Bool
aout_is_exec(Environ *e, uByte *load, uInt loadlen)
{
struct exec *ex = (struct exec*)load;
int m;
DPRINTF(("aout_is_exec: midmag=%#x badmagic=%d mid=%#x\n",
ex->a_midmag, N_BADMAG(*ex), N_GETMID(*ex)));
if (N_BADMAG(*ex))
return FALSE;
m = N_GETMID(*ex);
if (m == AOUT_MAGIC_0)
return TRUE;
#ifdef AOUT_MAGIC_1
if (m == AOUT_MAGIC_1)
return TRUE;
#endif
#ifdef AOUT_MAGIC_2
if (m == AOUT_MAGIC_2)
return TRUE;
#endif
#ifdef AOUT_MAGIC_3
if (m == AOUT_MAGIC_3)
return TRUE;
#endif
return FALSE;
}
int
CheckAOutFile(int fd)
{
#ifdef NOAOUT
return(-1);
#else
struct exec ex, ex_swap;
int mid = -1;
if (read(fd, (char *)&ex, sizeof(ex)) != sizeof(ex))
return(-1);
(void)lseek(fd, (off_t) 0, SEEK_SET);
if (read(fd, (char *)&ex_swap, sizeof(ex_swap)) != sizeof(ex_swap))
return(-1);
(void)lseek(fd, (off_t) 0, SEEK_SET);
mid = getMID(mid, N_GETMID (ex));
if (mid == -1) {
mid = getMID(mid, N_GETMID (ex_swap));
}
if (mid != -1) {
return(0);
} else {
return(-1);
}
#endif /* NOAOUT */
}
static int
is_exos_aout(int fd)
{
struct exec hdr;
u_int dynamic;
if (lseek(fd, 0, SEEK_SET) == -1 ||
read(fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
lseek(fd, sizeof(hdr) + hdr.a_text, SEEK_SET) == -1 ||
read(fd, &dynamic, sizeof(dynamic)) != sizeof(dynamic))
return 0;
if (N_GETMAGIC(hdr) != OMAGIC ||
N_GETMID(hdr) != MID_I386 ||
N_GETFLAG(hdr) != 0)
return 0;
return 1;
}
/*
* Open 'filename', read in program and and return 0 if ok 1 on error.
* Fill in marks
*/
int
loadfile(const char *fname, u_long *marks, int flags)
{
union {
#ifdef BOOT_ECOFF
struct ecoff_exechdr coff;
#endif
#ifdef BOOT_ELF
Elf_Ehdr elf;
#endif
#ifdef BOOT_AOUT
struct exec aout;
#endif
} hdr;
ssize_t nr;
int fd, rval;
/* Open the file. */
if ((fd = open(fname, 0)) < 0) {
WARN(("open %s", fname ? fname : "<default>"));
return -1;
}
/* Read the exec header. */
if ((nr = read(fd, &hdr, sizeof(hdr))) != sizeof(hdr)) {
WARN(("read header"));
goto err;
}
#ifdef BOOT_ECOFF
if (!ECOFF_BADMAG(&hdr.coff)) {
rval = coff_exec(fd, &hdr.coff, marks, flags);
} else
#endif
#ifdef BOOT_ELF
if (memcmp(hdr.elf.e_ident, ELFMAG, SELFMAG) == 0 &&
hdr.elf.e_ident[EI_CLASS] == ELFCLASS) {
#ifdef BOOT_ZBOOT
rval = zboot_exec(fd, marks, flags);
#else
rval = elf_exec(fd, &hdr.elf, marks, flags);
#endif
} else
#endif
#ifdef BOOT_AOUT
if (OKMAGIC(N_GETMAGIC(hdr.aout))
#ifndef NO_MID_CHECK
&& N_GETMID(hdr.aout) == MID_MACHINE
#endif
) {
rval = aout_exec(fd, &hdr.aout, marks, flags);
} else
#endif
{
rval = 1;
errno = EFTYPE;
WARN(("%s", fname ? fname : "<default>"));
}
if (rval == 0) {
PROGRESS(("=0x%lx\n", marks[MARK_END] - marks[MARK_START]));
return fd;
}
err:
(void)close(fd);
return -1;
}
/*
* read_exec
* Read the exec structure; ignore any files that don't look
* exactly right. Return MID.
* return -1 for files that don't look right.
* XXX it's hard to be sure when to ignore files, and when to error
* out.
*/
int
read_exec(FILE *rfp, FILE *wfp, long *symcnt, long *tsymlen)
{
union {
struct exec exec;
Elf32_Ehdr elf32;
Elf64_Ehdr elf64;
} eh;
struct nlist nl;
off_t r_off, w_off;
char *strtab = NULL;
long strsize, nsyms;
int i;
/* Get current offsets for original and tmp files. */
r_off = ftello(rfp);
w_off = ftello(wfp);
/* Read in exec structure. */
if (fread(&eh, sizeof(eh), 1, rfp) != 1)
err(1, "fread: %s", archive);
if (!elf32_chk_header(&eh.elf32)) {
Elf32_Sym sbuf;
char *shstr;
Elf32_Shdr *shdr;
size_t stabsize;
elf32_fix_header(&eh.elf32);
if (eh.elf32.e_ehsize < sizeof eh.elf32) {
warnx("%s: ELF header is too short", archive);
goto bad;
}
if (!(shdr = elf32_load_shdrs(archive, rfp, r_off, &eh.elf32)))
goto bad;
elf32_fix_shdrs(&eh.elf32, shdr);
if (!(shstr = elf32_shstrload(archive, rfp, r_off, &eh.elf32,
shdr))) {
free(shdr);
goto bad;
}
if (!(strtab = elf32_strload(archive, rfp, r_off, &eh.elf32,
shdr, shstr, ELF_STRTAB, &stabsize))) {
free(shstr);
free(shdr);
goto bad;
}
/* find the symtab section */
for (i = 0; i < eh.elf32.e_shnum; i++)
if (!strcmp(shstr + shdr[i].sh_name, ELF_SYMTAB)) {
nsyms = shdr[i].sh_size / sizeof(Elf32_Sym);
break;
}
if (i == eh.elf32.e_shnum) {
free(shstr);
free(shdr);
goto bad;
}
if (fseeko(rfp, r_off + shdr[i].sh_offset, SEEK_SET))
err(1, "fseeko: %s", archive);
for (i = 0; i < nsyms; i++) {
if (fread(&sbuf, sizeof(sbuf), 1, rfp) != 1)
err(1, "fread: %s", archive);
elf32_fix_sym(&eh.elf32, &sbuf);
if (!sbuf.st_name || sbuf.st_name > stabsize)
continue;
if (elf32_2nlist(&sbuf, &eh.elf32, shdr, shstr, &nl))
continue;
addsym(&nl, strtab, r_off - r_fuzz -
sizeof(struct ar_hdr), symcnt, tsymlen, archive);
}
free(strtab);
free(shstr);
free(shdr);
(void)fseeko(rfp, r_off, SEEK_SET);
return MID_ELFFL | eh.elf32.e_machine;
} else if (!elf64_chk_header(&eh.elf64)) {
Elf64_Sym sbuf;
char *shstr;
Elf64_Shdr *shdr;
size_t stabsize;
elf64_fix_header(&eh.elf64);
if (eh.elf64.e_ehsize < sizeof eh.elf64) {
warnx("%s: ELF header is too short", archive);
goto bad;
}
if (!(shdr = elf64_load_shdrs(archive, rfp, r_off, &eh.elf64)))
goto bad;
elf64_fix_shdrs(&eh.elf64, shdr);
if (!(shstr = elf64_shstrload(archive, rfp, r_off, &eh.elf64,
shdr))) {
free(shdr);
goto bad;
}
if (!(strtab = elf64_strload(archive, rfp, r_off, &eh.elf64,
shdr, shstr, ELF_STRTAB, &stabsize))) {
free(shstr);
free(shdr);
goto bad;
}
/* find the symtab section */
for (i = 0; i < eh.elf64.e_shnum; i++)
if (!strcmp(shstr + shdr[i].sh_name, ELF_SYMTAB)) {
nsyms = shdr[i].sh_size / sizeof(Elf64_Sym);
break;
}
if (i == eh.elf64.e_shnum) {
free(shstr);
free(shdr);
goto bad;
}
if (fseeko(rfp, r_off + shdr[i].sh_offset, SEEK_SET))
err(1, "fseeko: %s", archive);
for (i = 0; i < nsyms; i++) {
if (fread(&sbuf, sizeof(sbuf), 1, rfp) != 1)
err(1, "fread: %s", archive);
elf64_fix_sym(&eh.elf64, &sbuf);
if (!sbuf.st_name || sbuf.st_name > stabsize)
continue;
if (elf64_2nlist(&sbuf, &eh.elf64, shdr, shstr, &nl))
continue;
addsym(&nl, strtab, r_off - r_fuzz -
sizeof(struct ar_hdr), symcnt, tsymlen, archive);
}
free(strtab);
free(shstr);
free(shdr);
(void)fseeko(rfp, r_off, SEEK_SET);
return MID_ELFFL | eh.elf64.e_machine;
} else if (BAD_OBJECT(eh.exec) || eh.exec.a_syms == 0)
goto bad;
fix_header_order(&eh.exec);
/* Seek to string table. */
if (fseeko(rfp, N_STROFF(eh.exec) + r_off, SEEK_SET) == -1) {
if (errno == EINVAL)
goto bad;
else
err(1, "lseek: %s", archive);
}
/* Read in size of the string table. */
if (fread((char *)&strsize, sizeof(strsize), 1, rfp) != 1)
err(1, "fread: %s", archive);
strsize = fix_32_order(strsize, N_GETMID(eh.exec));
/* Read in the string table. */
strsize -= sizeof(strsize);
strtab = malloc(strsize);
if (!strtab)
err(1, "malloc: %s", archive);
if (fread(strtab, strsize, 1, rfp) != 1)
err(1, "fread: %s", archive);
/* Seek to symbol table. */
if (fseek(rfp, N_SYMOFF(eh.exec) + r_off, SEEK_SET) == (off_t)-1)
err(1, "fseeko: %s", archive);
/* For each symbol read the nlist entry and save it as necessary. */
nsyms = eh.exec.a_syms / sizeof(struct nlist);
while (nsyms--) {
if (!fread((char *)&nl, sizeof(struct nlist), 1, rfp)) {
if (feof(rfp))
badfmt();
err(1, "fread: %s", archive);
}
fix_nlist_order(&nl, N_GETMID(eh.exec));
addsym(&nl, strtab - sizeof(long), r_off - r_fuzz -
sizeof(struct ar_hdr), symcnt, tsymlen, archive);
}
bad:
free(strtab);
(void)fseeko(rfp, r_off, SEEK_SET);
return N_GETMID(eh.exec);
}
int
GetAOutFileInfo(struct dllist *dl)
{
#ifdef NOAOUT
return(-1);
#else
struct exec ex, ex_swap;
u_int32_t mid = -1;
u_int32_t magic, clbytes, clofset;
if (read(dl->ldfd, (char *)&ex, sizeof(ex)) != sizeof(ex))
return(-1);
(void)lseek(dl->ldfd, (off_t) 0, SEEK_SET);
if (read(dl->ldfd, (char *)&ex_swap,
sizeof(ex_swap)) != sizeof(ex_swap))
return(-1);
mopFileSwapX((u_char *)&ex_swap, 0, 4);
mid = getMID(mid, N_GETMID (ex));
if (mid == (uint32_t)-1) {
mid = getMID(mid, N_GETMID (ex_swap));
if (mid != (uint32_t)-1) {
mopFileSwapX((u_char *)&ex, 0, 4);
}
}
if (mid == (uint32_t)-1) {
return(-1);
}
if (N_BADMAG (ex)) {
return(-1);
}
switch (mid) {
case MID_I386:
#ifdef MID_NS32532
case MID_NS32532:
#endif
#ifdef MID_PMAX
case MID_PMAX:
#endif
#ifdef MID_VAX
case MID_VAX:
#endif
#ifdef MID_ALPHA
case MID_ALPHA:
#endif
#ifdef MID_ARM6
case MID_ARM6:
#endif
ex.a_text = mopFileGetLX((u_char *)&ex_swap, 4, 4);
ex.a_data = mopFileGetLX((u_char *)&ex_swap, 8, 4);
ex.a_bss = mopFileGetLX((u_char *)&ex_swap, 12, 4);
ex.a_syms = mopFileGetLX((u_char *)&ex_swap, 16, 4);
ex.a_entry = mopFileGetLX((u_char *)&ex_swap, 20, 4);
ex.a_trsize= mopFileGetLX((u_char *)&ex_swap, 24, 4);
ex.a_drsize= mopFileGetLX((u_char *)&ex_swap, 28, 4);
break;
#ifdef MID_M68K
case MID_M68K:
#endif
#ifdef MID_M68K4K
case MID_M68K4K:
#endif
case MID_SPARC:
#ifdef MID_MIPS
case MID_MIPS:
#endif
ex.a_text = mopFileGetBX((u_char *)&ex_swap, 4, 4);
ex.a_data = mopFileGetBX((u_char *)&ex_swap, 8, 4);
ex.a_bss = mopFileGetBX((u_char *)&ex_swap, 12, 4);
ex.a_syms = mopFileGetBX((u_char *)&ex_swap, 16, 4);
ex.a_entry = mopFileGetBX((u_char *)&ex_swap, 20, 4);
ex.a_trsize= mopFileGetBX((u_char *)&ex_swap, 24, 4);
ex.a_drsize= mopFileGetBX((u_char *)&ex_swap, 28, 4);
break;
default:
break;
}
printf("a.out image (");
switch (N_GETMID (ex)) {
case MID_I386:
printf("i386");
break;
#ifdef MID_M68K
case MID_M68K:
printf("m68k");
break;
#endif
#ifdef MID_M68K4K
case MID_M68K4K:
printf("m68k 4k");
break;
#endif
#ifdef MID_NS32532
case MID_NS32532:
printf("pc532");
break;
#endif
case MID_SPARC:
printf("sparc");
break;
#ifdef MID_PMAX
case MID_PMAX:
printf("pmax");
break;
#endif
#ifdef MID_VAX
case MID_VAX:
printf("vax");
break;
#endif
#ifdef MID_ALPHA
case MID_ALPHA:
printf("alpha");
break;
#endif
#ifdef MID_MIPS
case MID_MIPS:
printf("mips");
break;
#endif
#ifdef MID_ARM6
case MID_ARM6:
printf("arm32");
break;
#endif
default:
break;
}
printf(") Magic: ");
switch (N_GETMAGIC (ex)) {
case OMAGIC:
printf("OMAGIC");
break;
case NMAGIC:
printf("NMAGIC");
break;
case ZMAGIC:
printf("ZMAGIC");
break;
case QMAGIC:
printf("QMAGIC");
break;
default:
printf("Unknown %ld", (long) N_GETMAGIC (ex));
}
printf("\n");
printf("Size of text: %08lx\n", (long)ex.a_text);
printf("Size of data: %08lx\n", (long)ex.a_data);
printf("Size of bss: %08lx\n", (long)ex.a_bss);
printf("Size of symbol tab: %08lx\n", (long)ex.a_syms);
printf("Transfer Address: %08lx\n", (long)ex.a_entry);
printf("Size of reloc text: %08lx\n", (long)ex.a_trsize);
printf("Size of reloc data: %08lx\n", (long)ex.a_drsize);
magic = N_GETMAGIC (ex);
clbytes = getCLBYTES(mid);
clofset = clbytes - 1;
dl->image_type = IMAGE_TYPE_AOUT;
dl->loadaddr = 0;
dl->xferaddr = ex.a_entry;
dl->a_text = ex.a_text;
if (magic == ZMAGIC || magic == NMAGIC) {
dl->a_text_fill = clbytes - (ex.a_text & clofset);
if (dl->a_text_fill == clbytes)
dl->a_text_fill = 0;
} else
dl->a_text_fill = 0;
dl->a_data = ex.a_data;
if (magic == ZMAGIC || magic == NMAGIC) {
dl->a_data_fill = clbytes - (ex.a_data & clofset);
if (dl->a_data_fill == clbytes)
dl->a_data_fill = 0;
} else
dl->a_data_fill = 0;
dl->a_bss = ex.a_bss;
if (magic == ZMAGIC || magic == NMAGIC) {
dl->a_bss_fill = clbytes - (ex.a_bss & clofset);
if (dl->a_bss_fill == clbytes)
dl->a_bss_fill = 0;
} else {
dl->a_bss_fill = clbytes -
((ex.a_text+ex.a_data+ex.a_bss) & clofset);
if (dl->a_bss_fill == clbytes)
dl->a_bss_fill = 0;
}
dl->a_mid = mid;
return(0);
#endif /* NOAOUT */
}
/*
* rexec
* Read the exec structure; ignore any files that don't look
* exactly right. Return MID.
* return -1 for files that don't look right.
* XXX it's hard to be sure when to ignore files, and when to error
* out.
*/
static int
rexec(int rfd, int wfd)
{
RLIB *rp;
long nsyms;
int nr, symlen;
char *strtab = 0;
char *sym;
struct exec ebuf;
struct nlist nl;
off_t r_off, w_off;
long strsize;
int result = -1;
/* Get current offsets for original and tmp files. */
r_off = lseek(rfd, (off_t)0, SEEK_CUR);
w_off = lseek(wfd, (off_t)0, SEEK_CUR);
/* Read in exec structure. */
nr = read(rfd, (char *)&ebuf, sizeof(struct exec));
if (nr != sizeof(struct exec))
goto bad;
/* Check magic number and symbol count. */
if (BAD_OBJECT(ebuf) || ebuf.a_syms == 0)
goto bad;
fix_header_order(&ebuf);
/* Seek to string table. */
if (lseek(rfd, N_STROFF(ebuf) + r_off, SEEK_SET) == (off_t)-1) {
if (errno == EINVAL)
goto bad;
else
error(archive);
}
/* Read in size of the string table. */
nr = read(rfd, (char *)&strsize, sizeof(strsize));
if (nr != sizeof(strsize))
goto bad;
strsize = fix_32_order(strsize, N_GETMID(ebuf));
/* Read in the string table. */
strsize -= sizeof(strsize);
strtab = (char *)emalloc(strsize);
nr = read(rfd, strtab, strsize);
if (nr != strsize)
goto bad;
/* Seek to symbol table. */
if (fseek(fp, N_SYMOFF(ebuf) + r_off, SEEK_SET) == (off_t)-1)
goto bad;
result = N_GETMID(ebuf);
/* For each symbol read the nlist entry and save it as necessary. */
nsyms = ebuf.a_syms / sizeof(struct nlist);
while (nsyms--) {
if (!fread((char *)&nl, sizeof(struct nlist), 1, fp)) {
if (feof(fp))
badfmt();
error(archive);
}
fix_nlist_order(&nl, N_GETMID(ebuf));
/* Ignore if no name or local. */
if (!nl.n_un.n_strx || !(nl.n_type & N_EXT))
continue;
/*
* If the symbol is an undefined external and the n_value
* field is non-zero, keep it.
*/
if ((nl.n_type & N_TYPE) == N_UNDF && !nl.n_value)
continue;
/* First four bytes are the table size. */
sym = strtab + nl.n_un.n_strx - sizeof(long);
symlen = strlen(sym) + 1;
rp = (RLIB *)emalloc(sizeof(RLIB));
rp->sym = (char *)emalloc(symlen);
bcopy(sym, rp->sym, symlen);
rp->symlen = symlen;
rp->pos = w_off;
/* Build in forward order for "ar -m" command. */
*pnext = rp;
pnext = &rp->next;
++symcnt;
tsymlen += symlen;
}
bad: if (nr < 0)
error(archive);
free(strtab);
(void)lseek(rfd, (off_t)r_off, SEEK_SET);
return result;
}
void
run_header(struct exec *exhdr, int extended_info)
{
char *id = NULL;
assert(NULL != exhdr);
/* print raw values */
printf(
"\ta_midmag 0x%08x (mid %d, magic 0%o, flag 0x%x)\n"
"\ta_text 0x%08x\n"
"\ta_data 0x%08x\n"
"\ta_bss 0x%08x\n"
"\ta_syms 0x%08x\n"
"\ta_entry 0x%08x\n"
"\ta_trsize 0x%08x\n"
"\ta_drsize 0x%08x\n",
exhdr->a_midmag,
N_GETMID(*exhdr), N_GETMAGIC(*exhdr), N_GETFLAG(*exhdr),
exhdr->a_text,
exhdr->a_data,
exhdr->a_bss,
exhdr->a_syms,
exhdr->a_entry,
exhdr->a_trsize,
exhdr->a_drsize
);
printf(
"magic number %04o: %s\n", N_GETMAGIC(*exhdr),
N_GETMAGIC(*exhdr) == OMAGIC ? "old impure format" :
N_GETMAGIC(*exhdr) == NMAGIC ? "read-only text" :
N_GETMAGIC(*exhdr) == ZMAGIC ? "demand load format" :
N_GETMAGIC(*exhdr) == QMAGIC ? "deprecated format" :
"totally funky"
);
switch (N_GETMID(*exhdr)) {
case MID_ZERO: id = "unknown - implementation dependent"; break;
case MID_SUN010: id = "sun 68010/68020 binary"; break;
case MID_SUN020: id = "sun 68020-only binary"; break;
case MID_PC386: id = "386 PC binary. (so quoth BFD)"; break;
case MID_HP200: id = "hp200 (68010) BSD binary"; break;
case MID_I386: id = "i386 BSD binary"; break;
case MID_M68K: id = "m68k BSD binary with 8K page sizes"; break;
case MID_M68K4K: id = "m68k BSD binary with 4K page sizes"; break;
case MID_NS32532: id = "ns32532"; break;
case MID_SPARC: id = "sparc"; break;
case MID_PMAX: id = "pmax"; break;
case MID_VAX: id = "vax"; break;
case MID_ALPHA: id = "Alpha BSD binary"; break;
case MID_MIPS: id = "big-endian MIPS"; break;
case MID_ARM6: id = "ARM6"; break;
case MID_HP300: id = "hp300 (68020+68881) BSD binary"; break;
case MID_HPUX: id = "hp200/300 HP-UX binary"; break;
case MID_HPUX800: id = "hp800 HP-UX binary"; break;
default:
id = "don't know"; break;
}
printf("type %d, %s\n", N_GETMID(*exhdr), id);
/* this left shift seems a bit bogus */
switch((N_GETFLAG(*exhdr) & EX_DPMASK)>>4) {
case 0:
id = "traditional executable or object file"; break;
case 1:
id = "object file contains PIC code"; break;
case 2:
id = "dynamic executable"; break;
case 3:
id = "position independent executable image"; break;
default:
id = NULL;
}
if (NULL != id)
printf("flags: 0x%x, %s\n", N_GETFLAG(*exhdr), id);
else
printf("flags: 0x%x\n", N_GETFLAG(*exhdr));
if (extended_info) {
unsigned long txt_addr;
unsigned long dat_addr;
unsigned long bss_addr;
/* N_TXTADDR and N_DATADDR macros DON'T WORK */
if (N_GETMAGIC(*exhdr) == ZMAGIC) {
txt_addr = __LDPGSZ;
dat_addr = ((txt_addr + exhdr->a_text + __LDPGSZ - 1) & ~(__LDPGSZ - 1));
} else if (N_GETMAGIC(*exhdr) == OMAGIC) {
txt_addr = 0;
dat_addr = txt_addr + exhdr->a_text;
} else {
txt_addr = 0xdeadbeef;
dat_addr = 0xcafebabe;
}
bss_addr = dat_addr + exhdr->a_data;
printf(" text segment size = 0x%lx, text segment file offset = %ld\n", exhdr->a_text, N_TXTOFF(*exhdr));
printf(" data segment size = 0x%lx, data segment file offset = %ld\n", exhdr->a_data, N_DATOFF(*exhdr));
printf(" bss segment size = 0x%lx\n", exhdr->a_bss);
printf(" text segment relocation size = 0x%lx, file offset = %ld, %d text relocations\n",
exhdr->a_trsize, N_TRELOFF(*exhdr), exhdr->a_trsize/sizeof(struct relocation_info));
printf(" data segment relocation size = 0x%lx, file offset = %ld, %d data relocations\n",
exhdr->a_drsize, N_DRELOFF(*exhdr), exhdr->a_drsize/sizeof(struct relocation_info));
printf(" symbol table size = 0x%lx, symbol table file offset = %ld (%d symbols)\n",
exhdr->a_syms, N_SYMOFF(*exhdr), exhdr->a_syms/sizeof(struct nlist));
printf(" string table file offset = 0x%lx (%d)\n", N_STROFF(*exhdr), N_STROFF(*exhdr));
printf(" entry point = 0x%lx\n", exhdr->a_entry);
printf(" text address = 0x%lx\n\tdata address = 0x%lx\n"
"\tbss address = 0x%lx\n",
txt_addr, dat_addr, bss_addr
/* N_TXTADDR(*exhdr), N_DATADDR(*exhdr), N_BSSADDR(*exhdr) */
);
}
}
int main (int argc, char *argv[]) {
register struct nlist *s;
register caddr_t strtab;
register off_t stroff, symoff;
register u_long symsize;
register int cc;
size_t strsize;
struct nlist nbuf[1024];
struct exec exec;
struct stat st;
int fd;
int pageOffset;
if ((fd = open (argv[1], O_RDONLY)) < 0) {
fprintf (stderr, "could not open %s\n", argv[1]);
return -1;
}
if (lseek(fd, (off_t)0, SEEK_SET) == -1 ||
read(fd, &exec, sizeof(exec)) != sizeof(exec) ||
fstat(fd, &st) < 0) {
fprintf (stderr, "Invalid binary file\n");
return -1;
}
if (N_BADMAG (exec) || N_GETMID (exec) != MID_I386) {
fprintf (stderr, "invalid executable file N_BADMAG(exec) %d N_GETMID (exec) %d MID_I386 %d\n", N_BADMAG(exec), N_GETMID(exec), MID_I386);
exit (1);
}
if (N_GETFLAG (exec) & EX_DYNAMIC) {
fprintf (stderr, "are you giving me a dynamically linked executable??\n");
return -1;
}
symoff = N_SYMOFF(exec);
symsize = exec.a_syms;
stroff = symoff + symsize;
#ifndef __linux__
/* Check for files too large to mmap. */
if (st.st_size - stroff > SIZE_T_MAX) {
fprintf (stderr, "file too large\n");
return -1;
}
#endif
/*
* Map string table into our address space. This gives us
* an easy way to randomly access all the strings, without
* making the memory allocation permanent as with malloc/free
* (i.e., munmap will return it to the system).
*/
strsize = st.st_size - stroff;
pageOffset = stroff % 4096;
stroff -= pageOffset;
strsize += pageOffset;
strtab = mmap(NULL, (size_t)strsize, PROT_READ, MAP_SHARED, fd, stroff);
if (strtab == (char *)-1) {
warn ("could not mmap string table");
return -1;
}
strtab += pageOffset;
strsize -= pageOffset;
if (lseek(fd, symoff, SEEK_SET) == -1) {
fprintf (stderr, "could not lseek to symbol table\n");
return -1;
}
while (symsize > 0) {
int i;
cc = my_min(symsize, sizeof(nbuf));
if (read(fd, nbuf, cc) != cc)
break;
symsize -= cc;
for (s = nbuf; cc > 0; ++s, cc -= sizeof(*s)) {
register int soff = s->n_un.n_strx;
if (soff == 0 || (s->n_type & N_STAB) != 0)
continue;
for (i = 0; exclude[i]; i++) {
if (!strcmp (&strtab[soff], exclude[i]))
goto skip;
}
/* hack to avoid symbol with name equal to tmp filename used
to build us */
if (strchr (&strtab[soff], '.') || strchr (&strtab[soff], '/'))
goto skip;
if (s->n_type & N_EXT) {
printf ("\t.globl\t%s\n\t.set\t%s,0x%lx\n\t.weak\t%s\n\n",
&strtab[soff], &strtab[soff], s->n_value, &strtab[soff]);
}
skip:
;
}
}
munmap(strtab, strsize);
return 0;
}
static int
exec_exos_aout(int fd, const char *path, char *const argv[],
char *const envp[], struct Env *e, u_int flags)
{
u_int envid = e->env_id;
struct exec hdr;
u_int dynamic;
int r;
struct _exos_exec_args eea;
if (lseek(fd, 0, SEEK_SET) == -1 ||
read(fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
lseek(fd, sizeof(hdr) + hdr.a_text, SEEK_SET) == -1 ||
read(fd, &dynamic, sizeof(dynamic)) != sizeof(dynamic))
return 0;
if (N_GETMAGIC(hdr) != OMAGIC ||
N_GETMID(hdr) != MID_I386 ||
N_GETFLAG(hdr) != 0)
return 0;
if (!(flags & _EXEC_USE_FD)) {
close(fd);
fd = -1;
} else if (lseek(fd, 0, SEEK_SET) == -1)
return 0;
if (dynamic < SHARED_LIBRARY_START) dynamic = 0;
if (dynamic == 0 && (flags & _EXEC_SHLIB_ONLY)) {
r = -EINVAL;
goto err;
}
/* if static, then read in entire program... */
if (!dynamic) {
u_int start_text_addr;
if (flags & _EXEC_USE_FD)
start_text_addr = __load_prog_fd(fd, 1, envid);
else
start_text_addr = __load_prog(path, argv[0], 1, envid);
if (!start_text_addr) {
r = -ENOEXEC;
goto err;
}
/* set start address */
e->env_tf.tf_eip = start_text_addr;
}
/* if dynamic, then make sure shared library is available */
else if (dynamic) {
struct stat sb;
/* If flag so indicates, then require RO copy and use in mem version */
if (!(flags & _EXEC_SHLIB_ONLY)) {
/* if the shared library is not already in memory, or if it's old */
/* then we need to (re)read it in */
if (stat(PATH_LIBEXOS, &sb)) {
r = -errno;
kprintf("error stat'ing sl: %d\n", errno);
goto err;
}
/* if we don't have a RO copy or it's out of date... */
if (!isvamapped(SHARED_LIBRARY_START_RODATA) ||
memcmp(&sl_data->mod_time, &sb.st_mtimespec,
sizeof(sb.st_mtimespec))) {
int slfd;
/* if it's out of date, then unmap it */
if (isvamapped(SHARED_LIBRARY_START_RODATA))
munmap((void*)SHARED_LIBRARY_START_RODATA,
(sl_data->text_pages + sl_data->data_pages) * NBPG);
slfd = open (PATH_LIBEXOS, O_RDONLY);
if (slfd < 0) {
r = -errno;
kprintf("could not open shared library " PATH_LIBEXOS "\n");
goto err;
}
if ((r = __load_sl_image (slfd)) < 0) {
kprintf("could not load library\n");
close(slfd);
goto err;
}
*((struct timespec*)&sl_data->mod_time) = sb.st_mtimespec;
assert(sys_self_mod_pte_range(0, PG_RO, PG_W,
SHARED_LIBRARY_START_RODATA, 1) == 0);
close (slfd);
}
} else {
if (!isvamapped(SHARED_LIBRARY_START_RODATA)) {
r = -EINVAL;
goto err;
}
}
/* share the text region read only/exec into child */
if (__vm_share_region(SHARED_LIBRARY_START_RODATA,
sl_data->text_pages * NBPG, 0, 0,
envid, SHARED_LIBRARY_START)) {
kprintf ("__vm_share_region failed for text region\n");
r = -ENOEXEC;
goto err;
}
/* share the read only data region into child cow */
if (__vm_share_region(SHARED_LIBRARY_START_RODATA +
sl_data->text_pages * NBPG,
sl_data->data_pages * NBPG, 0, 0, envid,
SHARED_LIBRARY_START + sl_data->text_pages * NBPG)) {
kprintf ("__vm_share_region failed for cow data region\n");
r = -ENOEXEC;
goto err;
}
if (sys_mod_pte_range(0, PG_COW, PG_RO | PG_SHARED, SHARED_LIBRARY_START +
sl_data->text_pages * NBPG, sl_data->data_pages, 0,
envid) < 0) {
kprintf ("sys_mod_pte_range failed for cow data region\n");
r = -ENOEXEC;
goto err;
}
/* share the RO copy of the shared library */
if (__vm_share_region(SHARED_LIBRARY_START_RODATA,
(sl_data->text_pages + sl_data->data_pages) * NBPG,
0, 0, envid, SHARED_LIBRARY_START_RODATA)) {
kprintf ("__vm_share_region failed for read only text/data region\n");
r = -ENOEXEC;
goto err;
}
/* demand alloc bss for sl or no? */
if (getenv("NO_BSS_DEMAND_ALLOC")) {
/* zero the bss */
if (__zero_segment (envid, SHARED_LIBRARY_START +
(sl_data->text_pages + sl_data->data_pages) *
NBPG, sl_data->bss_pages * NBPG) < 0) {
kprintf("could not create bss segment\n");
r = -ENOEXEC;
goto err;
}
} /* otherwise the fault handler will deal with it */
/* set start address */
e->env_tf.tf_eip = SHARED_LIBRARY_START + sizeof(struct exec);
}
/* take care of args, etc */
if (flags & _EXEC_USE_FD)
eea.eea_prog_fd = fd;
else
eea.eea_prog_fd = -1;
if ((r = setup_new_stack(argv, envp, envid, &e->env_tf.tf_esp, &eea)) < 0)
goto err;
return 1;
err:
return r;
}
/*
* show_file()
* show symbols from the object file pointed to by fp. The current
* file pointer for fp is expected to be at the beginning of an object
* file header.
*/
int
show_file(int count, int warn_fmt, const char *name, FILE *fp, off_t foff, union hdr *head)
{
u_long text, data, bss, total;
struct nlist *np, *names, **snames;
char *stab;
int i, aout, nnames;
size_t stabsize;
off_t staboff;
aout = 0;
if (!elf32_chk_header(&head->elf32)) {
struct elf_symtab es;
es.name = name;
es.ehdr = &head->elf32;
if (head->elf32.e_ehsize < sizeof head->elf32) {
warnx("%s: ELF header is too short", name);
return 1;
}
if (!(es.shdr = elf32_load_shdrs(name, fp, foff, es.ehdr)))
return (1);
elf32_fix_shdrs(es.ehdr, es.shdr);
es.shstr = NULL;
if (issize)
i = elf32_size(es.ehdr, es.shdr, &text, &data, &bss);
else {
nrawnames = 0;
names = NULL;
i = elf32_symload(&es, fp, foff, elf_symadd, &names);
stab = es.stab;
stabsize = es.stabsz;
}
free(es.shstr);
free(es.shdr);
if (i)
return (i);
} else if (!elf64_chk_header(&head->elf64)) {
struct elf_symtab es;
es.name = name;
es.ehdr = &head->elf64;
if (head->elf64.e_ehsize < sizeof head->elf64) {
warnx("%s: ELF header is too short", name);
return 1;
}
if (!(es.shdr = elf64_load_shdrs(name, fp, foff, es.ehdr)))
return (1);
elf64_fix_shdrs(es.ehdr, es.shdr);
es.shstr = NULL;
if (issize)
i = elf64_size(es.ehdr, es.shdr, &text, &data, &bss);
else {
nrawnames = 0;
names = NULL;
i = elf64_symload(&es, fp, foff, elf_symadd, &names);
stab = es.stab;
stabsize = es.stabsz;
}
free(es.shstr);
free(es.shdr);
if (i)
return (i);
} else if (BAD_OBJECT(head->aout)) {
if (warn_fmt)
warnx("%s: bad format", name);
return (1);
} else do {
u_int32_t w;
aout++;
fix_header_order(&head->aout);
if (issize) {
text = head->aout.a_text;
data = head->aout.a_data;
bss = head->aout.a_bss;
break;
}
/* stop if the object file contains no symbol table */
if (!head->aout.a_syms) {
warnx("%s: no name list", name);
return(1);
}
if (fseeko(fp, foff + N_SYMOFF(head->aout), SEEK_SET)) {
warn("%s", name);
return(1);
}
#ifdef __LP64__
nrawnames = head->aout.a_syms / sizeof(struct nlist32);
#else
nrawnames = head->aout.a_syms / sizeof(*names);
#endif
/* get memory for the symbol table */
if ((names = calloc(nrawnames, sizeof(struct nlist))) == NULL) {
warn("%s: malloc names", name);
return (1);
}
#ifdef __LP64__
for (np = names, i = nrawnames; i--; np++) {
struct nlist32 nl32;
if (fread(&nl32, sizeof(nl32), 1, fp) != 1) {
warnx("%s: cannot read symbol table", name);
free(names);
return (1);
}
np->n_type = nl32.type;
np->n_other = nl32.other;
if (byte_sex(N_GETMID(head->aout)) != BYTE_ORDER) {
np->n_un.n_strx = swap32(nl32.strx);
np->n_desc = swap16(nl32.desc);
np->n_value = swap32(nl32.value);
} else {
np->n_un.n_strx = nl32.strx;
np->n_desc = nl32.desc;
np->n_value = nl32.value;
}
}
#else
if (fread(names, head->aout.a_syms, 1, fp) != 1) {
warnx("%s: cannot read symbol table", name);
free(names);
return (1);
}
fix_nlists_order(names, nrawnames, N_GETMID(head->aout));
#endif
staboff = ftello(fp);
/*
* Following the symbol table comes the string table.
* The first 4-byte-integer gives the total size of the
* string table _including_ the size specification itself.
*/
if (fread(&w, sizeof(w), (size_t)1, fp) != 1) {
warnx("%s: cannot read stab size", name);
free(names);
return(1);
}
stabsize = fix_32_order(w, N_GETMID(head->aout));
if ((stab = malloc(stabsize)) == NULL) {
warn("%s: malloc", name);
return 1;
}
if (pread(fileno(fp), stab, stabsize, staboff) != stabsize) {
free(stab);
warn("%s: pread", name);
return 1;
}
stabsize -= 4; /* we already have the size */
for (np = names, i = nnames = 0; i < nrawnames; np++, i++) {
/*
* make n_un.n_name a character pointer by adding
* the string table's base to n_un.n_strx
*
* don't mess with zero offsets
*/
if (np->n_un.n_strx)
np->n_un.n_name = stab + np->n_un.n_strx;
else
np->n_un.n_name = "";
}
} while (0);
if (issize) {
static int first = 1;
if (first) {
first = 0;
printf("text\tdata\tbss\tdec\thex\n");
}
total = text + data + bss;
printf("%lu\t%lu\t%lu\t%lu\t%lx",
text, data, bss, total, total);
if (count > 1)
(void)printf("\t%s", name);
total_text += text;
total_data += data;
total_bss += bss;
total_total += total;
printf("\n");
return (0);
}
/* else we are nm */
/*
* it seems that string table is sequential
* relative to the symbol table order
*/
if ((snames = calloc(nrawnames, sizeof *snames)) == NULL) {
warn("%s: malloc snames", name);
free(names);
return (1);
}
/*
* fix up the symbol table and filter out unwanted entries
*
* common symbols are characterized by a n_type of N_UNDF and a
* non-zero n_value -- change n_type to N_COMM for all such
* symbols to make life easier later.
*
* filter out all entries which we don't want to print anyway
*/
for (np = names, i = nnames = 0; i < nrawnames; np++, i++) {
if (aout && SYMBOL_TYPE(np->n_type) == N_UNDF && np->n_value)
np->n_type = N_COMM | (np->n_type & N_EXT);
if (!print_all_symbols && IS_DEBUGGER_SYMBOL(np->n_type))
continue;
if (print_only_external_symbols && !IS_EXTERNAL(np->n_type))
continue;
if (print_only_undefined_symbols &&
SYMBOL_TYPE(np->n_type) != N_UNDF)
continue;
snames[nnames++] = np;
}
/* sort the symbol table if applicable */
if (sfunc)
qsort(snames, (size_t)nnames, sizeof(*snames), sfunc);
if (count > 1)
(void)printf("\n%s:\n", name);
/* print out symbols */
for (i = 0; i < nnames; i++) {
if (show_extensions && snames[i] != names &&
SYMBOL_TYPE((snames[i] -1)->n_type) == N_INDR)
continue;
print_symbol(name, snames[i], aout);
}
free(snames);
free(names);
free(stab);
return(0);
}
/*
* Read in program from the given file descriptor.
* Return error code (0 on success).
* Fill in marks.
*/
int
fdloadfile(int fd, u_long *marks, int flags)
{
union {
#ifdef BOOT_ECOFF
struct ecoff_exechdr coff;
#endif
#ifdef BOOT_ELF32
Elf32_Ehdr elf32;
#endif
#ifdef BOOT_ELF64
Elf64_Ehdr elf64;
#endif
#ifdef BOOT_AOUT
struct exec aout;
#endif
} hdr;
ssize_t nr;
int rval;
/* Read the exec header. */
if (lseek(fd, 0, SEEK_SET) == (off_t)-1)
goto err;
nr = read(fd, &hdr, sizeof(hdr));
if (nr == -1) {
WARN(("read header failed"));
goto err;
}
if (nr != sizeof(hdr)) {
WARN(("read header short"));
errno = EFTYPE;
goto err;
}
#ifdef BOOT_ECOFF
if (!ECOFF_BADMAG(&hdr.coff)) {
rval = loadfile_coff(fd, &hdr.coff, marks, flags);
} else
#endif
#ifdef BOOT_ELF32
if (memcmp(hdr.elf32.e_ident, ELFMAG, SELFMAG) == 0 &&
hdr.elf32.e_ident[EI_CLASS] == ELFCLASS32) {
netbsd_elf_class = ELFCLASS32;
rval = loadfile_elf32(fd, &hdr.elf32, marks, flags);
} else
#endif
#ifdef BOOT_ELF64
if (memcmp(hdr.elf64.e_ident, ELFMAG, SELFMAG) == 0 &&
hdr.elf64.e_ident[EI_CLASS] == ELFCLASS64) {
netbsd_elf_class = ELFCLASS64;
rval = loadfile_elf64(fd, &hdr.elf64, marks, flags);
} else
#endif
#ifdef BOOT_AOUT
if (OKMAGIC(N_GETMAGIC(hdr.aout))
#ifndef NO_MID_CHECK
&& N_GETMID(hdr.aout) == MID_MACHINE
#endif
) {
rval = loadfile_aout(fd, &hdr.aout, marks, flags);
} else
#endif
{
rval = 1;
errno = EFTYPE;
}
if (rval == 0) {
if ((flags & LOAD_ALL) != 0)
PROGRESS(("=0x%lx\n",
marks[MARK_END] - marks[MARK_START]));
return 0;
}
err:
return errno;
}
