details: https://anonhg.NetBSD.org/src/rev/4da1dfec8df2
branches: trunk
changeset: 789365:4da1dfec8df2
user: matt <matt%NetBSD.org@localhost>
date: Fri Aug 16 21:42:48 2013 +0000
description:
__mcount is always arm code (even if compiled -mthumb).
Add .cfi for unwind tables
diffstat:
sys/arch/arm/include/profile.h | 69 ++++++++++++++++++-----------------------
1 files changed, 30 insertions(+), 39 deletions(-)
diffs (111 lines):
diff -r c4c30284b8d9 -r 4da1dfec8df2 sys/arch/arm/include/profile.h
--- a/sys/arch/arm/include/profile.h Fri Aug 16 21:04:07 2013 +0000
+++ b/sys/arch/arm/include/profile.h Fri Aug 16 21:42:48 2013 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: profile.h,v 1.9 2013/08/15 22:41:15 matt Exp $ */
+/* $NetBSD: profile.h,v 1.10 2013/08/16 21:42:48 matt Exp $ */
/*
* Copyright (c) 2001 Ben Harris
@@ -54,10 +54,20 @@
__asm(".type " MCOUNT_ASM_NAME ",%function"); \
__asm(".global " MCOUNT_ASM_NAME); \
__asm(MCOUNT_ASM_NAME ":"); \
+ __asm(".cfi_startproc"); \
+ __asm(".fnstart"); \
/* \
* Preserve registers that are trashed during mcount \
*/ \
__asm("push {r0-r3, ip, lr}"); \
+ __asm(".save {r0-r3, ip, lr}"); \
+ __asm(".cfi_def_cfa_offset 24"); \
+ __asm(".cfi_offset 14, -4"); \
+ __asm(".cfi_offset 12, -8"); \
+ __asm(".cfi_offset 3, -12"); \
+ __asm(".cfi_offset 2, -16"); \
+ __asm(".cfi_offset 1, -20"); \
+ __asm(".cfi_offset 0, -24"); \
/* Check what mode we're in. EQ => 32, NE => 26 */ \
__asm("teq r0, r0"); \
__asm("teq pc, r15"); \
@@ -81,19 +91,32 @@
/* \
* Restore registers that were trashed during mcount \
*/ \
- __asm("pop {r0-r3, lr, pc}"); \
+ __asm("pop {r0-r3, pc}"); \
+ __asm(".cfi_endproc"); \
+ __asm(".fnend"); \
__asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME);
-#elif !defined(__thumb__) || defined(_ARM_ARCH_T2)
+#else
#define MCOUNT \
__asm(".text"); \
__asm(".align 0"); \
__asm(".type " MCOUNT_ASM_NAME ",%function"); \
__asm(".global " MCOUNT_ASM_NAME); \
+ __asm(".arm"); \
__asm(MCOUNT_ASM_NAME ":"); \
+ __asm(".fnstart"); \
+ __asm(".cfi_startproc"); \
/* \
* Preserve registers that are trashed during mcount \
*/ \
- __asm("push {r0-r3, ip, lr}"); \
+ __asm("push {r0-r4, ip, lr}"); \
+ __asm(".save {r0-r4, lr}"); \
+ __asm(".cfi_def_cfa_offset 24"); \
+ __asm(".cfi_offset 14, -4"); \
+ __asm(".cfi_offset 4, -8"); \
+ __asm(".cfi_offset 3, -12"); \
+ __asm(".cfi_offset 2, -16"); \
+ __asm(".cfi_offset 1, -20"); \
+ __asm(".cfi_offset 0, -24"); \
/* \
* find the return address for mcount, \
* and the return address for mcount's caller. \
@@ -112,41 +135,9 @@
/* \
* Restore registers that were trashed during mcount \
*/ \
- __asm("pop {r0-r3, lr, pc}"); \
- __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME);
-#else
-#define MCOUNT \
- __asm(".text"); \
- __asm(".align 0"); \
- __asm(".thumb_func"); \
- __asm(".type " MCOUNT_ASM_NAME ",%function"); \
- __asm(".global " MCOUNT_ASM_NAME); \
- __asm(MCOUNT_ASM_NAME ":"); \
- /* \
- * Preserve registers that are trashed during mcount \
- */ \
- __asm("push {r0-r4,lr}"); \
- __asm("mov r4, ip"); \
- /* \
- * find the return address for mcount, \
- * and the return address for mcount's caller. \
- * \
- * frompcindex = pc pushed by call into self. \
- */ \
- __asm("mov r0, ip"); \
- /* \
- * selfpc = pc pushed by mcount call \
- */ \
- __asm("mov r1, lr"); \
- /* \
- * Call the real mcount code \
- */ \
- __asm("bl " ___STRING(_C_LABEL(_mcount)) PLTSYM); \
- /* \
- * Restore registers that were trashed during mcount \
- */ \
- __asm("mov lr, r4"); \
- __asm("pop {r0-r4, pc}"); \
+ __asm("pop {r0-r4, lr, pc}"); \
+ __asm(".cfi_endproc"); \
+ __asm(".fnend"); \
__asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME);
#endif