/*
* Get the ELF header and, if it exists, call get_symtab()
* to begin processing of the file; otherwise, return from
* processing the file with a warning.
*/
static void
process(Elf *elf_file, char *filename)
{
GElf_Ehdr ehdr;
if (gelf_getehdr(elf_file, &ehdr) == NULL) {
(void) fprintf(stderr,
"%s: %s: %s\n", prog_name, filename, elf_errmsg(-1));
return;
}
set_A_header(filename);
get_symtab(elf_file, filename);
}
int mips_elf_load(struct mips_cpu *pcpu, const char *elf, size_t elfsz)
{
Elf32_Ehdr *eh = (Elf32_Ehdr*)elf;
Elf32_Sym *symgp; /* global pointer value */
Elf32_Sym *symend; /* end of data; break start */
pcpu->elf = elf;
pcpu->elfsz = elfsz;
/* Check ELF format and load segments to their proper places. Don't allow
* segment data to overflow into area reserved for stack. */
if(check_eh_limits(eh, elfsz))
return -1;
if(load_segments(pcpu))
return -1;
if(get_symtab(elf, elfsz, &pcpu->shsymtab, &pcpu->shsymstr))
return -1;
if(eh->e_entry >= pcpu->memsz - pcpu->stksz)
return -1;
/* Segments successfully loaded; set up registers for program start. */
symgp = mips_elf_find_symbol(pcpu, "_gp");
if(!symgp || (symgp->st_shndx != SHN_ABS)
|| (symgp->st_value >= pcpu->memsz - pcpu->stksz)
|| (symgp->st_value < MIPS_LOWBASE))
return -1;
symend = mips_elf_find_symbol(pcpu, "_end");
if(!symend || (symend->st_shndx != SHN_ABS)
|| (symend->st_value >= pcpu->memsz - pcpu->stksz)
|| (symend->st_value < MIPS_LOWBASE))
return -1;
if((eh->e_entry >= pcpu->memsz - pcpu->stksz)
|| (eh->e_entry < MIPS_LOWBASE))
return -1;
pcpu->brk = symend->st_value;
pcpu->pc = eh->e_entry;
pcpu->r.ur[28] = symgp->st_value; /* global data pointer */
pcpu->r.ur[29] = pcpu->memsz - 4; /* stack pointer */
pcpu->r.ur[31] = 0; /* link register */
return 0;
}
void __cyg_profile_func_enter(void* func, void* callsite) {
void* funcptr;
uint64_t time;
HashNode* hn;
funcptr = DEREF_IA64_FUNC_PTR(func);
/* -- if not yet initialized, initialize VampirTrace -- */
if ( gnu_init ) {
VT_MEMHOOKS_OFF();
gnu_init = 0;
vt_open();
vt_comp_finalize = gnu_finalize;
get_symtab();
VT_MEMHOOKS_ON();
}
/* -- if VampirTrace already finalized, return -- */
if ( !vt_is_alive ) return;
VT_MEMHOOKS_OFF();
time = vt_pform_wtime();
/* -- get region identifier -- */
if ( (hn = hash_get((long)funcptr))) {
if ( hn->vtid == VT_NO_ID ) {
/* -- region entered the first time, register region -- */
#if (defined(VT_MT) || defined(VT_HYB))
VTTHRD_LOCK_IDS();
if( hn->vtid == VT_NO_ID )
register_region(hn);
VTTHRD_UNLOCK_IDS();
#else /* VT_MT || VT_HYB */
register_region(hn);
#endif /* VT_MT || VT_HYB */
}
/* -- write enter record -- */
vt_enter(VT_CURRENT_THREAD, &time, hn->vtid);
}
VT_MEMHOOKS_ON();
}
/* return size needed by the module */
int
elf_mod_sizes(int fd, size_t *modsize, int *strtablen,
struct lmc_resrv *resrvp, struct stat *sp)
{
Elf_Ehdr ehdr;
ssize_t off = 0;
size_t data_hole = 0;
char *shstrtab, *strtab;
struct elf_section *head, *s, *stab;
if (read_elf_header(fd, &ehdr) < 0)
return -1;
shstrtab = read_shstring_table(fd, &ehdr);
read_sections(fd, &ehdr, shstrtab, &head);
for (s = head; s; s = s->next) {
/* XXX impossible! */
if (s->type == SHT_STRTAB && s->type == SHT_SYMTAB &&
s->type == SHT_DYNSYM)
continue;
if (debug)
fprintf(stderr,
"%s: addr = %p size = %#lx align = %#lx\n",
s->name, s->addr, (u_long)s->size, (u_long)s->align);
/*
* XXX try to get rid of the hole before the data
* section that GNU-ld likes to put there
*/
if (strcmp(s->name, ".data") == 0 && s->addr > (void *)off) {
data_offset = roundup(off, s->align);
if (debug)
fprintf(stderr, ".data section forced to "
"offset %p (was %p)\n",
(void *)data_offset, s->addr);
/* later remove size of compressed hole from off */
data_hole = (ssize_t)s->addr - data_offset;
}
off = (ssize_t)s->addr + s->size;
}
off -= data_hole;
/* XXX round to pagesize? */
*modsize = roundup(off, sysconf(_SC_PAGESIZE));
/* get string table length */
strtab = read_string_table(fd, head, strtablen);
free(shstrtab);
free(strtab);
/* get symbol table sections */
get_symtab(&head);
stab = head;
resrvp->sym_symsize = 0;
while (stab) {
resrvp->sym_symsize += stab->size;
stab = stab->next;
}
resrvp->sym_size = resrvp->sym_symsize + *strtablen;
free_sections(head);
return (0);
}
