Author: andrew
Date: Sun Mar 10 02:40:50 2013
New Revision: 248124
URL: http://svnweb.freebsd.org/changeset/base/248124
Log:
Update how we read the stack pointer to work on both GCC and clang.
Modified:
head/sys/arm/arm/db_trace.c
Modified: head/sys/arm/arm/db_trace.c
==============================================================================
--- head/sys/arm/arm/db_trace.c Sun Mar 10 02:38:35 2013 (r248123)
+++ head/sys/arm/arm/db_trace.c Sun Mar 10 02:40:50 2013 (r248124)
@@ -612,10 +612,13 @@ db_trace_self(void)
{
#ifdef __ARM_EABI__
struct unwind_state state;
- register uint32_t sp __asm__ ("sp");
+ uint32_t sp;
+
+ /* Read the stack pointer */
+ __asm __volatile("mov %0, sp" : "=&r" (sp));
state.registers[FP] = (uint32_t)__builtin_frame_address(0);
- state.registers[SP] = (uint32_t)sp;
+ state.registers[SP] = sp;
state.registers[LR] = (uint32_t)__builtin_return_address(0);
state.registers[PC] = (uint32_t)db_trace_self;
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