Brendan Shanks : ntdll: Fix macOS build error with LLVM 17.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 295d521b11644fb76c36854336b13c2155bb7d79
URL:    https://gitlab.winehq.org/wine/wine/-/commit/295d521b11644fb76c36854336b13c2...

Author: Brendan Shanks <bshanks(a)codeweavers.com>
Date:   Wed Nov 29 11:28:38 2023 -0800

ntdll: Fix macOS build error with LLVM 17.

LLVM no longer allows non-private labels to appear between
.cfi_startproc/endproc when targeting Mach-O.

Based on a patch by Jacek Caban.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55863

---

 dlls/ntdll/unix/signal_x86_64.c | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/dlls/ntdll/unix/signal_x86_64.c b/dlls/ntdll/unix/signal_x86_64.c
index ea177982d05..0c291633ac6 100644
--- a/dlls/ntdll/unix/signal_x86_64.c
+++ b/dlls/ntdll/unix/signal_x86_64.c
@@ -1892,15 +1892,15 @@ static BOOL handle_syscall_trap( ucontext_t *sigcontext )
 
     if ((void *)RIP_sig( sigcontext ) == __wine_syscall_dispatcher)
     {
-        extern void __wine_syscall_dispatcher_prolog_end(void);
+        extern const void *__wine_syscall_dispatcher_prolog_end_ptr;
 
-        RIP_sig( sigcontext ) = (ULONG64)__wine_syscall_dispatcher_prolog_end;
+        RIP_sig( sigcontext ) = (ULONG64)__wine_syscall_dispatcher_prolog_end_ptr;
     }
     else if ((void *)RIP_sig( sigcontext ) == __wine_unix_call_dispatcher)
     {
-        extern void __wine_unix_call_dispatcher_prolog_end(void);
+        extern const void *__wine_unix_call_dispatcher_prolog_end_ptr;
 
-        RIP_sig( sigcontext ) = (ULONG64)__wine_unix_call_dispatcher_prolog_end;
+        RIP_sig( sigcontext ) = (ULONG64)__wine_unix_call_dispatcher_prolog_end_ptr;
         R10_sig( sigcontext ) = RCX_sig( sigcontext );
     }
     else return FALSE;
@@ -2607,8 +2607,7 @@ __ASM_GLOBAL_FUNC( __wine_syscall_dispatcher,
                    "popq 0x80(%rcx)\n\t"
                    __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
                    "movl $0,0xb4(%rcx)\n\t"        /* frame->restore_flags */
-                   ".globl " __ASM_NAME("__wine_syscall_dispatcher_prolog_end") "\n"
-                   __ASM_NAME("__wine_syscall_dispatcher_prolog_end") ":\n\t"
+                   __ASM_LOCAL_LABEL("__wine_syscall_dispatcher_prolog_end") ":\n\t"
                    "movq %rax,0x00(%rcx)\n\t"
                    "movq %rbx,0x08(%rcx)\n\t"
                    __ASM_CFI_REG_IS_AT1(rbx, rcx, 0x08)
@@ -2844,8 +2843,7 @@ __ASM_GLOBAL_FUNC( __wine_unix_call_dispatcher,
                    __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
                    __ASM_CFI_REG_IS_AT2(rip, rcx, 0xf0,0x00)
                    "movl $0,0xb4(%rcx)\n\t"        /* frame->restore_flags */
-                   ".globl " __ASM_NAME("__wine_unix_call_dispatcher_prolog_end") "\n"
-                   __ASM_NAME("__wine_unix_call_dispatcher_prolog_end") ":\n\t"
+                   __ASM_LOCAL_LABEL("__wine_unix_call_dispatcher_prolog_end") ":\n\t"
                    "movq %rbx,0x08(%rcx)\n\t"
                    __ASM_CFI_REG_IS_AT1(rbx, rcx, 0x08)
                    "movq %rsi,0x20(%rcx)\n\t"
@@ -2943,6 +2941,14 @@ __ASM_GLOBAL_FUNC( __wine_unix_call_dispatcher,
                    __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
                    "ret" )
 
+asm( ".data\n\t"
+     ".globl " __ASM_NAME("__wine_syscall_dispatcher_prolog_end_ptr") "\n"
+     __ASM_NAME("__wine_syscall_dispatcher_prolog_end_ptr") ":\n\t"
+     ".quad " __ASM_LOCAL_LABEL("__wine_syscall_dispatcher_prolog_end") "\n\t"
+     ".globl " __ASM_NAME("__wine_unix_call_dispatcher_prolog_end_ptr") "\n"
+     __ASM_NAME("__wine_unix_call_dispatcher_prolog_end_ptr") ":\n\t"
+     ".quad " __ASM_LOCAL_LABEL("__wine_unix_call_dispatcher_prolog_end") "\n\t"
+     ".text\n\t" );
 
 /***********************************************************************
  *           __wine_setjmpex