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/*
* LoongArch kexec PE format binary image support.
*
* Copyright (C) 2022 Loongson Technology Corporation Limited.
* Youling Tang <tangyouling@loongson.cn>
*
* derived from kexec-image-arm64.c
*
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
#define _GNU_SOURCE
#include <limits.h>
#include <errno.h>
#include <elf.h>
#include "kexec.h"
#include "kexec-elf.h"
#include "image-header.h"
#include "kexec-syscall.h"
#include "crashdump-loongarch.h"
#include "kexec-loongarch.h"
#include "arch/options.h"
int pei_loongarch_probe(const char *kernel_buf, off_t kernel_size)
{
const struct loongarch_image_header *h;
if (kernel_size < sizeof(struct loongarch_image_header)) {
dbgprintf("%s: No loongarch image header.\n", __func__);
return -1;
}
h = (const struct loongarch_image_header *)(kernel_buf);
if (!loongarch_header_check_pe_sig(h)) {
dbgprintf("%s: Bad loongarch PE image header.\n", __func__);
return -1;
}
return 0;
}
int pei_loongarch_load(int argc, char **argv, const char *buf,
off_t len, struct kexec_info *info)
{
int result;
unsigned long hole_min = 0;
unsigned long kernel_segment, kernel_entry;
const struct loongarch_image_header *header;
header = (const struct loongarch_image_header *)(buf);
if (loongarch_process_image_header(header))
return EFAILED;
kernel_segment = loongarch_locate_kernel_segment(info);
if (kernel_segment == ULONG_MAX) {
dbgprintf("%s: Kernel segment is not allocated\n", __func__);
result = EFAILED;
goto exit;
}
kernel_entry = virt_to_phys(loongarch_header_kernel_entry(header));
if (info->kexec_flags & KEXEC_ON_CRASH)
/*
* offset addresses in order to load vmlinux.efi into
* crash kernel's memory.
*/
kernel_entry += crash_reserved_mem[usablemem_rgns.size - 1].start;
dbgprintf("%s: kernel_segment: %016lx\n", __func__, kernel_segment);
dbgprintf("%s: kernel_entry: %016lx\n", __func__, kernel_entry);
dbgprintf("%s: image_size: %016lx\n", __func__,
loongarch_mem.image_size);
dbgprintf("%s: text_offset: %016lx\n", __func__,
loongarch_mem.text_offset);
dbgprintf("%s: phys_offset: %016lx\n", __func__,
loongarch_mem.phys_offset);
dbgprintf("%s: PE format: %s\n", __func__,
(loongarch_header_check_pe_sig(header) ? "yes" : "no"));
/* Get kernel entry point */
info->entry = (void *)kernel_entry;
hole_min = kernel_segment + loongarch_mem.image_size;
/* Create and initialize elf core header segment */
if (info->kexec_flags & KEXEC_ON_CRASH) {
result = load_crashdump_segments(info);
if (result) {
dbgprintf("%s: Creating eflcorehdr failed.\n",
__func__);
goto exit;
}
}
/* Load the kernel */
add_segment(info, buf, len, kernel_segment, loongarch_mem.image_size);
/* Prepare and load dtb and initrd data */
result = loongarch_load_other_segments(info, hole_min);
if (result) {
fprintf(stderr, "kexec: Load dtb and initrd segments failed.\n");
goto exit;
}
exit:
if (result)
fprintf(stderr, "kexec: load failed.\n");
return result;
}
void pei_loongarch_usage(void)
{
printf(
" An LoongArch PE format binary image, uncompressed, little endian.\n"
" Typically a vmlinux.efi file.\n\n");
}
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