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libtcc: reimplement option -Wl,[-no]-whöle-archive

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- taking advantage of previous commit "incremental -Wl parsing"
This commit is contained in:
grischka 2016-10-01 20:54:45 +02:00
parent 2f1174550e
commit 0d9f88ea67
5 changed files with 119 additions and 113 deletions
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161
libtcc.c
View File

@ -1298,10 +1298,9 @@ LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
{
ElfW(Ehdr) ehdr;
int fd, ret, size;
int filetype = flags & 0x0F;
int ret, filetype;
filetype = flags & 0x0F;
if (filetype == 0) {
/* use a file extension to detect a filetype */
const char *ext = tcc_fileextension(filename);
@ -1320,16 +1319,6 @@ ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
}
}
parse_flags = 0;
#ifdef CONFIG_TCC_ASM
/* if .S file, define __ASSEMBLER__ like gcc does */
if (filetype == AFF_TYPE_ASM
|| filetype == AFF_TYPE_ASMPP) {
tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
parse_flags = PARSE_FLAG_ASM_FILE;
}
#endif
/* open the file */
ret = tcc_open(s1, filename);
if (ret < 0) {
@ -1342,96 +1331,76 @@ ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
tcc_strdup(filename));
if (flags & AFF_PREPROCESS) {
ret = tcc_preprocess(s1);
goto the_end;
}
if (filetype == AFF_TYPE_C) {
/* C file assumed */
ret = tcc_compile(s1);
goto the_end;
}
parse_flags = 0;
#ifdef CONFIG_TCC_ASM
if (filetype == AFF_TYPE_ASMPP) {
/* non preprocessed assembler */
ret = tcc_assemble(s1, 1);
goto the_end;
}
if (filetype == AFF_TYPE_ASM) {
/* preprocessed assembler */
ret = tcc_assemble(s1, 0);
goto the_end;
/* if .S file, define __ASSEMBLER__ like gcc does */
if (filetype == AFF_TYPE_ASM || filetype == AFF_TYPE_ASMPP) {
tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
parse_flags = PARSE_FLAG_ASM_FILE;
}
#endif
fd = file->fd;
/* assume executable format: auto guess file type */
size = read(fd, &ehdr, sizeof(ehdr));
lseek(fd, 0, SEEK_SET);
if (size <= 0) {
tcc_error_noabort("could not read header");
goto the_end;
}
if (flags & AFF_PREPROCESS) {
ret = tcc_preprocess(s1);
} else if (filetype == AFF_TYPE_C) {
ret = tcc_compile(s1);
#ifdef CONFIG_TCC_ASM
} else if (filetype == AFF_TYPE_ASMPP) {
/* non preprocessed assembler */
ret = tcc_assemble(s1, 1);
} else if (filetype == AFF_TYPE_ASM) {
/* preprocessed assembler */
ret = tcc_assemble(s1, 0);
#endif
} else {
ElfW(Ehdr) ehdr;
int fd, obj_type;
if (size == sizeof(ehdr) &&
ehdr.e_ident[0] == ELFMAG0 &&
ehdr.e_ident[1] == ELFMAG1 &&
ehdr.e_ident[2] == ELFMAG2 &&
ehdr.e_ident[3] == ELFMAG3) {
fd = file->fd;
obj_type = tcc_object_type(fd, &ehdr);
lseek(fd, 0, SEEK_SET);
/* do not display line number if error */
file->line_num = 0;
if (ehdr.e_type == ET_REL) {
ret = tcc_load_object_file(s1, fd, 0);
goto the_end;
}
switch (obj_type) {
case AFF_BINTYPE_REL:
ret = tcc_load_object_file(s1, fd, 0);
break;
#ifndef TCC_TARGET_PE
if (ehdr.e_type == ET_DYN) {
case AFF_BINTYPE_DYN:
if (s1->output_type == TCC_OUTPUT_MEMORY) {
ret = 0;
#ifdef TCC_IS_NATIVE
void *h;
h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
if (h)
if (NULL == dlopen(filename, RTLD_GLOBAL | RTLD_LAZY))
ret = -1;
#endif
ret = 0;
} else {
ret = tcc_load_dll(s1, fd, filename,
(flags & AFF_REFERENCED_DLL) != 0);
}
goto the_end;
}
break;
#endif
tcc_error_noabort("unrecognized ELF file");
goto the_end;
}
if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
file->line_num = 0; /* do not display line number if error */
ret = tcc_load_archive(s1, fd);
goto the_end;
}
case AFF_BINTYPE_AR:
ret = tcc_load_archive(s1, fd);
break;
#ifdef TCC_TARGET_COFF
if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
ret = tcc_load_coff(s1, fd);
goto the_end;
}
case AFF_BINTYPE_C67:
ret = tcc_load_coff(s1, fd);
break;
#endif
default:
#ifdef TCC_TARGET_PE
ret = pe_load_file(s1, filename, fd);
ret = pe_load_file(s1, filename, fd);
#else
/* as GNU ld, consider it is an ld script if not recognized */
ret = tcc_load_ldscript(s1);
/* as GNU ld, consider it is an ld script if not recognized */
ret = tcc_load_ldscript(s1);
#endif
if (ret < 0)
tcc_error_noabort("unrecognized file type");
the_end:
if (ret < 0)
tcc_error_noabort("unrecognized file type");
break;
}
}
tcc_close();
return ret;
}
@ -1702,6 +1671,15 @@ static const FlagDef warning_defs[] = {
"implicit-function-declaration" },
};
static int no_flag(const char **pp)
{
const char *p = *pp;
if (*p != 'n' || *++p != 'o' || *++p != '-')
return 0;
*pp = p + 1;
return 1;
}
ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
const char *name, int value)
{
@ -1710,10 +1688,9 @@ ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
const char *r;
r = name;
if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
r += 3;
if (no_flag(&r))
value = !value;
}
for(i = 0, p = flags; i < nb_flags; i++, p++) {
if (!strcmp(r, p->name))
goto found;
@ -1789,6 +1766,7 @@ static int strstart(const char *val, const char **str)
static int link_option(const char *str, const char *val, const char **ptr)
{
const char *p, *q;
int ret;
/* there should be 1 or 2 dashes */
if (*str++ != '-')
@ -1800,6 +1778,13 @@ static int link_option(const char *str, const char *val, const char **ptr)
p = str;
q = val;
ret = 1;
if (q[0] == '?') {
++q;
if (no_flag(&p))
ret = -1;
}
while (*q != '\0' && *q != '=') {
if (*p != *q)
return 0;
@ -1816,7 +1801,7 @@ static int link_option(const char *str, const char *val, const char **ptr)
p++;
}
*ptr = p;
return 1;
return ret;
}
static const char *skip_linker_arg(const char **str)
@ -1842,6 +1827,7 @@ static int tcc_set_linker(TCCState *s, const char *option)
const char *p = NULL;
char *end = NULL;
int ignoring = 0;
int ret;
if (link_option(option, "Bsymbolic", &p)) {
s->symbolic = 1;
@ -1915,6 +1901,8 @@ static int tcc_set_linker(TCCState *s, const char *option)
} else
goto err;
#endif
} else if (ret = link_option(option, "?whole-archive", &p), ret) {
s->alacarte_link = ret < 0;
} else if (p) {
return 0;
} else {
@ -2152,7 +2140,7 @@ PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
tcc_set_lib_path(s, optarg);
break;
case TCC_OPTION_l:
args_parser_add_file(s, optarg, AFF_TYPE_LIB);
args_parser_add_file(s, optarg, AFF_TYPE_LIBWH - s->alacarte_link);
s->nb_libraries++;
break;
case TCC_OPTION_pthread:
@ -2295,8 +2283,6 @@ PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
printf ("%s\n", TCC_VERSION);
exit(0);
break;
case TCC_OPTION_traditional:
break;
case TCC_OPTION_x:
if (*optarg == 'c')
s->filetype = AFF_TYPE_C;
@ -2312,6 +2298,7 @@ PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
if (x > 0)
tcc_define_symbol(s, "__OPTIMIZE__", NULL);
break;
case TCC_OPTION_traditional:
case TCC_OPTION_pedantic:
case TCC_OPTION_pipe:
case TCC_OPTION_s:

6
tcc.c
View File

@ -314,7 +314,8 @@ int main(int argc, char **argv)
/* compile or add each files or library */
for(i = ret = 0; i < s->nb_files && ret == 0; i++) {
struct filespec *f = s->files[i];
if (f->type == AFF_TYPE_LIB) {
if (f->type >= AFF_TYPE_LIB) {
s->alacarte_link = f->type == AFF_TYPE_LIB;
if (tcc_add_library_err(s, f->name) < 0)
ret = 1;
} else {
@ -323,10 +324,11 @@ int main(int argc, char **argv)
s->filetype = f->type;
if (tcc_add_file(s, f->name) < 0)
ret = 1;
s->filetype = AFF_TYPE_NONE;
if (!first_file)
first_file = f->name;
}
s->filetype = AFF_TYPE_NONE;
s->alacarte_link = 1;
}
if (0 == ret) {

20
tcc.h
View File

@ -1143,12 +1143,19 @@ ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
#define AFF_REFERENCED_DLL 0x20 /* load a referenced dll from another dll */
#define AFF_PREPROCESS 0x40 /* preprocess file */
/* combined with: */
#define AFF_TYPE_NONE 0
#define AFF_TYPE_C 1
#define AFF_TYPE_ASM 2
#define AFF_TYPE_ASMPP 3
#define AFF_TYPE_BIN 4
#define AFF_TYPE_LIB 5
#define AFF_TYPE_NONE 0
#define AFF_TYPE_C 1
#define AFF_TYPE_ASM 2
#define AFF_TYPE_ASMPP 3
#define AFF_TYPE_BIN 4
#define AFF_TYPE_LIB 5
#define AFF_TYPE_LIBWH 6
/* values from tcc_object_type(...) */
#define AFF_BINTYPE_REL 1
#define AFF_BINTYPE_DYN 2
#define AFF_BINTYPE_AR 3
#define AFF_BINTYPE_C67 4
ST_FUNC int tcc_add_crt(TCCState *s, const char *filename);
@ -1348,6 +1355,7 @@ ST_FUNC void relocate_section(TCCState *s1, Section *s);
ST_FUNC void relocate_plt(TCCState *s1);
ST_FUNC void tcc_add_linker_symbols(TCCState *s1);
ST_FUNC int tcc_object_type(int fd, ElfW(Ehdr) *h);
ST_FUNC int tcc_load_object_file(TCCState *s1, int fd, unsigned long file_offset);
ST_FUNC int tcc_load_archive(TCCState *s1, int fd);
ST_FUNC void tcc_add_bcheck(TCCState *s1);

43
tccelf.c
View File

@ -2725,6 +2725,25 @@ typedef struct SectionMergeInfo {
uint8_t link_once; /* true if link once section */
} SectionMergeInfo;
ST_FUNC int tcc_object_type(int fd, ElfW(Ehdr) *h)
{
int size = read(fd, h, sizeof *h);
if (size == sizeof *h && 0 == memcmp(h, ELFMAG, 4)) {
if (h->e_type == ET_REL)
return AFF_BINTYPE_REL;
if (h->e_type == ET_DYN)
return AFF_BINTYPE_DYN;
} else if (size >= 8) {
if (0 == memcmp(h, ARMAG, 8))
return AFF_BINTYPE_AR;
#ifdef TCC_TARGET_COFF
if (((struct filehdr*)h)->f_magic == COFF_C67_MAGIC)
return AFF_BINTYPE_C67;
#endif
}
return 0;
}
/* load an object file and merge it with current files */
/* XXX: handle correctly stab (debug) info */
ST_FUNC int tcc_load_object_file(TCCState *s1,
@ -2746,15 +2765,8 @@ ST_FUNC int tcc_load_object_file(TCCState *s1,
stab_index = stabstr_index = 0;
if (read(fd, &ehdr, sizeof(ehdr)) != sizeof(ehdr))
goto fail1;
if (ehdr.e_ident[0] != ELFMAG0 ||
ehdr.e_ident[1] != ELFMAG1 ||
ehdr.e_ident[2] != ELFMAG2 ||
ehdr.e_ident[3] != ELFMAG3)
goto fail1;
/* test if object file */
if (ehdr.e_type != ET_REL)
lseek(fd, file_offset, SEEK_SET);
if (tcc_object_type(fd, &ehdr) != AFF_BINTYPE_REL)
goto fail1;
/* test CPU specific stuff */
if (ehdr.e_ident[5] != ELFDATA2LSB ||
@ -3052,7 +3064,6 @@ static int tcc_load_alacarte(TCCState *s1, int fd, int size)
if(sym->st_shndx == SHN_UNDEF) {
off = get_be32(ar_index + i * 4) + sizeof(ArchiveHeader);
++bound;
lseek(fd, off, SEEK_SET);
if(tcc_load_object_file(s1, fd, off) < 0) {
fail:
ret = -1;
@ -3105,14 +3116,12 @@ ST_FUNC int tcc_load_archive(TCCState *s1, int fd)
/* coff symbol table : we handle it */
if(s1->alacarte_link)
return tcc_load_alacarte(s1, fd, size);
} else if (!strcmp(ar_name, "//") ||
!strcmp(ar_name, "__.SYMDEF") ||
!strcmp(ar_name, "__.SYMDEF/") ||
!strcmp(ar_name, "ARFILENAMES/")) {
/* skip symbol table or archive names */
} else {
if (tcc_load_object_file(s1, fd, file_offset) < 0)
return -1;
ElfW(Ehdr) ehdr;
if (tcc_object_type(fd, &ehdr) == AFF_BINTYPE_REL) {
if (tcc_load_object_file(s1, fd, file_offset) < 0)
return -1;
}
}
lseek(fd, file_offset + size, SEEK_SET);
}

2
tccpe.c
View File

@ -1664,7 +1664,7 @@ ST_FUNC int pe_load_file(struct TCCState *s1, const char *filename, int fd)
ret = pe_load_def(s1, fd);
else if (pe_load_res(s1, fd) == 0)
ret = 0;
else if (read_mem(fd, 0, buf, sizeof buf) && 0 == strncmp(buf, "MZ", 2))
else if (read_mem(fd, 0, buf, 4) && 0 == memcmp(buf, "MZ\220", 4))
ret = pe_load_dll(s1, tcc_basename(filename), fd);
return ret;
}