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Diffstat (limited to 'ANDROID_3.4.5/fs/proc/vmcore.c')
-rw-r--r--ANDROID_3.4.5/fs/proc/vmcore.c725
1 files changed, 0 insertions, 725 deletions
diff --git a/ANDROID_3.4.5/fs/proc/vmcore.c b/ANDROID_3.4.5/fs/proc/vmcore.c
deleted file mode 100644
index 0d5071d2..00000000
--- a/ANDROID_3.4.5/fs/proc/vmcore.c
+++ /dev/null
@@ -1,725 +0,0 @@
-/*
- * fs/proc/vmcore.c Interface for accessing the crash
- * dump from the system's previous life.
- * Heavily borrowed from fs/proc/kcore.c
- * Created by: Hariprasad Nellitheertha (hari@in.ibm.com)
- * Copyright (C) IBM Corporation, 2004. All rights reserved
- *
- */
-
-#include <linux/mm.h>
-#include <linux/proc_fs.h>
-#include <linux/user.h>
-#include <linux/elf.h>
-#include <linux/elfcore.h>
-#include <linux/export.h>
-#include <linux/slab.h>
-#include <linux/highmem.h>
-#include <linux/bootmem.h>
-#include <linux/init.h>
-#include <linux/crash_dump.h>
-#include <linux/list.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-/* List representing chunks of contiguous memory areas and their offsets in
- * vmcore file.
- */
-static LIST_HEAD(vmcore_list);
-
-/* Stores the pointer to the buffer containing kernel elf core headers. */
-static char *elfcorebuf;
-static size_t elfcorebuf_sz;
-
-/* Total size of vmcore file. */
-static u64 vmcore_size;
-
-static struct proc_dir_entry *proc_vmcore = NULL;
-
-/*
- * Returns > 0 for RAM pages, 0 for non-RAM pages, < 0 on error
- * The called function has to take care of module refcounting.
- */
-static int (*oldmem_pfn_is_ram)(unsigned long pfn);
-
-int register_oldmem_pfn_is_ram(int (*fn)(unsigned long pfn))
-{
- if (oldmem_pfn_is_ram)
- return -EBUSY;
- oldmem_pfn_is_ram = fn;
- return 0;
-}
-EXPORT_SYMBOL_GPL(register_oldmem_pfn_is_ram);
-
-void unregister_oldmem_pfn_is_ram(void)
-{
- oldmem_pfn_is_ram = NULL;
- wmb();
-}
-EXPORT_SYMBOL_GPL(unregister_oldmem_pfn_is_ram);
-
-static int pfn_is_ram(unsigned long pfn)
-{
- int (*fn)(unsigned long pfn);
- /* pfn is ram unless fn() checks pagetype */
- int ret = 1;
-
- /*
- * Ask hypervisor if the pfn is really ram.
- * A ballooned page contains no data and reading from such a page
- * will cause high load in the hypervisor.
- */
- fn = oldmem_pfn_is_ram;
- if (fn)
- ret = fn(pfn);
-
- return ret;
-}
-
-/* Reads a page from the oldmem device from given offset. */
-static ssize_t read_from_oldmem(char *buf, size_t count,
- u64 *ppos, int userbuf)
-{
- unsigned long pfn, offset;
- size_t nr_bytes;
- ssize_t read = 0, tmp;
-
- if (!count)
- return 0;
-
- offset = (unsigned long)(*ppos % PAGE_SIZE);
- pfn = (unsigned long)(*ppos / PAGE_SIZE);
-
- do {
- if (count > (PAGE_SIZE - offset))
- nr_bytes = PAGE_SIZE - offset;
- else
- nr_bytes = count;
-
- /* If pfn is not ram, return zeros for sparse dump files */
- if (pfn_is_ram(pfn) == 0)
- memset(buf, 0, nr_bytes);
- else {
- tmp = copy_oldmem_page(pfn, buf, nr_bytes,
- offset, userbuf);
- if (tmp < 0)
- return tmp;
- }
- *ppos += nr_bytes;
- count -= nr_bytes;
- buf += nr_bytes;
- read += nr_bytes;
- ++pfn;
- offset = 0;
- } while (count);
-
- return read;
-}
-
-/* Maps vmcore file offset to respective physical address in memroy. */
-static u64 map_offset_to_paddr(loff_t offset, struct list_head *vc_list,
- struct vmcore **m_ptr)
-{
- struct vmcore *m;
- u64 paddr;
-
- list_for_each_entry(m, vc_list, list) {
- u64 start, end;
- start = m->offset;
- end = m->offset + m->size - 1;
- if (offset >= start && offset <= end) {
- paddr = m->paddr + offset - start;
- *m_ptr = m;
- return paddr;
- }
- }
- *m_ptr = NULL;
- return 0;
-}
-
-/* Read from the ELF header and then the crash dump. On error, negative value is
- * returned otherwise number of bytes read are returned.
- */
-static ssize_t read_vmcore(struct file *file, char __user *buffer,
- size_t buflen, loff_t *fpos)
-{
- ssize_t acc = 0, tmp;
- size_t tsz;
- u64 start, nr_bytes;
- struct vmcore *curr_m = NULL;
-
- if (buflen == 0 || *fpos >= vmcore_size)
- return 0;
-
- /* trim buflen to not go beyond EOF */
- if (buflen > vmcore_size - *fpos)
- buflen = vmcore_size - *fpos;
-
- /* Read ELF core header */
- if (*fpos < elfcorebuf_sz) {
- tsz = elfcorebuf_sz - *fpos;
- if (buflen < tsz)
- tsz = buflen;
- if (copy_to_user(buffer, elfcorebuf + *fpos, tsz))
- return -EFAULT;
- buflen -= tsz;
- *fpos += tsz;
- buffer += tsz;
- acc += tsz;
-
- /* leave now if filled buffer already */
- if (buflen == 0)
- return acc;
- }
-
- start = map_offset_to_paddr(*fpos, &vmcore_list, &curr_m);
- if (!curr_m)
- return -EINVAL;
- if ((tsz = (PAGE_SIZE - (start & ~PAGE_MASK))) > buflen)
- tsz = buflen;
-
- /* Calculate left bytes in current memory segment. */
- nr_bytes = (curr_m->size - (start - curr_m->paddr));
- if (tsz > nr_bytes)
- tsz = nr_bytes;
-
- while (buflen) {
- tmp = read_from_oldmem(buffer, tsz, &start, 1);
- if (tmp < 0)
- return tmp;
- buflen -= tsz;
- *fpos += tsz;
- buffer += tsz;
- acc += tsz;
- if (start >= (curr_m->paddr + curr_m->size)) {
- if (curr_m->list.next == &vmcore_list)
- return acc; /*EOF*/
- curr_m = list_entry(curr_m->list.next,
- struct vmcore, list);
- start = curr_m->paddr;
- }
- if ((tsz = (PAGE_SIZE - (start & ~PAGE_MASK))) > buflen)
- tsz = buflen;
- /* Calculate left bytes in current memory segment. */
- nr_bytes = (curr_m->size - (start - curr_m->paddr));
- if (tsz > nr_bytes)
- tsz = nr_bytes;
- }
- return acc;
-}
-
-static const struct file_operations proc_vmcore_operations = {
- .read = read_vmcore,
- .llseek = default_llseek,
-};
-
-static struct vmcore* __init get_new_element(void)
-{
- return kzalloc(sizeof(struct vmcore), GFP_KERNEL);
-}
-
-static u64 __init get_vmcore_size_elf64(char *elfptr)
-{
- int i;
- u64 size;
- Elf64_Ehdr *ehdr_ptr;
- Elf64_Phdr *phdr_ptr;
-
- ehdr_ptr = (Elf64_Ehdr *)elfptr;
- phdr_ptr = (Elf64_Phdr*)(elfptr + sizeof(Elf64_Ehdr));
- size = sizeof(Elf64_Ehdr) + ((ehdr_ptr->e_phnum) * sizeof(Elf64_Phdr));
- for (i = 0; i < ehdr_ptr->e_phnum; i++) {
- size += phdr_ptr->p_memsz;
- phdr_ptr++;
- }
- return size;
-}
-
-static u64 __init get_vmcore_size_elf32(char *elfptr)
-{
- int i;
- u64 size;
- Elf32_Ehdr *ehdr_ptr;
- Elf32_Phdr *phdr_ptr;
-
- ehdr_ptr = (Elf32_Ehdr *)elfptr;
- phdr_ptr = (Elf32_Phdr*)(elfptr + sizeof(Elf32_Ehdr));
- size = sizeof(Elf32_Ehdr) + ((ehdr_ptr->e_phnum) * sizeof(Elf32_Phdr));
- for (i = 0; i < ehdr_ptr->e_phnum; i++) {
- size += phdr_ptr->p_memsz;
- phdr_ptr++;
- }
- return size;
-}
-
-/* Merges all the PT_NOTE headers into one. */
-static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz,
- struct list_head *vc_list)
-{
- int i, nr_ptnote=0, rc=0;
- char *tmp;
- Elf64_Ehdr *ehdr_ptr;
- Elf64_Phdr phdr, *phdr_ptr;
- Elf64_Nhdr *nhdr_ptr;
- u64 phdr_sz = 0, note_off;
-
- ehdr_ptr = (Elf64_Ehdr *)elfptr;
- phdr_ptr = (Elf64_Phdr*)(elfptr + sizeof(Elf64_Ehdr));
- for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
- int j;
- void *notes_section;
- struct vmcore *new;
- u64 offset, max_sz, sz, real_sz = 0;
- if (phdr_ptr->p_type != PT_NOTE)
- continue;
- nr_ptnote++;
- max_sz = phdr_ptr->p_memsz;
- offset = phdr_ptr->p_offset;
- notes_section = kmalloc(max_sz, GFP_KERNEL);
- if (!notes_section)
- return -ENOMEM;
- rc = read_from_oldmem(notes_section, max_sz, &offset, 0);
- if (rc < 0) {
- kfree(notes_section);
- return rc;
- }
- nhdr_ptr = notes_section;
- for (j = 0; j < max_sz; j += sz) {
- if (nhdr_ptr->n_namesz == 0)
- break;
- sz = sizeof(Elf64_Nhdr) +
- ((nhdr_ptr->n_namesz + 3) & ~3) +
- ((nhdr_ptr->n_descsz + 3) & ~3);
- real_sz += sz;
- nhdr_ptr = (Elf64_Nhdr*)((char*)nhdr_ptr + sz);
- }
-
- /* Add this contiguous chunk of notes section to vmcore list.*/
- new = get_new_element();
- if (!new) {
- kfree(notes_section);
- return -ENOMEM;
- }
- new->paddr = phdr_ptr->p_offset;
- new->size = real_sz;
- list_add_tail(&new->list, vc_list);
- phdr_sz += real_sz;
- kfree(notes_section);
- }
-
- /* Prepare merged PT_NOTE program header. */
- phdr.p_type = PT_NOTE;
- phdr.p_flags = 0;
- note_off = sizeof(Elf64_Ehdr) +
- (ehdr_ptr->e_phnum - nr_ptnote +1) * sizeof(Elf64_Phdr);
- phdr.p_offset = note_off;
- phdr.p_vaddr = phdr.p_paddr = 0;
- phdr.p_filesz = phdr.p_memsz = phdr_sz;
- phdr.p_align = 0;
-
- /* Add merged PT_NOTE program header*/
- tmp = elfptr + sizeof(Elf64_Ehdr);
- memcpy(tmp, &phdr, sizeof(phdr));
- tmp += sizeof(phdr);
-
- /* Remove unwanted PT_NOTE program headers. */
- i = (nr_ptnote - 1) * sizeof(Elf64_Phdr);
- *elfsz = *elfsz - i;
- memmove(tmp, tmp+i, ((*elfsz)-sizeof(Elf64_Ehdr)-sizeof(Elf64_Phdr)));
-
- /* Modify e_phnum to reflect merged headers. */
- ehdr_ptr->e_phnum = ehdr_ptr->e_phnum - nr_ptnote + 1;
-
- return 0;
-}
-
-/* Merges all the PT_NOTE headers into one. */
-static int __init merge_note_headers_elf32(char *elfptr, size_t *elfsz,
- struct list_head *vc_list)
-{
- int i, nr_ptnote=0, rc=0;
- char *tmp;
- Elf32_Ehdr *ehdr_ptr;
- Elf32_Phdr phdr, *phdr_ptr;
- Elf32_Nhdr *nhdr_ptr;
- u64 phdr_sz = 0, note_off;
-
- ehdr_ptr = (Elf32_Ehdr *)elfptr;
- phdr_ptr = (Elf32_Phdr*)(elfptr + sizeof(Elf32_Ehdr));
- for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
- int j;
- void *notes_section;
- struct vmcore *new;
- u64 offset, max_sz, sz, real_sz = 0;
- if (phdr_ptr->p_type != PT_NOTE)
- continue;
- nr_ptnote++;
- max_sz = phdr_ptr->p_memsz;
- offset = phdr_ptr->p_offset;
- notes_section = kmalloc(max_sz, GFP_KERNEL);
- if (!notes_section)
- return -ENOMEM;
- rc = read_from_oldmem(notes_section, max_sz, &offset, 0);
- if (rc < 0) {
- kfree(notes_section);
- return rc;
- }
- nhdr_ptr = notes_section;
- for (j = 0; j < max_sz; j += sz) {
- if (nhdr_ptr->n_namesz == 0)
- break;
- sz = sizeof(Elf32_Nhdr) +
- ((nhdr_ptr->n_namesz + 3) & ~3) +
- ((nhdr_ptr->n_descsz + 3) & ~3);
- real_sz += sz;
- nhdr_ptr = (Elf32_Nhdr*)((char*)nhdr_ptr + sz);
- }
-
- /* Add this contiguous chunk of notes section to vmcore list.*/
- new = get_new_element();
- if (!new) {
- kfree(notes_section);
- return -ENOMEM;
- }
- new->paddr = phdr_ptr->p_offset;
- new->size = real_sz;
- list_add_tail(&new->list, vc_list);
- phdr_sz += real_sz;
- kfree(notes_section);
- }
-
- /* Prepare merged PT_NOTE program header. */
- phdr.p_type = PT_NOTE;
- phdr.p_flags = 0;
- note_off = sizeof(Elf32_Ehdr) +
- (ehdr_ptr->e_phnum - nr_ptnote +1) * sizeof(Elf32_Phdr);
- phdr.p_offset = note_off;
- phdr.p_vaddr = phdr.p_paddr = 0;
- phdr.p_filesz = phdr.p_memsz = phdr_sz;
- phdr.p_align = 0;
-
- /* Add merged PT_NOTE program header*/
- tmp = elfptr + sizeof(Elf32_Ehdr);
- memcpy(tmp, &phdr, sizeof(phdr));
- tmp += sizeof(phdr);
-
- /* Remove unwanted PT_NOTE program headers. */
- i = (nr_ptnote - 1) * sizeof(Elf32_Phdr);
- *elfsz = *elfsz - i;
- memmove(tmp, tmp+i, ((*elfsz)-sizeof(Elf32_Ehdr)-sizeof(Elf32_Phdr)));
-
- /* Modify e_phnum to reflect merged headers. */
- ehdr_ptr->e_phnum = ehdr_ptr->e_phnum - nr_ptnote + 1;
-
- return 0;
-}
-
-/* Add memory chunks represented by program headers to vmcore list. Also update
- * the new offset fields of exported program headers. */
-static int __init process_ptload_program_headers_elf64(char *elfptr,
- size_t elfsz,
- struct list_head *vc_list)
-{
- int i;
- Elf64_Ehdr *ehdr_ptr;
- Elf64_Phdr *phdr_ptr;
- loff_t vmcore_off;
- struct vmcore *new;
-
- ehdr_ptr = (Elf64_Ehdr *)elfptr;
- phdr_ptr = (Elf64_Phdr*)(elfptr + sizeof(Elf64_Ehdr)); /* PT_NOTE hdr */
-
- /* First program header is PT_NOTE header. */
- vmcore_off = sizeof(Elf64_Ehdr) +
- (ehdr_ptr->e_phnum) * sizeof(Elf64_Phdr) +
- phdr_ptr->p_memsz; /* Note sections */
-
- for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
- if (phdr_ptr->p_type != PT_LOAD)
- continue;
-
- /* Add this contiguous chunk of memory to vmcore list.*/
- new = get_new_element();
- if (!new)
- return -ENOMEM;
- new->paddr = phdr_ptr->p_offset;
- new->size = phdr_ptr->p_memsz;
- list_add_tail(&new->list, vc_list);
-
- /* Update the program header offset. */
- phdr_ptr->p_offset = vmcore_off;
- vmcore_off = vmcore_off + phdr_ptr->p_memsz;
- }
- return 0;
-}
-
-static int __init process_ptload_program_headers_elf32(char *elfptr,
- size_t elfsz,
- struct list_head *vc_list)
-{
- int i;
- Elf32_Ehdr *ehdr_ptr;
- Elf32_Phdr *phdr_ptr;
- loff_t vmcore_off;
- struct vmcore *new;
-
- ehdr_ptr = (Elf32_Ehdr *)elfptr;
- phdr_ptr = (Elf32_Phdr*)(elfptr + sizeof(Elf32_Ehdr)); /* PT_NOTE hdr */
-
- /* First program header is PT_NOTE header. */
- vmcore_off = sizeof(Elf32_Ehdr) +
- (ehdr_ptr->e_phnum) * sizeof(Elf32_Phdr) +
- phdr_ptr->p_memsz; /* Note sections */
-
- for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
- if (phdr_ptr->p_type != PT_LOAD)
- continue;
-
- /* Add this contiguous chunk of memory to vmcore list.*/
- new = get_new_element();
- if (!new)
- return -ENOMEM;
- new->paddr = phdr_ptr->p_offset;
- new->size = phdr_ptr->p_memsz;
- list_add_tail(&new->list, vc_list);
-
- /* Update the program header offset */
- phdr_ptr->p_offset = vmcore_off;
- vmcore_off = vmcore_off + phdr_ptr->p_memsz;
- }
- return 0;
-}
-
-/* Sets offset fields of vmcore elements. */
-static void __init set_vmcore_list_offsets_elf64(char *elfptr,
- struct list_head *vc_list)
-{
- loff_t vmcore_off;
- Elf64_Ehdr *ehdr_ptr;
- struct vmcore *m;
-
- ehdr_ptr = (Elf64_Ehdr *)elfptr;
-
- /* Skip Elf header and program headers. */
- vmcore_off = sizeof(Elf64_Ehdr) +
- (ehdr_ptr->e_phnum) * sizeof(Elf64_Phdr);
-
- list_for_each_entry(m, vc_list, list) {
- m->offset = vmcore_off;
- vmcore_off += m->size;
- }
-}
-
-/* Sets offset fields of vmcore elements. */
-static void __init set_vmcore_list_offsets_elf32(char *elfptr,
- struct list_head *vc_list)
-{
- loff_t vmcore_off;
- Elf32_Ehdr *ehdr_ptr;
- struct vmcore *m;
-
- ehdr_ptr = (Elf32_Ehdr *)elfptr;
-
- /* Skip Elf header and program headers. */
- vmcore_off = sizeof(Elf32_Ehdr) +
- (ehdr_ptr->e_phnum) * sizeof(Elf32_Phdr);
-
- list_for_each_entry(m, vc_list, list) {
- m->offset = vmcore_off;
- vmcore_off += m->size;
- }
-}
-
-static int __init parse_crash_elf64_headers(void)
-{
- int rc=0;
- Elf64_Ehdr ehdr;
- u64 addr;
-
- addr = elfcorehdr_addr;
-
- /* Read Elf header */
- rc = read_from_oldmem((char*)&ehdr, sizeof(Elf64_Ehdr), &addr, 0);
- if (rc < 0)
- return rc;
-
- /* Do some basic Verification. */
- if (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0 ||
- (ehdr.e_type != ET_CORE) ||
- !vmcore_elf64_check_arch(&ehdr) ||
- ehdr.e_ident[EI_CLASS] != ELFCLASS64 ||
- ehdr.e_ident[EI_VERSION] != EV_CURRENT ||
- ehdr.e_version != EV_CURRENT ||
- ehdr.e_ehsize != sizeof(Elf64_Ehdr) ||
- ehdr.e_phentsize != sizeof(Elf64_Phdr) ||
- ehdr.e_phnum == 0) {
- printk(KERN_WARNING "Warning: Core image elf header is not"
- "sane\n");
- return -EINVAL;
- }
-
- /* Read in all elf headers. */
- elfcorebuf_sz = sizeof(Elf64_Ehdr) + ehdr.e_phnum * sizeof(Elf64_Phdr);
- elfcorebuf = kmalloc(elfcorebuf_sz, GFP_KERNEL);
- if (!elfcorebuf)
- return -ENOMEM;
- addr = elfcorehdr_addr;
- rc = read_from_oldmem(elfcorebuf, elfcorebuf_sz, &addr, 0);
- if (rc < 0) {
- kfree(elfcorebuf);
- return rc;
- }
-
- /* Merge all PT_NOTE headers into one. */
- rc = merge_note_headers_elf64(elfcorebuf, &elfcorebuf_sz, &vmcore_list);
- if (rc) {
- kfree(elfcorebuf);
- return rc;
- }
- rc = process_ptload_program_headers_elf64(elfcorebuf, elfcorebuf_sz,
- &vmcore_list);
- if (rc) {
- kfree(elfcorebuf);
- return rc;
- }
- set_vmcore_list_offsets_elf64(elfcorebuf, &vmcore_list);
- return 0;
-}
-
-static int __init parse_crash_elf32_headers(void)
-{
- int rc=0;
- Elf32_Ehdr ehdr;
- u64 addr;
-
- addr = elfcorehdr_addr;
-
- /* Read Elf header */
- rc = read_from_oldmem((char*)&ehdr, sizeof(Elf32_Ehdr), &addr, 0);
- if (rc < 0)
- return rc;
-
- /* Do some basic Verification. */
- if (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0 ||
- (ehdr.e_type != ET_CORE) ||
- !elf_check_arch(&ehdr) ||
- ehdr.e_ident[EI_CLASS] != ELFCLASS32||
- ehdr.e_ident[EI_VERSION] != EV_CURRENT ||
- ehdr.e_version != EV_CURRENT ||
- ehdr.e_ehsize != sizeof(Elf32_Ehdr) ||
- ehdr.e_phentsize != sizeof(Elf32_Phdr) ||
- ehdr.e_phnum == 0) {
- printk(KERN_WARNING "Warning: Core image elf header is not"
- "sane\n");
- return -EINVAL;
- }
-
- /* Read in all elf headers. */
- elfcorebuf_sz = sizeof(Elf32_Ehdr) + ehdr.e_phnum * sizeof(Elf32_Phdr);
- elfcorebuf = kmalloc(elfcorebuf_sz, GFP_KERNEL);
- if (!elfcorebuf)
- return -ENOMEM;
- addr = elfcorehdr_addr;
- rc = read_from_oldmem(elfcorebuf, elfcorebuf_sz, &addr, 0);
- if (rc < 0) {
- kfree(elfcorebuf);
- return rc;
- }
-
- /* Merge all PT_NOTE headers into one. */
- rc = merge_note_headers_elf32(elfcorebuf, &elfcorebuf_sz, &vmcore_list);
- if (rc) {
- kfree(elfcorebuf);
- return rc;
- }
- rc = process_ptload_program_headers_elf32(elfcorebuf, elfcorebuf_sz,
- &vmcore_list);
- if (rc) {
- kfree(elfcorebuf);
- return rc;
- }
- set_vmcore_list_offsets_elf32(elfcorebuf, &vmcore_list);
- return 0;
-}
-
-static int __init parse_crash_elf_headers(void)
-{
- unsigned char e_ident[EI_NIDENT];
- u64 addr;
- int rc=0;
-
- addr = elfcorehdr_addr;
- rc = read_from_oldmem(e_ident, EI_NIDENT, &addr, 0);
- if (rc < 0)
- return rc;
- if (memcmp(e_ident, ELFMAG, SELFMAG) != 0) {
- printk(KERN_WARNING "Warning: Core image elf header"
- " not found\n");
- return -EINVAL;
- }
-
- if (e_ident[EI_CLASS] == ELFCLASS64) {
- rc = parse_crash_elf64_headers();
- if (rc)
- return rc;
-
- /* Determine vmcore size. */
- vmcore_size = get_vmcore_size_elf64(elfcorebuf);
- } else if (e_ident[EI_CLASS] == ELFCLASS32) {
- rc = parse_crash_elf32_headers();
- if (rc)
- return rc;
-
- /* Determine vmcore size. */
- vmcore_size = get_vmcore_size_elf32(elfcorebuf);
- } else {
- printk(KERN_WARNING "Warning: Core image elf header is not"
- " sane\n");
- return -EINVAL;
- }
- return 0;
-}
-
-/* Init function for vmcore module. */
-static int __init vmcore_init(void)
-{
- int rc = 0;
-
- /* If elfcorehdr= has been passed in cmdline, then capture the dump.*/
- if (!(is_vmcore_usable()))
- return rc;
- rc = parse_crash_elf_headers();
- if (rc) {
- printk(KERN_WARNING "Kdump: vmcore not initialized\n");
- return rc;
- }
-
- proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
- if (proc_vmcore)
- proc_vmcore->size = vmcore_size;
- return 0;
-}
-module_init(vmcore_init)
-
-/* Cleanup function for vmcore module. */
-void vmcore_cleanup(void)
-{
- struct list_head *pos, *next;
-
- if (proc_vmcore) {
- remove_proc_entry(proc_vmcore->name, proc_vmcore->parent);
- proc_vmcore = NULL;
- }
-
- /* clear the vmcore list. */
- list_for_each_safe(pos, next, &vmcore_list) {
- struct vmcore *m;
-
- m = list_entry(pos, struct vmcore, list);
- list_del(&m->list);
- kfree(m);
- }
- kfree(elfcorebuf);
- elfcorebuf = NULL;
-}
-EXPORT_SYMBOL_GPL(vmcore_cleanup);