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Make it work for a different endianness binary.

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(This version is still limited to ELF64.)

Reviewed by:	jake
This commit is contained in:
ru 2002-05-25 13:43:16 +00:00
parent 4eb7a2371e
commit d98e09267b
4 changed files with 62 additions and 94 deletions
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2
usr.bin/elf2aout/Makefile
View File

@ -1,6 +1,8 @@
# $FreeBSD$
PROG= elf2aout
CFLAGS+=-I${.CURDIR}/../crunch/crunchide
WARNS?= 5
NOMAN=
.include <bsd.prog.mk>

76
usr.bin/elf2aout/elf2aout.c
View File

@ -27,42 +27,21 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/elf64.h>
#if __FreeBSD_version >= 500034
#include <sys/endian.h>
#else
#include <machine/endian.h>
#if BYTE_ORDER == LITTLE_ENDIAN
#define bswap16(x) \
((x >> 8) | (x << 8))
#define bswap32(x) \
((x >> 24) | ((x >> 8) & 0xff00) | ((x << 8) & 0xff0000) | (x << 24))
#define bswap64(x) \
((x >> 56) | ((x >> 40) & 0xff00) | ((x >> 24) & 0xff0000) | \
((x >> 8) & 0xff000000) | ((x << 8) & ((u_int64_t)0xff << 32)) | \
((x << 24) & ((u_int64_t)0xff << 40)) | \
((x << 40) & ((u_int64_t)0xff << 48)) | ((x << 56)))
#define be16toh(x) bswap16((x))
#define be32toh(x) bswap32((x))
#define be64toh(x) bswap64((x))
#define htobe32(x) bswap32((x))
#else
#define be16toh(x) (x)
#define be32toh(x) (x)
#define be64toh(x) (x)
#define htobe32(x) (x)
#endif
#endif
#include <sys/mman.h>
#include <sys/stat.h>
#include <err.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include "endian.h"
#define xe16toh(x) ((data == ELFDATA2MSB) ? be16toh(x) : le16toh(x))
#define xe32toh(x) ((data == ELFDATA2MSB) ? be32toh(x) : le32toh(x))
#define xe64toh(x) ((data == ELFDATA2MSB) ? be64toh(x) : le64toh(x))
#define htoxe32(x) ((data == ELFDATA2MSB) ? htobe32(x) : htole32(x))
struct exec {
u_int32_t a_magic;
@ -96,6 +75,7 @@ main(int ac, char **av)
Elf64_Off offset;
Elf64_Off phoff;
Elf64_Half type;
unsigned char data;
struct stat sb;
struct exec a;
Elf64_Phdr *p;
@ -106,6 +86,7 @@ main(int ac, char **av)
int c;
int i;
fd = STDIN_FILENO;
while ((c = getopt(ac, av, "o:")) != -1)
switch (c) {
case 'o':
@ -131,37 +112,38 @@ main(int ac, char **av)
errx(1, "not an elf file");
if (e->e_ident[EI_CLASS] != ELFCLASS64)
errx(1, "wrong class");
if (e->e_ident[EI_DATA] != ELFDATA2MSB)
data = e->e_ident[EI_DATA];
if (data != ELFDATA2MSB && data != ELFDATA2LSB)
errx(1, "wrong data format");
if (e->e_ident[EI_VERSION] != EV_CURRENT)
errx(1, "wrong elf version");
machine = be16toh(e->e_machine);
if (machine != EM_SPARCV9)
machine = xe16toh(e->e_machine);
if (machine != EM_SPARCV9 && machine != EM_ALPHA)
errx(1, "wrong machine type");
phentsize = be16toh(e->e_phentsize);
phentsize = xe16toh(e->e_phentsize);
if (phentsize != sizeof(*p))
errx(1, "phdr size mismatch");
entry = be64toh(e->e_entry);
phoff = be64toh(e->e_phoff);
phnum = be16toh(e->e_phnum);
entry = xe64toh(e->e_entry);
phoff = xe64toh(e->e_phoff);
phnum = xe16toh(e->e_phnum);
p = (Elf64_Phdr *)((char *)e + phoff);
bzero(&a, sizeof(a));
for (i = 0; i < phnum; i++) {
type = be32toh(p[i].p_type);
type = xe32toh(p[i].p_type);
switch (type) {
case PT_LOAD:
if (a.a_magic != 0)
errx(1, "too many loadable segments");
filesz = be64toh(p[i].p_filesz);
memsz = be64toh(p[i].p_memsz);
offset = be64toh(p[i].p_offset);
a.a_magic = htobe32(A_MAGIC);
a.a_text = htobe32(filesz);
a.a_bss = htobe32(memsz - filesz);
a.a_entry = htobe32(entry);
filesz = xe64toh(p[i].p_filesz);
memsz = xe64toh(p[i].p_memsz);
offset = xe64toh(p[i].p_offset);
a.a_magic = htoxe32(A_MAGIC);
a.a_text = htoxe32(filesz);
a.a_bss = htoxe32(memsz - filesz);
a.a_entry = htoxe32(entry);
if (write(fd, &a, sizeof(a)) != sizeof(a) ||
write(fd, (char *)e + offset, filesz) != filesz)
write(fd, (char *)e + offset, filesz) != (ssize_t)filesz)
err(1, NULL);
break;
default:
@ -176,5 +158,5 @@ static void
usage(void)
{
errx(1, "usage: elftoaout -o outfile infile");
errx(1, "usage: elf2aout [-o outfile] infile");
}

2
usr.sbin/elf2aout/Makefile
View File

@ -1,6 +1,8 @@
# $FreeBSD$
PROG= elf2aout
CFLAGS+=-I${.CURDIR}/../crunch/crunchide
WARNS?= 5
NOMAN=
.include <bsd.prog.mk>

76
usr.sbin/elf2aout/elf2aout.c
View File

@ -27,42 +27,21 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/elf64.h>
#if __FreeBSD_version >= 500034
#include <sys/endian.h>
#else
#include <machine/endian.h>
#if BYTE_ORDER == LITTLE_ENDIAN
#define bswap16(x) \
((x >> 8) | (x << 8))
#define bswap32(x) \
((x >> 24) | ((x >> 8) & 0xff00) | ((x << 8) & 0xff0000) | (x << 24))
#define bswap64(x) \
((x >> 56) | ((x >> 40) & 0xff00) | ((x >> 24) & 0xff0000) | \
((x >> 8) & 0xff000000) | ((x << 8) & ((u_int64_t)0xff << 32)) | \
((x << 24) & ((u_int64_t)0xff << 40)) | \
((x << 40) & ((u_int64_t)0xff << 48)) | ((x << 56)))
#define be16toh(x) bswap16((x))
#define be32toh(x) bswap32((x))
#define be64toh(x) bswap64((x))
#define htobe32(x) bswap32((x))
#else
#define be16toh(x) (x)
#define be32toh(x) (x)
#define be64toh(x) (x)
#define htobe32(x) (x)
#endif
#endif
#include <sys/mman.h>
#include <sys/stat.h>
#include <err.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include "endian.h"
#define xe16toh(x) ((data == ELFDATA2MSB) ? be16toh(x) : le16toh(x))
#define xe32toh(x) ((data == ELFDATA2MSB) ? be32toh(x) : le32toh(x))
#define xe64toh(x) ((data == ELFDATA2MSB) ? be64toh(x) : le64toh(x))
#define htoxe32(x) ((data == ELFDATA2MSB) ? htobe32(x) : htole32(x))
struct exec {
u_int32_t a_magic;
@ -96,6 +75,7 @@ main(int ac, char **av)
Elf64_Off offset;
Elf64_Off phoff;
Elf64_Half type;
unsigned char data;
struct stat sb;
struct exec a;
Elf64_Phdr *p;
@ -106,6 +86,7 @@ main(int ac, char **av)
int c;
int i;
fd = STDIN_FILENO;
while ((c = getopt(ac, av, "o:")) != -1)
switch (c) {
case 'o':
@ -131,37 +112,38 @@ main(int ac, char **av)
errx(1, "not an elf file");
if (e->e_ident[EI_CLASS] != ELFCLASS64)
errx(1, "wrong class");
if (e->e_ident[EI_DATA] != ELFDATA2MSB)
data = e->e_ident[EI_DATA];
if (data != ELFDATA2MSB && data != ELFDATA2LSB)
errx(1, "wrong data format");
if (e->e_ident[EI_VERSION] != EV_CURRENT)
errx(1, "wrong elf version");
machine = be16toh(e->e_machine);
if (machine != EM_SPARCV9)
machine = xe16toh(e->e_machine);
if (machine != EM_SPARCV9 && machine != EM_ALPHA)
errx(1, "wrong machine type");
phentsize = be16toh(e->e_phentsize);
phentsize = xe16toh(e->e_phentsize);
if (phentsize != sizeof(*p))
errx(1, "phdr size mismatch");
entry = be64toh(e->e_entry);
phoff = be64toh(e->e_phoff);
phnum = be16toh(e->e_phnum);
entry = xe64toh(e->e_entry);
phoff = xe64toh(e->e_phoff);
phnum = xe16toh(e->e_phnum);
p = (Elf64_Phdr *)((char *)e + phoff);
bzero(&a, sizeof(a));
for (i = 0; i < phnum; i++) {
type = be32toh(p[i].p_type);
type = xe32toh(p[i].p_type);
switch (type) {
case PT_LOAD:
if (a.a_magic != 0)
errx(1, "too many loadable segments");
filesz = be64toh(p[i].p_filesz);
memsz = be64toh(p[i].p_memsz);
offset = be64toh(p[i].p_offset);
a.a_magic = htobe32(A_MAGIC);
a.a_text = htobe32(filesz);
a.a_bss = htobe32(memsz - filesz);
a.a_entry = htobe32(entry);
filesz = xe64toh(p[i].p_filesz);
memsz = xe64toh(p[i].p_memsz);
offset = xe64toh(p[i].p_offset);
a.a_magic = htoxe32(A_MAGIC);
a.a_text = htoxe32(filesz);
a.a_bss = htoxe32(memsz - filesz);
a.a_entry = htoxe32(entry);
if (write(fd, &a, sizeof(a)) != sizeof(a) ||
write(fd, (char *)e + offset, filesz) != filesz)
write(fd, (char *)e + offset, filesz) != (ssize_t)filesz)
err(1, NULL);
break;
default:
@ -176,5 +158,5 @@ static void
usage(void)
{
errx(1, "usage: elftoaout -o outfile infile");
errx(1, "usage: elf2aout [-o outfile] infile");
}