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[PATCH] libgcc: Add DWARF info to aeabi_ldivmod and aeabi_uldivmod
- From: Meador Inge <meadori at codesourcery dot com>
- To: <gcc-patches at gcc dot gnu dot org>
- Date: Tue, 5 Mar 2013 12:15:04 -0600
- Subject: [PATCH] libgcc: Add DWARF info to aeabi_ldivmod and aeabi_uldivmod
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?
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 */