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authorMaciej W. Rozycki <macro@linux-mips.org>2009-12-19 00:40:15 +0000
committerMaciej W. Rozycki <macro@linux-mips.org>2009-12-19 00:40:15 +0000
commitf19732033aae407a0a93a6a8be70aa1cdb05a322 (patch)
tree64df1119ff27d02a334b2092d66f2131a08fde91 /gdb/arm-linux-tdep.c
parent00f515dab69c7c12fc558402a9a701e28a787523 (diff)
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* 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.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c
index 7bd74a0..6d3eb26 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,