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-rw-r--r--kexec/arch/i386/crashdump-x86.c237
1 files changed, 29 insertions, 208 deletions
diff --git a/kexec/arch/i386/crashdump-x86.c b/kexec/arch/i386/crashdump-x86.c
index 6e3e27b..1048c67 100644
--- a/kexec/arch/i386/crashdump-x86.c
+++ b/kexec/arch/i386/crashdump-x86.c
@@ -462,194 +462,29 @@ static int get_crash_notes(int cpu, uint64_t *addr, uint64_t *len)
return get_crash_notes_per_cpu(cpu, addr, len);
}
-/* Prepares the crash memory elf64 headers and stores in supplied buffer. */
-static int prepare_crash_memory_elf64_headers(struct kexec_info *info,
- void *buf, unsigned long size)
+static struct crash_elf_info elf_info64 =
{
- Elf64_Ehdr *elf;
- Elf64_Phdr *phdr;
- int i;
- char *bufp;
- long int nr_cpus = 0;
- uint64_t notes_addr, notes_len;
-
- bufp = (char*) buf;
-
- /* Setup ELF Header*/
- elf = (Elf64_Ehdr *) bufp;
- bufp += sizeof(Elf64_Ehdr);
- memcpy(elf->e_ident, ELFMAG, SELFMAG);
- elf->e_ident[EI_CLASS] = ELFCLASS64;
- elf->e_ident[EI_DATA] = ELFDATA2LSB;
- elf->e_ident[EI_VERSION]= EV_CURRENT;
- elf->e_ident[EI_OSABI] = ELFOSABI_NONE;
- memset(elf->e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD);
- elf->e_type = ET_CORE;
- elf->e_machine = EM_386;
- elf->e_version = EV_CURRENT;
- elf->e_entry = 0;
- elf->e_phoff = sizeof(Elf64_Ehdr);
- elf->e_shoff = 0;
- elf->e_flags = 0;
- elf->e_ehsize = sizeof(Elf64_Ehdr);
- elf->e_phentsize= sizeof(Elf64_Phdr);
- elf->e_phnum = 0;
- elf->e_shentsize= 0;
- elf->e_shnum = 0;
- elf->e_shstrndx = 0;
-
- /* PT_NOTE program headers. One per cpu*/
- nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
- if (nr_cpus < 0) {
- return -1;
- }
-
- for (i = 0; i < nr_cpus; i++) {
- if (get_crash_notes(i, &notes_addr, &notes_len) < 0) {
- /* This cpu is not present. Skip it. */
- continue;
- }
- phdr = (Elf64_Phdr *) bufp;
- bufp += sizeof(Elf64_Phdr);
- phdr->p_type = PT_NOTE;
- phdr->p_flags = 0;
- phdr->p_offset = phdr->p_paddr = notes_addr;
- phdr->p_vaddr = 0;
- phdr->p_filesz = phdr->p_memsz = notes_len;
- /* Do we need any alignment of segments? */
- phdr->p_align = 0;
-
- /* Increment number of program headers. */
- (elf->e_phnum)++;
- }
-
- /* Setup PT_LOAD type program header for every system RAM chunk.
- * A seprate program header for Backup Region*/
- for (i = 0; i < CRASH_MAX_MEMORY_RANGES; i++) {
- unsigned long long mstart, mend;
- if (crash_memory_range[i].type != RANGE_RAM)
- continue;
- mstart = crash_memory_range[i].start;
- mend = crash_memory_range[i].end;
- if (!mstart && !mend)
- continue;
- phdr = (Elf64_Phdr *) bufp;
- bufp += sizeof(Elf64_Phdr);
- phdr->p_type = PT_LOAD;
- phdr->p_flags = PF_R|PF_W|PF_X;
- if (mstart == BACKUP_SRC_START && mend == BACKUP_SRC_END)
- phdr->p_offset = info->backup_start;
- else
- phdr->p_offset = mstart;
- /* Handle linearly mapped region.*/
- if (mend <= (MAXMEM - 1))
- phdr->p_vaddr = mstart + PAGE_OFFSET;
- else
- phdr->p_vaddr = -1ULL;
- phdr->p_paddr = mstart;
- phdr->p_filesz = phdr->p_memsz = mend - mstart + 1;
- /* Do we need any alignment of segments? */
- phdr->p_align = 0;
-
- /* Increment number of program headers. */
- (elf->e_phnum)++;
- }
- return 0;
-}
-
-/* Prepares the crash memory elf32 headers and stores in supplied buffer. */
-static int prepare_crash_memory_elf32_headers(struct kexec_info *info,
- void *buf, unsigned long size)
+ class: ELFCLASS64,
+ data: ELFDATA2LSB,
+ machine: EM_386,
+ backup_src_start: BACKUP_SRC_START,
+ backup_src_end: BACKUP_SRC_END,
+ page_offset: PAGE_OFFSET,
+ lowmem_limit: MAXMEM,
+ get_note_info: get_crash_notes,
+};
+
+static struct crash_elf_info elf_info32 =
{
- Elf32_Ehdr *elf;
- Elf32_Phdr *phdr;
- int i;
- char *bufp;
- long int nr_cpus = 0;
- uint64_t notes_addr, notes_len;
-
- bufp = (char*) buf;
-
- /* Setup ELF Header*/
- elf = (Elf32_Ehdr *) bufp;
- bufp += sizeof(Elf32_Ehdr);
- memcpy(elf->e_ident, ELFMAG, SELFMAG);
- elf->e_ident[EI_CLASS] = ELFCLASS32;
- elf->e_ident[EI_DATA] = ELFDATA2LSB;
- elf->e_ident[EI_VERSION]= EV_CURRENT;
- elf->e_ident[EI_OSABI] = ELFOSABI_NONE;
- memset(elf->e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD);
- elf->e_type = ET_CORE;
- elf->e_machine = EM_386;
- elf->e_version = EV_CURRENT;
- elf->e_entry = 0;
- elf->e_phoff = sizeof(Elf32_Ehdr);
- elf->e_shoff = 0;
- elf->e_flags = 0;
- elf->e_ehsize = sizeof(Elf32_Ehdr);
- elf->e_phentsize= sizeof(Elf32_Phdr);
- elf->e_phnum = 0;
- elf->e_shentsize= 0;
- elf->e_shnum = 0;
- elf->e_shstrndx = 0;
-
- /* PT_NOTE program headers. One per cpu*/
- nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
- if (nr_cpus < 0) {
- return -1;
- }
-
- for (i = 0; i < nr_cpus; i++) {
- if (get_crash_notes(i, &notes_addr, &notes_len) < 0) {
- /* This cpu is not present. Skip it. */
- continue;
- }
- phdr = (Elf32_Phdr *) bufp;
- bufp += sizeof(Elf32_Phdr);
- phdr->p_type = PT_NOTE;
- phdr->p_flags = 0;
- phdr->p_offset = phdr->p_paddr = notes_addr;
- phdr->p_vaddr = 0;
- phdr->p_filesz = phdr->p_memsz = notes_len;
- /* Do we need any alignment of segments? */
- phdr->p_align = 0;
-
- /* Increment number of program headers. */
- (elf->e_phnum)++;
- }
-
- /* Setup PT_LOAD type program header for every system RAM chunk.
- * A seprate program header for Backup Region*/
- for (i = 0; i < CRASH_MAX_MEMORY_RANGES; i++) {
- unsigned long long mstart, mend;
- if (crash_memory_range[i].type != RANGE_RAM)
- continue;
- mstart = crash_memory_range[i].start;
- mend = crash_memory_range[i].end;
- if (!mstart && !mend)
- continue;
- phdr = (Elf32_Phdr *) bufp;
- bufp += sizeof(Elf32_Phdr);
- phdr->p_type = PT_LOAD;
- phdr->p_flags = PF_R|PF_W|PF_X;
- if (mstart == BACKUP_SRC_START && mend == BACKUP_SRC_END)
- phdr->p_offset = info->backup_start;
- else
- phdr->p_offset = mstart;
- /* Handle linearly mapped region.*/
- if (mend <= (MAXMEM - 1))
- phdr->p_vaddr = mstart + PAGE_OFFSET;
- else
- phdr->p_vaddr = UINT_MAX;
- phdr->p_paddr = mstart;
- phdr->p_filesz = phdr->p_memsz = mend - mstart + 1;
- /* Do we need any alignment of segments? */
- phdr->p_align = 0;
- /* Increment number of program headers. */
- (elf->e_phnum)++;
- }
- return 0;
-}
+ class: ELFCLASS32,
+ data: ELFDATA2LSB,
+ machine: EM_386,
+ backup_src_start: BACKUP_SRC_START,
+ backup_src_end: BACKUP_SRC_END,
+ page_offset: PAGE_OFFSET,
+ lowmem_limit: MAXMEM,
+ get_note_info: get_crash_notes,
+};
/* Loads additional segments in case of a panic kernel is being loaded.
* One segment for backup region, another segment for storing elf headers
@@ -661,7 +496,6 @@ int load_crashdump_segments(struct kexec_info *info, char* mod_cmdline,
void *tmp;
unsigned long sz, elfcorehdr;
int nr_ranges, align = 1024;
- long int nr_cpus = 0;
struct memory_range *mem_range, *memmap_p;
if (get_crash_memory_ranges(&mem_range, &nr_ranges) < 0)
@@ -687,29 +521,16 @@ int load_crashdump_segments(struct kexec_info *info, char* mod_cmdline,
return -1;
/* Create elf header segment and store crash image data. */
- nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
- if (nr_cpus < 0) {
- fprintf(stderr,"kexec_load (elf header segment)"
- " failed: %s\n", strerror(errno));
- return -1;
- }
if (arch_options.core_header_type == CORE_TYPE_ELF64) {
- sz = sizeof(Elf64_Ehdr) +
- nr_cpus * sizeof(Elf64_Phdr) +
- nr_ranges * sizeof(Elf64_Phdr);
- } else {
- sz = sizeof(Elf32_Ehdr) +
- nr_cpus * sizeof(Elf32_Phdr) +
- nr_ranges * sizeof(Elf32_Phdr);
- }
- sz = (sz + align - 1) & ~(align -1);
- tmp = xmalloc(sz);
- memset(tmp, 0, sz);
- if (arch_options.core_header_type == CORE_TYPE_ELF64) {
- if (prepare_crash_memory_elf64_headers(info, tmp, sz) < 0)
+ if (crash_create_elf64_headers(info, &elf_info64,
+ crash_memory_range, nr_ranges,
+ &tmp, &sz) < 0)
return -1;
- } else {
- if (prepare_crash_memory_elf32_headers(info, tmp, sz) < 0)
+ }
+ else {
+ if (crash_create_elf32_headers(info, &elf_info32,
+ crash_memory_range, nr_ranges,
+ &tmp, &sz) < 0)
return -1;
}
generated by cgit (git 2.34.1) at 2025-07-19 15:25:08 +0000