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| author | Ben Cheng <bccheng@google.com> | 2009-09-15 13:41:14 -0700 |
|---|---|---|
| committer | Ben Cheng <bccheng@google.com> | 2009-09-15 13:41:14 -0700 |
| commit | bd192b470b69e00e9313680b70c5572a609e535d (patch) | |
| tree | 61d3575f3195acab886e3fe74388ff45b76fb539 | |
| parent | 824201294b5f3c3ad6ca9d9751d96f78142c5409 (diff) | |
| download | bionic-bd192b470b69e00e9313680b70c5572a609e535d.zip bionic-bd192b470b69e00e9313680b70c5572a609e535d.tar.gz bionic-bd192b470b69e00e9313680b70c5572a609e535d.tar.bz2 | |
Add stack unwinding directives to assembly leaf functions.
So that the real culprit of native crashes can surface in the stack trace.
| -rw-r--r-- | libc/arch-arm/bionic/atomics_arm.S | 9 | ||||
| -rw-r--r-- | libc/arch-arm/bionic/memcmp.S | 3 | ||||
| -rw-r--r-- | libc/arch-arm/bionic/memcmp16.S | 3 | ||||
| -rw-r--r-- | libc/arch-arm/bionic/memcpy.S | 2 |
4 files changed, 17 insertions, 0 deletions
diff --git a/libc/arch-arm/bionic/atomics_arm.S b/libc/arch-arm/bionic/atomics_arm.S index b2da09f..f8b23e6 100644 --- a/libc/arch-arm/bionic/atomics_arm.S +++ b/libc/arch-arm/bionic/atomics_arm.S @@ -41,6 +41,8 @@ .equ kernel_cmpxchg, 0xFFFF0FC0 .equ kernel_atomic_base, 0xFFFF0FFF __atomic_dec: + .fnstart + .save {r4, lr} stmdb sp!, {r4, lr} mov r2, r0 1: @ atomic_dec @@ -53,8 +55,11 @@ __atomic_dec: add r0, r1, #1 ldmia sp!, {r4, lr} bx lr + .fnend __atomic_inc: + .fnstart + .save {r4, lr} stmdb sp!, {r4, lr} mov r2, r0 1: @ atomic_inc @@ -67,9 +72,12 @@ __atomic_inc: sub r0, r1, #1 ldmia sp!, {r4, lr} bx lr + .fnend /* r0(old) r1(new) r2(addr) -> r0(zero_if_succeeded) */ __atomic_cmpxchg: + .fnstart + .save {r4, lr} stmdb sp!, {r4, lr} mov r4, r0 /* r4 = save oldvalue */ 1: @ atomic_cmpxchg @@ -84,6 +92,7 @@ __atomic_cmpxchg: 2: @ atomic_cmpxchg ldmia sp!, {r4, lr} bx lr + .fnend #else #define KUSER_CMPXCHG 0xffffffc0 diff --git a/libc/arch-arm/bionic/memcmp.S b/libc/arch-arm/bionic/memcmp.S index f45b56b..67dcddc 100644 --- a/libc/arch-arm/bionic/memcmp.S +++ b/libc/arch-arm/bionic/memcmp.S @@ -44,6 +44,7 @@ */ memcmp: + .fnstart PLD (r0, #0) PLD (r1, #0) @@ -53,6 +54,7 @@ memcmp: moveq r0, #0 bxeq lr + .save {r4, lr} /* save registers */ stmfd sp!, {r4, lr} @@ -174,6 +176,7 @@ memcmp: 9: /* restore registers and return */ ldmfd sp!, {r4, lr} bx lr + .fnend diff --git a/libc/arch-arm/bionic/memcmp16.S b/libc/arch-arm/bionic/memcmp16.S index 38d8b62..f398588 100644 --- a/libc/arch-arm/bionic/memcmp16.S +++ b/libc/arch-arm/bionic/memcmp16.S @@ -44,6 +44,7 @@ */ __memcmp16: + .fnstart PLD (r0, #0) PLD (r1, #0) @@ -79,6 +80,7 @@ __memcmp16: bx lr + .save {r4, lr} /* save registers */ 0: stmfd sp!, {r4, lr} @@ -93,6 +95,7 @@ __memcmp16: /* restore registers and return */ ldmnefd sp!, {r4, lr} bxne lr + .fnend diff --git a/libc/arch-arm/bionic/memcpy.S b/libc/arch-arm/bionic/memcpy.S index 97331d3..4ea2c6d 100644 --- a/libc/arch-arm/bionic/memcpy.S +++ b/libc/arch-arm/bionic/memcpy.S @@ -40,6 +40,7 @@ #define NEON_MAX_PREFETCH_DISTANCE 320 memcpy: + .fnstart mov ip, r0 cmp r2, #16 blt 4f @ Have less than 16 bytes to copy @@ -128,6 +129,7 @@ memcpy: ldrmib r3, [r1], #1 strmib r3, [ip], #1 bx lr + .fnend #else /* __ARM_ARCH__ < 7 */ |