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/*******************************************************************/
/* 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 <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#include <limits.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include <inttypes.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <slibtool/slibtool.h>
#include "slibtool_ar_impl.h"
#include "slibtool_driver_impl.h"
#include "slibtool_dprintf_impl.h"
#include "slibtool_snprintf_impl.h"
#include "slibtool_errinfo_impl.h"
static const char ar_symbol_type_A[] = "A";
static const char ar_symbol_type_B[] = "B";
static const char ar_symbol_type_C[] = "C";
static const char ar_symbol_type_D[] = "D";
static const char ar_symbol_type_G[] = "G";
static const char ar_symbol_type_I[] = "I";
static const char ar_symbol_type_R[] = "R";
static const char ar_symbol_type_S[] = "S";
static const char ar_symbol_type_T[] = "T";
static const char ar_symbol_type_W[] = "W";
static const char * const ar_symbol_type['Z'-'A'] = {
['A'-'A'] = ar_symbol_type_A,
['B'-'A'] = ar_symbol_type_B,
['C'-'A'] = ar_symbol_type_C,
['D'-'A'] = ar_symbol_type_D,
['G'-'A'] = ar_symbol_type_G,
['I'-'A'] = ar_symbol_type_I,
['R'-'A'] = ar_symbol_type_R,
['S'-'A'] = ar_symbol_type_S,
['T'-'A'] = ar_symbol_type_T,
['W'-'A'] = ar_symbol_type_W,
};
static void slbt_ar_update_syminfo_child(
char * program,
char * arname,
int fdout)
{
char * argv[6];
argv[0] = program;
argv[1] = "-P";
argv[2] = "-A";
argv[3] = "-g";
argv[4] = arname;
argv[5] = 0;
if (dup2(fdout,1) == 1)
execvp(program,argv);
_exit(EXIT_FAILURE);
}
static int slbt_obtain_nminfo(
struct slbt_archive_ctx_impl * ictx,
struct slbt_exec_ctx * ectx,
const struct slbt_driver_ctx * dctx,
struct slbt_archive_meta_impl * mctx)
{
int pos;
int fdcwd;
pid_t pid;
pid_t rpid;
int fdout;
char arname [PATH_MAX];
char output [PATH_MAX];
char program[PATH_MAX];
/* fdcwd */
fdcwd = slbt_driver_fdcwd(dctx);
/* program */
if (slbt_snprintf(program,sizeof(program),
"%s",dctx->cctx->host.nm) < 0)
return SLBT_BUFFER_ERROR(dctx);
/* output (.nm suffix, buf treat as .syminfo) */
pos = slbt_snprintf(
arname,sizeof(arname)-8,"%s",
ictx->path);
strcpy(output,arname);
strcpy(&output[pos],".nm");
/* fork */
fdout = openat(fdcwd,output,O_CREAT|O_TRUNC|O_WRONLY,0644);
if ((pid = fork()) < 0) {
close(fdout);
return SLBT_SYSTEM_ERROR(dctx,0);
}
/* child */
if (pid == 0)
slbt_ar_update_syminfo_child(
program,arname,fdout);
/* parent */
ectx->pid = pid;
rpid = waitpid(
pid,
&ectx->exitcode,
0);
if (rpid < 0) {
return SLBT_SYSTEM_ERROR(dctx,0);
} else if (ectx->exitcode < 0) {
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_FLOW_ERROR);
}
if (slbt_lib_get_txtfile_ctx(
dctx,output,
&mctx->nminfo) < 0)
return SLBT_NESTED_ERROR(dctx);
return 0;
}
static int slbt_get_symbol_nm_info(
struct slbt_archive_ctx * actx,
struct slbt_archive_meta_impl * mctx,
uint64_t idx)
{
int cint;
const char ** pline;
const char * mark;
const char * cap;
const char * objname;
const char * symname;
struct ar_meta_symbol_info * syminfo;
struct ar_meta_member_info ** pmember;
symname = mctx->symstrv[idx];
syminfo = &mctx->syminfo[idx];
for (pline=mctx->nminfo->txtlinev; *pline; pline++) {
mark = *pline;
if (!(mark = strchr(mark,']')))
return -1;
if ((*++mark != ':') || (*++mark != ' '))
return -1;
cap = ++mark;
for (; *cap && !isspace((cint = *cap)); )
cap++;
if (*cap != ' ')
return -1;
if (!(strncmp(symname,mark,cap-mark))) {
mark = ++cap;
/* space only according to posix, but ... */
if (mark[1] && (mark[1] != ' '))
return -1;
switch (mark[0]) {
case 'A':
case 'B':
case 'C':
case 'D':
case 'G':
case 'I':
case 'R':
case 'S':
case 'T':
case 'W':
syminfo->ar_symbol_type = ar_symbol_type[mark[0]-'A'];
break;
default:
break;
}
if (syminfo->ar_symbol_type) {
syminfo->ar_archive_name = *actx->path;
syminfo->ar_symbol_name = symname;
if (!(mark = strchr(*pline,'[')))
return -1;
if (!(cap = strchr(++mark,']')))
return -1;
}
pmember = mctx->memberv;
for (; *pmember && !syminfo->ar_object_name; ) {
objname = (*pmember)->ar_file_header.ar_member_name;
if (!(strncmp(objname,mark,cap-mark)))
syminfo->ar_object_name = objname;
pmember++;
}
mctx->syminfv[idx] = syminfo;
}
}
return (mctx->syminfv[idx] ? 0 : (-1));
}
slbt_hidden int slbt_ar_update_syminfo(
struct slbt_archive_ctx * actx,
struct slbt_exec_ctx * ectx)
{
const struct slbt_driver_ctx * dctx;
struct slbt_archive_ctx_impl * ictx;
struct slbt_archive_meta_impl * mctx;
uint64_t idx;
/* driver context, etc. */
ictx = slbt_get_archive_ictx(actx);
mctx = slbt_archive_meta_ictx(ictx->meta);
dctx = ictx->dctx;
/* nm -P -A -g */
if (slbt_obtain_nminfo(ictx,ectx,dctx,mctx) < 0)
return SLBT_NESTED_ERROR(dctx);
/* free old syminfo vector */
if (mctx->syminfv)
free(mctx->syminfv);
/* syminfo vector: armap symbols only */
if (!(mctx->syminfo = calloc(
mctx->armaps.armap_nsyms + 1,
sizeof(*mctx->syminfo))))
return SLBT_SYSTEM_ERROR(dctx,0);
if (!(mctx->syminfv = calloc(
mctx->armaps.armap_nsyms + 1,
sizeof(*mctx->syminfv))))
return SLBT_SYSTEM_ERROR(dctx,0);
/* do the thing */
for (idx=0; idx<mctx->armaps.armap_nsyms; idx++)
if (slbt_get_symbol_nm_info(actx,mctx,idx) < 0)
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_FLOW_ERROR);
/* yay */
return 0;
}
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