| #if defined(_M_X64) || defined(__x86_64__) /* HOST_ARCH_X64 */ |
| |
| .intel_syntax noprefix |
| .text |
| |
| #if defined(__linux__) || defined(__FreeBSD__) /* HOST_OS_LINUX */ |
| .globl FfiTrampolineCall |
| .type FfiTrampolineCall, @function |
| FfiTrampolineCall: |
| #else /* HOST_OS_MACOS */ |
| .globl _FfiTrampolineCall |
| _FfiTrampolineCall: |
| #endif |
| |
| /* Save argument in scratch register. */ |
| push rbx /* Backup caller saved register. */ |
| mov rbx, rdi /* Save argument in scratch register. */ |
| |
| /* Enter frame. */ |
| push rbp |
| mov rbp, rsp |
| |
| /* Reserve framespace for arguments. */ |
| mov rax, [rbx+0x80] /* Load number of stack arguments. */ |
| shl rax, 3 /* Multiply by size (8 bytes). */ |
| sub rsp, rax /* Reserve num_stack_args stack slots. */ |
| |
| /* Stack alignment. */ |
| and rsp, [rbx+0x78] /* Align stack with stack alignment mask. */ |
| |
| /* Copy stack arguments. */ |
| cmp rax, 0x0 /* Check if number of stack arguments is 0. */ |
| jz .done /* Skip loop if no stack arguments. */ |
| add rsp, rax /* Unreserve stack slots so we can push arguments. */ |
| add rbx, 0x80 /* Offset RBX to point to stack arguments */ |
| .loop: /* Copy stack arguments loop. */ |
| push [rbx+rax] /* Push stack argument. */ |
| sub rax, 0x8 /* Decrement stack argument iterator. */ |
| cmp rax, 0x0 /* Compare iterator with 0 */ |
| jnz .loop /* Loop while iterator is not 0 */ |
| sub rbx, 0x80 /* Restore RBX to original value. */ |
| .done: /* End stack arguments loop. */ |
| |
| /* Copy registers and fpu registers. */ |
| mov rdi, [rbx+0x8] /* kArg1Reg */ |
| mov rsi, [rbx+0x10] /* kArg2Reg */ |
| mov rdx, [rbx+0x18] /* kArg3Reg */ |
| mov rcx, [rbx+0x20] /* kArg4Reg */ |
| mov r8, [rbx+0x28] /* kArg5Reg */ |
| mov r9, [rbx+0x30] /* kArg6Reg */ |
| movsd xmm0, [rbx+0x38] |
| movsd xmm1, [rbx+0x40] |
| movsd xmm2, [rbx+0x48] |
| movsd xmm3, [rbx+0x50] |
| movsd xmm4, [rbx+0x58] |
| movsd xmm5, [rbx+0x60] |
| movsd xmm6, [rbx+0x68] |
| movsd xmm7, [rbx+0x70] |
| |
| /* Do call. */ |
| mov rax, [rbx] /* function address */ |
| call rax /* Call the function. */ |
| |
| /* Copy results back. */ |
| mov [rbx], rax /* Move integer result in kOffsetIntResult */ |
| movsd [rbx+8], xmm0 /* Move double result in kOffsetDoubleResult */ |
| |
| /* leave frame */ |
| mov rsp, rbp |
| pop rbp |
| |
| /* Restore caller saved register. */ |
| pop rbx |
| |
| ret |
| |
| #endif /* HOST_ARCH_X64 */ |
