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loader: In macOS preloader, add __program_vars section.

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This is needed to be a correct macOS 10.7 binary.
This commit is contained in:
Brendan Shanks 2023-04-06 12:08:49 -07:00 committed by Alexandre Julliard
parent cfa0dd9dd9
commit 4e6dbf3b9e
1 changed files with 43 additions and 4 deletions
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47
loader/preloader_mac.c
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@ -106,6 +106,39 @@ void *__stack_chk_guard = 0;
void __stack_chk_fail_local(void) { return; }
void __stack_chk_fail(void) { return; }
/* Binaries targeting 10.6 and 10.7 contain the __program_vars section, and
* dyld4 (starting in Monterey) does not like it to be missing:
* - running vmmap on a Wine process prints this warning:
* "Process exists but has not fully started -- dyld has initialized but libSystem has not"
* - because libSystem is not initialized, dlerror() always returns NULL (causing GStreamer
* to crash on init).
* - starting with macOS Sonoma, Wine crashes on launch if libSystem is not initialized.
*
* Adding __program_vars fixes those issues, and also allows more of the vars to
* be set correctly by the preloader for the loaded binary.
*
* See also:
* <https://github.com/apple-oss-distributions/Csu/blob/Csu-88/crt.c#L42>
* <https://github.com/apple-oss-distributions/dyld/blob/dyld-1042.1/common/MachOAnalyzer.cpp#L2185>
*/
int NXArgc = 0;
const char** NXArgv = NULL;
const char** environ = NULL;
const char* __progname = NULL;
extern void* __dso_handle;
struct ProgramVars
{
void* mh;
int* NXArgcPtr;
const char*** NXArgvPtr;
const char*** environPtr;
const char** __prognamePtr;
};
__attribute__((used)) static struct ProgramVars pvars
__attribute__ ((section ("__DATA,__program_vars"))) = { &__dso_handle, &NXArgc, &NXArgv, &environ, &__progname };
/*
* When 'start' is called, stack frame looks like:
*
@ -620,15 +653,16 @@ static void fixup_stack( void *stack )
static void set_program_vars( void *stack, void *mod )
{
int *pargc;
char **argv, **env;
const char **argv, **env;
int *wine_NXArgc = pdlsym( mod, "NXArgc" );
char ***wine_NXArgv = pdlsym( mod, "NXArgv" );
char ***wine_environ = pdlsym( mod, "environ" );
const char ***wine_NXArgv = pdlsym( mod, "NXArgv" );
const char ***wine_environ = pdlsym( mod, "environ" );
pargc = stack;
argv = (char **)pargc + 1;
argv = (const char **)pargc + 1;
env = &argv[*pargc-1] + 2;
/* set vars in the loaded binary */
if (wine_NXArgc)
*wine_NXArgc = *pargc;
else
@ -643,6 +677,11 @@ static void set_program_vars( void *stack, void *mod )
*wine_environ = env;
else
wld_printf( "preloader: Warning: failed to set environ\n" );
/* set vars in the __program_vars section */
NXArgc = *pargc;
NXArgv = argv;
environ = env;
}
void *wld_start( void *stack, int *is_unix_thread )