From: Sebastian Lackner sebastian@fds-team.de
Signed-off-by: Ken Thomases ken@codeweavers.com Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=33159 --- Differences from Staging version: * Don't attempt to use the --export-dynamic linker option on macOS. It's not supported. * On macOS, release part of the low memory reservation even for large-address-space aware apps. 3D games are already prone to exhausting the address space due to OpenGL resources. We don't want to exacerbate that. * Use dladdr() to find the Mach header of the loader. Eliminate some code for doing that a more roundabout way. --- Makefile.in | 1 + configure.ac | 21 ++- dlls/ntdll/virtual.c | 12 +- libs/wine/config.c | 2 +- loader/Makefile.in | 4 +- loader/main.c | 46 +----- loader/preloader.c | 436 +++++++++++++++++++++++++++++++++++++++++++++++++-- 7 files changed, 465 insertions(+), 57 deletions(-)
diff --git a/Makefile.in b/Makefile.in index 6b65fdf..40ae5ce 100644 --- a/Makefile.in +++ b/Makefile.in @@ -89,6 +89,7 @@ WINELOADER_PROGRAMS = @WINELOADER_PROGRAMS@ WINELOADER_DEPENDS = @WINELOADER_DEPENDS@ WINELOADER_INSTALL = @WINELOADER_INSTALL@ WINELOADER_LDFLAGS = @WINELOADER_LDFLAGS@ +WINEPRELOADER_LDFLAGS = @WINEPRELOADER_LDFLAGS@ LIBWINE_SHAREDLIB = @LIBWINE_SHAREDLIB@ LIBWINE_IMPORTLIB = @LIBWINE_IMPORTLIB@ LIBWINE_INSTALL_LIB = @LIBWINE_INSTALL_LIB@ diff --git a/configure.ac b/configure.ac index 294fe4b..140a783 100644 --- a/configure.ac +++ b/configure.ac @@ -715,6 +715,7 @@ AC_SUBST(LDRPATH_INSTALL,"") AC_SUBST(LDRPATH_LOCAL,"") AC_SUBST(LDEXECFLAGS,"") AC_SUBST(WINELOADER_LDFLAGS,"") +AC_SUBST(WINEPRELOADER_LDFLAGS,"") LIBEXT="so" DLLEXT=".so" IMPLIBEXT="def" @@ -775,9 +776,15 @@ case $host_os in AC_SUBST(APPLICATIONSERVICES_LIBS,"-framework ApplicationServices") AC_SUBST(CORESERVICES_LIBS,"-framework CoreServices") AC_SUBST(APPKIT_LIBS,"-framework AppKit") - WINELOADER_LDFLAGS="-image_base 0x7bf00000 -Wl,-pagezero_size,0x1000,-segaddr,WINE_DOS,0x00001000,-segaddr,WINE_SHAREDHEAP,0x7f000000,-sectcreate,__TEXT,__info_plist,wine_info.plist" + + WINELOADER_LDFLAGS="-Wl,-pie,-pagezero_size,0x1000,-sectcreate,__TEXT,__info_plist,wine_info.plist" + + WINEPRELOADER_LDFLAGS="-nostartfiles -nodefaultlibs -e _start -ldylib1.o -Wl,-image_base,0x7c400000,-pagezero_size,0x1000,-sectcreate,__TEXT,__info_plist,wine_info.plist" + WINE_TRY_CFLAGS([-Wl,-no_new_main -e _main], + [WINEPRELOADER_LDFLAGS="-Wl,-no_new_main $WINEPRELOADER_LDFLAGS"]) WINE_TRY_CFLAGS([-Wl,-no_pie], - [WINELOADER_LDFLAGS="-Wl,-no_pie $WINELOADER_LDFLAGS"]) + [WINEPRELOADER_LDFLAGS="-Wl,-no_pie $WINEPRELOADER_LDFLAGS"]) + if test "$ac_cv_header_DiskArbitration_DiskArbitration_h" = "yes" then dnl DiskArbitration API is not public on Darwin < 8.0, use it only if header found @@ -893,6 +900,7 @@ case $host_os in enable_wineandroid_drv=${enable_wineandroid_drv:-yes} WINE_TRY_CFLAGS([-fPIC -Wl,--export-dynamic], [WINELOADER_LDFLAGS="-Wl,--export-dynamic"]) + WINEPRELOADER_LDFLAGS="-static -nostartfiles -nodefaultlibs -Wl,-Ttext=0x7c400000" WINE_TRY_CFLAGS([-fPIC -Wl,--rpath,$ORIGIN/../lib], [LDRPATH_INSTALL="-Wl,--rpath,\$$ORIGIN/`$(MAKEDEP) -R ${bindir} ${libdir}`" LDRPATH_LOCAL="-Wl,--rpath,\$$ORIGIN/$(top_builddir)/libs/wine"], @@ -940,6 +948,7 @@ case $host_os in
WINE_TRY_CFLAGS([-fPIC -Wl,--export-dynamic], [WINELOADER_LDFLAGS="-Wl,--export-dynamic"]) + WINEPRELOADER_LDFLAGS="-static -nostartfiles -nodefaultlibs -Wl,-Ttext=0x7c400000"
WINE_TRY_CFLAGS([-fPIC -Wl,--rpath,$ORIGIN/../lib], [LDRPATH_INSTALL="-Wl,--rpath,\$$ORIGIN/`$(MAKEDEP) -R ${bindir} ${libdir}`" @@ -2119,6 +2128,14 @@ case $host_os in ;; esac ;; + darwin*|macosx*) + case $host_cpu in + *i[[3456789]]86*|x86_64*) + test "$wine_binary" = wine || WINE_IGNORE_FILE("loader/wine-preloader") + WINELOADER_PROGRAMS="$WINELOADER_PROGRAMS $wine_binary-preloader" + ;; + esac + ;; esac
dnl **** Check for functions **** diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c index 5dfbe74..030c658 100644 --- a/dlls/ntdll/virtual.c +++ b/dlls/ntdll/virtual.c @@ -2417,14 +2417,20 @@ void virtual_release_address_space(void) if (range.limit > range.base) { while (wine_mmap_enum_reserved_areas( free_reserved_memory, &range, 1 )) /* nothing */; +#ifdef __APPLE__ + /* On macOS, we still want to free some of low memory, for OpenGL resources */ + range.base = (char *)0x40000000; +#else + range.base = NULL; +#endif } else + range.base = (char *)0x20000000; + + if (range.base) { -#ifndef __APPLE__ /* dyld doesn't support parts of the WINE_DOS segment being unmapped */ - range.base = (char *)0x20000000; range.limit = (char *)0x7f000000; while (wine_mmap_enum_reserved_areas( free_reserved_memory, &range, 0 )) /* nothing */; -#endif }
server_leave_uninterrupted_section( &csVirtual, &sigset ); diff --git a/libs/wine/config.c b/libs/wine/config.c index 13f016a..b76519b 100644 --- a/libs/wine/config.c +++ b/libs/wine/config.c @@ -548,7 +548,7 @@ void wine_exec_wine_binary( const char *name, char **argv, const char *env_var )
if (!name) name = argv0_name; /* no name means default loader */
-#ifdef linux +#if defined(linux) || defined(__APPLE__) use_preloader = !strendswith( name, "wineserver" ); #else use_preloader = 0; diff --git a/loader/Makefile.in b/loader/Makefile.in index b1eafd1..05a7503 100644 --- a/loader/Makefile.in +++ b/loader/Makefile.in @@ -24,7 +24,7 @@ wine64_DEPS = $(WINELOADER_DEPENDS) wine64_LDFLAGS = $(WINELOADER_LDFLAGS) $(LDEXECFLAGS) -lwine $(PTHREAD_LIBS)
wine_preloader_OBJS = preloader.o -wine_preloader_LDFLAGS = -static -nostartfiles -nodefaultlibs -Wl,-Ttext=0x7c400000 +wine_preloader_LDFLAGS = $(WINEPRELOADER_LDFLAGS)
wine64_preloader_OBJS = preloader.o -wine64_preloader_LDFLAGS = -static -nostartfiles -nodefaultlibs -Wl,-Ttext=0x7c400000 +wine64_preloader_LDFLAGS = $(WINEPRELOADER_LDFLAGS) diff --git a/loader/main.c b/loader/main.c index 0a25272..f197cf8 100644 --- a/loader/main.c +++ b/loader/main.c @@ -41,44 +41,9 @@ #include "wine/library.h" #include "main.h"
-#ifdef __APPLE__ - -#ifndef __clang__ -__asm__(".zerofill WINE_DOS, WINE_DOS, ___wine_dos, 0x40000000"); -__asm__(".zerofill WINE_SHAREDHEAP, WINE_SHAREDHEAP, ___wine_shared_heap, 0x03000000"); -extern char __wine_dos[0x40000000], __wine_shared_heap[0x03000000]; -#else -__asm__(".zerofill WINE_DOS, WINE_DOS"); -__asm__(".zerofill WINE_SHAREDHEAP, WINE_SHAREDHEAP"); -static char __wine_dos[0x40000000] __attribute__((section("WINE_DOS, WINE_DOS"))); -static char __wine_shared_heap[0x03000000] __attribute__((section("WINE_SHAREDHEAP, WINE_SHAREDHEAP"))); -#endif - -static const struct wine_preload_info wine_main_preload_info[] = -{ - { __wine_dos, sizeof(__wine_dos) }, /* DOS area + PE exe */ - { __wine_shared_heap, sizeof(__wine_shared_heap) }, /* shared user data + shared heap */ - { 0, 0 } /* end of list */ -}; - -static inline void reserve_area( void *addr, size_t size ) -{ - wine_anon_mmap( addr, size, PROT_NONE, MAP_FIXED | MAP_NORESERVE ); - wine_mmap_add_reserved_area( addr, size ); -} - -#else /* __APPLE__ */ - /* the preloader will set this variable */ const struct wine_preload_info *wine_main_preload_info = NULL;
-static inline void reserve_area( void *addr, size_t size ) -{ - wine_mmap_add_reserved_area( addr, size ); -} - -#endif /* __APPLE__ */ - /*********************************************************************** * check_command_line * @@ -202,6 +167,13 @@ static int pre_exec(void) return 1; /* we have a preloader on x86-64/arm64 */ }
+#elif defined(__APPLE__) && (defined(__i386__) || defined(__x86_64__)) + +static int pre_exec(void) +{ + return 1; /* we have a preloader */ +} + #elif (defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__DragonFly__))
static int pre_exec(void) @@ -247,12 +219,10 @@ int main( int argc, char *argv[] ) } }
-#ifndef __APPLE__ if (wine_main_preload_info) -#endif { for (i = 0; wine_main_preload_info[i].size; i++) - reserve_area( wine_main_preload_info[i].addr, wine_main_preload_info[i].size ); + wine_mmap_add_reserved_area( wine_main_preload_info[i].addr, wine_main_preload_info[i].size ); }
wine_init( argc, argv, error, sizeof(error) ); diff --git a/loader/preloader.c b/loader/preloader.c index 644244b..91cac51 100644 --- a/loader/preloader.c +++ b/loader/preloader.c @@ -4,6 +4,8 @@ * Copyright (C) 1995,96,97,98,99,2000,2001,2002 Free Software Foundation, Inc. * Copyright (C) 2004 Mike McCormack for CodeWeavers * Copyright (C) 2004 Alexandre Julliard + * Copyright (C) 2017 Michael Müller + * Copyright (C) 2017 Sebastian Lackner * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public @@ -90,15 +92,13 @@ #ifdef HAVE_SYS_LINK_H # include <sys/link.h> #endif +#ifdef HAVE_MACH_O_LOADER_H +#include <mach/thread_status.h> +#include <mach-o/loader.h> +#endif
#include "main.h"
-/* ELF definitions */ -#define ELF_PREFERRED_ADDRESS(loader, maplength, mapstartpref) (mapstartpref) -#define ELF_FIXED_ADDRESS(loader, mapstart) ((void) 0) - -#define MAP_BASE_ADDR(l) 0 - #ifndef MAP_COPY #define MAP_COPY MAP_PRIVATE #endif @@ -108,21 +108,63 @@
static struct wine_preload_info preload_info[] = { +/* On macOS, we allocate the low 64k area in two steps because PAGEZERO + * might not always be available. Also, the top-down allocations area + * on x86_64 is moved because the address on Linux exceeds the maximum + * allowed user space limit. Please note that on Linux, it is better to + * allocate the low 64k as a single chunk to avoid SELinux warnings on + * systems with CONFIG_DEFAULT_MMAP_MIN_ADDR < CONFIG_LSM_MMAP_MIN_ADDR. */ +#ifdef __APPLE__ +#ifdef __i386__ + { (void *)0x00000000, 0x00001000 }, /* first page */ + { (void *)0x00001000, 0x0000f000 }, /* low 64k */ + { (void *)0x00010000, 0x00100000 }, /* DOS area */ + { (void *)0x00110000, 0x67ef0000 }, /* low memory area */ + { (void *)0x7f000000, 0x03000000 }, /* top-down allocations + shared heap + virtual heap */ +#else /* __i386__ */ + { (void *)0x000000010000, 0x00100000 }, /* DOS area */ + { (void *)0x000000110000, 0x67ef0000 }, /* low memory area */ + { (void *)0x00007ff00000, 0x000f0000 }, /* shared user data */ + { (void *)0x7fff40000000, 0x01ff0000 }, /* top-down allocations + virtual heap */ +#endif /* __i386__ */ +#else /* __APPLE__ */ #ifdef __i386__ { (void *)0x00000000, 0x00010000 }, /* low 64k */ { (void *)0x00010000, 0x00100000 }, /* DOS area */ { (void *)0x00110000, 0x67ef0000 }, /* low memory area */ { (void *)0x7f000000, 0x03000000 }, /* top-down allocations + shared heap + virtual heap */ -#else +#else /* __i386__ */ { (void *)0x000000010000, 0x00100000 }, /* DOS area */ { (void *)0x000000110000, 0x67ef0000 }, /* low memory area */ { (void *)0x00007ff00000, 0x000f0000 }, /* shared user data */ { (void *)0x7ffffe000000, 0x01ff0000 }, /* top-down allocations + virtual heap */ -#endif +#endif /* __i386__ */ +#endif /* __APPLE__ */ { 0, 0 }, /* PE exe range set with WINEPRELOADRESERVE */ { 0, 0 } /* end of list */ };
+#ifdef __APPLE__ + +#ifndef LC_MAIN +#define LC_MAIN 0x80000028 +struct entry_point_command +{ + uint32_t cmd; + uint32_t cmdsize; + uint64_t entryoff; + uint64_t stacksize; +}; +#endif + +#else /* __APPLE__ */ + +/* ELF definitions */ +#define ELF_PREFERRED_ADDRESS(loader, maplength, mapstartpref) (mapstartpref) +#define ELF_FIXED_ADDRESS(loader, mapstart) ((void) 0) + +#define MAP_BASE_ADDR(l) 0 + /* debugging */ #undef DUMP_SEGMENTS #undef DUMP_AUX_INFO @@ -168,6 +210,8 @@ struct wld_auxv } a_un; };
+#endif /* __APPLE__ */ + /* * The __bb_init_func is an empty function only called when file is * compiled with gcc flags "-fprofile-arcs -ftest-coverage". This @@ -182,6 +226,193 @@ void *__stack_chk_guard = 0; void __stack_chk_fail_local(void) { return; } void __stack_chk_fail(void) { return; }
+#ifdef __APPLE__ +#ifdef __i386__ + +static const size_t page_size = 0x1000; +static const size_t page_mask = 0xfff; +#define target_mach_header mach_header +#define target_thread_state_t i386_thread_state_t +#ifdef __DARWIN_UNIX03 +#define target_thread_ip(x) (x)->__eip +#else +#define target_thread_ip(x) (x)->eip +#endif + +#define SYSCALL_FUNC( name, nr ) \ + __ASM_GLOBAL_FUNC( name, \ + "\tmovl $" #nr ",%eax\n" \ + "\tint $0x80\n" \ + "\tjnb 1f\n" \ + "\tmovl $-1,%eax\n" \ + "1:\tret\n" ) + +#define SYSCALL_NOERR( name, nr ) \ + __ASM_GLOBAL_FUNC( name, \ + "\tmovl $" #nr ",%eax\n" \ + "\tint $0x80\n" \ + "\tret\n" ) + +__ASM_GLOBAL_FUNC( start, + __ASM_CFI("\t.cfi_undefined %eip\n") + /* The first 16 bytes are used as a function signature on i386 */ + "\t.byte 0x6a,0x00\n" /* pushl $0 */ + "\t.byte 0x89,0xe5\n" /* movl %esp,%ebp */ + "\t.byte 0x83,0xe4,0xf0\n" /* andl $-16,%esp */ + "\t.byte 0x83,0xec,0x10\n" /* subl $16,%esp */ + "\t.byte 0x8b,0x5d,0x04\n" /* movl 4(%ebp),%ebx */ + "\t.byte 0x89,0x5c,0x24,0x00\n" /* movl %ebx,0(%esp) */ + + "\tleal 4(%ebp),%eax\n" + "\tmovl %eax,0(%esp)\n" /* stack */ + "\tleal 8(%esp),%eax\n" + "\tmovl %eax,4(%esp)\n" /* &is_unix_thread */ + "\tmovl $0,(%eax)\n" + "\tcall _wld_start\n" + + "\tmovl 4(%ebp),%edi\n" + "\tdecl %edi\n" /* argc */ + "\tleal 12(%ebp),%esi\n" /* argv */ + "\tleal 4(%esi,%edi,4),%edx\n" /* env */ + "\tmovl %edx,%ecx\n" /* apple data */ + "1:\tmovl (%ecx),%ebx\n" + "\tadd $4,%ecx\n" + "\torl %ebx,%ebx\n" + "\tjnz 1b\n" + + "\tcmpl $0,8(%esp)\n" + "\tjne 2f\n" + + /* LC_MAIN */ + "\tmovl %edi,0(%esp)\n" /* argc */ + "\tmovl %esi,4(%esp)\n" /* argv */ + "\tmovl %edx,8(%esp)\n" /* env */ + "\tmovl %ecx,12(%esp)\n" /* apple data */ + "\tcall *%eax\n" + "\tmovl %eax,(%esp)\n" + "\tcall _wld_exit\n" + "\thlt\n" + + /* LC_UNIXTHREAD */ + "2:\tmovl (%ecx),%ebx\n" + "\tadd $4,%ecx\n" + "\torl %ebx,%ebx\n" + "\tjnz 2b\n" + + "\tsubl %ebp,%ecx\n" + "\tsubl $8,%ecx\n" + "\tleal 4(%ebp),%esp\n" + "\tsubl %ecx,%esp\n" + + "\tmovl %edi,(%esp)\n" /* argc */ + "\tleal 4(%esp),%edi\n" + "\tshrl $2,%ecx\n" + "\tcld\n" + "\trep; movsd\n" /* argv, ... */ + + "\tmovl $0,%ebp\n" + "\tjmpl *%eax\n" ) + +#elif defined(__x86_64__) + +static const size_t page_size = 0x1000; +static const size_t page_mask = 0xfff; +#define target_mach_header mach_header_64 +#define target_thread_state_t x86_thread_state64_t +#ifdef __DARWIN_UNIX03 +#define target_thread_ip(x) (x)->__rip +#else +#define target_thread_ip(x) (x)->rip +#endif + +#define SYSCALL_FUNC( name, nr ) \ + __ASM_GLOBAL_FUNC( name, \ + "\tmovq %rcx, %r10\n" \ + "\tmovq $(" #nr "|0x2000000),%rax\n" \ + "\tsyscall\n" \ + "\tjnb 1f\n" \ + "\tmovq $-1,%rax\n" \ + "1:\tret\n" ) + +#define SYSCALL_NOERR( name, nr ) \ + __ASM_GLOBAL_FUNC( name, \ + "\tmovq %rcx, %r10\n" \ + "\tmovq $(" #nr "|0x2000000),%rax\n" \ + "\tsyscall\n" \ + "\tret\n" ) + +__ASM_GLOBAL_FUNC( start, + __ASM_CFI("\t.cfi_undefined %rip\n") + "\tpushq $0\n" + "\tmovq %rsp,%rbp\n" + "\tandq $-16,%rsp\n" + "\tsubq $16,%rsp\n" + + "\tleaq 8(%rbp),%rdi\n" /* stack */ + "\tmovq %rsp,%rsi\n" /* &is_unix_thread */ + "\tmovq $0,(%rsi)\n" + "\tcall _wld_start\n" + + "\tmovq 8(%rbp),%rdi\n" + "\tdec %rdi\n" /* argc */ + "\tleaq 24(%rbp),%rsi\n" /* argv */ + "\tleaq 8(%rsi,%rdi,8),%rdx\n" /* env */ + "\tmovq %rdx,%rcx\n" /* apple data */ + "1:\tmovq (%rcx),%r8\n" + "\taddq $8,%rcx\n" + "\torq %r8,%r8\n" + "\tjnz 1b\n" + + "\tcmpl $0,0(%rsp)\n" + "\tjne 2f\n" + + /* LC_MAIN */ + "\taddq $16,%rsp\n" + "\tcall *%rax\n" + "\tmovq %rax,%rdi\n" + "\tcall _wld_exit\n" + "\thlt\n" + + /* LC_UNIXTHREAD */ + "2:\tmovq (%rcx),%r8\n" + "\taddq $8,%rcx\n" + "\torq %r8,%r8\n" + "\tjnz 2b\n" + + "\tsubq %rbp,%rcx\n" + "\tsubq $16,%rcx\n" + "\tleaq 8(%rbp),%rsp\n" + "\tsubq %rcx,%rsp\n" + + "\tmovq %rdi,(%rsp)\n" /* argc */ + "\tleaq 8(%rsp),%rdi\n" + "\tshrq $3,%rcx\n" + "\tcld\n" + "\trep; movsq\n" /* argv, ... */ + + "\tmovq $0,%rbp\n" + "\tjmpq *%rax\n" ) + +#else +#error preloader not implemented for this CPU +#endif + +void wld_exit( int code ) __attribute__((noreturn)); +SYSCALL_NOERR( wld_exit, 1 /* SYS_exit */ ); + +ssize_t wld_write( int fd, const void *buffer, size_t len ); +SYSCALL_FUNC( wld_write, 4 /* SYS_write */ ); + +void *wld_mmap( void *start, size_t len, int prot, int flags, int fd, off_t offset ); +SYSCALL_FUNC( wld_mmap, 197 /* SYS_mmap */ ); + +void *wld_munmap( void *start, size_t len ); +SYSCALL_FUNC( wld_munmap, 73 /* SYS_munmap */ ); + +int wld_mincore( void *addr, size_t length, unsigned char *vec ); +SYSCALL_FUNC( wld_mincore, 78 /* SYS_mincore */ ); + +#else /* __APPLE__ */ #ifdef __i386__
/* data for setting up the glibc-style thread-local storage in %gs */ @@ -536,16 +767,17 @@ SYSCALL_NOERR( wld_getegid, 177 /* SYS_getegid */ ); #else #error preloader not implemented for this CPU #endif +#endif /* __APPLE__ */
/* replacement for libc functions */
-static int wld_strcmp( const char *str1, const char *str2 ) +static inline int wld_strcmp( const char *str1, const char *str2 ) { while (*str1 && (*str1 == *str2)) { str1++; str2++; } return *str1 - *str2; }
-static int wld_strncmp( const char *str1, const char *str2, size_t len ) +static inline int wld_strncmp( const char *str1, const char *str2, size_t len ) { if (len <= 0) return 0; while ((--len > 0) && *str1 && (*str1 == *str2)) { str1++; str2++; } @@ -638,6 +870,8 @@ static __attribute__((noreturn,format(printf,1,2))) void fatal_error(const char wld_exit(1); }
+#ifndef __APPLE__ + #ifdef DUMP_AUX_INFO /* * Dump interesting bits of the ELF auxv_t structure that is passed @@ -1120,6 +1354,8 @@ found: return (void *)(symtab[idx].st_value + map->l_addr); }
+#endif /* !__APPLE__ */ + /* * preload_reserve * @@ -1151,6 +1387,7 @@ static void preload_reserve( const char *str )
/* sanity checks */ if (end <= start) start = end = NULL; +#ifndef __APPLE__ else if ((char *)end > preloader_start && (char *)start <= preloader_end) { @@ -1158,6 +1395,7 @@ static void preload_reserve( const char *str ) start, end, preloader_start, preloader_end ); start = end = NULL; } +#endif /* !__APPLE__ */
/* check for overlap with low memory areas */ for (i = 0; preload_info[i].size; i++) @@ -1182,7 +1420,7 @@ error: }
/* check if address is in one of the reserved ranges */ -static int is_addr_reserved( const void *addr ) +static inline int is_addr_reserved( const void *addr ) { int i;
@@ -1206,6 +1444,180 @@ static void remove_preload_range( int i ) } }
+#ifdef __APPLE__ + +static intptr_t (*p_dyld_get_image_slide)( const struct target_mach_header* mh ); + +#define MAKE_FUNCPTR(f) static typeof(f) * p##f +MAKE_FUNCPTR(dlopen); +MAKE_FUNCPTR(dlsym); +MAKE_FUNCPTR(dladdr); +#undef MAKE_FUNCPTR + +extern int _dyld_func_lookup( const char *dyld_func_name, void **address ); + +static void *get_entry_point( struct target_mach_header *mh, intptr_t slide, int *unix_thread ) +{ + struct entry_point_command *entry; + target_thread_state_t *state; + struct load_command *cmd; + int i; + + /* try LC_MAIN first */ + cmd = (struct load_command *)(mh + 1); + for (i = 0; i < mh->ncmds; i++) + { + if (cmd->cmd == LC_MAIN) + { + *unix_thread = FALSE; + entry = (struct entry_point_command *)cmd; + return (char *)mh + entry->entryoff; + } + cmd = (struct load_command *)((char *)cmd + cmd->cmdsize); + } + + /* then try LC_UNIXTHREAD */ + cmd = (struct load_command *)(mh + 1); + for (i = 0; i < mh->ncmds; i++) + { + if (cmd->cmd == LC_UNIXTHREAD) + { + *unix_thread = TRUE; + state = (target_thread_state_t *)((char *)cmd + 16); + return (void *)(target_thread_ip(state) + slide); + } + cmd = (struct load_command *)((char *)cmd + cmd->cmdsize); + } + + return NULL; +}; + +static int is_region_empty( struct wine_preload_info *info ) +{ + unsigned char vec[1024]; + size_t pos, size, block = 1024 * page_size; + int i; + + for (pos = 0; pos < info->size; pos += size) + { + size = (pos + block <= info->size) ? block : (info->size - pos); + if (wld_mincore( (char *)info->addr + pos, size, vec ) == -1) + { + if (size <= page_size) continue; + block = page_size; size = 0; /* retry with smaller block size */ + } + else + { + for (i = 0; i < size / page_size; i++) + if (vec[i] & 1) return 0; + } + } + + return 1; +} + +static int map_region( struct wine_preload_info *info ) +{ + int flags = MAP_PRIVATE | MAP_ANON; + void *ret; + + if (!info->addr) flags |= MAP_FIXED; + + for (;;) + { + ret = wld_mmap( info->addr, info->size, PROT_NONE, flags, -1, 0 ); + if (ret == info->addr) return 1; + if (ret != (void *)-1) wld_munmap( ret, info->size ); + if (flags & MAP_FIXED) break; + + /* Some versions of macOS ignore the address hint passed to mmap - + * use mincore() to check if its empty and then use MAP_FIXED */ + if (!is_region_empty( info )) break; + flags |= MAP_FIXED; + } + + /* don't warn for zero page */ + if (info->addr >= (void *)0x1000) + wld_printf( "preloader: Warning: failed to reserve range %p-%p\n", + info->addr, (char *)info->addr + info->size ); + return 0; +} + +static inline void get_dyld_func( const char *name, void **func ) +{ + _dyld_func_lookup( name, func ); + if (!*func) fatal_error( "Failed to get function pointer for %s\n", name ); +} + +#define LOAD_POSIX_DYLD_FUNC(f) get_dyld_func( "__dyld_" #f, (void **)&p##f ) +#define LOAD_MACHO_DYLD_FUNC(f) get_dyld_func( "_" #f, (void **)&p##f ) + +void *wld_start( void *stack, int *is_unix_thread ) +{ + struct wine_preload_info builtin_dlls = { (void *)0x7a000000, 0x02000000 }; + struct wine_preload_info **wine_main_preload_info; + char **argv, **p, *reserve = NULL; + struct target_mach_header *mh; + void *mod, *entry; + int *pargc, i; + Dl_info info; + + pargc = stack; + argv = (char **)pargc + 1; + if (*pargc < 2) fatal_error( "Usage: %s wine_binary [args]\n", argv[0] ); + + /* skip over the parameters */ + p = argv + *pargc + 1; + + /* skip over the environment */ + while (*p) + { + static const char res[] = "WINEPRELOADRESERVE="; + if (!wld_strncmp( *p, res, sizeof(res)-1 )) reserve = *p + sizeof(res) - 1; + p++; + } + + /* reserve memory that Wine needs */ + if (reserve) preload_reserve( reserve ); + for (i = 0; preload_info[i].size; i++) + { + if (!map_region( &preload_info[i] )) + { + remove_preload_range( i ); + i--; + } + } + + if (!map_region( &builtin_dlls )) + builtin_dlls.size = 0; + + LOAD_POSIX_DYLD_FUNC( dlopen ); + LOAD_POSIX_DYLD_FUNC( dlsym ); + LOAD_POSIX_DYLD_FUNC( dladdr ); + LOAD_MACHO_DYLD_FUNC( _dyld_get_image_slide ); + + /* load the main binary */ + if (!(mod = pdlopen( argv[1], RTLD_NOW ))) + fatal_error( "%s: could not load binary\n", argv[1] ); + + if (builtin_dlls.size) + wld_munmap( builtin_dlls.addr, builtin_dlls.size ); + + /* store pointer to the preload info into the appropriate main binary variable */ + wine_main_preload_info = pdlsym( mod, "wine_main_preload_info" ); + if (wine_main_preload_info) *wine_main_preload_info = preload_info; + else wld_printf( "wine_main_preload_info not found\n" ); + + if (!pdladdr( wine_main_preload_info, &info ) || !(mh = info.dli_fbase)) + fatal_error( "%s: could not find mach header\n", argv[1] ); + if (!(entry = get_entry_point( mh, p_dyld_get_image_slide(mh), is_unix_thread ))) + fatal_error( "%s: could not find entry point\n", argv[1] ); + + return entry; +} + +#else /* __APPLE__ */ + /* * is_in_preload_range * @@ -1374,3 +1786,5 @@ void* wld_start( void **stack )
return (void *)ld_so_map.l_entry; } + +#endif /* __APPLE__ */