diff options
Diffstat (limited to 'arch/sparc64/lib/mcount.S')
| -rw-r--r-- | arch/sparc64/lib/mcount.S | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/arch/sparc64/lib/mcount.S b/arch/sparc64/lib/mcount.S deleted file mode 100644 index 2ef2e268bdc..00000000000 --- a/arch/sparc64/lib/mcount.S +++ /dev/null @@ -1,61 +0,0 @@ -/* - * Copyright (C) 2000 Anton Blanchard (anton@linuxcare.com) - * - * This file implements mcount(), which is used to collect profiling data. - * This can also be tweaked for kernel stack overflow detection. - */ - -#include <linux/config.h> -#include <linux/linkage.h> - -#include <asm/ptrace.h> -#include <asm/thread_info.h> - -/* - * This is the main variant and is called by C code. GCC's -pg option - * automatically instruments every C function with a call to this. - */ - -#ifdef CONFIG_STACK_DEBUG - -#define OVSTACKSIZE 4096 /* lets hope this is enough */ - - .data - .align 8 -panicstring: - .asciz "Stack overflow\n" - .align 8 -ovstack: - .skip OVSTACKSIZE -#endif - .text - .align 32 - .globl mcount, _mcount -mcount: -_mcount: -#ifdef CONFIG_STACK_DEBUG - /* - * Check whether %sp is dangerously low. - */ - ldub [%g6 + TI_FPDEPTH], %g1 - srl %g1, 1, %g3 - add %g3, 1, %g3 - sllx %g3, 8, %g3 ! each fpregs frame is 256b - add %g3, 192, %g3 - add %g6, %g3, %g3 ! where does task_struct+frame end? - sub %g3, STACK_BIAS, %g3 - cmp %sp, %g3 - bg,pt %xcc, 1f - sethi %hi(panicstring), %g3 - sethi %hi(ovstack), %g7 ! cant move to panic stack fast enough - or %g7, %lo(ovstack), %g7 - add %g7, OVSTACKSIZE, %g7 - sub %g7, STACK_BIAS, %g7 - mov %g7, %sp - call prom_printf - or %g3, %lo(panicstring), %o0 - call prom_halt - nop -#endif -1: retl - nop |