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/***************************************************************/
/* perk: PE Resource Kit */
/* Copyright (C) 2015--2021 SysDeer Technologies, LLC */
/* Released under GPLv2 and GPLv3; see COPYING.PERK. */
/***************************************************************/
#include <stdint.h>
#include <stdbool.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <perk/perk.h>
#include "perk_driver_impl.h"
#include "perk_errinfo_impl.h"
int pe_map_raw_image(
const struct pe_driver_ctx * dctx,
int fd,
const char * path,
int prot,
struct pe_raw_image * map)
{
int ret;
struct stat st;
bool fnew;
int fdcwd;
fdcwd = pe_driver_fdcwd(dctx);
if ((fnew = (fd < 0)))
fd = openat(fdcwd,path,O_RDONLY | O_CLOEXEC);
if (fd < 0)
return PERK_SYSTEM_ERROR(dctx);
if ((ret = fstat(fd,&st) < 0) && fnew)
close(fd);
else if ((st.st_size == 0) && fnew)
close(fd);
if (ret < 0)
return PERK_SYSTEM_ERROR(dctx);
else if (st.st_size == 0)
return PERK_CUSTOM_ERROR(
dctx,PERK_ERR_IMAGE_SIZE_ZERO);
map->map_size = st.st_size;
map->map_addr = mmap(0,map->map_size,prot,MAP_PRIVATE,fd,0);
if (fnew)
close(fd);
return (map->map_addr == MAP_FAILED)
? PERK_SYSTEM_ERROR(dctx)
: 0;
}
int pe_unmap_raw_image(struct pe_raw_image * map)
{
return munmap(map->map_addr,map->map_size);
}
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