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freebsd-dev/contrib/elftoolchain/elfcopy/ascii.c
Ed Maste b6d812d2dd Update to ELF Tool Chain r3490 
Improvements include:
 * readelf: report all relocation types in rel/rela for MIPS N64
 * readelf: add ELFOSABI_ARM_AEABI
 * elfdump: add ELFOSABI_ARM_AEABI and ELFOSABI_ARM
 * Add recent RISC-V relocations
 * elfcopy: use elftc_timestamp, to support SOURCE_DATE_EPOCH

Sponsored by:	The FreeBSD Foundation
2016-08-31 15:05:04 +00:00

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/*-
* Copyright (c) 2010,2011 Kai Wang
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <ctype.h>
#include <err.h>
#include <gelf.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "elfcopy.h"
ELFTC_VCSID("$Id: ascii.c 3487 2016-08-24 18:12:08Z emaste $");
static void append_data(struct section *s, const void *buf, size_t sz);
static char hex_digit(uint8_t n);
static int hex_value(int x);
static void finalize_data_section(struct section *s);
static int ishexdigit(int x);
static int ihex_read(const char *line, char *type, uint64_t *addr,
uint64_t *num, uint8_t *data, size_t *sz);
static void ihex_write(int ofd, int type, uint64_t addr, uint64_t num,
const void *buf, size_t sz);
static void ihex_write_00(int ofd, uint64_t addr, const void *buf, size_t sz);
static void ihex_write_01(int ofd);
static void ihex_write_04(int ofd, uint16_t addr);
static void ihex_write_05(int ofd, uint64_t e_entry);
static struct section *new_data_section(struct elfcopy *ecp, int sec_index,
uint64_t off, uint64_t addr);
static int read_num(const char *line, int *len, uint64_t *num, size_t sz,
int *checksum);
static int srec_read(const char *line, char *type, uint64_t *addr,
uint8_t *data, size_t *sz);
static void srec_write(int ofd, char type, uint64_t addr, const void *buf,
size_t sz);
static void srec_write_symtab(int ofd, const char *ofn, Elf *e, Elf_Scn *scn,
GElf_Shdr *sh);
static void srec_write_S0(int ofd, const char *ofn);
static void srec_write_Sd(int ofd, char dr, uint64_t addr, const void *buf,
size_t sz, size_t rlen);
static void srec_write_Se(int ofd, uint64_t e_entry, int forceS3);
static void write_num(char *line, int *len, uint64_t num, size_t sz,
int *checksum);
#define _LINE_BUFSZ 1024
#define _DATA_BUFSZ 256
/*
* Convert ELF object to S-Record.
*/
void
create_srec(struct elfcopy *ecp, int ifd, int ofd, const char *ofn)
{
Elf *e;
Elf_Scn *scn;
Elf_Data *d;
GElf_Ehdr eh;
GElf_Shdr sh;
uint64_t max_addr;
size_t rlen;
int elferr, addr_sz;
char dr;
if ((e = elf_begin(ifd, ELF_C_READ, NULL)) == NULL)
errx(EXIT_FAILURE, "elf_begin() failed: %s",
elf_errmsg(-1));
/* Output a symbol table for `symbolsrec' target. */
if (!strncmp(ecp->otgt, "symbolsrec", strlen("symbolsrec"))) {
scn = NULL;
while ((scn = elf_nextscn(e, scn)) != NULL) {
if (gelf_getshdr(scn, &sh) == NULL) {
warnx("gelf_getshdr failed: %s",
elf_errmsg(-1));
(void) elf_errno();
continue;
}
if (sh.sh_type != SHT_SYMTAB)
continue;
srec_write_symtab(ofd, ofn, e, scn, &sh);
break;
}
}
if (ecp->flags & SREC_FORCE_S3)
dr = '3';
else {
/*
* Find maximum address size in the first iteration.
*/
max_addr = 0;
scn = NULL;
while ((scn = elf_nextscn(e, scn)) != NULL) {
if (gelf_getshdr(scn, &sh) == NULL) {
warnx("gelf_getshdr failed: %s",
elf_errmsg(-1));
(void) elf_errno();
continue;
}
if ((sh.sh_flags & SHF_ALLOC) == 0 ||
sh.sh_type == SHT_NOBITS ||
sh.sh_size == 0)
continue;
if ((uint64_t) sh.sh_addr > max_addr)
max_addr = sh.sh_addr;
}
elferr = elf_errno();
if (elferr != 0)
warnx("elf_nextscn failed: %s", elf_errmsg(elferr));
if (max_addr <= 0xFFFF)
dr = '1';
else if (max_addr <= 0xFFFFFF)
dr = '2';
else
dr = '3';
}
if (ecp->flags & SREC_FORCE_LEN) {
addr_sz = dr - '0' + 1;
if (ecp->srec_len < 1)
rlen = 1;
else if (ecp->srec_len + addr_sz + 1 > 255)
rlen = 255 - (addr_sz + 1);
else
rlen = ecp->srec_len;
} else
rlen = 16;
/* Generate S0 record which contains the output filename. */
srec_write_S0(ofd, ofn);
/* Generate S{1,2,3} data records for section data. */
scn = NULL;
while ((scn = elf_nextscn(e, scn)) != NULL) {
if (gelf_getshdr(scn, &sh) == NULL) {
warnx("gelf_getshdr failed: %s", elf_errmsg(-1));
(void) elf_errno();
continue;
}
if ((sh.sh_flags & SHF_ALLOC) == 0 ||
sh.sh_type == SHT_NOBITS ||
sh.sh_size == 0)
continue;
if (sh.sh_addr > 0xFFFFFFFF) {
warnx("address space too big for S-Record file");
continue;
}
(void) elf_errno();
if ((d = elf_getdata(scn, NULL)) == NULL) {
elferr = elf_errno();
if (elferr != 0)
warnx("elf_getdata failed: %s", elf_errmsg(-1));
continue;
}
if (d->d_buf == NULL || d->d_size == 0)
continue;
srec_write_Sd(ofd, dr, sh.sh_addr, d->d_buf, d->d_size, rlen);
}
elferr = elf_errno();
if (elferr != 0)
warnx("elf_nextscn failed: %s", elf_errmsg(elferr));
/* Generate S{7,8,9} end of block record. */
if (gelf_getehdr(e, &eh) == NULL)
errx(EXIT_FAILURE, "gelf_getehdr() failed: %s",
elf_errmsg(-1));
srec_write_Se(ofd, eh.e_entry, ecp->flags & SREC_FORCE_S3);
}
void
create_elf_from_srec(struct elfcopy *ecp, int ifd)
{
char line[_LINE_BUFSZ], name[_LINE_BUFSZ];
uint8_t data[_DATA_BUFSZ];
GElf_Ehdr oeh;
struct section *s, *shtab;
FILE *ifp;
uint64_t addr, entry, off, sec_addr;
uintmax_t st_value;
size_t sz;
int _ifd, first, sec_index, in_symtab, symtab_created;
char *rlt;
char type;
if ((_ifd = dup(ifd)) < 0)
err(EXIT_FAILURE, "dup failed");
if ((ifp = fdopen(_ifd, "r")) == NULL)
err(EXIT_FAILURE, "fdopen failed");
/* Create EHDR for output .o file. */
if (gelf_newehdr(ecp->eout, ecp->oec) == NULL)
errx(EXIT_FAILURE, "gelf_newehdr failed: %s",
elf_errmsg(-1));
if (gelf_getehdr(ecp->eout, &oeh) == NULL)
errx(EXIT_FAILURE, "gelf_getehdr() failed: %s",
elf_errmsg(-1));
/* Initialise e_ident fields. */
oeh.e_ident[EI_CLASS] = ecp->oec;
oeh.e_ident[EI_DATA] = ecp->oed;
/*
* TODO: Set OSABI according to the OS platform where elfcopy(1)
* was build. (probably)
*/
oeh.e_ident[EI_OSABI] = ELFOSABI_NONE;
oeh.e_machine = ecp->oem;
oeh.e_type = ET_REL;
oeh.e_entry = 0;
ecp->flags |= RELOCATABLE;
/* Create .shstrtab section */
init_shstrtab(ecp);
ecp->shstrtab->off = 0;
/* Data sections are inserted after EHDR. */
off = gelf_fsize(ecp->eout, ELF_T_EHDR, 1, EV_CURRENT);
if (off == 0)
errx(EXIT_FAILURE, "gelf_fsize() failed: %s", elf_errmsg(-1));
/* Create data sections. */
s = NULL;
first = 1;
sec_index = 1;
sec_addr = entry = 0;
while (fgets(line, _LINE_BUFSZ, ifp) != NULL) {
sz = 0;
if (line[0] == '\r' || line[0] == '\n')
continue;
if (line[0] == '$' && line[1] == '$') {
ecp->flags |= SYMTAB_EXIST;
while ((rlt = fgets(line, _LINE_BUFSZ, ifp)) != NULL) {
if (line[0] == '$' && line[1] == '$')
break;
}
if (rlt == NULL)
break;
continue;
}
if (line[0] != 'S' || line[1] < '0' || line[1] > '9') {
warnx("Invalid srec record");
continue;
}
if (srec_read(line, &type, &addr, data, &sz) < 0) {
warnx("Invalid srec record or mismatched checksum");
continue;
}
switch (type) {
case '1':
case '2':
case '3':
if (sz == 0)
break;
if (first || sec_addr != addr) {
if (s != NULL)
finalize_data_section(s);
s = new_data_section(ecp, sec_index, off,
addr);
if (s == NULL) {
warnx("new_data_section failed");
break;
}
sec_index++;
sec_addr = addr;
first = 0;
}
append_data(s, data, sz);
off += sz;
sec_addr += sz;
break;
case '7':
case '8':
case '9':
entry = addr;
break;
default:
break;
}
}
if (s != NULL)
finalize_data_section(s);
if (ferror(ifp))
warn("fgets failed");
/* Insert .shstrtab after data sections. */
if ((ecp->shstrtab->os = elf_newscn(ecp->eout)) == NULL)
errx(EXIT_FAILURE, "elf_newscn failed: %s",
elf_errmsg(-1));
insert_to_sec_list(ecp, ecp->shstrtab, 1);
/* Insert section header table here. */
shtab = insert_shtab(ecp, 1);
/*
* Rescan and create symbol table if we found '$$' section in
* the first scan.
*/
symtab_created = 0;
in_symtab = 0;
if (ecp->flags & SYMTAB_EXIST) {
if (fseek(ifp, 0, SEEK_SET) < 0) {
warn("fseek failed");
ecp->flags &= ~SYMTAB_EXIST;
goto done;
}
while (fgets(line, _LINE_BUFSZ, ifp) != NULL) {
if (in_symtab) {
if (line[0] == '$' && line[1] == '$') {
in_symtab = 0;
continue;
}
if (sscanf(line, "%s $%jx", name,
&st_value) != 2) {
warnx("Invalid symbolsrec record");
continue;
}
if (!symtab_created) {
create_external_symtab(ecp);
symtab_created = 1;
}
add_to_symtab(ecp, name, st_value, 0, SHN_ABS,
ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0, 1);
}
if (line[0] == '$' && line[1] == '$') {
in_symtab = 1;
continue;
}
}
}
if (ferror(ifp))
warn("fgets failed");
if (symtab_created) {
finalize_external_symtab(ecp);
create_symtab_data(ecp);
/* Count in .symtab and .strtab section headers. */
shtab->sz += gelf_fsize(ecp->eout, ELF_T_SHDR, 2, EV_CURRENT);
} else
ecp->flags &= ~SYMTAB_EXIST;
done:
fclose(ifp);
/* Set entry point. */
oeh.e_entry = entry;
/*
* Write the underlying ehdr. Note that it should be called
* before elf_setshstrndx() since it will overwrite e->e_shstrndx.
*/
if (gelf_update_ehdr(ecp->eout, &oeh) == 0)
errx(EXIT_FAILURE, "gelf_update_ehdr() failed: %s",
elf_errmsg(-1));
/* Generate section name string table (.shstrtab). */
set_shstrtab(ecp);
/* Update sh_name pointer for each section header entry. */
update_shdr(ecp, 0);
/* Renew oeh to get the updated e_shstrndx. */
if (gelf_getehdr(ecp->eout, &oeh) == NULL)
errx(EXIT_FAILURE, "gelf_getehdr() failed: %s",
elf_errmsg(-1));
/* Resync section offsets. */
resync_sections(ecp);
/* Store SHDR offset in EHDR. */
oeh.e_shoff = shtab->off;
/* Update ehdr since we modified e_shoff. */
if (gelf_update_ehdr(ecp->eout, &oeh) == 0)
errx(EXIT_FAILURE, "gelf_update_ehdr() failed: %s",
elf_errmsg(-1));
/* Write out the output elf object. */
if (elf_update(ecp->eout, ELF_C_WRITE) < 0)
errx(EXIT_FAILURE, "elf_update() failed: %s",
elf_errmsg(-1));
/* Release allocated resource. */
free_elf(ecp);
}
void
create_ihex(int ifd, int ofd)
{
Elf *e;
Elf_Scn *scn;
Elf_Data *d;
GElf_Ehdr eh;
GElf_Shdr sh;
int elferr;
uint16_t addr_hi, old_addr_hi;
if ((e = elf_begin(ifd, ELF_C_READ, NULL)) == NULL)
errx(EXIT_FAILURE, "elf_begin() failed: %s",
elf_errmsg(-1));
old_addr_hi = 0;
scn = NULL;
while ((scn = elf_nextscn(e, scn)) != NULL) {
if (gelf_getshdr(scn, &sh) == NULL) {
warnx("gelf_getshdr failed: %s", elf_errmsg(-1));
(void) elf_errno();
continue;
}
if ((sh.sh_flags & SHF_ALLOC) == 0 ||
sh.sh_type == SHT_NOBITS ||
sh.sh_size == 0)
continue;
if (sh.sh_addr > 0xFFFFFFFF) {
warnx("address space too big for Intel Hex file");
continue;
}
(void) elf_errno();
if ((d = elf_getdata(scn, NULL)) == NULL) {
elferr = elf_errno();
if (elferr != 0)
warnx("elf_getdata failed: %s", elf_errmsg(-1));
continue;
}
if (d->d_buf == NULL || d->d_size == 0)
continue;
addr_hi = (sh.sh_addr >> 16) & 0xFFFF;
if (addr_hi > 0 && addr_hi != old_addr_hi) {
/* Write 04 record if addr_hi is new. */
old_addr_hi = addr_hi;
ihex_write_04(ofd, addr_hi);
}
ihex_write_00(ofd, sh.sh_addr, d->d_buf, d->d_size);
}
elferr = elf_errno();
if (elferr != 0)
warnx("elf_nextscn failed: %s", elf_errmsg(elferr));
if (gelf_getehdr(e, &eh) == NULL)
errx(EXIT_FAILURE, "gelf_getehdr() failed: %s",
elf_errmsg(-1));
ihex_write_05(ofd, eh.e_entry);
ihex_write_01(ofd);
}
void
create_elf_from_ihex(struct elfcopy *ecp, int ifd)
{
char line[_LINE_BUFSZ];
uint8_t data[_DATA_BUFSZ];
GElf_Ehdr oeh;
struct section *s, *shtab;
FILE *ifp;
uint64_t addr, addr_base, entry, num, off, rec_addr, sec_addr;
size_t sz;
int _ifd, first, sec_index;
char type;
if ((_ifd = dup(ifd)) < 0)
err(EXIT_FAILURE, "dup failed");
if ((ifp = fdopen(_ifd, "r")) == NULL)
err(EXIT_FAILURE, "fdopen failed");
/* Create EHDR for output .o file. */
if (gelf_newehdr(ecp->eout, ecp->oec) == NULL)
errx(EXIT_FAILURE, "gelf_newehdr failed: %s",
elf_errmsg(-1));
if (gelf_getehdr(ecp->eout, &oeh) == NULL)
errx(EXIT_FAILURE, "gelf_getehdr() failed: %s",
elf_errmsg(-1));
/* Initialise e_ident fields. */
oeh.e_ident[EI_CLASS] = ecp->oec;
oeh.e_ident[EI_DATA] = ecp->oed;
/*
* TODO: Set OSABI according to the OS platform where elfcopy(1)
* was build. (probably)
*/
oeh.e_ident[EI_OSABI] = ELFOSABI_NONE;
oeh.e_machine = ecp->oem;
oeh.e_type = ET_REL;
oeh.e_entry = 0;
ecp->flags |= RELOCATABLE;
/* Create .shstrtab section */
init_shstrtab(ecp);
ecp->shstrtab->off = 0;
/* Data sections are inserted after EHDR. */
off = gelf_fsize(ecp->eout, ELF_T_EHDR, 1, EV_CURRENT);
if (off == 0)
errx(EXIT_FAILURE, "gelf_fsize() failed: %s", elf_errmsg(-1));
/* Create data sections. */
s = NULL;
first = 1;
sec_index = 1;
addr_base = rec_addr = sec_addr = entry = 0;
while (fgets(line, _LINE_BUFSZ, ifp) != NULL) {
if (line[0] == '\r' || line[0] == '\n')
continue;
if (line[0] != ':') {
warnx("Invalid ihex record");
continue;
}
if (ihex_read(line, &type, &addr, &num, data, &sz) < 0) {
warnx("Invalid ihex record or mismatched checksum");
continue;
}
switch (type) {
case '0':
/* Data record. */
if (sz == 0)
break;
rec_addr = addr_base + addr;
if (first || sec_addr != rec_addr) {
if (s != NULL)
finalize_data_section(s);
s = new_data_section(ecp, sec_index, off,
rec_addr);
if (s == NULL) {
warnx("new_data_section failed");
break;
}
sec_index++;
sec_addr = rec_addr;
first = 0;
}
append_data(s, data, sz);
off += sz;
sec_addr += sz;
break;
case '1':
/* End of file record. */
goto done;
case '2':
/* Extended segment address record. */
addr_base = addr << 4;
break;
case '3':
/* Start segment address record (CS:IP). Ignored. */
break;
case '4':
/* Extended linear address record. */
addr_base = num << 16;
break;
case '5':
/* Start linear address record. */
entry = num;
break;
default:
break;
}
}
done:
if (s != NULL)
finalize_data_section(s);
if (ferror(ifp))
warn("fgets failed");
fclose(ifp);
/* Insert .shstrtab after data sections. */
if ((ecp->shstrtab->os = elf_newscn(ecp->eout)) == NULL)
errx(EXIT_FAILURE, "elf_newscn failed: %s",
elf_errmsg(-1));
insert_to_sec_list(ecp, ecp->shstrtab, 1);
/* Insert section header table here. */
shtab = insert_shtab(ecp, 1);
/* Set entry point. */
oeh.e_entry = entry;
/*
* Write the underlying ehdr. Note that it should be called
* before elf_setshstrndx() since it will overwrite e->e_shstrndx.
*/
if (gelf_update_ehdr(ecp->eout, &oeh) == 0)
errx(EXIT_FAILURE, "gelf_update_ehdr() failed: %s",
elf_errmsg(-1));
/* Generate section name string table (.shstrtab). */
set_shstrtab(ecp);
/* Update sh_name pointer for each section header entry. */
update_shdr(ecp, 0);
/* Renew oeh to get the updated e_shstrndx. */
if (gelf_getehdr(ecp->eout, &oeh) == NULL)
errx(EXIT_FAILURE, "gelf_getehdr() failed: %s",
elf_errmsg(-1));
/* Resync section offsets. */
resync_sections(ecp);
/* Store SHDR offset in EHDR. */
oeh.e_shoff = shtab->off;
/* Update ehdr since we modified e_shoff. */
if (gelf_update_ehdr(ecp->eout, &oeh) == 0)
errx(EXIT_FAILURE, "gelf_update_ehdr() failed: %s",
elf_errmsg(-1));
/* Write out the output elf object. */
if (elf_update(ecp->eout, ELF_C_WRITE) < 0)
errx(EXIT_FAILURE, "elf_update() failed: %s",
elf_errmsg(-1));
/* Release allocated resource. */
free_elf(ecp);
}
#define _SEC_NAMESZ 64
#define _SEC_INIT_CAP 1024
static struct section *
new_data_section(struct elfcopy *ecp, int sec_index, uint64_t off,
uint64_t addr)
{
char *name;
if ((name = malloc(_SEC_NAMESZ)) == NULL)
errx(EXIT_FAILURE, "malloc failed");
snprintf(name, _SEC_NAMESZ, ".sec%d", sec_index);
return (create_external_section(ecp, name, name, NULL, 0, off,
SHT_PROGBITS, ELF_T_BYTE, SHF_ALLOC | SHF_WRITE, 1, addr, 0));
}
static void
finalize_data_section(struct section *s)
{
Elf_Data *od;
if ((od = elf_newdata(s->os)) == NULL)
errx(EXIT_FAILURE, "elf_newdata() failed: %s",
elf_errmsg(-1));
od->d_align = s->align;
od->d_off = 0;
od->d_buf = s->buf;
od->d_size = s->sz;
od->d_version = EV_CURRENT;
}
static void
append_data(struct section *s, const void *buf, size_t sz)
{
uint8_t *p;
if (s->buf == NULL) {
s->sz = 0;
s->cap = _SEC_INIT_CAP;
if ((s->buf = malloc(s->cap)) == NULL)
err(EXIT_FAILURE, "malloc failed");
}
while (sz + s->sz > s->cap) {
s->cap *= 2;
if ((s->buf = realloc(s->buf, s->cap)) == NULL)
err(EXIT_FAILURE, "realloc failed");
}
p = s->buf;
memcpy(&p[s->sz], buf, sz);
s->sz += sz;
}
static int
srec_read(const char *line, char *type, uint64_t *addr, uint8_t *data,
size_t *sz)
{
uint64_t count, _checksum, num;
size_t addr_sz;
int checksum, i, len;
checksum = 0;
len = 2;
if (read_num(line, &len, &count, 1, &checksum) < 0)
return (-1);
*type = line[1];
switch (*type) {
case '0':
case '1':
case '5':
case '9':
addr_sz = 2;
break;
case '2':
case '8':
addr_sz = 3;
break;
case '3':
case '7':
addr_sz = 4;
break;
default:
return (-1);
}
if (read_num(line, &len, addr, addr_sz, &checksum) < 0)
return (-1);
count -= addr_sz + 1;
if (*type >= '0' && *type <= '3') {
for (i = 0; (uint64_t) i < count; i++) {
if (read_num(line, &len, &num, 1, &checksum) < 0)
return -1;
data[i] = (uint8_t) num;
}
*sz = count;
} else
*sz = 0;
if (read_num(line, &len, &_checksum, 1, NULL) < 0)
return (-1);
if ((int) _checksum != (~checksum & 0xFF))
return (-1);
return (0);
}
static void
srec_write_symtab(int ofd, const char *ofn, Elf *e, Elf_Scn *scn, GElf_Shdr *sh)
{
char line[_LINE_BUFSZ];
GElf_Sym sym;
Elf_Data *d;
const char *name;
size_t sc;
int elferr, i;
#define _WRITE_LINE do { \
if (write(ofd, line, strlen(line)) != (ssize_t) strlen(line)) \
errx(EXIT_FAILURE, "write failed"); \
} while (0)
(void) elf_errno();
if ((d = elf_getdata(scn, NULL)) == NULL) {
elferr = elf_errno();
if (elferr != 0)
warnx("elf_getdata failed: %s",
elf_errmsg(-1));
return;
}
if (d->d_buf == NULL || d->d_size == 0)
return;
snprintf(line, sizeof(line), "$$ %s\r\n", ofn);
_WRITE_LINE;
sc = d->d_size / sh->sh_entsize;
for (i = 1; (size_t) i < sc; i++) {
if (gelf_getsym(d, i, &sym) != &sym) {
warnx("gelf_getsym failed: %s", elf_errmsg(-1));
continue;
}
if (GELF_ST_TYPE(sym.st_info) == STT_SECTION ||
GELF_ST_TYPE(sym.st_info) == STT_FILE)
continue;
if ((name = elf_strptr(e, sh->sh_link, sym.st_name)) == NULL) {
warnx("elf_strptr failed: %s", elf_errmsg(-1));
continue;
}
snprintf(line, sizeof(line), " %s $%jx\r\n", name,
(uintmax_t) sym.st_value);
_WRITE_LINE;
}
snprintf(line, sizeof(line), "$$ \r\n");
_WRITE_LINE;
#undef _WRITE_LINE
}
static void
srec_write_S0(int ofd, const char *ofn)
{
srec_write(ofd, '0', 0, ofn, strlen(ofn));
}
static void
srec_write_Sd(int ofd, char dr, uint64_t addr, const void *buf, size_t sz,
size_t rlen)
{
const uint8_t *p, *pe;
p = buf;
pe = p + sz;
while (pe - p >= (int) rlen) {
srec_write(ofd, dr, addr, p, rlen);
addr += rlen;
p += rlen;
}
if (pe - p > 0)
srec_write(ofd, dr, addr, p, pe - p);
}
static void
srec_write_Se(int ofd, uint64_t e_entry, int forceS3)
{
char er;
if (e_entry > 0xFFFFFFFF) {
warnx("address space too big for S-Record file");
return;
}
if (forceS3)
er = '7';
else {
if (e_entry <= 0xFFFF)
er = '9';
else if (e_entry <= 0xFFFFFF)
er = '8';
else
er = '7';
}
srec_write(ofd, er, e_entry, NULL, 0);
}
static void
srec_write(int ofd, char type, uint64_t addr, const void *buf, size_t sz)
{
char line[_LINE_BUFSZ];
const uint8_t *p, *pe;
int len, addr_sz, checksum;
if (type == '0' || type == '1' || type == '5' || type == '9')
addr_sz = 2;
else if (type == '2' || type == '8')
addr_sz = 3;
else
addr_sz = 4;
checksum = 0;
line[0] = 'S';
line[1] = type;
len = 2;
write_num(line, &len, addr_sz + sz + 1, 1, &checksum);
write_num(line, &len, addr, addr_sz, &checksum);
for (p = buf, pe = p + sz; p < pe; p++)
write_num(line, &len, *p, 1, &checksum);
write_num(line, &len, ~checksum & 0xFF, 1, NULL);
line[len++] = '\r';
line[len++] = '\n';
if (write(ofd, line, len) != (ssize_t) len)
err(EXIT_FAILURE, "write failed");
}
static void
ihex_write_00(int ofd, uint64_t addr, const void *buf, size_t sz)
{
uint16_t addr_hi, old_addr_hi;
const uint8_t *p, *pe;
old_addr_hi = (addr >> 16) & 0xFFFF;
p = buf;
pe = p + sz;
while (pe - p >= 16) {
ihex_write(ofd, 0, addr, 0, p, 16);
addr += 16;
p += 16;
addr_hi = (addr >> 16) & 0xFFFF;
if (addr_hi != old_addr_hi) {
old_addr_hi = addr_hi;
ihex_write_04(ofd, addr_hi);
}
}
if (pe - p > 0)
ihex_write(ofd, 0, addr, 0, p, pe - p);
}
static int
ihex_read(const char *line, char *type, uint64_t *addr, uint64_t *num,
uint8_t *data, size_t *sz)
{
uint64_t count, _checksum;
int checksum, i, len;
*sz = 0;
checksum = 0;
len = 1;
if (read_num(line, &len, &count, 1, &checksum) < 0)
return (-1);
if (read_num(line, &len, addr, 2, &checksum) < 0)
return (-1);
if (line[len++] != '0')
return (-1);
*type = line[len++];
checksum += *type - '0';
switch (*type) {
case '0':
for (i = 0; (uint64_t) i < count; i++) {
if (read_num(line, &len, num, 1, &checksum) < 0)
return (-1);
data[i] = (uint8_t) *num;
}
*sz = count;
break;
case '1':
if (count != 0)
return (-1);
break;
case '2':
case '4':
if (count != 2)
return (-1);
if (read_num(line, &len, num, 2, &checksum) < 0)
return (-1);
break;
case '3':
case '5':
if (count != 4)
return (-1);
if (read_num(line, &len, num, 4, &checksum) < 0)
return (-1);
break;
default:
return (-1);
}
if (read_num(line, &len, &_checksum, 1, &checksum) < 0)
return (-1);
if ((checksum & 0xFF) != 0) {
return (-1);
}
return (0);
}
static void
ihex_write_01(int ofd)
{
ihex_write(ofd, 1, 0, 0, NULL, 0);
}
static void
ihex_write_04(int ofd, uint16_t addr)
{
ihex_write(ofd, 4, 0, addr, NULL, 2);
}
static void
ihex_write_05(int ofd, uint64_t e_entry)
{
if (e_entry > 0xFFFFFFFF) {
warnx("address space too big for Intel Hex file");
return;
}
ihex_write(ofd, 5, 0, e_entry, NULL, 4);
}
static void
ihex_write(int ofd, int type, uint64_t addr, uint64_t num, const void *buf,
size_t sz)
{
char line[_LINE_BUFSZ];
const uint8_t *p, *pe;
int len, checksum;
if (sz > 16)
errx(EXIT_FAILURE, "Internal: ihex_write() sz too big");
checksum = 0;
line[0] = ':';
len = 1;
write_num(line, &len, sz, 1, &checksum);
write_num(line, &len, addr, 2, &checksum);
write_num(line, &len, type, 1, &checksum);
if (sz > 0) {
if (buf != NULL) {
for (p = buf, pe = p + sz; p < pe; p++)
write_num(line, &len, *p, 1, &checksum);
} else
write_num(line, &len, num, sz, &checksum);
}
write_num(line, &len, (~checksum + 1) & 0xFF, 1, NULL);
line[len++] = '\r';
line[len++] = '\n';
if (write(ofd, line, len) != (ssize_t) len)
err(EXIT_FAILURE, "write failed");
}
static int
read_num(const char *line, int *len, uint64_t *num, size_t sz, int *checksum)
{
uint8_t b;
*num = 0;
for (; sz > 0; sz--) {
if (!ishexdigit(line[*len]) || !ishexdigit(line[*len + 1]))
return (-1);
b = (hex_value(line[*len]) << 4) | hex_value(line[*len + 1]);
*num = (*num << 8) | b;
*len += 2;
if (checksum != NULL)
*checksum = (*checksum + b) & 0xFF;
}
return (0);
}
static void
write_num(char *line, int *len, uint64_t num, size_t sz, int *checksum)
{
uint8_t b;
for (; sz > 0; sz--) {
b = (num >> ((sz - 1) * 8)) & 0xFF;
line[*len] = hex_digit((b >> 4) & 0xF);
line[*len + 1] = hex_digit(b & 0xF);
*len += 2;
if (checksum != NULL)
*checksum = (*checksum + b) & 0xFF;
}
}
static char
hex_digit(uint8_t n)
{
return ((n < 10) ? '0' + n : 'A' + (n - 10));
}
static int
hex_value(int x)
{
if (isdigit(x))
return (x - '0');
else if (x >= 'a' && x <= 'f')
return (x - 'a' + 10);
else
return (x - 'A' + 10);
}
static int
ishexdigit(int x)
{
if (isdigit(x))
return (1);
if ((x >= 'a' && x <= 'f') || (x >= 'A' && x <= 'F'))
return (1);
return (0);
}
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