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ar: implement support for /SYM64/ 64-bit archives

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PR:		234454
Submitted by:	Gerald Aryeetey <aryeeteygerald_rogers.com>
Reviewed by:	imp (earlier)
MFC after:	3 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D18793
This commit is contained in:
Ed Maste 2019-04-10 13:13:34 +00:00
parent 691d4ab6f0
commit fabed6b2bd
3 changed files with 51 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
usr.bin/ar/ar.h
View File

@ -100,9 +100,11 @@ struct bsdar {
/*
* Fields for the archive symbol table.
*/
uint32_t s_cnt; /* current number of symbols. */
uint32_t *s_so; /* symbol offset table. */
uint64_t s_cnt; /* current number of symbols. */
uint64_t *s_so; /* symbol offset table. */
uint64_t s_so_max; /* maximum symbol offset. */
size_t s_so_cap; /* capacity of so table buffer. */
char *s_sn; /* symbol name table */
size_t s_sn_cap; /* capacity of sn table buffer. */
size_t s_sn_sz; /* current size of sn table. */

3
usr.bin/ar/read.c
View File

@ -109,7 +109,8 @@ read_archive(struct bsdar *bsdar, char mode)
break;
/* Skip pseudo members. */
if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0)
if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0 ||
strcmp(name, "/SYM64/") == 0)
continue;
if (bsdar->argc > 0) {

63
usr.bin/ar/write.c
View File

@ -50,7 +50,7 @@ __FBSDID("$FreeBSD$");
#define _ARMAG_LEN 8 /* length of ar magic string */
#define _ARHDR_LEN 60 /* length of ar header */
#define _INIT_AS_CAP 128 /* initial archive string table size */
#define _INIT_SYMOFF_CAP (256*(sizeof(uint32_t))) /* initial so table size */
#define _INIT_SYMOFF_CAP (256*(sizeof(uint64_t))) /* initial so table size */
#define _INIT_SYMNAME_CAP 1024 /* initial sn table size */
#define _MAXNAMELEN_SVR4 15 /* max member name length in svr4 variant */
#define _TRUNCATE_LEN 15 /* number of bytes to keep for member name */
@ -557,6 +557,7 @@ write_cleanup(struct bsdar *bsdar)
free(bsdar->s_sn);
bsdar->as = NULL;
bsdar->s_so = NULL;
bsdar->s_so_max = 0;
bsdar->s_sn = NULL;
}
@ -613,7 +614,9 @@ write_objs(struct bsdar *bsdar)
struct archive_entry *entry;
size_t s_sz; /* size of archive symbol table. */
size_t pm_sz; /* size of pseudo members */
int i, nr;
size_t w_sz; /* size of words in symbol table */
uint64_t nr;
int i;
if (elf_version(EV_CURRENT) == EV_NONE)
bsdar_errc(bsdar, EX_SOFTWARE, 0,
@ -628,9 +631,6 @@ write_objs(struct bsdar *bsdar)
if (strlen(obj->name) > _MAXNAMELEN_SVR4)
add_to_ar_str_table(bsdar, obj->name);
bsdar->rela_off += _ARHDR_LEN + obj->size + obj->size % 2;
if (bsdar->rela_off > UINT32_MAX)
bsdar_errc(bsdar, EX_SOFTWARE, 0,
"Symbol table offset overflow");
}
/*
@ -657,17 +657,30 @@ write_objs(struct bsdar *bsdar)
* absolute_offset = htobe32(relative_offset + size_of_pseudo_members)
*/
w_sz = sizeof(uint32_t);
if (bsdar->s_so_max > UINT32_MAX)
w_sz = sizeof(uint64_t);
if (bsdar->s_cnt != 0) {
s_sz = (bsdar->s_cnt + 1) * sizeof(uint32_t) + bsdar->s_sn_sz;
pm_sz = _ARMAG_LEN + (_ARHDR_LEN + s_sz);
if (bsdar->as != NULL)
pm_sz += _ARHDR_LEN + bsdar->as_sz;
/* Use the 64-bit word size format if necessary. */
if (bsdar->s_so_max > UINT32_MAX - pm_sz) {
w_sz = sizeof(uint64_t);
pm_sz -= s_sz;
s_sz = (bsdar->s_cnt + 1) * sizeof(uint64_t) +
bsdar->s_sn_sz;
pm_sz += s_sz;
}
for (i = 0; (size_t)i < bsdar->s_cnt; i++) {
if (*(bsdar->s_so + i) > UINT32_MAX - pm_sz)
bsdar_errc(bsdar, EX_SOFTWARE, 0,
"Symbol table offset overflow");
*(bsdar->s_so + i) = htobe32(*(bsdar->s_so + i) +
pm_sz);
if (w_sz == sizeof(uint32_t))
*(bsdar->s_so + i) =
htobe32((uint32_t)(*(bsdar->s_so + i)) + pm_sz);
else
*(bsdar->s_so + i) =
htobe64(*(bsdar->s_so + i) + pm_sz);
}
}
@ -689,16 +702,28 @@ write_objs(struct bsdar *bsdar)
if (entry == NULL)
bsdar_errc(bsdar, EX_SOFTWARE, 0,
"archive_entry_new failed");
archive_entry_copy_pathname(entry, "/");
if (w_sz == sizeof(uint64_t))
archive_entry_copy_pathname(entry, "/SYM64/");
else
archive_entry_copy_pathname(entry, "/");
if ((bsdar->options & AR_D) == 0)
archive_entry_set_mtime(entry, time(NULL), 0);
archive_entry_set_size(entry, (bsdar->s_cnt + 1) *
sizeof(uint32_t) + bsdar->s_sn_sz);
archive_entry_set_size(entry, (bsdar->s_cnt + 1) * w_sz +
bsdar->s_sn_sz);
AC(archive_write_header(a, entry));
nr = htobe32(bsdar->s_cnt);
write_data(bsdar, a, &nr, sizeof(uint32_t));
write_data(bsdar, a, bsdar->s_so, sizeof(uint32_t) *
bsdar->s_cnt);
if (w_sz == sizeof(uint32_t))
nr = (uint64_t)htobe32((uint32_t)bsdar->s_cnt);
else
nr = htobe64(bsdar->s_cnt);
write_data(bsdar, a, &nr, w_sz);
if (w_sz == sizeof(uint64_t))
write_data(bsdar, a, bsdar->s_so, sizeof(uint64_t) *
bsdar->s_cnt);
else
for (i = 0; (size_t)i < bsdar->s_cnt; i++)
write_data(bsdar, a,
(uint32_t *)&bsdar->s_so[i],
sizeof(uint32_t));
write_data(bsdar, a, bsdar->s_sn, bsdar->s_sn_sz);
archive_entry_free(entry);
}
@ -904,13 +929,15 @@ add_to_ar_sym_table(struct bsdar *bsdar, const char *name)
bsdar->s_sn_sz = 0;
}
if (bsdar->s_cnt * sizeof(uint32_t) >= bsdar->s_so_cap) {
if (bsdar->s_cnt * sizeof(uint64_t) >= bsdar->s_so_cap) {
bsdar->s_so_cap *= 2;
bsdar->s_so = realloc(bsdar->s_so, bsdar->s_so_cap);
if (bsdar->s_so == NULL)
bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed");
}
bsdar->s_so[bsdar->s_cnt] = bsdar->rela_off;
if ((uint64_t)bsdar->rela_off > bsdar->s_so_max)
bsdar->s_so_max = (uint64_t)bsdar->rela_off;
bsdar->s_cnt++;
/*