static void checkblock(void *bp)
{
REQUIRES (bp!=NULL);
REQUIRES ((size_t)(bp)%8 == 0);
if ((size_t)bp % 8)
printf("Error: %p is not doubleword aligned\n", bp);
if (GET(HDRP(GET_LOC(bp))) != GET(FTRP(GET_LOC(bp))))
printf("Error: header does not match footer\n");
}
static void *get_pred(void *bp)
{
REQUIRES (bp!=NULL);
REQUIRES ((size_t)(bp)%8 == 0);
bp = (void*)((char*)(bp) + WSIZE);
bp = GET_LOC(bp);
ENSURES ( (size_t)(bp)%8 == 0);
if ((long)bp == BASE)
return NULL;
else
return bp;
}
static void *get_succ(void *bp)
{
//printf ("root %p \n",(void*)root);
//printf ("getting successor of %p\n",bp);
REQUIRES (bp != NULL);
REQUIRES ((size_t)(bp)%8 == 0);
bp = GET_LOC(bp);
//printf("succ = %p \n ",bp);
if ( (long)bp == BASE)
return NULL;
else{
//rintf ("successor = %p",bp);
return (bp);
}
}
static int
build_file(Elf *src_elf, GElf_Ehdr *src_ehdr, Cmd_Info *cmd_info)
{
Elf_Scn *src_scn;
Elf_Scn *dst_scn;
int new_sh_name = 0; /* to hold the offset for the new */
/* section's name */
Elf *dst_elf = 0;
Elf_Data *elf_data;
Elf_Data *data;
int64_t scn_no, x;
size_t no_of_symbols = 0;
section_info_table *info;
unsigned int c = 0;
int fdtmp;
GElf_Shdr src_shdr;
GElf_Shdr dst_shdr;
GElf_Ehdr dst_ehdr;
GElf_Off new_offset = 0, r;
size_t shnum, shstrndx;
if (elf_getshnum(src_elf, &shnum) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
if (elf_getshstrndx(src_elf, &shstrndx) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
if ((fdtmp = open(elftmpfile, O_RDWR |
O_TRUNC | O_CREAT, (mode_t)0666)) == -1) {
error_message(OPEN_TEMP_ERROR,
SYSTEM_ERROR, strerror(errno),
prog, elftmpfile);
return (FAILURE);
}
if ((dst_elf = elf_begin(fdtmp, ELF_C_WRITE, (Elf *) 0)) == NULL) {
error_message(READ_ERROR,
LIBelf_ERROR, elf_errmsg(-1),
prog, elftmpfile);
(void) close(fdtmp);
return (FAILURE);
}
if (gelf_newehdr(dst_elf, gelf_getclass(src_elf)) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
/* initialize dst_ehdr */
(void) gelf_getehdr(dst_elf, &dst_ehdr);
dst_ehdr = *src_ehdr;
/*
* flush the changes to the ehdr so the
* ident array is filled in.
*/
(void) gelf_update_ehdr(dst_elf, &dst_ehdr);
if (src_ehdr->e_phnum != 0) {
(void) elf_flagelf(dst_elf, ELF_C_SET, ELF_F_LAYOUT);
if (gelf_newphdr(dst_elf, src_ehdr->e_phnum) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
for (x = 0; x < src_ehdr->e_phnum; ++x) {
GElf_Phdr dst;
GElf_Phdr src;
/* LINTED */
(void) gelf_getphdr(src_elf, (int)x, &src);
/* LINTED */
(void) gelf_getphdr(dst_elf, (int)x, &dst);
(void) memcpy(&dst, &src, sizeof (GElf_Phdr));
/* LINTED */
(void) gelf_update_phdr(dst_elf, (int)x, &dst);
}
x = location(dst_ehdr.e_phoff, 0, src_elf);
if (x == AFTER)
new_offset = (GElf_Off)src_ehdr->e_ehsize;
}
scn_no = 1;
while ((src_scn = sec_table[scn_no].scn) != (Elf_Scn *) -1) {
info = &sec_table[scn_no];
/* If section should be copied to new file NOW */
if ((info->secno != (GElf_Word)DELETED) &&
info->secno <= scn_no) {
if ((dst_scn = elf_newscn(dst_elf)) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
(void) gelf_getshdr(dst_scn, &dst_shdr);
(void) gelf_getshdr(info->scn, &src_shdr);
(void) memcpy(&dst_shdr, &src_shdr, sizeof (GElf_Shdr));
/*
* Update link and info fields
* The sh_link field may have special values so
* check them first.
*/
if ((src_shdr.sh_link >= shnum) ||
(src_shdr.sh_link == 0))
dst_shdr.sh_link = src_shdr.sh_link;
else if ((int)sec_table[src_shdr.sh_link].secno < 0)
dst_shdr.sh_link = 0;
else
dst_shdr.sh_link =
sec_table[src_shdr.sh_link].secno;
if ((src_shdr.sh_type == SHT_REL) ||
(src_shdr.sh_type == SHT_RELA)) {
if ((src_shdr.sh_info >= shnum) ||
((int)sec_table[src_shdr.
sh_info].secno < 0))
dst_shdr.sh_info = 0;
else
dst_shdr.sh_info =
sec_table[src_shdr.sh_info].secno;
}
data = sec_table[scn_no].data;
if ((elf_data = elf_newdata(dst_scn)) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
*elf_data = *data;
/* SHT_{DYNSYM, SYMTAB} might need some change */
if (((src_shdr.sh_type == SHT_SYMTAB) ||
(src_shdr.sh_type == SHT_DYNSYM)) &&
src_shdr.sh_entsize != 0 &&
(cmd_info->no_of_delete != 0 ||
cmd_info->no_of_nulled != 0)) {
char *new_sym;
no_of_symbols = src_shdr.sh_size /
src_shdr.sh_entsize;
new_sym = malloc(no_of_symbols *
src_shdr.sh_entsize);
if (new_sym == NULL) {
error_message(MALLOC_ERROR,
PLAIN_ERROR, (char *)0, prog);
mcs_exit(FAILURE);
}
/* CSTYLED */
elf_data->d_buf = (void *) new_sym;
for (c = 0; c < no_of_symbols; c++) {
GElf_Sym csym;
(void) gelf_getsym(data, c, &csym);
if ((csym.st_shndx < SHN_LORESERVE) &&
(csym.st_shndx != SHN_UNDEF)) {
section_info_table *i;
i = &sec_table[csym.st_shndx];
if (((int)i->secno !=
DELETED) &&
((int)i->secno != NULLED))
csym.st_shndx =
i->secno;
else {
if (src_shdr.sh_type ==
SHT_SYMTAB)
/*
* The section which
* this * symbol relates
* to is removed.
* There is no way to
* specify this fact,
* just change the shndx
* to 1.
*/
csym.st_shndx = 1;
else {
/*
* If this is in a
* .dynsym, NULL it out.
*/
csym.st_shndx = 0;
csym.st_name = 0;
csym.st_value = 0;
csym.st_size = 0;
csym.st_info = 0;
csym.st_other = 0;
csym.st_shndx = 0;
}
}
}
(void) gelf_update_sym(elf_data, c,
&csym);
}
}
/* update SHT_SYMTAB_SHNDX */
if ((src_shdr.sh_type == SHT_SYMTAB_SHNDX) &&
(src_shdr.sh_entsize != 0) &&
((cmd_info->no_of_delete != 0) ||
(cmd_info->no_of_nulled != 0))) {
GElf_Word *oldshndx;
GElf_Word *newshndx;
uint_t entcnt;
entcnt = src_shdr.sh_size /
src_shdr.sh_entsize;
oldshndx = data->d_buf;
newshndx = malloc(entcnt *
src_shdr.sh_entsize);
if (newshndx == NULL) {
error_message(MALLOC_ERROR,
PLAIN_ERROR, (char *)0, prog);
mcs_exit(FAILURE);
}
elf_data->d_buf = (void *)newshndx;
for (c = 0; c < entcnt; c++) {
if (oldshndx[c] != SHN_UNDEF) {
section_info_table *i;
i = &sec_table[oldshndx[c]];
if (((int)i->secno !=
DELETED) &&
((int)i->secno != NULLED))
newshndx[c] = i->secno;
else
newshndx[c] =
oldshndx[c];
} else
newshndx[c] =
oldshndx[c];
}
}
/*
* If the section is to be updated,
* do so.
*/
if (ISCANDIDATE(info->flags)) {
if ((GET_LOC(info->flags) == PRIOR) &&
(((int)info->secno == NULLED) ||
((int)info->secno == EXPANDED) ||
((int)info->secno == SHRUNK))) {
/*
* The section is updated,
* but the position is not too
* good. Need to NULL this out.
*/
dst_shdr.sh_name = 0;
dst_shdr.sh_type = SHT_PROGBITS;
if ((int)info->secno != NULLED) {
(cmd_info->no_of_moved)++;
SET_MOVING(info->flags);
}
} else {
/*
* The section is positioned AFTER,
* or there are no segments.
* It is safe to update this section.
*/
data = sec_table[scn_no].mdata;
*elf_data = *data;
dst_shdr.sh_size = elf_data->d_size;
}
}
/* add new section name to shstrtab? */
else if (!Sect_exists &&
(new_sec_string != NULL) &&
(scn_no == shstrndx) &&
(dst_shdr.sh_type == SHT_STRTAB) &&
((src_ehdr->e_phnum == 0) ||
((x = scn_location(dst_scn, dst_elf)) != IN) ||
(x != PRIOR))) {
size_t sect_len;
sect_len = strlen(SECT_NAME);
if ((elf_data->d_buf =
malloc((dst_shdr.sh_size +
sect_len + 1))) == NULL) {
error_message(MALLOC_ERROR,
PLAIN_ERROR, (char *)0, prog);
mcs_exit(FAILURE);
}
/* put original data plus new data in section */
(void) memcpy(elf_data->d_buf,
data->d_buf, data->d_size);
(void) memcpy(&((char *)elf_data->d_buf)
[data->d_size],
SECT_NAME,
sect_len + 1);
/* LINTED */
new_sh_name = (int)dst_shdr.sh_size;
dst_shdr.sh_size += sect_len + 1;
elf_data->d_size += sect_len + 1;
}
/*
* Compute offsets.
*/
if (src_ehdr->e_phnum != 0) {
/*
* Compute section offset.
*/
if (off_table[scn_no] == 0) {
if (dst_shdr.sh_addralign != 0) {
r = new_offset %
dst_shdr.sh_addralign;
if (r)
new_offset +=
dst_shdr.sh_addralign - r;
}
dst_shdr.sh_offset = new_offset;
elf_data->d_off = 0;
} else {
if (nobits_table[scn_no] == 0)
new_offset = off_table[scn_no];
}
if (nobits_table[scn_no] == 0)
new_offset += dst_shdr.sh_size;
}
}
(void) gelf_update_shdr(dst_scn, &dst_shdr); /* flush changes */
scn_no++;
}
/*
* This is the real new section.
*/
if (!Sect_exists && new_sec_string != NULL) {
size_t string_size;
string_size = strlen(new_sec_string) + 1;
if ((dst_scn = elf_newscn(dst_elf)) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
(void) gelf_getshdr(dst_scn, &dst_shdr);
dst_shdr.sh_name = new_sh_name;
dst_shdr.sh_type = SHT_PROGBITS;
dst_shdr.sh_flags = 0;
dst_shdr.sh_addr = 0;
if (src_ehdr->e_phnum != NULL)
dst_shdr.sh_offset = new_offset;
else
dst_shdr.sh_offset = 0;
dst_shdr.sh_size = string_size + 1;
dst_shdr.sh_link = 0;
dst_shdr.sh_info = 0;
dst_shdr.sh_addralign = 1;
dst_shdr.sh_entsize = 0;
(void) gelf_update_shdr(dst_scn, &dst_shdr); /* flush changes */
if ((elf_data = elf_newdata(dst_scn)) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
elf_data->d_size = string_size + 1;
if ((elf_data->d_buf = (char *)
calloc(1, string_size + 1)) == NULL) {
error_message(MALLOC_ERROR,
PLAIN_ERROR, (char *)0,
prog);
mcs_exit(FAILURE);
}
(void) memcpy(&((char *)elf_data->d_buf)[1],
new_sec_string, string_size);
elf_data->d_align = 1;
new_offset += string_size + 1;
}
/*
* If there are sections which needed to be moved,
* then do it here.
*/
if (cmd_info->no_of_moved != 0) {
int cnt;
info = &sec_table[0];
for (cnt = 0; cnt < shnum; cnt++, info++) {
if ((GET_MOVING(info->flags)) == 0)
continue;
if ((src_scn = elf_getscn(src_elf, info->osecno)) ==
NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
if (gelf_getshdr(src_scn, &src_shdr) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
if ((dst_scn = elf_newscn(dst_elf)) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
if (gelf_getshdr(dst_scn, &dst_shdr) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
dst_shdr = src_shdr;
data = info->mdata;
dst_shdr.sh_offset = new_offset; /* UPDATE fields */
dst_shdr.sh_size = data->d_size;
if ((shnum >= src_shdr.sh_link) ||
(src_shdr.sh_link == 0))
dst_shdr.sh_link = src_shdr.sh_link;
else
dst_shdr.sh_link =
sec_table[src_shdr.sh_link].osecno;
if ((shnum >= src_shdr.sh_info) ||
(src_shdr.sh_info == 0))
dst_shdr.sh_info = src_shdr.sh_info;
else
dst_shdr.sh_info =
sec_table[src_shdr.sh_info].osecno;
(void) gelf_update_shdr(dst_scn, &dst_shdr);
if ((elf_data = elf_newdata(dst_scn)) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
(void) memcpy(elf_data, data, sizeof (Elf_Data));
new_offset += data->d_size;
}
}
/*
* In the event that the position of the sting table has changed,
* as a result of deleted sections, update the ehdr->e_shstrndx.
*/
if ((shstrndx > 0) && (shnum > 0) &&
(sec_table[shstrndx].secno < shnum)) {
if (sec_table[shstrndx].secno < SHN_LORESERVE) {
dst_ehdr.e_shstrndx =
sec_table[dst_ehdr.e_shstrndx].secno;
} else {
Elf_Scn *_scn;
GElf_Shdr shdr0;
/*
* If shstrndx requires 'Extended ELF Sections'
* then it is stored in shdr[0].sh_link
*/
dst_ehdr.e_shstrndx = SHN_XINDEX;
if ((_scn = elf_getscn(dst_elf, 0)) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
(void) gelf_getshdr(_scn, &shdr0);
shdr0.sh_link = sec_table[shstrndx].secno;
(void) gelf_update_shdr(_scn, &shdr0);
}
}
if (src_ehdr->e_phnum != 0) {
size_t align = gelf_fsize(dst_elf, ELF_T_ADDR, 1, EV_CURRENT);
/* UPDATE location of program header table */
if (location(dst_ehdr.e_phoff, 0, dst_elf) == AFTER) {
r = new_offset % align;
if (r)
new_offset += align - r;
dst_ehdr.e_phoff = new_offset;
new_offset += dst_ehdr.e_phnum
* dst_ehdr.e_phentsize;
}
/* UPDATE location of section header table */
if ((location(dst_ehdr.e_shoff, 0, src_elf) == AFTER) ||
((location(dst_ehdr.e_shoff, 0, src_elf) == PRIOR) &&
(!Sect_exists && new_sec_string != NULL))) {
r = new_offset % align;
if (r)
new_offset += align - r;
dst_ehdr.e_shoff = new_offset;
}
free(b_e_seg_table);
/*
* The NOTE segment is the one segment whos
* sections might get moved by mcs processing.
* Make sure that the NOTE segments offset points
* to the .note section.
*/
if ((notesegndx != -1) && (notesctndx != -1) &&
(sec_table[notesctndx].secno)) {
Elf_Scn * notescn;
GElf_Shdr nshdr;
notescn = elf_getscn(dst_elf,
sec_table[notesctndx].secno);
(void) gelf_getshdr(notescn, &nshdr);
if (gelf_getclass(dst_elf) == ELFCLASS32) {
Elf32_Phdr * ph = elf32_getphdr(dst_elf) +
notesegndx;
/* LINTED */
ph->p_offset = (Elf32_Off)nshdr.sh_offset;
} else {
Elf64_Phdr * ph = elf64_getphdr(dst_elf) +
notesegndx;
ph->p_offset = (Elf64_Off)nshdr.sh_offset;
}
}
}
/* copy ehdr changes back into real ehdr */
(void) gelf_update_ehdr(dst_elf, &dst_ehdr);
if (elf_update(dst_elf, ELF_C_WRITE) < 0) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
(void) elf_end(dst_elf);
(void) close(fdtmp);
return (SUCCESS);
}
static int
traverse_file(Elf *elf, GElf_Ehdr * ehdr, char *cur_file, Cmd_Info *cmd_info)
{
Elf_Scn * scn;
Elf_Scn * temp_scn;
Elf_Data * data;
GElf_Shdr * shdr;
char *temp_name;
section_info_table * sinfo;
GElf_Xword x;
int ret = 0, SYM = 0; /* used by strip command */
int phnum = ehdr->e_phnum;
unsigned int i, scn_index;
size_t shstrndx, shnum;
Sect_exists = 0;
if (elf_getshnum(elf, &shnum) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
if (elf_getshstrndx(elf, &shstrndx) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
scn = 0;
scn_index = 1;
sinfo = &sec_table[scn_index];
while ((scn = elf_nextscn(elf, scn)) != 0) {
char *name;
shdr = &(sinfo->shdr);
if (gelf_getshdr(scn, shdr) == NULL) {
error_message(NO_SECT_TABLE_ERROR,
LIBelf_ERROR, elf_errmsg(-1),
prog, cur_file);
return (FAILURE);
} else {
name = elf_strptr(elf, shstrndx,
(size_t)shdr->sh_name);
if (name == NULL)
name = "_@@@###";
}
sinfo->scn = scn;
sinfo->secno = scn_index;
sinfo->osecno = scn_index;
SET_ACTION(sinfo->flags, ACT_NOP);
sinfo->name = name;
if (ehdr->e_phnum == 0)
SET_LOC(sinfo->flags, NOSEG);
else
SET_LOC(sinfo->flags, scn_location(scn, elf));
if (shdr->sh_type == SHT_GROUP) {
if (list_appendc(&cmd_info->sh_groups, sinfo) == 0) {
error_message(MALLOC_ERROR,
PLAIN_ERROR, (char *)0, prog);
mcs_exit(FAILURE);
}
}
/*
* If the target section is pointed by a section
* holding relocation infomation, then the
* pointing section would be useless if the
* target section is removed.
*/
if ((shdr->sh_type == SHT_REL ||
shdr->sh_type == SHT_RELA) &&
(shdr->sh_info != SHN_UNDEF &&
(temp_scn = elf_getscn(elf, shdr->sh_info)) != 0)) {
GElf_Shdr tmp_shdr;
if (gelf_getshdr(temp_scn, &tmp_shdr) != NULL) {
temp_name = elf_strptr(elf, shstrndx,
(size_t)tmp_shdr.sh_name);
sinfo->rel_name = temp_name;
sinfo->rel_scn_index =
shdr->sh_info;
if (phnum == 0)
sinfo->rel_loc = NOSEG;
else
sinfo->rel_loc =
scn_location(temp_scn, elf);
}
}
data = 0;
if ((data = elf_getdata(scn, data)) == NULL) {
error_message(LIBELF_ERROR,
LIBelf_ERROR, elf_errmsg(-1), prog);
return (FAILURE);
}
sinfo->data = data;
/*
* Check if this section is a candidate for
* action to be processes.
*/
if (sectcmp(name) == 0) {
SET_CANDIDATE(sinfo->flags);
/*
* This flag just shows that there was a
* candidate.
*/
Sect_exists++;
}
/*
* Any of the following section types should
* also be removed (if possible) if invoked via
* the 'strip' command.
*/
if (CHK_OPT(cmd_info, I_AM_STRIP) &&
((shdr->sh_type == SHT_SUNW_DEBUG) ||
(shdr->sh_type == SHT_SUNW_DEBUGSTR))) {
SET_CANDIDATE(sinfo->flags);
Sect_exists++;
}
/*
* Zap this file ?
*/
if ((cmd_info->flags & zFLAG) &&
(shdr->sh_type == SHT_PROGBITS)) {
SET_CANDIDATE(sinfo->flags);
Sect_exists++;
}
x = GET_LOC(sinfo->flags);
/*
* Remeber the note sections index so that we can
* reset the NOTE segments offset to point to it.
*
* It may have been assigned a new location in the
* resulting output elf image.
*/
if (shdr->sh_type == SHT_NOTE)
notesctndx = scn_index;
if (x == IN || x == PRIOR)
off_table[scn_index] =
shdr->sh_offset;
if (shdr->sh_type == SHT_NOBITS)
nobits_table[scn_index] = 1;
/*
* If this section satisfies the condition,
* apply the actions specified.
*/
if (ISCANDIDATE(sinfo->flags)) {
ret += apply_action(sinfo, cur_file, cmd_info);
}
/*
* If I am strip command, determine if symtab can go or not.
*/
if (CHK_OPT(cmd_info, I_AM_STRIP) &&
(CHK_OPT(cmd_info, xFLAG) == 0) &&
(CHK_OPT(cmd_info, lFLAG) == 0)) {
if (shdr->sh_type == SHT_SYMTAB &&
GET_LOC(sinfo->flags) == AFTER) {
SYM = scn_index;
}
}
scn_index++;
sinfo++;
}
sinfo->scn = (Elf_Scn *) -1;
/*
* If there were any errors traversing the file,
* just return error.
*/
if (ret != 0)
return (FAILURE);
/*
* Remove symbol table if possible
*/
if (CHK_OPT(cmd_info, I_AM_STRIP) && SYM != 0) {
GElf_Shdr tmp_shdr;
(void) gelf_getshdr(sec_table[SYM].scn, &tmp_shdr);
sec_table[SYM].secno = (GElf_Word)DELETED;
++(cmd_info->no_of_nulled);
if (Sect_exists == 0)
++Sect_exists;
SET_ACTION(sec_table[SYM].flags, ACT_DELETE);
off_table[SYM] = 0;
/*
* Can I remove section header
* string table ?
*/
if ((tmp_shdr.sh_link < shnum) &&
(tmp_shdr.sh_link != SHN_UNDEF) &&
(tmp_shdr.sh_link != shstrndx) &&
(GET_LOC(sec_table[tmp_shdr.sh_link].flags) == AFTER)) {
sec_table[tmp_shdr.sh_link].secno = (GElf_Word)DELETED;
++(cmd_info->no_of_nulled);
if (Sect_exists == 0)
++Sect_exists;
SET_ACTION(sec_table[tmp_shdr.sh_link].flags,\
ACT_DELETE);
off_table[tmp_shdr.sh_link] = 0;
}
}
/*
* If I only printed the contents, then
* just report so.
*/
if (CHK_OPT(cmd_info, pFLAG) && !CHK_OPT(cmd_info, MIGHT_CHG))
return (DONT_BUILD); /* don't bother creating a new file */
/* since the file has not changed */
/*
* I might need to add a new section. Check it.
*/
if (Sect_exists == 0 && CHK_OPT(cmd_info, aFLAG)) {
int act = 0;
new_sec_string = calloc(1, cmd_info->str_size + 1);
if (new_sec_string == NULL)
return (FAILURE);
for (act = 0; act < actmax; act++) {
if (Action[act].a_action == ACT_APPEND) {
(void) strcat(new_sec_string,
Action[act].a_string);
(void) strcat(new_sec_string, "\n");
cmd_info->no_of_append = 1;
}
}
}
/*
* If I did not append any new sections, and I did not
* modify/delete any sections, then just report so.
*/
if ((Sect_exists == 0 && cmd_info->no_of_append == 0) ||
!CHK_OPT(cmd_info, MIGHT_CHG))
return (DONT_BUILD);
/*
* Found at least one section which was processed.
* Deleted or Appended or Compressed.
*/
if (Sect_exists) {
/*
* First, handle the deleted sections.
*/
if (cmd_info->no_of_delete != 0 ||
cmd_info->no_of_nulled != 0) {
int acc = 0;
int rel_idx;
/*
* Handle relocation/target
* sections.
*/
sinfo = &(sec_table[0]);
for (i = 1; i < shnum; i++) {
sinfo++;
rel_idx = sinfo->rel_scn_index;
if (rel_idx == 0)
continue;
/*
* If I am removed, then remove my
* target section.
*/
if (((sinfo->secno ==
(GElf_Word)DELETED) ||
(sinfo->secno ==
(GElf_Word)NULLED)) &&
sinfo->rel_loc != IN) {
if (GET_LOC(sec_table[rel_idx].flags) ==
PRIOR)
sec_table[rel_idx].secno =
(GElf_Word)NULLED;
else
sec_table[rel_idx].secno =
(GElf_Word)DELETED;
SET_ACTION(sec_table[rel_idx].flags,\
ACT_DELETE);
}
/*
* I am not removed. Check if my target is
* removed or nulled. If so, let me try to
* remove my self.
*/
if (((sec_table[rel_idx].secno ==
(GElf_Word)DELETED) ||
(sec_table[rel_idx].secno ==
(GElf_Word)NULLED)) &&
(GET_LOC(sinfo->flags) != IN)) {
if (GET_LOC(sinfo->flags) ==
PRIOR)
sinfo->secno =
(GElf_Word)NULLED;
else
sinfo->secno =
(GElf_Word)DELETED;
SET_ACTION(sinfo->flags,\
ACT_DELETE);
}
}
/*
* Now, take care of DELETED sections
*/
sinfo = &(sec_table[1]);
for (i = 1; i < shnum; i++) {
shdr = &(sinfo->shdr);
if (sinfo->secno == (GElf_Word)DELETED) {
acc++;
/*
* The SHT_GROUP section which this section
* is a member may be able to be removed.
* See post_process().
*/
if (shdr->sh_flags & SHF_GROUP)
cmd_info->flags |= SHF_GROUP_DEL;
} else {
/*
* The data buffer of SHT_GROUP this section
* is a member needs to be updated.
* See post_process().
*/
sinfo->secno -= acc;
if ((shdr->sh_flags &
SHF_GROUP) && (acc != 0))
cmd_info->flags |= SHF_GROUP_MOVE;
}
sinfo++;
}
}
}
/*
* I know that the file has been modified.
* A new file need to be created.
*/
return (SUCCESS);
}
void check_coalescing (void *bp)
{
if ( !GET_ALLOC(HDRP(GET_LOC(bp))) &&
!GET_ALLOC(HDRP(NEXT_BLKP(GET_LOC(bp)))))
printf ("Blocks not coalesced properly");
}
void check_in_correct_bucket(void *bp, int bucket)
{
int offset = get_offset( GET_SIZE(HDRP(GET_LOC(bp))));
if (offset != bucket)
printf("Block is in the wrong bucket! \n");
}
