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ntdll: Preserve rbx register when calling DLL entry point on x64.
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@ -264,7 +264,7 @@ void WINAPI RtlGetUnloadEventTraceEx(ULONG **size, ULONG **count, void **trace)
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* that only modifying esi leads to a crash, so use this one to backup
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* ebp while running the dll entry proc.
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*/
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#ifdef __i386__
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#if defined(__i386__)
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extern BOOL call_dll_entry_point( DLLENTRYPROC proc, void *module, UINT reason, void *reserved );
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__ASM_GLOBAL_FUNC(call_dll_entry_point,
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"pushl %ebp\n\t"
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@ -298,13 +298,36 @@ __ASM_GLOBAL_FUNC(call_dll_entry_point,
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__ASM_CFI(".cfi_def_cfa %esp,4\n\t")
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__ASM_CFI(".cfi_same_value %ebp\n\t")
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"ret" )
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#else /* __i386__ */
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#elif defined(__x86_64__)
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extern BOOL CDECL call_dll_entry_point( DLLENTRYPROC proc, void *module, UINT reason, void *reserved );
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/* Some apps modify rbx in TLS entry point. */
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__ASM_GLOBAL_FUNC(call_dll_entry_point,
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"pushq %rbx\n\t"
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__ASM_SEH(".seh_pushreg %rbx\n\t")
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__ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
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__ASM_CFI(".cfi_rel_offset %rbx,0\n\t")
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"subq $48,%rsp\n\t"
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__ASM_SEH(".seh_stackalloc 48\n\t")
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__ASM_SEH(".seh_endprologue\n\t")
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__ASM_CFI(".cfi_adjust_cfa_offset 48\n\t")
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"mov %rcx,%r10\n\t"
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"mov %rdx,%rcx\n\t"
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"mov %r8d,%edx\n\t"
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"mov %r9,%r8\n\t"
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"call *%r10\n\t"
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"addq $48,%rsp\n\t"
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__ASM_CFI(".cfi_adjust_cfa_offset -48\n\t")
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"popq %rbx\n\t"
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__ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
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__ASM_CFI(".cfi_same_value %rbx\n\t")
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"ret" )
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#else
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static inline BOOL call_dll_entry_point( DLLENTRYPROC proc, void *module,
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UINT reason, void *reserved )
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{
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return proc( module, reason, reserved );
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}
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#endif /* __i386__ */
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#endif
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#if defined(__i386__) || defined(__x86_64__) || defined(__arm__) || defined(__aarch64__)
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