From: Maciej W. Rozycki <macro@linux-mips.org>
Date: Sat, 19 Dec 2009 00:40:15 +0000 (+0000)
Subject: 	* arm-linux-tdep.c (ARM_OABI_SYSCALL_RESTART_SYSCALL): New macro.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f19732033aae407a0a93a6a8be70aa1cdb05a322;p=binutils-gdb.git

	* 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.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 16d3f66a04b..9868c7af830 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,12 @@
+2009-12-19  Maciej W. Rozycki  <macro@codesourcery.com>
+
+	* 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.
+
 2009-12-18  Doug Evans  <dje@google.com>
 
 	* gdb_proc_service.h (psaddr_t): Fix type.
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,