Alexandre Julliard : ntdll: Reimplement the x86_64 relay entry point in assembler.
Module: wine Branch: master Commit: 45a2cf1e227de2408fa9c3222a6cffe5182048a6 URL: http://source.winehq.org/git/wine.git/?a=commit;h=45a2cf1e227de2408fa9c3222a... Author: Alexandre Julliard <julliard(a)winehq.org> Date: Thu May 23 11:50:46 2013 +0200 ntdll: Reimplement the x86_64 relay entry point in assembler. --- dlls/ntdll/relay.c | 59 ++++++++++++++++++++++++++++++--------------------- 1 files changed, 35 insertions(+), 24 deletions(-) diff --git a/dlls/ntdll/relay.c b/dlls/ntdll/relay.c index 6736d0f..b6790da 100644 --- a/dlls/ntdll/relay.c +++ b/dlls/ntdll/relay.c @@ -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 */
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Alexandre Julliard