diff options
Diffstat (limited to 'lib/xray/xray_trampoline_x86_64.S')
| -rw-r--r-- | lib/xray/xray_trampoline_x86_64.S | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/lib/xray/xray_trampoline_x86_64.S b/lib/xray/xray_trampoline_x86_64.S index d90c30cd98e9..da0aae326bdc 100644 --- a/lib/xray/xray_trampoline_x86_64.S +++ b/lib/xray/xray_trampoline_x86_64.S @@ -13,6 +13,8 @@ // //===----------------------------------------------------------------------===// +#include "../builtins/assembly.h" + .macro SAVE_REGISTERS subq $200, %rsp movupd %xmm0, 184(%rsp) @@ -53,6 +55,9 @@ .text .file "xray_trampoline_x86.S" + +//===----------------------------------------------------------------------===// + .globl __xray_FunctionEntry .align 16, 0x90 .type __xray_FunctionEntry,@function @@ -81,6 +86,8 @@ __xray_FunctionEntry: .size __xray_FunctionEntry, .Ltmp1-__xray_FunctionEntry .cfi_endproc +//===----------------------------------------------------------------------===// + .globl __xray_FunctionExit .align 16, 0x90 .type __xray_FunctionExit,@function @@ -117,6 +124,8 @@ __xray_FunctionExit: .size __xray_FunctionExit, .Ltmp3-__xray_FunctionExit .cfi_endproc +//===----------------------------------------------------------------------===// + .global __xray_FunctionTailExit .align 16, 0x90 .type __xray_FunctionTailExit,@function @@ -145,3 +154,41 @@ __xray_FunctionTailExit: .Ltmp5: .size __xray_FunctionTailExit, .Ltmp5-__xray_FunctionTailExit .cfi_endproc + +//===----------------------------------------------------------------------===// + + .globl __xray_ArgLoggerEntry + .align 16, 0x90 + .type __xray_ArgLoggerEntry,@function +__xray_ArgLoggerEntry: + .cfi_startproc + pushq %rbp + .cfi_def_cfa_offset 16 + SAVE_REGISTERS + + // Again, these function pointer loads must be atomic; MOV is fine. + movq _ZN6__xray13XRayArgLoggerE(%rip), %rax + testq %rax, %rax + jne .Larg1entryLog + + // If [arg1 logging handler] not set, defer to no-arg logging. + movq _ZN6__xray19XRayPatchedFunctionE(%rip), %rax + testq %rax, %rax + je .Larg1entryFail + +.Larg1entryLog: + movq %rdi, %rdx // first argument will become the third + xorq %rsi, %rsi // XRayEntryType::ENTRY into the second + movl %r10d, %edi // 32-bit function ID becomes the first + callq *%rax + +.Larg1entryFail: + RESTORE_REGISTERS + popq %rbp + retq + +.Larg1entryEnd: + .size __xray_ArgLoggerEntry, .Larg1entryEnd-__xray_ArgLoggerEntry + .cfi_endproc + +NO_EXEC_STACK_DIRECTIVE |