/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/elf/elf.h"
#include "libc/limits.h"

void GetElfVirtualAddressRange(const Elf64_Ehdr *elf, size_t elfsize,
                               intptr_t *out_start, intptr_t *out_end) {
  unsigned i;
  Elf64_Phdr *phdr;
  intptr_t start, end, pstart, pend;
  start = INTPTR_MAX;
  end = 0;
  for (i = 0; i < elf->e_phnum; ++i) {
    phdr = GetElfSegmentHeaderAddress(elf, elfsize, i);
    if (phdr->p_type != PT_LOAD) continue;
    pstart = phdr->p_vaddr;
    pend = phdr->p_vaddr + phdr->p_memsz;
    if (pstart < start) start = pstart;
    if (pend > end) end = pend;
  }
  if (out_start) *out_start = start;
  if (out_end) *out_end = end;
}