Signed-off-by: Ken Thomases <ken(a)codeweavers.com>
---
loader/preloader_mac.c | 48 ++++++++++++++++++++++++++++++++++++++++++------
1 file changed, 42 insertions(+), 6 deletions(-)
diff --git a/loader/preloader_mac.c b/loader/preloader_mac.c
index 1d88062..83d24af 100644
--- a/loader/preloader_mac.c
+++ b/loader/preloader_mac.c
@@ -48,6 +48,7 @@
#ifdef HAVE_MACH_O_LOADER_H
#include <mach/thread_status.h>
#include <mach-o/loader.h>
+#include <mach-o/ldsyms.h>
#endif
#include "main.h"
@@ -98,6 +99,8 @@ void __stack_chk_fail(void) { return; }
static const size_t page_size = 0x1000;
static const size_t page_mask = 0xfff;
#define target_mach_header mach_header
+#define target_segment_command segment_command
+#define TARGET_LC_SEGMENT LC_SEGMENT
#define target_thread_state_t i386_thread_state_t
#ifdef __DARWIN_UNIX03
#define target_thread_ip(x) (x)->__eip
@@ -184,6 +187,8 @@ __ASM_GLOBAL_FUNC( start,
static const size_t page_size = 0x1000;
static const size_t page_mask = 0xfff;
#define target_mach_header mach_header_64
+#define target_segment_command segment_command_64
+#define TARGET_LC_SEGMENT LC_SEGMENT_64
#define target_thread_state_t x86_thread_state64_t
#ifdef __DARWIN_UNIX03
#define target_thread_ip(x) (x)->__rip
@@ -376,6 +381,36 @@ static __attribute__((noreturn,format(printf,1,2))) void fatal_error(const char
wld_exit(1);
}
+static int preloader_overlaps_range( const void *start, const void *end )
+{
+ intptr_t slide = p_dyld_get_image_slide(&_mh_execute_header);
+ struct load_command *cmd = (struct load_command*)(&_mh_execute_header + 1);
+ int i;
+
+ for (i = 0; i < _mh_execute_header.ncmds; ++i)
+ {
+ if (cmd->cmd == TARGET_LC_SEGMENT)
+ {
+ struct target_segment_command *seg = (struct target_segment_command*)cmd;
+ const void *seg_start = (const void*)(seg->vmaddr + slide);
+ const void *seg_end = (const char*)seg_start + seg->vmsize;
+
+ if (end > seg_start && start <= seg_end)
+ {
+ char segname[sizeof(seg->segname) + 1];
+ memcpy(segname, seg->segname, sizeof(seg->segname));
+ segname[sizeof(segname) - 1] = 0;
+ wld_printf( "WINEPRELOADRESERVE range %p-%p overlaps preloader %s segment %p-%p\n",
+ start, end, segname, seg_start, seg_end );
+ return 1;
+ }
+ }
+ cmd = (struct load_command*)((char*)cmd + cmd->cmdsize);
+ }
+
+ return 0;
+}
+
/*
* preload_reserve
*
@@ -406,7 +441,8 @@ static void preload_reserve( const char *str )
else if (result) goto error; /* single value '0' is allowed */
/* sanity checks */
- if (end <= start) start = end = NULL;
+ if (end <= start || preloader_overlaps_range(start, end))
+ start = end = NULL;
/* check for overlap with low memory areas */
for (i = 0; preload_info[i].size; i++)
@@ -562,6 +598,11 @@ void *wld_start( void *stack, int *is_unix_thread )
p++;
}
+ LOAD_POSIX_DYLD_FUNC( dlopen );
+ LOAD_POSIX_DYLD_FUNC( dlsym );
+ LOAD_POSIX_DYLD_FUNC( dladdr );
+ LOAD_MACHO_DYLD_FUNC( _dyld_get_image_slide );
+
/* reserve memory that Wine needs */
if (reserve) preload_reserve( reserve );
for (i = 0; preload_info[i].size; i++)
@@ -576,11 +617,6 @@ void *wld_start( void *stack, int *is_unix_thread )
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] );
--
2.10.2