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Displaying the full library filename when found

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This commit is contained in:
Pierre Pronchery 2011-07-10 00:15:42 +00:00
parent d27ce2e9bd
commit 81dfb821b0
1 changed files with 48 additions and 4 deletions
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52
tools/elf.c
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@ -1,5 +1,5 @@
/* $Id$ */ /* $Id$ */
/* Copyright (c) 2010 Pierre Pronchery <khorben@defora.org> */ /* Copyright (c) 2011 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS System Loader */ /* This file is part of DeforaOS System Loader */
/* This program is free software: you can redistribute it and/or modify /* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by * it under the terms of the GNU General Public License as published by
@ -15,6 +15,9 @@
#include <sys/stat.h>
/* macros */ /* macros */
# undef ELFFUNC # undef ELFFUNC
# undef ELFTYPE # undef ELFTYPE
@ -40,6 +43,7 @@ static int ELFFUNC(phdr)(char const * filename, FILE * fp, ELFTYPE(Ehdr) * ehdr,
ELFTYPE(Phdr) * phdr); ELFTYPE(Phdr) * phdr);
static int ELFFUNC(phdr_dyn)(char const * filename, FILE * fp, static int ELFFUNC(phdr_dyn)(char const * filename, FILE * fp,
ELFTYPE(Ehdr) * ehdr, ELFTYPE(Phdr) * phdr, ELFTYPE(Dyn) * dyn); ELFTYPE(Ehdr) * ehdr, ELFTYPE(Phdr) * phdr, ELFTYPE(Dyn) * dyn);
static void ELFFUNC(phdr_dyn_print)(char const * filename, char const * rpath);
static char * ELFFUNC(string)(char const * filename, FILE * fp, static char * ELFFUNC(string)(char const * filename, FILE * fp,
ELFTYPE(Ehdr) * ehdr, ELFTYPE(Addr) addr, ELFTYPE(Addr) index); ELFTYPE(Ehdr) * ehdr, ELFTYPE(Addr) addr, ELFTYPE(Addr) index);
@ -114,6 +118,7 @@ static int ELFFUNC(phdr_dyn)(char const * filename, FILE * fp,
ssize_t r = -1; ssize_t r = -1;
size_t i; size_t i;
char * p; char * p;
char * rpath = NULL;
for(i = 0; (i + 1) * sizeof(*dyn) < phdr->p_filesz; i++) for(i = 0; (i + 1) * sizeof(*dyn) < phdr->p_filesz; i++)
{ {
@ -126,8 +131,12 @@ static int ELFFUNC(phdr_dyn)(char const * filename, FILE * fp,
} }
if(s < 0) if(s < 0)
return -_error(filename, "Missing string section", 1); return -_error(filename, "Missing string section", 1);
if(s >= 0 && r >= 0)
rpath = ELFFUNC(string)(filename, fp, ehdr, dyn[s].d_un.d_val,
dyn[r].d_un.d_val);
#ifdef DEBUG #ifdef DEBUG
fprintf(stderr, "DEBUG: %s() strtab=%ld\n", __func__, s); fprintf(stderr, "DEBUG: %s() strtab=%ld rpath=%ld \"%s\"\n", __func__,
dyn[s].d_un.d_val, dyn[r].d_un.d_val, rpath);
#endif #endif
for(i = 0; (i + 1) * sizeof(*dyn) < phdr->p_filesz; i++) for(i = 0; (i + 1) * sizeof(*dyn) < phdr->p_filesz; i++)
{ {
@ -138,13 +147,48 @@ static int ELFFUNC(phdr_dyn)(char const * filename, FILE * fp,
if((p = ELFFUNC(string)(filename, fp, ehdr, dyn[s].d_un.d_ptr, if((p = ELFFUNC(string)(filename, fp, ehdr, dyn[s].d_un.d_ptr,
dyn[i].d_un.d_val)) == NULL) dyn[i].d_un.d_val)) == NULL)
continue; continue;
printf("\t%s\n", p); ELFFUNC(phdr_dyn_print)(p, rpath);
/* FIXME display the full filename and address */
free(p); free(p);
} }
return 0; return 0;
} }
static void ELFFUNC(phdr_dyn_print)(char const * filename, char const * rpath)
{
size_t len = strlen(filename);
size_t i;
char * p;
struct stat st;
int res;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(\"%s\", \"%s\")\n", __func__, filename,
rpath);
#endif
if(rpath != NULL)
for(i = 0;;)
{
if(rpath[i] != ':' && rpath[i] != '\0')
{
i++;
continue;
}
p = malloc(i + len + 2);
snprintf(p, i + 1, "%s", rpath);
snprintf(&p[i], len, "/%s", filename);
if((res = stat(p, &st)) == 0)
printf("\t%s => %s\n", filename, p);
free(p);
if(res == 0)
return;
if(rpath[i] == '\0')
break;
rpath += i + 1;
i = 0;
}
printf("\t%s\n", filename);
}
static char * ELFFUNC(string)(char const * filename, FILE * fp, static char * ELFFUNC(string)(char const * filename, FILE * fp,
ELFTYPE(Ehdr) * ehdr, ELFTYPE(Addr) addr, ELFTYPE(Addr) index) ELFTYPE(Ehdr) * ehdr, ELFTYPE(Addr) addr, ELFTYPE(Addr) index)
{ {