Module: wine Branch: master Commit: cbb57052163d05a14d3d8cf25fee08eea6660142 URL: http://source.winehq.org/git/wine.git/?a=commit;h=cbb57052163d05a14d3d8cf25f...
Author: Sebastian Lackner sebastian@fds-team.de Date: Tue Oct 20 05:53:46 2015 +0200
ntdll: Use wrapper function for consolidate callback on x86_64.
Signed-off-by: Sebastian Lackner sebastian@fds-team.de Signed-off-by: Alexandre Julliard julliard@winehq.org
---
dlls/ntdll/signal_x86_64.c | 63 ++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 61 insertions(+), 2 deletions(-)
diff --git a/dlls/ntdll/signal_x86_64.c b/dlls/ntdll/signal_x86_64.c index 575a770..524de68 100644 --- a/dlls/ntdll/signal_x86_64.c +++ b/dlls/ntdll/signal_x86_64.c @@ -3288,6 +3288,64 @@ static void call_teb_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT * }
+/********************************************************************** + * call_consolidate_callback + * + * Wrapper function to call a consolidate callback from a fake frame. + * If the callback executes RtlUnwindEx (like for example done in C++ handlers), + * we have to skip all frames which were already processed. To do that we + * trick the unwinding functions into thinking the call came from somewhere + * else. All CFI instructions are either DW_CFA_def_cfa_expression or + * DW_CFA_expression, and the expressions have the following format: + * + * DW_OP_breg6; sleb128 0x10 | Load %rbp + 0x10 + * DW_OP_deref | Get *(%rbp + 0x10) == context + * DW_OP_plus_uconst; uleb128 <OFFSET> | Add offset to get struct member + * [DW_OP_deref] | Dereference, only for CFA + */ +extern void * WINAPI call_consolidate_callback( CONTEXT *context, + void *(CALLBACK *callback)(EXCEPTION_RECORD *), + EXCEPTION_RECORD *rec ); +__ASM_GLOBAL_FUNC( call_consolidate_callback, + "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") + "subq $0x20,%rsp\n\t" + "movq %rcx,0x10(%rbp)\n\t" + __ASM_CFI(".cfi_remember_state\n\t") + __ASM_CFI(".cfi_escape 0x0f,0x07,0x76,0x10,0x06,0x23,0x98,0x01,0x06\n\t") /* CFA */ + __ASM_CFI(".cfi_escape 0x10,0x03,0x06,0x76,0x10,0x06,0x23,0x90,0x01\n\t") /* %rbx */ + __ASM_CFI(".cfi_escape 0x10,0x04,0x06,0x76,0x10,0x06,0x23,0xa8,0x01\n\t") /* %rsi */ + __ASM_CFI(".cfi_escape 0x10,0x05,0x06,0x76,0x10,0x06,0x23,0xb0,0x01\n\t") /* %rdi */ + __ASM_CFI(".cfi_escape 0x10,0x06,0x06,0x76,0x10,0x06,0x23,0xa0,0x01\n\t") /* %rbp */ + __ASM_CFI(".cfi_escape 0x10,0x0c,0x06,0x76,0x10,0x06,0x23,0xd8,0x01\n\t") /* %r12 */ + __ASM_CFI(".cfi_escape 0x10,0x0d,0x06,0x76,0x10,0x06,0x23,0xe0,0x01\n\t") /* %r13 */ + __ASM_CFI(".cfi_escape 0x10,0x0e,0x06,0x76,0x10,0x06,0x23,0xe8,0x01\n\t") /* %r14 */ + __ASM_CFI(".cfi_escape 0x10,0x0f,0x06,0x76,0x10,0x06,0x23,0xf0,0x01\n\t") /* %r15 */ + __ASM_CFI(".cfi_escape 0x10,0x10,0x06,0x76,0x10,0x06,0x23,0xf8,0x01\n\t") /* %rip */ + __ASM_CFI(".cfi_escape 0x10,0x17,0x06,0x76,0x10,0x06,0x23,0x80,0x04\n\t") /* %xmm6 */ + __ASM_CFI(".cfi_escape 0x10,0x18,0x06,0x76,0x10,0x06,0x23,0x90,0x04\n\t") /* %xmm7 */ + __ASM_CFI(".cfi_escape 0x10,0x19,0x06,0x76,0x10,0x06,0x23,0xa0,0x04\n\t") /* %xmm8 */ + __ASM_CFI(".cfi_escape 0x10,0x1a,0x06,0x76,0x10,0x06,0x23,0xb0,0x04\n\t") /* %xmm9 */ + __ASM_CFI(".cfi_escape 0x10,0x1b,0x06,0x76,0x10,0x06,0x23,0xc0,0x04\n\t") /* %xmm10 */ + __ASM_CFI(".cfi_escape 0x10,0x1c,0x06,0x76,0x10,0x06,0x23,0xd0,0x04\n\t") /* %xmm11 */ + __ASM_CFI(".cfi_escape 0x10,0x1d,0x06,0x76,0x10,0x06,0x23,0xe0,0x04\n\t") /* %xmm12 */ + __ASM_CFI(".cfi_escape 0x10,0x1e,0x06,0x76,0x10,0x06,0x23,0xf0,0x04\n\t") /* %xmm13 */ + __ASM_CFI(".cfi_escape 0x10,0x1f,0x06,0x76,0x10,0x06,0x23,0x80,0x05\n\t") /* %xmm14 */ + __ASM_CFI(".cfi_escape 0x10,0x20,0x06,0x76,0x10,0x06,0x23,0x90,0x05\n\t") /* %xmm15 */ + "movq %r8,%rcx\n\t" + "callq *%rdx\n\t" + __ASM_CFI(".cfi_restore_state\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") + + /******************************************************************* * RtlUnwindEx (NTDLL.@) */ @@ -3474,8 +3532,9 @@ void WINAPI RtlUnwindEx( PVOID end_frame, PVOID target_ip, EXCEPTION_RECORD *rec else if (rec->ExceptionCode == STATUS_UNWIND_CONSOLIDATE && rec->NumberParameters >= 1) { PVOID (CALLBACK *consolidate)(EXCEPTION_RECORD *) = (void *)rec->ExceptionInformation[0]; - TRACE( "calling consolidate callback %p\n", consolidate ); - target_ip = consolidate( rec ); + TRACE( "calling consolidate callback %p (rec=%p)\n", consolidate, rec ); + target_ip = call_consolidate_callback( context, consolidate, rec ); + TRACE( "-> target=%p\n", target_ip ); } context->Rax = (ULONG64)retval; context->Rip = (ULONG64)target_ip;