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dbghelp: Read the Mach-O segment command corresponding to the target's architecture. 

Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zebediah Figura 2018-06-14 16:58:16 -05:00 committed by Alexandre Julliard
parent bf7681cb2f
commit 0fc3c33637
1 changed files with 50 additions and 18 deletions
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68
dlls/dbghelp/macho_module.c
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@ -89,10 +89,8 @@ WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_macho);
#ifdef _WIN64
typedef struct segment_command_64 macho_segment_command;
typedef struct nlist_64 macho_nlist;
#else
typedef struct segment_command macho_segment_command;
typedef struct nlist macho_nlist;
#endif
@ -506,12 +504,26 @@ static int macho_enum_load_commands(struct image_file_map *ifm, unsigned cmd,
*/
static int macho_count_sections(struct image_file_map* ifm, const struct load_command* lc, void* user)
{
const macho_segment_command* sc = (const macho_segment_command*)lc;
char segname[16];
uint32_t nsects;
if (ifm->addr_size == 32)
{
const struct segment_command *sc = (const struct segment_command *)lc;
memcpy(segname, sc->segname, sizeof(segname));
nsects = sc->nsects;
}
else
{
const struct segment_command_64 *sc = (const struct segment_command_64 *)lc;
memcpy(segname, sc->segname, sizeof(segname));
nsects = sc->nsects;
}
TRACE("(%p/%d, %p, %p) segment %s\n", ifm, ifm->u.macho.fd, lc, user,
debugstr_an(sc->segname, sizeof(sc->segname)));
debugstr_an(segname, sizeof(segname)));
ifm->u.macho.num_sections += sc->nsects;
ifm->u.macho.num_sections += nsects;
return 0;
}
@ -525,44 +537,64 @@ static int macho_count_sections(struct image_file_map* ifm, const struct load_co
static int macho_load_section_info(struct image_file_map* ifm, const struct load_command* lc, void* user)
{
struct macho_file_map* fmap = &ifm->u.macho;
const macho_segment_command* sc = (const macho_segment_command*)lc;
struct section_info* info = user;
BOOL ignore;
const macho_section* section;
int i;
unsigned long tmp, page_mask = sysconf( _SC_PAGESIZE ) - 1;
uint64_t vmaddr, vmsize;
char segname[16];
uint32_t nsects;
if (ifm->addr_size == 32)
{
const struct segment_command *sc = (const struct segment_command *)lc;
vmaddr = sc->vmaddr;
vmsize = sc->vmsize;
memcpy(segname, sc->segname, sizeof(segname));
nsects = sc->nsects;
section = (const macho_section*)(sc + 1);
}
else
{
const struct segment_command_64 *sc = (const struct segment_command_64 *)lc;
vmaddr = sc->vmaddr;
vmsize = sc->vmsize;
memcpy(segname, sc->segname, sizeof(segname));
nsects = sc->nsects;
section = (const macho_section*)(sc + 1);
}
TRACE("(%p/%d, %p, %p) before: 0x%08lx - 0x%08lx\n", fmap, fmap->fd, lc, user,
(unsigned long)fmap->segs_start, (unsigned long)fmap->segs_size);
TRACE("Segment command vm: 0x%08lx - 0x%08lx\n", (unsigned long)sc->vmaddr,
(unsigned long)(sc->vmaddr + sc->vmsize));
TRACE("Segment command vm: 0x%08lx - 0x%08lx\n", (unsigned long)vmaddr,
(unsigned long)(vmaddr + vmsize));
/* Images in the dyld shared cache have their segments mapped non-contiguously.
We don't know how to properly locate any of the segments other than __TEXT,
so ignore them. */
ignore = (info->split_segs && strcmp(sc->segname, SEG_TEXT));
ignore = (info->split_segs && strcmp(segname, SEG_TEXT));
if (!strncmp(sc->segname, "WINE_", 5))
TRACE("Ignoring special Wine segment %s\n", debugstr_an(sc->segname, sizeof(sc->segname)));
else if (!strncmp(sc->segname, "__PAGEZERO", 10))
if (!strncmp(segname, "WINE_", 5))
TRACE("Ignoring special Wine segment %s\n", debugstr_an(segname, sizeof(segname)));
else if (!strncmp(segname, "__PAGEZERO", 10))
TRACE("Ignoring __PAGEZERO segment\n");
else if (ignore)
TRACE("Ignoring %s segment because image has split segments\n", sc->segname);
TRACE("Ignoring %s segment because image has split segments\n", segname);
else
{
/* If this segment starts before previously-known earliest, record new earliest. */
if (sc->vmaddr < fmap->segs_start)
fmap->segs_start = sc->vmaddr;
if (vmaddr < fmap->segs_start)
fmap->segs_start = vmaddr;
/* If this segment extends beyond previously-known furthest, record new furthest. */
tmp = (sc->vmaddr + sc->vmsize + page_mask) & ~page_mask;
tmp = (vmaddr + vmsize + page_mask) & ~page_mask;
if (fmap->segs_size < tmp) fmap->segs_size = tmp;
TRACE("after: 0x%08lx - 0x%08lx\n", (unsigned long)fmap->segs_start, (unsigned long)fmap->segs_size);
}
section = (const macho_section*)(sc + 1);
for (i = 0; i < sc->nsects; i++)
for (i = 0; i < nsects; i++)
{
fmap->sect[info->section_index].section = &section[i];
fmap->sect[info->section_index].mapped = IMAGE_NO_MAP;