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#ifdef HAVE_LIBELF
#include <fcntl.h>
#include <gelf.h>
#include <unistd.h>
/* This should be defined before #include "utils.h" */
#define PR_FMT "symbol"
#define PR_DOMAIN DBG_SYMBOL
#include "utils/symbol-libelf.h"
#include "utils/utils.h"
int elf_init(const char *filename, struct uftrace_elf_data *elf)
{
elf->fd = open(filename, O_RDONLY);
if (elf->fd < 0) {
pr_dbg("error during open ELF file: %s: %m\n", filename);
goto err;
}
elf_version(EV_CURRENT);
elf->handle = elf_begin(elf->fd, ELF_C_READ_MMAP, NULL);
if (elf->handle == NULL)
goto err_close;
if (gelf_getehdr(elf->handle, &elf->ehdr) == NULL)
goto err_end;
return 0;
err_end:
elf_end(elf->handle);
err_close:
pr_dbg("ELF error when loading symbols: %s\n", elf_errmsg(elf_errno()));
close(elf->fd);
elf->fd = -1;
err:
elf->handle = NULL;
return -1;
}
void elf_finish(struct uftrace_elf_data *elf)
{
if (elf->fd < 0)
return;
elf_end(elf->handle);
elf->handle = NULL;
close(elf->fd);
elf->fd = -1;
}
void elf_get_secdata(struct uftrace_elf_data *elf, struct uftrace_elf_iter *iter)
{
iter->data = elf_getdata((iter)->scn, NULL);
}
void elf_read_secdata(struct uftrace_elf_data *elf, struct uftrace_elf_iter *iter, unsigned offset,
void *buf, size_t len)
{
memcpy(buf, iter->data->d_buf + offset, len);
}
#endif /* HAVE_LIBELF */
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