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[2/4] Match instruction adjusts SP in thumb

Message ID 5422BE7D.1020302@codesourcery.com
State New
Headers show

Commit Message

Yao Qi Sept. 24, 2014, 12:52 p.m. UTC
On 07/03/2014 02:09 PM, Yao Qi wrote:
> -      else if ((insn & 0xfe00) == 0xbc00)  /* pop <registers> */
> +      else if (thumb_instruction_restores_sp (insn))
>  	{
>  	  found_stack_adjust = 1;
> -	  if (insn & 0x0100)  /* <registers> include PC.  */
> +	  if ((insn & 0xfe00) == 0xbd00)  /* pop <registers, PC> */
>  	    found_return = 1;
>  	}

This patch fixes a typo in the bit mask I've made in my previous code
refactor.  If PC is in the register list, the bit 8 is one, so bit
mask 0xff00 should be used.  Current condition is a constant false.
Regression tested on arm-linux-gnueabi.  Patch is pushed in.

gdb:

2014-09-24  Yao Qi  <yao@codesourcery.com>

	* arm-tdep.c (thumb_in_function_epilogue_p): Fix typo in the
	bitmask.
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Patch

diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index 742053f..5dccf0a 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -3273,7 +3273,7 @@  thumb_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
 	found_return = 1;
       else if (thumb_instruction_restores_sp (insn))
 	{
-	  if ((insn & 0xfe00) == 0xbd00)  /* pop <registers, PC> */
+	  if ((insn & 0xff00) == 0xbd00)  /* pop <registers, PC> */
 	    found_return = 1;
 	}
       else if (thumb_insn_size (insn) == 4)  /* 32-bit Thumb-2 instruction */