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Re: [PATCH] libgcc: Add DWARF info to aeabi_ldivmod and aeabi_uldivmod


On 03/18/13 19:20, Meador Inge wrote:
Ping.

On 03/05/2013 12:15 PM, Meador Inge wrote:
Hi All,

This patch fixes a minor annoyance that causes backtraces to disappear
inside of aeabi_ldivmod and aeabi_uldivmod due to the lack of appropriate
DWARF information.  I fixed the problem by adding the necessary cfi_*
macros in these functions.

OK?

This is OK .

R

2013-03-05  Meador Inge  <meadori@codesourcery.com>

	* config/arm/bpabi.S (aeabi_ldivmod): Add DWARF information for
	computing the location of the link register.
	(aeabi_uldivmod): Ditto.

Index: libgcc/config/arm/bpabi.S
===================================================================
--- libgcc/config/arm/bpabi.S	(revision 196470)
+++ libgcc/config/arm/bpabi.S	(working copy)
@@ -123,6 +123,7 @@ ARM_FUNC_START aeabi_ulcmp
  #ifdef L_aeabi_ldivmod

  ARM_FUNC_START aeabi_ldivmod
+	cfi_start	__aeabi_ldivmod, LSYM(Lend_aeabi_ldivmod)
  	test_div_by_zero signed

  	sub sp, sp, #8
@@ -132,17 +133,20 @@ ARM_FUNC_START aeabi_ldivmod
  #else
  	do_push {sp, lr}
  #endif
+98:	cfi_push 98b - __aeabi_ldivmod, 0xe, -0xc, 0x10
  	bl SYM(__gnu_ldivmod_helper) __PLT__
  	ldr lr, [sp, #4]
  	add sp, sp, #8
  	do_pop {r2, r3}
  	RET
+	cfi_end	LSYM(Lend_aeabi_ldivmod)
  	
  #endif /* L_aeabi_ldivmod */

  #ifdef L_aeabi_uldivmod

  ARM_FUNC_START aeabi_uldivmod
+	cfi_start	__aeabi_uldivmod, LSYM(Lend_aeabi_uldivmod)
  	test_div_by_zero unsigned

  	sub sp, sp, #8
@@ -152,11 +156,13 @@ ARM_FUNC_START aeabi_uldivmod
  #else
  	do_push {sp, lr}
  #endif
+98:	cfi_push 98b - __aeabi_uldivmod, 0xe, -0xc, 0x10
  	bl SYM(__gnu_uldivmod_helper) __PLT__
  	ldr lr, [sp, #4]
  	add sp, sp, #8
  	do_pop {r2, r3}
  	RET
-	
+	cfi_end	LSYM(Lend_aeabi_uldivmod)
+
  #endif /* L_aeabi_divmod */
  	






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