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ntdll: Reimplement the x86_64 relay entry point in assembler.

oldstable
Alexandre Julliard 2013-05-23 11:50:46 +02:00
parent fb75238f7e
commit 45a2cf1e22
1 changed files with 35 additions and 24 deletions
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59
dlls/ntdll/relay.c
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@ -592,27 +592,36 @@ static void WINAPI relay_call_regs( struct relay_descr *descr, INT_PTR idx, INT_
#elif defined(__x86_64__)
extern LONGLONG CDECL call_entry_point( void *func, int nb_args, const INT_PTR *args, int flags );
__ASM_GLOBAL_FUNC( call_entry_point,
extern void * WINAPI relay_call( struct relay_descr *descr, unsigned int idx, const INT_PTR *stack );
__ASM_GLOBAL_FUNC( relay_call,
"pushq %rbp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
__ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
"movq %rsp,%rbp\n\t"
__ASM_CFI(".cfi_def_cfa_register %rbp\n\t")
"pushq %rsi\n\t"
__ASM_CFI(".cfi_rel_offset %rsi,-8\n\t")
"pushq %rdi\n\t"
__ASM_CFI(".cfi_rel_offset %rdi,-16\n\t")
"movq %rcx,%rax\n\t"
"subq $0x30,%rsp\n\t"
"movq %rsi,0x20(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %rsi,-16\n\t")
"movq %rdi,0x28(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %rdi,-8\n\t")
/* trace the parameters */
"movq %rcx,0x10(%rbp)\n\t"
"movq %rdx,0x18(%rbp)\n\t"
"movq %r8,0x20(%rbp)\n\t"
"call " __ASM_NAME("relay_trace_entry") "\n\t"
/* copy the arguments */
"movzbq 0x1a(%rbp),%rdx\n\t" /* number of args */
"movq $4,%rcx\n\t"
"cmp %rcx,%rdx\n\t"
"cmovgq %rdx,%rcx\n\t"
"leaq 0(,%rcx,8),%rdx\n\t"
"leaq -16(,%rcx,8),%rdx\n\t"
"andq $~15,%rdx\n\t"
"subq %rdx,%rsp\n\t"
"andq $~15,%rsp\n\t"
"movq 0x20(%rbp),%r8\n\t" /* original stack */
"leaq 8(%r8),%rsi\n\t"
"movq %rsp,%rdi\n\t"
"movq %r8,%rsi\n\t"
"rep; movsq\n\t"
/* call the entry point */
"movq 0(%rsp),%rcx\n\t"
"movq 8(%rsp),%rdx\n\t"
"movq 16(%rsp),%r8\n\t"
@ -622,27 +631,29 @@ __ASM_GLOBAL_FUNC( call_entry_point,
"movq %r8,%xmm2\n\t"
"movq %r9,%xmm3\n\t"
"callq *%rax\n\t"
"leaq -16(%rbp),%rsp\n\t"
"popq %rdi\n\t"
__ASM_CFI(".cfi_same_value %rdi\n\t")
"popq %rsi\n\t"
/* trace the return value */
"leaq -0x30(%rbp),%rsp\n\t"
"movq 0x10(%rbp),%rcx\n\t"
"movq 0x18(%rbp),%rdx\n\t"
"movq 0x20(%rbp),%r8\n\t"
"movq %rax,%rsi\n\t"
"movaps %xmm0,0x10(%rbp)\n\t"
"movq %rax,%r9\n\t"
"call " __ASM_NAME("relay_trace_exit") "\n\t"
/* restore return value and return */
"movq %rsi,%rax\n\t"
"movaps 0x10(%rbp),%xmm0\n\t"
"movq 0x20(%rsp),%rsi\n\t"
__ASM_CFI(".cfi_same_value %rsi\n\t")
"movq 0x28(%rsp),%rdi\n\t"
__ASM_CFI(".cfi_same_value %rdi\n\t")
"movq %rbp,%rsp\n\t"
__ASM_CFI(".cfi_def_cfa_register %rsp\n\t")
"popq %rbp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
__ASM_CFI(".cfi_same_value %rbp\n\t")
"ret")
static LONGLONG WINAPI relay_call( struct relay_descr *descr, unsigned int idx, const INT_PTR *stack )
{
BYTE nb_args = LOBYTE(HIWORD(idx));
BYTE flags = HIBYTE(HIWORD(idx));
void *func = relay_trace_entry( descr, idx, stack );
LONGLONG ret = call_entry_point( func, nb_args, stack + 1, flags );
relay_trace_exit( descr, idx, stack, ret );
return ret;
}
static void WINAPI relay_call_regs( struct relay_descr *descr, INT_PTR idx, INT_PTR *stack )
{
assert(0); /* should never be called */