diff options
Diffstat (limited to 'js/src/ctypes/libffi/src/x86/win64.S')
| -rw-r--r-- | js/src/ctypes/libffi/src/x86/win64.S | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/js/src/ctypes/libffi/src/x86/win64.S b/js/src/ctypes/libffi/src/x86/win64.S new file mode 100644 index 0000000000..a54459f077 --- /dev/null +++ b/js/src/ctypes/libffi/src/x86/win64.S @@ -0,0 +1,238 @@ +#ifdef __x86_64__ +#define LIBFFI_ASM +#include <fficonfig.h> +#include <ffi.h> +#include <ffi_cfi.h> +#include "asmnames.h" + +#if defined(HAVE_AS_CFI_PSEUDO_OP) + .cfi_sections .debug_frame +#endif + +#ifdef X86_WIN64 +#define SEH(...) __VA_ARGS__ +#define arg0 %rcx +#define arg1 %rdx +#define arg2 %r8 +#define arg3 %r9 +#else +#define SEH(...) +#define arg0 %rdi +#define arg1 %rsi +#define arg2 %rdx +#define arg3 %rcx +#endif + +/* This macro allows the safe creation of jump tables without an + actual table. The entry points into the table are all 8 bytes. + The use of ORG asserts that we're at the correct location. */ +/* ??? The clang assembler doesn't handle .org with symbolic expressions. */ +#if defined(__clang__) || defined(__APPLE__) || (defined (__sun__) && defined(__svr4__)) +# define E(BASE, X) .balign 8 +#else +# define E(BASE, X) .balign 8; .org BASE + (X) * 8 +#endif + + .text + +/* ffi_call_win64 (void *stack, struct win64_call_frame *frame, void *r10) + + Bit o trickiness here -- FRAME is the base of the stack frame + for this function. This has been allocated by ffi_call. We also + deallocate some of the stack that has been alloca'd. */ + + .align 8 + .globl C(ffi_call_win64) + FFI_HIDDEN(C(ffi_call_win64)) + + SEH(.seh_proc ffi_call_win64) +C(ffi_call_win64): + cfi_startproc + /* Set up the local stack frame and install it in rbp/rsp. */ + movq (%rsp), %rax + movq %rbp, (arg1) + movq %rax, 8(arg1) + movq arg1, %rbp + cfi_def_cfa(%rbp, 16) + cfi_rel_offset(%rbp, 0) + SEH(.seh_pushreg %rbp) + SEH(.seh_setframe %rbp, 0) + SEH(.seh_endprologue) + movq arg0, %rsp + + movq arg2, %r10 + + /* Load all slots into both general and xmm registers. */ + movq (%rsp), %rcx + movsd (%rsp), %xmm0 + movq 8(%rsp), %rdx + movsd 8(%rsp), %xmm1 + movq 16(%rsp), %r8 + movsd 16(%rsp), %xmm2 + movq 24(%rsp), %r9 + movsd 24(%rsp), %xmm3 + + call *16(%rbp) + + movl 24(%rbp), %ecx + movq 32(%rbp), %r8 + leaq 0f(%rip), %r10 + cmpl $FFI_TYPE_SMALL_STRUCT_4B, %ecx + leaq (%r10, %rcx, 8), %r10 + ja 99f + jmp *%r10 + +/* Below, we're space constrained most of the time. Thus we eschew the + modern "mov, pop, ret" sequence (5 bytes) for "leave, ret" (2 bytes). */ +.macro epilogue + leaveq + cfi_remember_state + cfi_def_cfa(%rsp, 8) + cfi_restore(%rbp) + ret + cfi_restore_state +.endm + + .align 8 +0: +E(0b, FFI_TYPE_VOID) + epilogue +E(0b, FFI_TYPE_INT) + movslq %eax, %rax + movq %rax, (%r8) + epilogue +E(0b, FFI_TYPE_FLOAT) + movss %xmm0, (%r8) + epilogue +E(0b, FFI_TYPE_DOUBLE) + movsd %xmm0, (%r8) + epilogue +// FFI_TYPE_LONGDOUBLE may be FFI_TYPE_DOUBLE but we need a different value here. +E(0b, FFI_TYPE_DOUBLE + 1) + call PLT(C(abort)) +E(0b, FFI_TYPE_UINT8) + movzbl %al, %eax + movq %rax, (%r8) + epilogue +E(0b, FFI_TYPE_SINT8) + movsbq %al, %rax + jmp 98f +E(0b, FFI_TYPE_UINT16) + movzwl %ax, %eax + movq %rax, (%r8) + epilogue +E(0b, FFI_TYPE_SINT16) + movswq %ax, %rax + jmp 98f +E(0b, FFI_TYPE_UINT32) + movl %eax, %eax + movq %rax, (%r8) + epilogue +E(0b, FFI_TYPE_SINT32) + movslq %eax, %rax + movq %rax, (%r8) + epilogue +E(0b, FFI_TYPE_UINT64) +98: movq %rax, (%r8) + epilogue +E(0b, FFI_TYPE_SINT64) + movq %rax, (%r8) + epilogue +E(0b, FFI_TYPE_STRUCT) + epilogue +E(0b, FFI_TYPE_POINTER) + movq %rax, (%r8) + epilogue +E(0b, FFI_TYPE_COMPLEX) + call PLT(C(abort)) +E(0b, FFI_TYPE_SMALL_STRUCT_1B) + movb %al, (%r8) + epilogue +E(0b, FFI_TYPE_SMALL_STRUCT_2B) + movw %ax, (%r8) + epilogue +E(0b, FFI_TYPE_SMALL_STRUCT_4B) + movl %eax, (%r8) + epilogue + + .align 8 +99: call PLT(C(abort)) + + epilogue + + cfi_endproc + SEH(.seh_endproc) + + +/* 32 bytes of outgoing register stack space, 8 bytes of alignment, + 16 bytes of result, 32 bytes of xmm registers. */ +#define ffi_clo_FS (32+8+16+32) +#define ffi_clo_OFF_R (32+8) +#define ffi_clo_OFF_X (32+8+16) + + .align 8 + .globl C(ffi_go_closure_win64) + FFI_HIDDEN(C(ffi_go_closure_win64)) + + SEH(.seh_proc ffi_go_closure_win64) +C(ffi_go_closure_win64): + cfi_startproc + /* Save all integer arguments into the incoming reg stack space. */ + movq %rcx, 8(%rsp) + movq %rdx, 16(%rsp) + movq %r8, 24(%rsp) + movq %r9, 32(%rsp) + + movq 8(%r10), %rcx /* load cif */ + movq 16(%r10), %rdx /* load fun */ + movq %r10, %r8 /* closure is user_data */ + jmp 0f + cfi_endproc + SEH(.seh_endproc) + + .align 8 + .globl C(ffi_closure_win64) + FFI_HIDDEN(C(ffi_closure_win64)) + + SEH(.seh_proc ffi_closure_win64) +C(ffi_closure_win64): + cfi_startproc + /* Save all integer arguments into the incoming reg stack space. */ + movq %rcx, 8(%rsp) + movq %rdx, 16(%rsp) + movq %r8, 24(%rsp) + movq %r9, 32(%rsp) + + movq FFI_TRAMPOLINE_SIZE(%r10), %rcx /* load cif */ + movq FFI_TRAMPOLINE_SIZE+8(%r10), %rdx /* load fun */ + movq FFI_TRAMPOLINE_SIZE+16(%r10), %r8 /* load user_data */ +0: + subq $ffi_clo_FS, %rsp + cfi_adjust_cfa_offset(ffi_clo_FS) + SEH(.seh_stackalloc ffi_clo_FS) + SEH(.seh_endprologue) + + /* Save all sse arguments into the stack frame. */ + movsd %xmm0, ffi_clo_OFF_X(%rsp) + movsd %xmm1, ffi_clo_OFF_X+8(%rsp) + movsd %xmm2, ffi_clo_OFF_X+16(%rsp) + movsd %xmm3, ffi_clo_OFF_X+24(%rsp) + + leaq ffi_clo_OFF_R(%rsp), %r9 + call PLT(C(ffi_closure_win64_inner)) + + /* Load the result into both possible result registers. */ + movq ffi_clo_OFF_R(%rsp), %rax + movsd ffi_clo_OFF_R(%rsp), %xmm0 + + addq $ffi_clo_FS, %rsp + cfi_adjust_cfa_offset(-ffi_clo_FS) + ret + + cfi_endproc + SEH(.seh_endproc) +#endif /* __x86_64__ */ + +#if defined __ELF__ && defined __linux__ + .section .note.GNU-stack,"",@progbits +#endif |