Differential D23571 Diff 69723 head/contrib/elftoolchain/elfcopy/sections.c

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head/contrib/elftoolchain/elfcopy/sections.c

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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.		* SUCH DAMAGE.
*/		*/

#include <sys/param.h>		#include <sys/param.h>
#include <sys/stat.h>		#include <sys/stat.h>
#include <err.h>		#include <err.h>
#include <libgen.h>		#include <libgen.h>
		#include <stdbool.h>
#include <stdio.h>		#include <stdio.h>
#include <stdlib.h>		#include <stdlib.h>
#include <string.h>		#include <string.h>

#include "elfcopy.h"		#include "elfcopy.h"

ELFTC_VCSID("$Id: sections.c 3758 2019-06-28 01:16:50Z emaste $");		ELFTC_VCSID("$Id: sections.c 3758 2019-06-28 01:16:50Z emaste $");

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{		{
struct section *s;		struct section *s;
const char *name;		const char *name;
Elf_Scn *is;		Elf_Scn *is;
GElf_Shdr ish;		GElf_Shdr ish;
size_t indx;		size_t indx;
uint64_t oldndx, newndx;		uint64_t oldndx, newndx;
int elferr, sec_flags, reorder;		int elferr, sec_flags, reorder;
		bool sections_added;

/*		/*
* Insert a pseudo section that contains the ELF header		* Insert a pseudo section that contains the ELF header
* and program header. Used as reference for section offset		* and program header. Used as reference for section offset
* or load address adjustment.		* or load address adjustment.
*/		*/
if ((s = calloc(1, sizeof(*s))) == NULL)		if ((s = calloc(1, sizeof(*s))) == NULL)
err(EXIT_FAILURE, "calloc failed");		err(EXIT_FAILURE, "calloc failed");
s->off = 0;		s->off = 0;
s->sz = gelf_fsize(ecp->eout, ELF_T_EHDR, 1, EV_CURRENT) +		s->sz = gelf_fsize(ecp->eout, ELF_T_EHDR, 1, EV_CURRENT) +
gelf_fsize(ecp->eout, ELF_T_PHDR, ecp->ophnum, EV_CURRENT);		gelf_fsize(ecp->eout, ELF_T_PHDR, ecp->ophnum, EV_CURRENT);
s->align = 1;		s->align = 1;
s->pseudo = 1;		s->pseudo = 1;
s->loadable = add_to_inseg_list(ecp, s);		s->loadable = add_to_inseg_list(ecp, s);
insert_to_sec_list(ecp, s, 0);		insert_to_sec_list(ecp, s, 0);

/* Create internal .shstrtab section. */		/* Create internal .shstrtab section. */
init_shstrtab(ecp);		init_shstrtab(ecp);

if (elf_getshstrndx(ecp->ein, &indx) == 0)		if (elf_getshstrndx(ecp->ein, &indx) == 0)
errx(EXIT_FAILURE, "elf_getshstrndx failed: %s",		errx(EXIT_FAILURE, "elf_getshstrndx failed: %s",
elf_errmsg(-1));		elf_errmsg(-1));

		sections_added = false;
reorder = 0;		reorder = 0;
is = NULL;		is = NULL;
while ((is = elf_nextscn(ecp->ein, is)) != NULL) {		while ((is = elf_nextscn(ecp->ein, is)) != NULL) {
if (gelf_getshdr(is, &ish) == NULL)		if (gelf_getshdr(is, &ish) == NULL)
errx(EXIT_FAILURE, "gelf_getshdr failed: %s",		errx(EXIT_FAILURE, "gelf_getshdr failed: %s",
elf_errmsg(-1));		elf_errmsg(-1));
if ((name = elf_strptr(ecp->ein, indx, ish.sh_name)) == NULL)		if ((name = elf_strptr(ecp->ein, indx, ish.sh_name)) == NULL)
errx(EXIT_FAILURE, "elf_strptr failed: %s",		errx(EXIT_FAILURE, "elf_strptr failed: %s",
▲ Show 20 Lines • Show All 58 Lines • ▼ Show 20 Lines	if (strcmp(name, ".shstrtab") != 0) {
/* Assuming .shstrtab is "unloadable". */		/* Assuming .shstrtab is "unloadable". */
s = ecp->shstrtab;		s = ecp->shstrtab;
s->off = ish.sh_offset;		s->off = ish.sh_offset;
}		}

oldndx = newndx = SHN_UNDEF;		oldndx = newndx = SHN_UNDEF;
if (strcmp(name, ".symtab") != 0 &&		if (strcmp(name, ".symtab") != 0 &&
strcmp(name, ".strtab") != 0) {		strcmp(name, ".strtab") != 0) {
		/* Add new sections before .shstrtab if we have one. */
if (!strcmp(name, ".shstrtab")) {		if (!strcmp(name, ".shstrtab")) {
/*		/*
* Add sections specified by --add-section and		* Add sections specified by --add-section and
* gnu debuglink. we want these sections have		* gnu debuglink. we want these sections have
* smaller index than .shstrtab section.		* smaller index than .shstrtab section.
*/		*/
		sections_added = true;
if (ecp->debuglink != NULL)		if (ecp->debuglink != NULL)
add_gnu_debuglink(ecp);		add_gnu_debuglink(ecp);
if (ecp->flags & SEC_ADD)		if (ecp->flags & SEC_ADD)
insert_sections(ecp);		insert_sections(ecp);
}		}
if ((s->os = elf_newscn(ecp->eout)) == NULL)		if ((s->os = elf_newscn(ecp->eout)) == NULL)
errx(EXIT_FAILURE, "elf_newscn failed: %s",		errx(EXIT_FAILURE, "elf_newscn failed: %s",
elf_errmsg(-1));		elf_errmsg(-1));
▲ Show 20 Lines • Show All 44 Lines • ▼ Show 20 Lines	while ((is = elf_nextscn(ecp->ein, is)) != NULL) {
if (strcmp(name, ".symtab") == 0) {		if (strcmp(name, ".symtab") == 0) {
ecp->flags \|= SYMTAB_EXIST;		ecp->flags \|= SYMTAB_EXIST;
ecp->symtab = s;		ecp->symtab = s;
}		}
if (strcmp(name, ".strtab") == 0)		if (strcmp(name, ".strtab") == 0)
ecp->strtab = s;		ecp->strtab = s;

insert_to_sec_list(ecp, s, 0);		insert_to_sec_list(ecp, s, 0);
		}
		if (!sections_added) {
		if (ecp->debuglink != NULL)
		add_gnu_debuglink(ecp);
		if (ecp->flags & SEC_ADD)
		insert_sections(ecp);
}		}
elferr = elf_errno();		elferr = elf_errno();
if (elferr != 0)		if (elferr != 0)
errx(EXIT_FAILURE, "elf_nextscn failed: %s",		errx(EXIT_FAILURE, "elf_nextscn failed: %s",
elf_errmsg(elferr));		elf_errmsg(elferr));
}		}

struct section *		struct section *
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