diff options
Diffstat (limited to 'arch/sparc64/lib/mcount.S')
-rw-r--r-- | arch/sparc64/lib/mcount.S | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/arch/sparc64/lib/mcount.S b/arch/sparc64/lib/mcount.S deleted file mode 100644 index fad90ddb3a2..00000000000 --- a/arch/sparc64/lib/mcount.S +++ /dev/null @@ -1,143 +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/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 - .type _mcount,#function - .globl mcount - .type mcount,#function -_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 - nop - lduh [%g6 + TI_CPU], %g1 - sethi %hi(hardirq_stack), %g3 - or %g3, %lo(hardirq_stack), %g3 - sllx %g1, 3, %g1 - ldx [%g3 + %g1], %g7 - sub %g7, STACK_BIAS, %g7 - cmp %sp, %g7 - bleu,pt %xcc, 2f - sethi %hi(THREAD_SIZE), %g3 - add %g7, %g3, %g7 - cmp %sp, %g7 - blu,pn %xcc, 1f -2: sethi %hi(softirq_stack), %g3 - or %g3, %lo(softirq_stack), %g3 - ldx [%g3 + %g1], %g7 - cmp %sp, %g7 - bleu,pt %xcc, 2f - sethi %hi(THREAD_SIZE), %g3 - add %g7, %g3, %g7 - cmp %sp, %g7 - blu,pn %xcc, 1f - nop - /* If we are already on ovstack, don't hop onto it - * again, we are already trying to output the stack overflow - * message. - */ - sethi %hi(ovstack), %g7 ! cant move to panic stack fast enough - or %g7, %lo(ovstack), %g7 - add %g7, OVSTACKSIZE, %g3 - sub %g3, STACK_BIAS + 192, %g3 - sub %g7, STACK_BIAS, %g7 - cmp %sp, %g7 - blu,pn %xcc, 2f - cmp %sp, %g3 - bleu,pn %xcc, 1f - nop -2: mov %g3, %sp - sethi %hi(panicstring), %g3 - call prom_printf - or %g3, %lo(panicstring), %o0 - call prom_halt - nop -1: -#endif -#ifdef CONFIG_FTRACE -#ifdef CONFIG_DYNAMIC_FTRACE - mov %o7, %o0 - .globl mcount_call -mcount_call: - call ftrace_stub - mov %o0, %o7 -#else - sethi %hi(ftrace_trace_function), %g1 - sethi %hi(ftrace_stub), %g2 - ldx [%g1 + %lo(ftrace_trace_function)], %g1 - or %g2, %lo(ftrace_stub), %g2 - cmp %g1, %g2 - be,pn %icc, 1f - mov %i7, %o1 - jmpl %g1, %g0 - mov %o7, %o0 - /* not reached */ -1: -#endif -#endif - retl - nop - .size _mcount,.-_mcount - .size mcount,.-mcount - -#ifdef CONFIG_FTRACE - .globl ftrace_stub - .type ftrace_stub,#function -ftrace_stub: - retl - nop - .size ftrace_stub,.-ftrace_stub -#ifdef CONFIG_DYNAMIC_FTRACE - .globl ftrace_caller - .type ftrace_caller,#function -ftrace_caller: - mov %i7, %o1 - mov %o7, %o0 - .globl ftrace_call -ftrace_call: - call ftrace_stub - mov %o0, %o7 - retl - nop - .size ftrace_caller,.-ftrace_caller -#endif -#endif |