:40:29 +0800 |
|---|---|---|
| committer | Jiangshuai Li <jiangshuai_li@linux.alibaba.com> | 2022-08-15 10:40:29 +0800 |
| commit | 105afa7f230e5fed8f5a2eb28bc14d7696f5ac72 (patch) | |
| tree | 752b654d349bfd76d4a0f2f462792978ed2c648a | |
| parent | a9c09a3667cce34a9b5f7f0983254cc66a90e145 (diff) | |
| download | gdb-105afa7f230e5fed8f5a2eb28bc14d7696f5ac72.zip gdb-105afa7f230e5fed8f5a2eb28bc14d7696f5ac72.tar.gz gdb-105afa7f230e5fed8f5a2eb28bc14d7696f5ac72.tar.bz2 | |
gdb/csky add unwinder for sigtramp frame when kernel 4.x and later
When kernel veriosn >= V4.x, the characteristic values used to
determine whether it is a signal function call are:
movi r7, 139
trap 0
Registers are saved at (sp + CSKY_SIGINFO_OFFSET + CSKY_SIGINFO_SIZE
+ CSKY_UCONTEXT_SIGCONTEXT + CSKY_SIGCONTEXT_PT_REGS_TLS). The order
is described in csky_linux_rt_sigreturn_init_pt_regs.
| -rw-r--r-- | gdb/csky-linux-tdep.c | 47 | ||||
| -rw-r--r-- | gdb/csky-tdep.h | 6 |
2 files changed, 53 insertions, 0 deletions
diff --git a/gdb/csky-linux-tdep.c b/gdb/csky-linux-tdep.c index ae5d2bb..7bcc171 100644 --- a/gdb/csky-linux-tdep.c +++ b/gdb/csky-linux-tdep.c @@ -353,6 +353,51 @@ csky_linux_rt_sigreturn_tramp_frame = { csky_linux_rt_sigreturn_init }; +static void +csky_linux_rt_sigreturn_init_pt_regs (const struct tramp_frame *self, + struct frame_info *this_frame, + struct trad_frame_cache *this_cache, + CORE_ADDR func) +{ + int i; + CORE_ADDR sp = get_frame_register_unsigned (this_frame, CSKY_SP_REGNUM); + + CORE_ADDR base = sp + CSKY_SIGINFO_OFFSET + CSKY_SIGINFO_SIZE + + CSKY_UCONTEXT_SIGCONTEXT + + CSKY_SIGCONTEXT_PT_REGS_TLS; + + /* LR */ + trad_frame_set_reg_addr (this_cache, CSKY_R15_REGNUM, base); + + /* PC */ + trad_frame_set_reg_addr (this_cache, CSKY_PC_REGNUM, base + 4); + + /* PSR */ + trad_frame_set_reg_addr (this_cache, CSKY_CR0_REGNUM, base + 8); + + /* SP */ + trad_frame_set_reg_addr (this_cache, CSKY_SP_REGNUM, base + 12); + + /* Set addrs of R0 ~ R13. */ + for (i = 0; i < 14; i++) + trad_frame_set_reg_addr (this_cache, i, base + i * 4 + 20); + + trad_frame_set_id (this_cache, frame_id_build (sp, func)); +} + + +static struct tramp_frame +csky_linux_rt_sigreturn_tramp_frame_kernel_4x = { + SIGTRAMP_FRAME, + 4, + { + { CSKY_MOVI_R7_139, ULONGEST_MAX }, + { CSKY_TRAP_0, ULONGEST_MAX }, + { TRAMP_SENTINEL_INSN } + }, + csky_linux_rt_sigreturn_init_pt_regs +}; + /* Hook function for gdbarch_register_osabi. */ static void @@ -378,6 +423,8 @@ csky_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) tramp_frame_prepend_unwinder (gdbarch, &csky_linux_rt_sigreturn_tramp_frame); + tramp_frame_prepend_unwinder (gdbarch, + &csky_linux_rt_sigreturn_tramp_frame_kernel_4x); } void _initialize_csky_linux_tdep (); diff --git a/gdb/csky-tdep.h b/gdb/csky-tdep.h index 3ee50fc..f845b9a 100644 --- a/gdb/csky-tdep.h +++ b/gdb/csky-tdep.h @@ -379,4 +379,10 @@ enum csky_regnum #define CSKY_MOVI_R7_173 0x00adea07 #define CSKY_TRAP_0 0x2020c000 +/* Sizeof (tls) */ +#define CSKY_SIGCONTEXT_PT_REGS_TLS 4 + +/* Macro for kernel 4.x */ +#define CSKY_MOVI_R7_139 0x008bea07 + #endif |