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| author | Maciej W. Rozycki <macro@linux-mips.org> | 2009-12-19 00:40:14 +0000 |
|---|---|---|
| committer | Maciej W. Rozycki <macro@linux-mips.org> | 2009-12-19 00:40:14 +0000 |
| commit | d433cd579f689859141eba5c25294d67d6c44a5a (patch) | |
| tree | e443b87809e69b0da463b1772f3a44379b48ded3 /gdb/arm-linux-tdep.c | |
| parent | 92304fe24cb485c0bce277f6da99361603b00f96 (diff) | |
| download | gdb-d433cd579f689859141eba5c25294d67d6c44a5a.tar.gz | |
* arm-linux-tdep.c (ARM_OABI_SYSCALL_RESTART_SYSCALL): New macro.
(ARM_LDR_PC_SP_12): Likewise.
(arm_linux_restart_syscall_init): New function.
(arm_linux_restart_syscall_tramp_frame): New variable.
(arm_linux_init_abi): Install the
arm_linux_restart_syscall_tramp_frame unwinder.
Diffstat (limited to 'gdb/arm-linux-tdep.c')
| -rw-r--r-- | gdb/arm-linux-tdep.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c index 7bd74a090a4..6d3eb266ceb 100644 --- a/gdb/arm-linux-tdep.c +++ b/gdb/arm-linux-tdep.c @@ -216,6 +216,11 @@ static const char arm_linux_thumb_le_breakpoint[] = {0x01, 0xde}; #define ARM_SET_R7_RT_SIGRETURN 0xe3a070ad #define ARM_EABI_SYSCALL 0xef000000 +/* OABI syscall restart trampoline, used for EABI executables too + whenever OABI support has been enabled in the kernel. */ +#define ARM_OABI_SYSCALL_RESTART_SYSCALL 0xef900000 +#define ARM_LDR_PC_SP_12 0xe49df00c + static void arm_linux_sigtramp_cache (struct frame_info *this_frame, struct trad_frame_cache *this_cache, @@ -325,6 +330,21 @@ arm_linux_rt_sigreturn_init (const struct tramp_frame *self, + ARM_SIGCONTEXT_R0); } +static void +arm_linux_restart_syscall_init (const struct tramp_frame *self, + struct frame_info *this_frame, + struct trad_frame_cache *this_cache, + CORE_ADDR func) +{ + CORE_ADDR sp = get_frame_register_unsigned (this_frame, ARM_SP_REGNUM); + + trad_frame_set_reg_addr (this_cache, ARM_PC_REGNUM, sp); + trad_frame_set_reg_value (this_cache, ARM_SP_REGNUM, sp + 12); + + /* Save a frame ID. */ + trad_frame_set_id (this_cache, frame_id_build (sp, func)); +} + static struct tramp_frame arm_linux_sigreturn_tramp_frame = { SIGTRAMP_FRAME, 4, @@ -367,6 +387,17 @@ static struct tramp_frame arm_eabi_linux_rt_sigreturn_tramp_frame = { arm_linux_rt_sigreturn_init }; +static struct tramp_frame arm_linux_restart_syscall_tramp_frame = { + NORMAL_FRAME, + 4, + { + { ARM_OABI_SYSCALL_RESTART_SYSCALL, -1 }, + { ARM_LDR_PC_SP_12, -1 }, + { TRAMP_SENTINEL_INSN } + }, + arm_linux_restart_syscall_init +}; + /* Core file and register set support. */ #define ARM_LINUX_SIZEOF_GREGSET (18 * INT_REGISTER_SIZE) @@ -860,6 +891,8 @@ arm_linux_init_abi (struct gdbarch_info info, &arm_eabi_linux_sigreturn_tramp_frame); tramp_frame_prepend_unwinder (gdbarch, &arm_eabi_linux_rt_sigreturn_tramp_frame); + tramp_frame_prepend_unwinder (gdbarch, + &arm_linux_restart_syscall_tramp_frame); /* Core file support. */ set_gdbarch_regset_from_core_section (gdbarch, |