void *kdump_core32_header_init(const struct mrdump_control_block *mrdump_cb, uint64_t kmem_address, uint64_t kmem_size)
{
struct elf32_phdr *nhdr, *phdr;
struct elf32_hdr *elf;
off_t offset = 0;
const struct mrdump_machdesc *kparams = &mrdump_cb->machdesc;
uint8_t *oldbufp = malloc(KDUMP_CORE_HEADER_SIZE);
uint8_t *bufp = oldbufp;
elf = (struct elf32_hdr *) bufp;
bufp += sizeof(struct elf32_hdr);
offset += sizeof(struct elf32_hdr);
mrdump_elf_setup_eident(elf->e_ident, ELFCLASS32);
mrdump_elf_setup_elfhdr(elf, EM_ARM, struct elf32_hdr, struct elf32_phdr)
nhdr = (struct elf32_phdr *) bufp;
bufp += sizeof(struct elf32_phdr);
offset += sizeof(struct elf32_phdr);
memset(nhdr, 0, sizeof(struct elf32_phdr));
nhdr->p_type = PT_NOTE;
phdr = (struct elf32_phdr *) bufp;
bufp += sizeof(struct elf32_phdr);
offset += sizeof(struct elf32_phdr);
uint32_t low_memory_size = kparams->high_memory - kparams->page_offset;
if (low_memory_size > kmem_size) {
low_memory_size = kmem_size;
}
phdr->p_type = PT_LOAD;
phdr->p_flags = PF_R|PF_W|PF_X;
phdr->p_offset = KDUMP_CORE_HEADER_SIZE;
phdr->p_vaddr = (size_t) kparams->page_offset;
phdr->p_paddr = kmem_address;
phdr->p_filesz = kmem_size;
phdr->p_memsz = low_memory_size;
phdr->p_align = 0;
nhdr->p_offset = offset;
/* NT_PRPSINFO */
struct elf32_prpsinfo prpsinfo;
struct memelfnote notes;
/* set up the process info */
notes.name = CORE_STR;
notes.type = NT_PRPSINFO;
notes.datasz = sizeof(struct elf32_prpsinfo);
notes.data = &prpsinfo;
memset(&prpsinfo, 0, sizeof(struct elf32_prpsinfo));
prpsinfo.pr_state = 0;
prpsinfo.pr_sname = 'R';
prpsinfo.pr_zomb = 0;
prpsinfo.pr_gid = prpsinfo.pr_uid = mrdump_cb->crash_record.fault_cpu + 1;
strlcpy(prpsinfo.pr_fname, "vmlinux", sizeof(prpsinfo.pr_fname));
strlcpy(prpsinfo.pr_psargs, "vmlinux", ELF_PRARGSZ);
nhdr->p_filesz += notesize(¬es);
bufp = storenote(¬es, bufp);
bufp = kdump_core_write_machdesc(mrdump_cb, nhdr, bufp);
/* Store pre-cpu backtrace */
bufp = kdump_core_write_cpu_note(mrdump_cb, mrdump_cb->crash_record.fault_cpu, nhdr, bufp);
for (unsigned int cpu = 0; cpu < kparams->nr_cpus; cpu++) {
if (cpu != mrdump_cb->crash_record.fault_cpu) {
bufp = kdump_core_write_cpu_note(mrdump_cb, cpu, nhdr, bufp);
}
}
// voprintf_debug("%s cpu %d header size %d\n", __FUNCTION__, kparams->nr_cpus, bufp - oldbufp);
return oldbufp;
}
void *kdump_core_header_init(const struct mrdump_control_block *mrdump_cb, uint32_t kmem_address, uint32_t kmem_size)
{
struct elf_phdr *nhdr, *phdr;
struct elfhdr *elf;
off_t offset = 0;
const struct mrdump_machdesc *kparams = &mrdump_cb->machdesc;
uint8_t *oldbufp = malloc(KDUMP_CORE_SIZE);
uint8_t *bufp = oldbufp;
/* setup ELF header */
elf = (struct elfhdr *) bufp;
bufp += sizeof(struct elfhdr);
offset += sizeof(struct elfhdr);
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_ARM;
elf->e_version = EV_CURRENT;
elf->e_entry = 0;
elf->e_phoff = sizeof(struct elfhdr);
elf->e_shoff = 0;
elf->e_flags = ELF_CORE_EFLAGS;
elf->e_ehsize = sizeof(struct elfhdr);
elf->e_phentsize= sizeof(struct elf_phdr);
elf->e_phnum = 2;
elf->e_shentsize= 0;
elf->e_shnum = 0;
elf->e_shstrndx = 0;
nhdr = (struct elf_phdr *) bufp;
bufp += sizeof(struct elf_phdr);
offset += sizeof(struct elf_phdr);
memset(nhdr, 0, sizeof(struct elf_phdr));
nhdr->p_type = PT_NOTE;
phdr = (struct elf_phdr *) bufp;
bufp += sizeof(struct elf_phdr);
offset += sizeof(struct elf_phdr);
uint32_t low_memory_size = kparams->high_memory - kparams->page_offset;
if (low_memory_size > kmem_size) {
low_memory_size = kmem_size;
}
phdr->p_type = PT_LOAD;
phdr->p_flags = PF_R|PF_W|PF_X;
phdr->p_offset = KDUMP_CORE_SIZE;
phdr->p_vaddr = (size_t) kparams->page_offset;
phdr->p_paddr = kmem_address;
phdr->p_filesz = kmem_size;
phdr->p_memsz = low_memory_size;
phdr->p_align = KDUMP_CORE_SIZE;
nhdr->p_offset = offset;
struct elf_prpsinfo prpsinfo; /* NT_PRPSINFO */
struct memelfnote notes;
/* set up the process info */
notes.name = CORE_STR;
notes.type = NT_PRPSINFO;
notes.datasz = sizeof(struct elf_prpsinfo);
notes.data = &prpsinfo;
memset(&prpsinfo, 0, sizeof(struct elf_prpsinfo));
prpsinfo.pr_state = 0;
prpsinfo.pr_sname = 'R';
prpsinfo.pr_zomb = 0;
prpsinfo.pr_gid = prpsinfo.pr_uid = mrdump_cb->crash_record.fault_cpu + 1;
strlcpy(prpsinfo.pr_fname, "vmlinux", sizeof(prpsinfo.pr_fname));
strlcpy(prpsinfo.pr_psargs, "vmlinux", ELF_PRARGSZ);
nhdr->p_filesz += notesize(¬es);
bufp = storenote(¬es, bufp);
bufp = kdump_core_write_machdesc(mrdump_cb, nhdr, bufp);
/* Store pre-cpu backtrace */
bufp = kdump_core_write_cpu_note(mrdump_cb, mrdump_cb->crash_record.fault_cpu, nhdr, bufp);
for (unsigned int cpu = 0; cpu < kparams->nr_cpus; cpu++) {
if (cpu != mrdump_cb->crash_record.fault_cpu) {
bufp = kdump_core_write_cpu_note(mrdump_cb, cpu, nhdr, bufp);
}
}
voprintf_debug("%s cpu %d header size %d\n", __FUNCTION__, kparams->nr_cpus, bufp - oldbufp);
return oldbufp;
}
