/*******************************************************************/
/* slibtool: a skinny libtool implementation, written in C */
/* Copyright (C) 2016--2024 SysDeer Technologies, LLC */
/* Released under the Standard MIT License; see COPYING.SLIBTOOL. */
/*******************************************************************/
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <slibtool/slibtool.h>
#include <slibtool/slibtool_arbits.h>
#include "slibtool_ar_impl.h"
#include "slibtool_driver_impl.h"
#include "slibtool_errinfo_impl.h"
/* decimal values in archive header are right padded with ascii spaces */
#define AR_DEC_PADDING (0x20)
/* archive file members are right padded as needed with ascii newline */
#define AR_OBJ_PADDING (0x0A)
/* initial number of elements in the transient, on-stack vector */
# define AR_STACK_VECTOR_ELEMENTS (0x200)
/* transient header info vector */
struct ar_header_info {
struct ar_raw_file_header * phdr;
uint32_t attr;
};
static const char ar_signature[] = AR_SIGNATURE;
static int slbt_free_archive_meta_impl(struct slbt_archive_meta_impl * meta, int ret)
{
if (meta) {
if (meta->armaps.armap_symrefs_32)
free(meta->armaps.armap_symrefs_32);
if (meta->armaps.armap_symrefs_64)
free(meta->armaps.armap_symrefs_64);
if (meta->hdrinfov)
free(meta->hdrinfov);
if (meta->namestrs)
free(meta->namestrs);
if (meta->memberv)
free(meta->memberv);
if (meta->offsetv)
free(meta->offsetv);
if (meta->members)
free(meta->members);
if (meta->symstrv)
free(meta->symstrv);
free(meta);
}
return ret;
}
static int slbt_ar_read_octal(const char * mark, int len, uint32_t * dec)
{
int i;
uint64_t res;
for (; len && (mark[len-1]==AR_DEC_PADDING); )
len--;
for (i=0,res=0; i<len; i++) {
if ((mark[i] >= '0') && (mark[i] <= '7')) {
res *= 8;
res += (mark[i] - '0');
} else {
return -1;
}
}
*dec = res;
return 0;
}
static int slbt_ar_read_decimal_64(const char * mark, int len, uint64_t * dec)
{
int i;
uint64_t res;
for (; len && (mark[len-1]==AR_DEC_PADDING); )
len--;
for (i=0,res=0; i<len; i++) {
if ((mark[i] >= '0') && (mark[i] <= '9')) {
res *= 10;
res += (mark[i] - '0');
} else {
return -1;
}
}
*dec = res;
return 0;
}
static int slbt_ar_read_decimal_32(const char * mark, int len, uint32_t * dec)
{
uint64_t res;
if (slbt_ar_read_decimal_64(mark,len,&res) < 0)
return -1;
*dec = res;
return 0;
}
static uint32_t slbt_ar_get_member_attr(struct ar_meta_member_info * m)
{
const char * hdrname;
uint32_t hdrattr;
const char * data;
const char * data_cap;
const unsigned char * udata;
unsigned char uch;
const size_t siglen = sizeof(struct ar_raw_signature);
hdrname = m->ar_file_header.ar_member_name;
hdrattr = m->ar_file_header.ar_header_attr;
data = m->ar_object_data;
data_cap = &data[m->ar_file_header.ar_file_size];
if (hdrattr & AR_HEADER_ATTR_SYSV) {
/* long names member? */
if ((hdrname[0] == '/') && (hdrname[1] == '/'))
return AR_MEMBER_ATTR_NAMESTRS;
/* mips 64-bit armap member? */
else if (!strncmp(hdrname,"/SYM64/",7))
return AR_MEMBER_ATTR_ARMAP;
/* armap member? */
else if (hdrname[0] == '/' && (hdrname[1] == '\0'))
return AR_MEMBER_ATTR_ARMAP;
/* nested archive? */
else if (m->ar_file_header.ar_file_size >= siglen)
if (!strncmp(data,ar_signature,siglen))
return AR_MEMBER_ATTR_ARCHIVE;
} else if (hdrattr & AR_HEADER_ATTR_BSD) {
if (!strcmp(hdrname,"__.SYMDEF"))
return AR_MEMBER_ATTR_ARMAP;
else if (!strcmp(hdrname,"__.SYMDEF SORTED"))
return AR_MEMBER_ATTR_ARMAP;
else if (!strcmp(hdrname,"__.SYMDEF_64"))
return AR_MEMBER_ATTR_ARMAP;
else if (!strcmp(hdrname,"__.SYMDEF_64 SORTED"))
return AR_MEMBER_ATTR_ARMAP;
}
/* ascii only data? */
for (; data<data_cap; ) {
if ((uch = *data) >= 0x80)
break;
data++;
}
if (data == data_cap)
return AR_MEMBER_ATTR_ASCII;
data = m->ar_object_data;
udata = (unsigned char *)data;
/* elf object? [quick and dirty] */
if (m->ar_file_header.ar_file_size >= 5)
if ((udata[0] == 0x7f)
&& (udata[1] == 'E')
&& (udata[2] == 'L')
&& (udata[3] == 'F'))
if ((m->ar_object_attr = AR_OBJECT_ATTR_ELF))
return AR_MEMBER_ATTR_OBJECT;
/* coff i386 object? [quick and dirty] */
if (m->ar_file_header.ar_file_size >= 2)
if ((udata[0] == 0x4c) && (udata[1] == 0x01))
if ((m->ar_object_attr = AR_OBJECT_ATTR_COFF))
return AR_MEMBER_ATTR_OBJECT;
/* coff x86_64 object? [quick and dirty] */
if (m->ar_file_header.ar_file_size >= 2)
if ((udata[0] == 0x64) && (udata[1] == 0x86))
if ((m->ar_object_attr = AR_OBJECT_ATTR_COFF))
return AR_MEMBER_ATTR_OBJECT;
/* big endian 32-bit macho object? [quick and dirty] */
if (m->ar_file_header.ar_file_size >= 4)
if ((udata[0] == 0xfe) && (udata[1] == 0xed))
if ((udata[2] == 0xfa) && (udata[3] == 0xce))
if ((m->ar_object_attr = AR_OBJECT_ATTR_MACHO))
return AR_MEMBER_ATTR_OBJECT;
/* big endian 64-bit macho object? [quick and dirty] */
if (m->ar_file_header.ar_file_size >= 4)
if ((udata[0] == 0xfe) && (udata[1] == 0xed))
if ((udata[2] == 0xfa) && (udata[3] == 0xcf))
if ((m->ar_object_attr = AR_OBJECT_ATTR_MACHO))
return AR_MEMBER_ATTR_OBJECT;
/* little endian 32-bit macho object? [quick and dirty] */
if (m->ar_file_header.ar_file_size >= 4)
if ((udata[3] == 0xfe) && (udata[2] == 0xed))
if ((udata[1] == 0xfa) && (udata[0] == 0xce))
if ((m->ar_object_attr = AR_OBJECT_ATTR_MACHO))
return AR_MEMBER_ATTR_OBJECT;
/* little endian 64-bit macho object? [quick and dirty] */
if (m->ar_file_header.ar_file_size >= 4)
if ((udata[3] == 0xfe) && (udata[2] == 0xed))
if ((udata[1] == 0xfa) && (udata[0] == 0xcf))
if ((m->ar_object_attr = AR_OBJECT_ATTR_MACHO))
return AR_MEMBER_ATTR_OBJECT;
/* all other */
return AR_MEMBER_ATTR_DEFAULT;
}
static int slbt_ar_parse_primary_armap_bsd_32(
const struct slbt_driver_ctx * dctx,
struct slbt_archive_meta_impl * m)
{
struct ar_raw_armap_bsd_32 * armap;
struct ar_meta_member_info * memberp;
struct ar_meta_armap_common_32 *armapref;
uint32_t attr;
uint32_t nsyms;
uint32_t nstrs;
uint32_t sizeofrefs_le;
uint32_t sizeofrefs_be;
uint32_t sizeofrefs;
uint32_t sizeofstrs;
const char * ch;
const char * cap;
unsigned char * uch;
unsigned char (*mark)[0x04];
armap = &m->armaps.armap_bsd_32;
memberp = m->memberv[0];
mark = memberp->ar_object_data;
armap->ar_size_of_refs = mark;
uch = *mark++;
armap->ar_first_name_offset = mark;
sizeofrefs_le = (uch[3] << 24) + (uch[2] << 16) + (uch[1] << 8) + uch[0];
sizeofrefs_be = (uch[0] << 24) + (uch[1] << 16) + (uch[2] << 8) + uch[3];
if (sizeofrefs_le < memberp->ar_object_size - sizeof(*mark)) {
sizeofrefs = sizeofrefs_le;
attr = AR_ARMAP_ATTR_LE_32;
} else if (sizeofrefs_be < memberp->ar_object_size - sizeof(*mark)) {
sizeofrefs = sizeofrefs_be;
attr = AR_ARMAP_ATTR_BE_32;
} else {
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_SIZE_OF_REFS);
}
nsyms = sizeofrefs / sizeof(struct ar_raw_armap_ref_32);
mark += (sizeofrefs / sizeof(*mark));
armap->ar_size_of_strs = mark;
uch = *mark++;
sizeofstrs = (attr == AR_ARMAP_ATTR_LE_32)
? (uch[3] << 24) + (uch[2] << 16) + (uch[1] << 8) + uch[0]
: (uch[0] << 24) + (uch[1] << 16) + (uch[2] << 8) + uch[3];
if (sizeofstrs > memberp->ar_object_size - 2*sizeof(*mark) - sizeofrefs)
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_SIZE_OF_STRS);
m->symstrs = (const char *)mark;
cap = memberp->ar_object_data;
cap += memberp->ar_object_size;
if ((cap == m->symstrs) && nsyms)
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (nsyms && !m->symstrs[0])
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
for (ch=&m->symstrs[1],nstrs=0; ch<cap; ch++) {
if (!ch[0] && !ch[-1] && (nstrs < nsyms))
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (!ch[0] && ch[-1])
nstrs++;
}
if (nstrs != nsyms)
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (cap[-1])
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (!(m->symstrv = calloc(nsyms + 1,sizeof(const char *))))
return SLBT_SYSTEM_ERROR(dctx,0);
armap->ar_string_table = m->symstrv;
armapref = &m->armaps.armap_common_32;
armapref->ar_member = memberp;
armapref->ar_armap_bsd = armap;
armapref->ar_armap_attr = AR_ARMAP_ATTR_BSD | attr;
armapref->ar_num_of_symbols = nsyms;
armapref->ar_size_of_refs = sizeofrefs;
armapref->ar_size_of_strs = sizeofstrs;
armapref->ar_string_table = m->symstrs;
m->armaps.armap_nsyms = nsyms;
m->armeta.a_armap_primary.ar_armap_common_32 = armapref;
return 0;
}
static int slbt_ar_parse_primary_armap_bsd_64(
const struct slbt_driver_ctx * dctx,
struct slbt_archive_meta_impl * m)
{
struct ar_raw_armap_bsd_64 * armap;
struct ar_meta_member_info * memberp;
struct ar_meta_armap_common_64 *armapref;
uint32_t attr;
uint64_t u64_lo;
uint64_t u64_hi;
uint64_t nsyms;
uint64_t nstrs;
uint64_t sizeofrefs_le;
uint64_t sizeofrefs_be;
uint64_t sizeofrefs;
uint64_t sizeofstrs;
const char * ch;
const char * cap;
unsigned char * uch;
unsigned char (*mark)[0x08];
armap = &m->armaps.armap_bsd_64;
memberp = m->memberv[0];
mark = memberp->ar_object_data;
armap->ar_size_of_refs = mark;
uch = *mark++;
armap->ar_first_name_offset = mark;
u64_lo = (uch[3] << 24) + (uch[2] << 16) + (uch[1] << 8) + uch[0];
u64_hi = (uch[7] << 24) + (uch[6] << 16) + (uch[5] << 8) + uch[4];
sizeofrefs_le = u64_lo + (u64_hi << 32);
u64_hi = (uch[0] << 24) + (uch[1] << 16) + (uch[2] << 8) + uch[3];
u64_lo = (uch[4] << 24) + (uch[5] << 16) + (uch[6] << 8) + uch[7];
sizeofrefs_be = (u64_hi << 32) + u64_lo;
if (sizeofrefs_le < memberp->ar_object_size - sizeof(*mark)) {
sizeofrefs = sizeofrefs_le;
attr = AR_ARMAP_ATTR_LE_64;
} else if (sizeofrefs_be < memberp->ar_object_size - sizeof(*mark)) {
sizeofrefs = sizeofrefs_be;
attr = AR_ARMAP_ATTR_BE_64;
} else {
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_SIZE_OF_REFS);
}
nsyms = sizeofrefs / sizeof(struct ar_raw_armap_ref_64);
mark += (sizeofrefs / sizeof(*mark));
armap->ar_size_of_strs = mark;
uch = *mark++;
if (attr == AR_ARMAP_ATTR_LE_64) {
u64_lo = (uch[3] << 24) + (uch[2] << 16) + (uch[1] << 8) + uch[0];
u64_hi = (uch[7] << 24) + (uch[6] << 16) + (uch[5] << 8) + uch[4];
} else {
u64_hi = (uch[0] << 24) + (uch[1] << 16) + (uch[2] << 8) + uch[3];
u64_lo = (uch[4] << 24) + (uch[5] << 16) + (uch[6] << 8) + uch[7];
}
sizeofstrs = u64_lo + (u64_hi << 32);
m->symstrs = (const char *)mark;
cap = memberp->ar_object_data;
cap += memberp->ar_object_size;
if ((cap == m->symstrs) && nsyms)
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (nsyms && !m->symstrs[0])
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
for (ch=&m->symstrs[1],nstrs=0; ch<cap; ch++) {
if (!ch[0] && !ch[-1] && (nstrs < nsyms))
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (!ch[0] && ch[-1])
nstrs++;
}
if (nstrs != nsyms)
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (cap[-1])
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (!(m->symstrv = calloc(nsyms + 1,sizeof(const char *))))
return SLBT_SYSTEM_ERROR(dctx,0);
armap->ar_string_table = m->symstrv;
armapref = &m->armaps.armap_common_64;
armapref->ar_member = memberp;
armapref->ar_armap_bsd = armap;
armapref->ar_armap_attr = AR_ARMAP_ATTR_BSD | attr;
armapref->ar_num_of_symbols = nsyms;
armapref->ar_size_of_refs = sizeofrefs;
armapref->ar_size_of_strs = sizeofstrs;
armapref->ar_string_table = m->symstrs;
m->armaps.armap_nsyms = nsyms;
m->armeta.a_armap_primary.ar_armap_common_64 = armapref;
return 0;
}
static int slbt_ar_parse_primary_armap_sysv_32(
const struct slbt_driver_ctx * dctx,
struct slbt_archive_meta_impl * m)
{
struct ar_raw_armap_sysv_32 * armap;
struct ar_meta_member_info * memberp;
struct ar_meta_armap_common_32 *armapref;
uint32_t nsyms;
uint32_t nstrs;
const char * ch;
const char * cap;
unsigned char * uch;
unsigned char (*mark)[0x04];
armap = &m->armaps.armap_sysv_32;
memberp = m->memberv[0];
mark = memberp->ar_object_data;
armap->ar_num_of_syms = mark;
uch = *mark++;
armap->ar_first_ref_offset = mark;
nsyms = (uch[0] << 24) + (uch[1] << 16) + (uch[2] << 8) + uch[3];
mark += nsyms;
if (memberp->ar_object_size < (sizeof(*mark) + (nsyms * sizeof(*mark))))
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_NUMBER_OF_SYMS);
m->symstrs = (const char *)mark;
cap = memberp->ar_object_data;
cap += memberp->ar_object_size;
if ((cap == m->symstrs) && nsyms)
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (nsyms && !m->symstrs[0])
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
for (ch=&m->symstrs[1],nstrs=0; ch<cap; ch++) {
if (!ch[0] && !ch[-1] && (nstrs < nsyms))
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (!ch[0] && ch[-1])
nstrs++;
}
if (nstrs != nsyms)
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (cap[-1])
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (!(m->symstrv = calloc(nsyms + 1,sizeof(const char *))))
return SLBT_SYSTEM_ERROR(dctx,0);
armap->ar_string_table = m->symstrv;
armapref = &m->armaps.armap_common_32;
armapref->ar_member = memberp;
armapref->ar_armap_sysv = armap;
armapref->ar_armap_attr = AR_ARMAP_ATTR_SYSV | AR_ARMAP_ATTR_BE_32;
armapref->ar_num_of_symbols = nsyms;
armapref->ar_string_table = m->symstrs;
m->armaps.armap_nsyms = nsyms;
m->armeta.a_armap_primary.ar_armap_common_32 = armapref;
return 0;
}
static int slbt_ar_parse_primary_armap_sysv_64(
const struct slbt_driver_ctx * dctx,
struct slbt_archive_meta_impl * m)
{
struct ar_raw_armap_sysv_64 * armap;
struct ar_meta_member_info * memberp;
struct ar_meta_armap_common_64 *armapref;
uint64_t nsyms_hi;
uint64_t nsyms_lo;
uint64_t nsyms;
uint64_t nstrs;
const char * ch;
const char * cap;
unsigned char * uch;
unsigned char (*mark)[0x08];
armap = &m->armaps.armap_sysv_64;
memberp = m->memberv[0];
mark = memberp->ar_object_data;
armap->ar_num_of_syms = mark;
uch = *mark++;
armap->ar_first_ref_offset = mark;
nsyms_hi = (uch[0] << 24) + (uch[1] << 16) + (uch[2] << 8) + uch[3];
nsyms_lo = (uch[4] << 24) + (uch[5] << 16) + (uch[6] << 8) + uch[7];
nsyms = (nsyms_hi << 32) + nsyms_lo;
mark += nsyms;
if (memberp->ar_object_size < (sizeof(*mark) + (nsyms * sizeof(*mark))))
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_NUMBER_OF_SYMS);
m->symstrs = (const char *)mark;
cap = memberp->ar_object_data;
cap += memberp->ar_object_size;
if ((cap == m->symstrs) && nsyms)
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (nsyms && !m->symstrs[0])
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
for (ch=&m->symstrs[1],nstrs=0; ch<cap; ch++) {
if (!ch[0] && !ch[-1] && (nstrs < nsyms))
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (!ch[0] && ch[-1])
nstrs++;
}
if (nstrs != nsyms)
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (cap[-1])
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE);
if (!(m->symstrv = calloc(nsyms + 1,sizeof(const char *))))
return SLBT_SYSTEM_ERROR(dctx,0);
armap->ar_string_table = m->symstrv;
armapref = &m->armaps.armap_common_64;
armapref->ar_member = memberp;
armapref->ar_armap_sysv = armap;
armapref->ar_armap_attr = AR_ARMAP_ATTR_SYSV | AR_ARMAP_ATTR_BE_64;
armapref->ar_num_of_symbols = nsyms;
armapref->ar_string_table = m->symstrs;
m->armaps.armap_nsyms = nsyms;
m->armeta.a_armap_primary.ar_armap_common_64 = armapref;
return 0;
}
static int slbt_ar_parse_primary_armap(
const struct slbt_driver_ctx * dctx,
struct slbt_archive_meta_impl * m)
{
struct ar_meta_member_info * memberp;
const char * hdrname;
uint32_t hdrattr;
memberp = m->memberv[0];
hdrname = memberp->ar_file_header.ar_member_name;
hdrattr = memberp->ar_file_header.ar_header_attr;
if (!(memberp->ar_member_attr & AR_MEMBER_ATTR_ARMAP))
return 0;
if (hdrattr & AR_HEADER_ATTR_SYSV) {
/* mips 64-bit armap member? */
if (!strncmp(hdrname,"/SYM64/",7))
return slbt_ar_parse_primary_armap_sysv_64(
dctx,m);
/* sysv 32-bit armap member */
return slbt_ar_parse_primary_armap_sysv_32(
dctx,m);
} else if (hdrattr & AR_HEADER_ATTR_BSD) {
if (!strcmp(hdrname,"__.SYMDEF"))
return slbt_ar_parse_primary_armap_bsd_32(
dctx,m);
else if (!strcmp(hdrname,"__.SYMDEF SORTED"))
return slbt_ar_parse_primary_armap_bsd_32(
dctx,m);
else if (!strcmp(hdrname,"__.SYMDEF_64"))
return slbt_ar_parse_primary_armap_bsd_64(
dctx,m);
else if (!strcmp(hdrname,"__.SYMDEF_64 SORTED"))
return slbt_ar_parse_primary_armap_bsd_64(
dctx,m);
}
return SLBT_CUSTOM_ERROR(dctx,SLBT_ERR_FLOW_ERROR);
}
struct ar_meta_member_info * slbt_archive_member_from_offset(
struct slbt_archive_meta_impl * meta,
off_t offset)
{
intptr_t l,r,m;
off_t * offsetv;
l = 0;
r = meta->nentries - 1;
offsetv = meta->offsetv;
while (l != r) {
m = (l + r) / 2;
m += (l + 2) % 2;
if (offsetv[m] > offset) {
r = --m;
} else {
l = m;
}
}
return (offsetv[l] == offset) ? meta->memberv[l] : 0;
}
int slbt_get_archive_meta(
const struct slbt_driver_ctx * dctx,
const struct slbt_raw_archive * archive,
struct slbt_archive_meta ** meta)
{
const char * mark;
const char * cap;
struct slbt_archive_meta_impl * m;
const char * slash;
const char * ch;
const char * fldcap;
size_t nelements;
uint64_t nentries;
uint64_t nmembers;
uint64_t stblsize;
uint64_t filesize;
uint64_t namelen;
uint64_t nameoff;
uint32_t attr;
void * s_addr;
void * m_addr;
const char * s_ptr;
const char * m_ptr;
struct ar_raw_file_header * arhdr;
struct ar_raw_file_header * arlongnames;
struct ar_meta_member_info * memberp;
char * longnamep;
size_t idx;
struct ar_header_info * hdrinfov;
struct ar_header_info * hdrinfov_cap;
struct ar_header_info * hdrinfov_next;
struct ar_header_info hdrinfobuf[AR_STACK_VECTOR_ELEMENTS];
/* init */
hdrinfov = hdrinfobuf;
hdrinfov_cap = &hdrinfobuf[AR_STACK_VECTOR_ELEMENTS];
nelements = AR_STACK_VECTOR_ELEMENTS;
memset(hdrinfobuf,0,sizeof(hdrinfobuf));
mark = archive->map_addr;
cap = &mark[archive->map_size];
/* preliminary validation */
if (archive->map_size < sizeof(struct ar_raw_signature))
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_SIGNATURE);
else if (strncmp(mark,ar_signature,sizeof(struct ar_raw_signature)))
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_SIGNATURE);
/* alloc */
if (!(m = calloc(1,sizeof(*m))))
return SLBT_SYSTEM_ERROR(dctx,0);
/* associated driver context */
m->dctx = dctx;
/* archive map info */
m->armeta.r_archive.map_addr = archive->map_addr;
m->armeta.r_archive.map_size = archive->map_size;
/* archive signature */
m->armeta.r_signature = (struct ar_raw_signature *)mark;
m->armeta.m_signature = (struct ar_meta_signature *)ar_signature;
/* signature only? */
if (archive->map_size == sizeof(struct ar_raw_signature)) {
*meta = &m->armeta;
return 0;
}
mark += sizeof(struct ar_raw_signature);
/* only trailing null characters past the signature? */
if (cap < &mark[sizeof(*arhdr)])
for (ch=mark; ch<cap; ch++)
if (*ch)
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_HEADER));
/* count entries, calculate string table size */
for (nentries=0,stblsize=0,arlongnames=0; mark<cap; nentries++) {
arhdr = (struct ar_raw_file_header *)mark;
/* file size */
if ((slbt_ar_read_decimal_64(
arhdr->ar_file_size,
sizeof(arhdr->ar_file_size),
&filesize)) < 0)
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_HEADER));
mark += sizeof(struct ar_raw_file_header);
/* stblsize, member name type */
fldcap = &arhdr->ar_file_id[sizeof(arhdr->ar_file_id)];
/* sysv long names table? */
if ((arhdr->ar_file_id[0] == '/') && (arhdr->ar_file_id[1] == '/')) {
for (ch=&arhdr->ar_file_id[2]; ch<fldcap; ch++)
if (*ch != AR_DEC_PADDING)
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_HEADER));
if (slbt_ar_read_decimal_64(
arhdr->ar_file_size,
sizeof(arhdr->ar_file_size),
&namelen) < 0)
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_HEADER));
/* duplicate long names member? */
if (arlongnames)
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_DUPLICATE_LONG_NAMES));
attr = AR_HEADER_ATTR_FILE_ID | AR_HEADER_ATTR_SYSV;
stblsize++;
stblsize++;
stblsize++;
stblsize += namelen;
arlongnames = arhdr;
/* the /SYM64/ string must be special cased, also below when it gets copied */
} else if (!strncmp(arhdr->ar_file_id,"/SYM64/",7)) {
for (ch=&arhdr->ar_file_id[7]; ch<fldcap; ch++)
if (*ch != AR_DEC_PADDING)
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_HEADER));
attr = AR_HEADER_ATTR_FILE_ID | AR_HEADER_ATTR_SYSV;
stblsize += 8;
/* sysv armap member or sysv long name reference? */
} else if (arhdr->ar_file_id[0] == '/') {
if (slbt_ar_read_decimal_64(
&arhdr->ar_file_id[1],
sizeof(arhdr->ar_file_id)-1,
&nameoff) < 0)
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_HEADER));
if (arhdr->ar_file_id[1] == AR_DEC_PADDING) {
attr = AR_HEADER_ATTR_FILE_ID | AR_HEADER_ATTR_SYSV;
stblsize++;
stblsize++;
} else {
attr = AR_HEADER_ATTR_NAME_REF | AR_HEADER_ATTR_SYSV;
}
/* bsd long name reference? */
} else if ((arhdr->ar_file_id[0] == '#')
&& (arhdr->ar_file_id[1] == '1')
&& (arhdr->ar_file_id[2] == '/')) {
if (slbt_ar_read_decimal_64(
&arhdr->ar_file_id[3],
sizeof(arhdr->ar_file_id)-3,
&namelen) < 0)
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_HEADER));
attr = AR_HEADER_ATTR_NAME_REF | AR_HEADER_ATTR_BSD;
stblsize += namelen + 1;
/* must be either a sysv short member name, or a (legacy) bsd short name */
} else {
for (ch=arhdr->ar_file_id,slash=0; (ch<fldcap) && !slash; ch++)
if (*ch == '/')
slash = ch;
if (slash) {
attr = AR_HEADER_ATTR_FILE_ID | AR_HEADER_ATTR_SYSV;
stblsize += (slash - arhdr->ar_file_id) + 1;
} else {
attr = AR_HEADER_ATTR_FILE_ID | AR_HEADER_ATTR_BSD;
stblsize += sizeof(arhdr->ar_file_id) + 1;
}
for (; ch<fldcap; )
if (*ch++ != AR_DEC_PADDING)
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_HEADER));
}
/* truncated data? */
if (cap < &mark[filesize])
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_TRUNCATED_DATA));
/* ar member alignment */
filesize += 1;
filesize |= 1;
filesize ^= 1;
mark += filesize;
/* only trailing null characters past the signature? */
if (cap < &mark[sizeof(*arhdr)])
for (; mark<cap; )
if (*mark++)
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_INVALID_HEADER));
/* transient header info vector */
if (&hdrinfov[nentries] == hdrinfov_cap) {
nelements = (nelements == AR_STACK_VECTOR_ELEMENTS)
? (nelements << 4) : (nelements << 1);
if (!(hdrinfov_next = calloc(nelements,sizeof(*hdrinfov))))
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_TRUNCATED_DATA));
for (idx=0; idx<nentries; idx++) {
hdrinfov_next[idx].phdr = hdrinfov[idx].phdr;
hdrinfov_next[idx].attr = hdrinfov[idx].attr;
};
if (hdrinfov != hdrinfobuf)
free(hdrinfov);
hdrinfov = hdrinfov_next;
hdrinfov_cap = &hdrinfov_next[nelements];
m->hdrinfov = hdrinfov;
}
hdrinfov[nentries].phdr = arhdr;
hdrinfov[nentries].attr = attr;
}
/* allocate name strings, member vector */
if (!(m->namestrs = calloc(1,stblsize)))
return slbt_free_archive_meta_impl(
m,SLBT_SYSTEM_ERROR(dctx,0));
if (!(m->offsetv = calloc(nentries+1,sizeof(*m->offsetv))))
return slbt_free_archive_meta_impl(
m,SLBT_SYSTEM_ERROR(dctx,0));
if (!(m->memberv = calloc(nentries+1,sizeof(*m->memberv))))
return slbt_free_archive_meta_impl(
m,SLBT_SYSTEM_ERROR(dctx,0));
if (!(m->members = calloc(nentries,sizeof(*m->members))))
return slbt_free_archive_meta_impl(
m,SLBT_SYSTEM_ERROR(dctx,0));
/* archive signature reference */
s_addr = archive->map_addr;
s_ptr = s_addr;
/* iterate, store meta data in library-friendly form */
for (idx=0,longnamep=m->namestrs; idx<nentries; idx++) {
arhdr = hdrinfov[idx].phdr;
attr = hdrinfov[idx].attr;
m_addr = arhdr;
m_ptr = m_addr;
memberp = &m->members[idx];
m->offsetv[idx] = m_ptr - s_ptr;
m->memberv[idx] = memberp;
memberp->ar_file_header.ar_header_attr = attr;
slbt_ar_read_decimal_64(
arhdr->ar_time_date_stamp,
sizeof(arhdr->ar_time_date_stamp),
&memberp->ar_file_header.ar_time_date_stamp);
slbt_ar_read_decimal_32(
arhdr->ar_uid,
sizeof(arhdr->ar_uid),
&memberp->ar_file_header.ar_uid);
slbt_ar_read_decimal_32(
arhdr->ar_gid,
sizeof(arhdr->ar_gid),
&memberp->ar_file_header.ar_gid);
slbt_ar_read_octal(
arhdr->ar_file_mode,
sizeof(arhdr->ar_file_mode),
&memberp->ar_file_header.ar_file_mode);
slbt_ar_read_decimal_64(
arhdr->ar_file_size,
sizeof(arhdr->ar_file_size),
&memberp->ar_file_header.ar_file_size);
memberp->ar_file_header.ar_member_name = longnamep;
if (attr == (AR_HEADER_ATTR_FILE_ID | AR_HEADER_ATTR_SYSV)) {
if ((arhdr->ar_file_id[0] == '/') && (arhdr->ar_file_id[1] == '/')) {
*longnamep++ = '/';
*longnamep++ = '/';
longnamep++;
} else if ((arhdr->ar_file_id[0] == '/') && (arhdr->ar_file_id[1] == 'S')) {
*longnamep++ = '/';
*longnamep++ = 'S';
*longnamep++ = 'Y';
*longnamep++ = 'M';
*longnamep++ = '6';
*longnamep++ = '4';
*longnamep++ = '/';
longnamep++;
} else if (arhdr->ar_file_id[0] == '/') {
*longnamep++ = '/';
longnamep++;
} else {
ch = arhdr->ar_file_id;
for (; (*ch != '/'); )
*longnamep++ = *ch++;
longnamep++;
}
} else if (attr == (AR_HEADER_ATTR_FILE_ID | AR_HEADER_ATTR_BSD)) {
ch = arhdr->ar_file_id;
fldcap = &ch[sizeof(arhdr->ar_file_id)];
for (; (ch<fldcap) && (*ch != AR_DEC_PADDING); )
*longnamep++ = *ch++;
longnamep++;
} else if (attr == (AR_HEADER_ATTR_NAME_REF | AR_HEADER_ATTR_SYSV)) {
slbt_ar_read_decimal_64(
&arhdr->ar_file_id[1],
sizeof(arhdr->ar_file_id) - 1,
&nameoff);
ch = arlongnames->ar_file_id;
ch += sizeof(*arlongnames);
ch += nameoff;
for (; *ch && (*ch != '/') && (*ch != AR_OBJ_PADDING); )
*longnamep++ = *ch++;
longnamep++;
} else if (attr == (AR_HEADER_ATTR_NAME_REF | AR_HEADER_ATTR_BSD)) {
slbt_ar_read_decimal_64(
&arhdr->ar_file_id[3],
sizeof(arhdr->ar_file_id) - 3,
&namelen);
mark = arhdr->ar_file_id;
mark += sizeof(*arhdr);
memcpy(longnamep,mark,namelen);
longnamep += namelen;
longnamep++;
}
/* member raw header, object size, object data */
mark = arhdr->ar_file_id;
mark += sizeof(*arhdr);
namelen = 0;
if (attr == (AR_HEADER_ATTR_NAME_REF | AR_HEADER_ATTR_BSD)) {
slbt_ar_read_decimal_64(
&arhdr->ar_file_id[3],
sizeof(arhdr->ar_file_id)-3,
&namelen);
namelen += 1;
namelen |= 1;
namelen ^= 1;
mark += namelen;
};
memberp->ar_member_data = arhdr;
memberp->ar_object_data = (void *)mark;
memberp->ar_object_size = memberp->ar_file_header.ar_file_size - namelen;
/* member attribute */
memberp->ar_member_attr = slbt_ar_get_member_attr(memberp);
/* pe/coff second linker member? */
if ((idx == 1) && (memberp->ar_member_attr == AR_MEMBER_ATTR_ARMAP))
if (hdrinfov[0].attr & AR_HEADER_ATTR_SYSV)
if (m->members[0].ar_member_attr == AR_MEMBER_ATTR_ARMAP)
if (attr & AR_HEADER_ATTR_SYSV)
memberp->ar_member_attr = AR_MEMBER_ATTR_LINKINFO;
/* armap member must be the first */
if ((memberp->ar_member_attr == AR_MEMBER_ATTR_ARMAP) && (idx > 0)) {
if (m->members[0].ar_member_attr == AR_MEMBER_ATTR_ARMAP)
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_DUPLICATE_ARMAP_MEMBER));
return slbt_free_archive_meta_impl(
m,SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_MISPLACED_ARMAP_MEMBER));
}
}
/* primary armap (first linker member) */
if (slbt_ar_parse_primary_armap(dctx,m) < 0)
return slbt_free_archive_meta_impl(
m,SLBT_NESTED_ERROR(dctx));
for (idx=0,ch=m->symstrs; idx<m->armaps.armap_nsyms; idx++) {
m->symstrv[idx] = ch;
ch += strlen(ch);
ch++;
}
/* number of public archive members */
for (idx=0,nmembers=0; idx<nentries; idx++) {
switch (m->memberv[idx]->ar_member_attr) {
case AR_MEMBER_ATTR_ARMAP:
case AR_MEMBER_ATTR_LINKINFO:
case AR_MEMBER_ATTR_NAMESTRS:
break;
default:
nmembers++;
}
}
if (m->armaps.armap_common_32.ar_member)
m->armaps.armap_common_32.ar_num_of_members = nmembers;
if (m->armaps.armap_common_64.ar_member)
m->armaps.armap_common_64.ar_num_of_members = nmembers;
/* number of archive members, including internal ones */
m->nentries = nentries;
/* pe/coff armap attributes (second linker member) */
(void)m->armeta.a_armap_pecoff;
/* member vector */
m->armeta.a_memberv = m->memberv;
/* all done */
if (m->hdrinfov) {
free(m->hdrinfov);
m->hdrinfov = 0;
}
*meta = &m->armeta;
return 0;
}
void slbt_free_archive_meta(struct slbt_archive_meta * meta)
{
struct slbt_archive_meta_impl * m;
if (meta) {
m = slbt_archive_meta_ictx(meta);
slbt_free_archive_meta_impl(m,0);
}
}