From: Liu Yuan <[email protected]>
Signed-off-by: Liu Yuan <[email protected]> --- include/util.h | 2 + sheep/trace/mcount.S | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++ sheep/trace/trace.h | 10 +++++++ 3 files changed, 78 insertions(+), 0 deletions(-) create mode 100644 sheep/trace/mcount.S create mode 100644 sheep/trace/trace.h diff --git a/include/util.h b/include/util.h index 725c8f8..ff86a00 100644 --- a/include/util.h +++ b/include/util.h @@ -28,6 +28,8 @@ #define __cpu_to_le32(x) bswap_32(x) #endif +#define notrace __attribute__((no_instrument_function)) + static inline int before(uint32_t seq1, uint32_t seq2) { return (int32_t)(seq1 - seq2) < 0; diff --git a/sheep/trace/mcount.S b/sheep/trace/mcount.S new file mode 100644 index 0000000..c16e5ae --- /dev/null +++ b/sheep/trace/mcount.S @@ -0,0 +1,66 @@ +#define __ASSEMBLY__ +#include "trace.h" + +#define _ALIGN_TEXT .align 16, 0x90 + +#define ENTRY(x) \ + .text; _ALIGN_TEXT; .globl x; .type x,@function; x: + +ENTRY(mcount) + subq $0x38, %rsp + movq %rax, (%rsp) + movq %rcx, 8(%rsp) + movq %rdx, 16(%rsp) + movq %rsi, 24(%rsp) + movq %rdi, 32(%rsp) + movq %r8, 40(%rsp) + movq %r9, 48(%rsp) + + movq 0x38(%rsp), %rdi + subq $INSN_SIZE, %rdi + +.globl mcount_call +mcount_call: + call trace_stub + + movq 48(%rsp), %r9 + movq 40(%rsp), %r8 + movq 32(%rsp), %rdi + movq 24(%rsp), %rsi + movq 16(%rsp), %rdx + movq 8(%rsp), %rcx + movq (%rsp), %rax + addq $0x38, %rsp + + retq + +ENTRY(trace_caller) + subq $0x38, %rsp + movq %rax, (%rsp) + movq %rcx, 8(%rsp) + movq %rdx, 16(%rsp) + movq %rsi, 24(%rsp) + movq %rdi, 32(%rsp) + movq %r8, 40(%rsp) + movq %r9, 48(%rsp) + + movq 0x38(%rsp), %rdi + movq 8(%rbp), %rsi + subq $INSN_SIZE, %rdi + +.globl trace_call +trace_call: + call trace_stub + + movq 48(%rsp), %r9 + movq 40(%rsp), %r8 + movq 32(%rsp), %rdi + movq 24(%rsp), %rsi + movq 16(%rsp), %rdx + movq 8(%rsp), %rcx + movq (%rsp), %rax + addq $0x38, %rsp + +.globl trace_stub +trace_stub: + retq diff --git a/sheep/trace/trace.h b/sheep/trace/trace.h new file mode 100644 index 0000000..3e675e1 --- /dev/null +++ b/sheep/trace/trace.h @@ -0,0 +1,10 @@ +#ifndef TRACE_H +#define TRACE_H + +/* mcount.S */ +extern void mcount(void); +extern void mcount_call(void); +extern void trace_caller(void); +extern void trace_call(unsigned long, unsigned long *); + +#endif -- 1.7.8.2 -- sheepdog mailing list [email protected] http://lists.wpkg.org/mailman/listinfo/sheepdog
