diff options
Diffstat (limited to 'sysdeps/arm/machine-gmon.h')
| -rw-r--r-- | sysdeps/arm/machine-gmon.h | 42 |
1 files changed, 26 insertions, 16 deletions
diff --git a/sysdeps/arm/machine-gmon.h b/sysdeps/arm/machine-gmon.h index 27643df884..96b4c13c72 100644 --- a/sysdeps/arm/machine-gmon.h +++ b/sysdeps/arm/machine-gmon.h @@ -1,5 +1,5 @@ /* Machine-dependent definitions for profiling support. ARM version. - Copyright (C) 1996, 1997 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -37,19 +37,29 @@ static void mcount_internal (u_long frompc, u_long selfpc); #define _MCOUNT_DECL(frompc, selfpc) \ static void mcount_internal (u_long frompc, u_long selfpc) -#define MCOUNT \ -void _mcount (void) \ -{ \ - register unsigned long int frompc, selfpc; \ - __asm__("movs fp, fp; " \ - "moveq %0, $0; " \ - "ldrne %0, [fp, $-4]; " \ - "ldrne %1, [fp, $-12]; " \ - "movnes %1, %1; " \ - "ldrne %1, [%1, $-4]; " \ - : "=g" (selfpc), "=g" (frompc) \ - : : "cc" \ - ); \ - if (selfpc) \ - mcount_internal(frompc, selfpc); \ +/* This macro/func MUST save r0, r1 because the compiler inserts + blind calls to _mount(), ignoring the fact that _mcount may + clobber registers; therefore, _mcount may NOT clobber registers */ +/* if (this_fp!=0) { + r0 = this_lr + r1 = this_fp + r1 = [r1-4] which is caller's fp + if (r1!=0) + r1 = caller's lr + call mcount_internal(this_lr, caller's_lr) + } +*/ +#define MCOUNT \ +void _mcount (void) \ +{ \ + __asm__("stmdb sp!, {r0, r1, r2, r3};" \ + "movs fp, fp;" \ + "moveq r0, #0;" \ + "ldrne r0, [fp, $-4];" \ + "ldrne r1, [fp, $-12];" \ + "movnes r1, r1;" \ + "ldrne r1, [r1, $-4];" \ + "movs r1, r1;" \ + "blne mcount_internal;" \ + "ldmia sp!, {r0, r1, r2, r3}"); \ } |