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(merge) macOS11+ dynamic linker support

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This commit is contained in:
Sushant Pandurangi 2021-07-06 22:54:28 +02:00
commit 588d64c538
3 changed files with 160 additions and 22 deletions
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51
libtcc.c
View File

@ -855,6 +855,29 @@ LIBTCCAPI void tcc_delete(TCCState *s1)
#endif
}
/* Looks for the active developer SDK set by xcode-select (or the default
one set during installation.) */
#define SZPAIR(s) s "", sizeof(s)-1
ST_FUNC int tcc_add_macos_sdkpath(TCCState* s)
{
char *sdkroot = NULL, *pos = NULL;
void* xcs = dlopen("libxcselect.dylib", RTLD_GLOBAL | RTLD_LAZY);
CString path = {};
int (*f)(unsigned int, char**) = dlsym(xcs, "xcselect_host_sdk_path");
if (f) f(1, &sdkroot);
if (!sdkroot) return -1;
pos = strstr(sdkroot,"SDKs/MacOSX");
if (!pos) return -1;
cstr_cat(&path, sdkroot, pos-sdkroot);
cstr_cat(&path, SZPAIR("SDKs/MacOSX.sdk/usr/lib\0") );
tcc_add_library_path(s, (char*)path.data);
cstr_free(&path);
tcc_free(sdkroot);
return 0;
}
#undef SZPAIR
LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
{
s->output_type = output_type;
@ -881,7 +904,11 @@ LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
}
tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
#ifdef TCC_TARGET_MACHO
if (tcc_add_macos_sdkpath(s) != 0) {
tcc_add_library_path(s, CONFIG_OSX_SDK_FALLBACK);
}
#endif
#ifdef TCC_TARGET_PE
# ifdef _WIN32
if (!s->nostdlib && output_type != TCC_OUTPUT_OBJ)
@ -979,6 +1006,10 @@ static int tcc_glob_so(TCCState *s1, const char *pattern, char *buf, int size)
}
#endif
#ifdef TCC_TARGET_MACHO
ST_FUNC const char* macho_tbd_soname(const char* filename);
#endif
ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
{
int fd, ret = -1;
@ -1006,7 +1037,9 @@ ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
lseek(fd, 0, SEEK_SET);
#ifdef TCC_TARGET_MACHO
if (0 == obj_type && 0 == strcmp(tcc_fileextension(filename), ".dylib"))
if (0 == obj_type
&& (0 == strcmp(tcc_fileextension(filename), ".dylib")
|| 0 == strcmp(tcc_fileextension(filename), ".tbd")))
obj_type = AFF_BINTYPE_DYN;
#endif
@ -1027,9 +1060,15 @@ ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
case AFF_BINTYPE_DYN:
if (s1->output_type == TCC_OUTPUT_MEMORY) {
#ifdef TCC_IS_NATIVE
void *dl = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
void* dl;
const char* soname = filename;
# ifdef TCC_TARGET_MACHO
if (!strcmp(tcc_fileextension(filename), ".tbd"))
soname = macho_tbd_soname(filename);
# endif
dl = dlopen(soname, RTLD_GLOBAL | RTLD_LAZY);
if (dl) {
tcc_add_dllref(s1, filename)->handle = dl;
tcc_add_dllref(s1, soname)->handle = dl;
ret = 0;
}
#endif
@ -1142,8 +1181,8 @@ LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
static const char * const libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
const char * const *pp = s->static_link ? libs + 4 : libs;
#elif defined TCC_TARGET_MACHO
static const char * const libs[] = { "%s/lib%s.dylib", "%s/lib%s.a", NULL };
const char * const *pp = s->static_link ? libs + 1 : libs;
static const char * const libs[] = { "%s/lib%s.dylib", "%s/lib%s.tbd", "%s/lib%s.a", NULL };
const char * const *pp = s->static_link ? libs + 2 : libs;
#elif defined TARGETOS_OpenBSD
static const char * const libs[] = { "%s/lib%s.so.*", "%s/lib%s.a", NULL };
const char * const *pp = s->static_link ? libs + 1 : libs;

10
tcc.h
View File

@ -42,6 +42,7 @@
#ifndef _WIN32
# include <unistd.h>
# include <sys/time.h>
# include <sys/stat.h>
# ifndef CONFIG_TCC_STATIC
# include <dlfcn.h>
# endif
@ -278,6 +279,15 @@ extern long double strtold (const char *__nptr, char **__endptr);
ALSO_TRIPLET(CONFIG_SYSROOT "/usr/" CONFIG_LDDIR) \
":" ALSO_TRIPLET(CONFIG_SYSROOT "/" CONFIG_LDDIR) \
":" ALSO_TRIPLET(CONFIG_SYSROOT "/usr/local/" CONFIG_LDDIR)
# ifdef TCC_TARGET_MACHO
# define CONFIG_OSX_SDK1 \
"/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk"
# define CONFIG_OSX_SDK2 \
"/Applications/Xcode.app/Developer/SDKs/MacOSX.sdk"
# define CONFIG_OSX_SDK_FALLBACK \
ALSO_TRIPLET(CONFIG_OSX_SDK1 "/usr/" CONFIG_LDDIR) \
":" ALSO_TRIPLET(CONFIG_OSX_SDK2 "/usr/" CONFIG_LDDIR)
# endif
# endif
#endif

121
tccmacho.c
View File

@ -837,7 +837,102 @@ static uint32_t macho_swap32(uint32_t x)
}
#define SWAP(x) (swap ? macho_swap32(x) : (x))
ST_FUNC int macho_load_dll(TCCState *s1, int fd, const char *filename, int lev)
ST_FUNC int macho_add_dllref(TCCState* s1, int lev, const char* soname)
{
/* if the dll is already loaded, do not load it */
DLLReference *dllref;
int i;
for(i = 0; i < s1->nb_loaded_dlls; i++) {
dllref = s1->loaded_dlls[i];
if (!strcmp(soname, dllref->name)) {
/* but update level if needed */
if (lev < dllref->level)
dllref->level = lev;
return -1;
}
}
dllref = tcc_mallocz(sizeof(DLLReference) + strlen(soname));
dllref->level = lev;
strcpy(dllref->name, soname);
dynarray_add(&s1->loaded_dlls, &s1->nb_loaded_dlls, dllref);
return 0;
}
#define tbd_parse_movepast(s) \
(pos = (pos = strstr(pos, s)) ? pos + strlen(s) : NULL)
#define tbd_parse_movetoany(cs) (pos = strpbrk(pos, cs))
#define tbd_parse_skipws while (*pos && (*pos==' '||*pos=='\n')) ++pos
#define tbd_parse_tramplequote if(*pos=='\''||*pos=='"') tbd_parse_trample
#define tbd_parse_tramplespace if(*pos==' ') tbd_parse_trample
#define tbd_parse_trample *pos++=0
ST_FUNC const char* macho_tbd_soname(const char* filename) {
char *soname, *data, *pos, *ret;
struct stat sb;
int fd = open(filename,O_RDONLY);
if (fd<0) return filename;
fstat(fd,&sb);
data = load_data(fd, 0, sb.st_size+1);
data[sb.st_size]=0;
pos = data;
if (!tbd_parse_movepast("install-name: ")) return filename;
tbd_parse_skipws;
tbd_parse_tramplequote;
soname = pos;
if (!tbd_parse_movetoany("\n \"'")) return filename;
tbd_parse_trample;
ret = tcc_mallocz(strlen(soname)+1);
strcpy(ret, soname);
// soname = strdup(soname);
tcc_free(data);
return ret;
}
ST_FUNC int macho_load_tbd(TCCState* s1, int fd, const char* filename, int lev)
{
char *soname, *data, *pos;
struct stat sb;
fstat(fd,&sb);
data = load_data(fd, 0, sb.st_size+1);
data[sb.st_size]=0;
pos = data;
if (!tbd_parse_movepast("install-name: ")) return -1;
tbd_parse_skipws;
tbd_parse_tramplequote;
soname = pos;
if (!tbd_parse_movetoany("\n \"'")) return -1;
tbd_parse_trample;
if (macho_add_dllref(s1, lev, soname) != 0) goto the_end;
while(pos) {
char* sym = NULL;
int cont = 1;
if (!tbd_parse_movepast("symbols: ")) break;
if (!tbd_parse_movepast("[")) break;
while (cont) {
tbd_parse_skipws;
tbd_parse_tramplequote;
sym = pos;
if (!tbd_parse_movetoany(",] \"'")) break;
tbd_parse_tramplequote;
tbd_parse_tramplespace;
tbd_parse_skipws;
if (*pos==0||*pos==']') cont=0;
tbd_parse_trample;
set_elf_sym(s1->dynsymtab_section, 0, 0,
ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0, SHN_UNDEF, sym);
}
}
the_end:
tcc_free(data);
return 0;
}
ST_FUNC int macho_load_dylib(TCCState * s1, int fd, const char* filename, int lev)
{
unsigned char buf[sizeof(struct mach_header_64)];
void *buf2;
@ -853,7 +948,6 @@ ST_FUNC int macho_load_dll(TCCState *s1, int fd, const char *filename, int lev)
uint32_t strsize = 0;
uint32_t iextdef = 0;
uint32_t nextdef = 0;
DLLReference *dllref;
again:
if (full_read(fd, buf, sizeof(buf)) != sizeof(buf))
@ -934,20 +1028,8 @@ ST_FUNC int macho_load_dll(TCCState *s1, int fd, const char *filename, int lev)
lc = (struct load_command*) ((char*)lc + lc->cmdsize);
}
/* if the dll is already loaded, do not load it */
for(i = 0; i < s1->nb_loaded_dlls; i++) {
dllref = s1->loaded_dlls[i];
if (!strcmp(soname, dllref->name)) {
/* but update level if needed */
if (lev < dllref->level)
dllref->level = lev;
goto the_end;
}
}
dllref = tcc_mallocz(sizeof(DLLReference) + strlen(soname));
dllref->level = lev;
strcpy(dllref->name, soname);
dynarray_add(&s1->loaded_dlls, &s1->nb_loaded_dlls, dllref);
if (0 != macho_add_dllref(s1, lev, soname))
goto the_end;
if (!nsyms || !nextdef)
tcc_warning("%s doesn't export any symbols?", filename);
@ -972,3 +1054,10 @@ ST_FUNC int macho_load_dll(TCCState *s1, int fd, const char *filename, int lev)
tcc_free(buf2);
return 0;
}
ST_FUNC int macho_load_dll(TCCState * s1, int fd, const char* filename, int lev)
{
return strcmp(tcc_fileextension(filename), ".tbd") == 0
? macho_load_tbd(s1, fd, filename, lev)
: macho_load_dylib(s1, fd, filename, lev);
}