Signed-off-by: Antony Pavlov <antonynpav...@gmail.com>
---
commands/Kconfig | 7 +
common/Kconfig | 3 +
common/filetype.c | 5 +
include/filetype.h | 1 +
lib/Makefile | 1 +
lib/kexec/Makefile | 1 +
lib/kexec/kexec-elf-exec.c | 85 ++++
lib/kexec/kexec-elf.c | 927 ++++++++++++++++++++++++++++++++++++++++++++
lib/kexec/kexec-elf.h | 110 ++++++
lib/kexec/kexec.c | 251 ++++++++++++
lib/kexec/kexec.h | 117 ++++++
11 files changed, 1508 insertions(+)
create mode 100644 lib/kexec/Makefile
create mode 100644 lib/kexec/kexec-elf-exec.c
create mode 100644 lib/kexec/kexec-elf.c
create mode 100644 lib/kexec/kexec-elf.h
create mode 100644 lib/kexec/kexec.c
create mode 100644 lib/kexec/kexec.h
diff --git a/commands/Kconfig b/commands/Kconfig
index 75ebfb8..aef4ecb 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -403,6 +403,13 @@ config CMD_BOOTM_AIMAGE
help
Support using Android Images.
+config KEXEC
+ bool
+ prompt "bootm ELF image support"
+ depends on CMD_BOOTM && HAS_KEXEC
+ help
+ Support using ELF Images.
+
config CMD_UIMAGE
select UIMAGE
tristate
diff --git a/common/Kconfig b/common/Kconfig
index b60b78b..84cfc70 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -674,3 +674,6 @@ endmenu
config HAS_DEBUG_LL
bool
+
+config HAS_KEXEC
+ bool
diff --git a/common/filetype.c b/common/filetype.c
index 748e364..1bb9cac 100644
--- a/common/filetype.c
+++ b/common/filetype.c
@@ -23,6 +23,7 @@
#include <fs.h>
#include <malloc.h>
#include <errno.h>
+#include <elf.h>
struct filetype_str {
const char *name; /* human readable filetype */
@@ -48,6 +49,7 @@ static const struct filetype_str filetype_str[] = {
[filetype_bmp] = { "BMP image", "bmp" },
[filetype_png] = { "PNG image", "png" },
[filetype_ext] = { "ext filesystem", "ext" },
+ [filetype_elf] = { "ELF", "elf" },
};
const char *file_type_to_string(enum filetype f)
@@ -169,6 +171,9 @@ enum filetype file_detect_type(void *_buf, size_t bufsize)
if (buf16[512 + 28] == le16_to_cpu(0xef53))
return filetype_ext;
+ if (strncmp(buf8, ELFMAG, 4) == 0)
+ return filetype_elf;
+
return filetype_unknown;
}
diff --git a/include/filetype.h b/include/filetype.h
index 91139db..d7c9c03 100644
--- a/include/filetype.h
+++ b/include/filetype.h
@@ -23,6 +23,7 @@ enum filetype {
filetype_bmp,
filetype_png,
filetype_ext,
+ filetype_elf,
filetype_max,
};
diff --git a/lib/Makefile b/lib/Makefile
index 635d52e..10465ee 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -37,3 +37,4 @@ obj-$(CONFIG_QSORT) += qsort.o
obj-y += gui/
obj-$(CONFIG_XYMODEM) += xymodem.o
obj-y += unlink-recursive.o
+obj-$(CONFIG_KEXEC) += kexec/
diff --git a/lib/kexec/Makefile b/lib/kexec/Makefile
new file mode 100644
index 0000000..6d84858
--- /dev/null
+++ b/lib/kexec/Makefile
@@ -0,0 +1 @@
+obj-y += kexec-elf-exec.o kexec-elf.o kexec.o
diff --git a/lib/kexec/kexec-elf-exec.c b/lib/kexec/kexec-elf-exec.c
new file mode 100644
index 0000000..39c55be
--- /dev/null
+++ b/lib/kexec/kexec-elf-exec.c
@@ -0,0 +1,85 @@
+#include <linux/types.h>
+#include <common.h>
+
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <memory.h>
+#include <elf.h>
+#include "kexec.h"
+#include "kexec-elf.h"
+
+int build_elf_exec_info(const char *buf, off_t len, struct mem_ehdr *ehdr,
+ uint32_t flags)
+{
+ struct mem_phdr *phdr, *end_phdr;
+ int result;
+
+ result = build_elf_info(buf, len, ehdr, flags);
+ if (result < 0) {
+ return result;
+ }
+
+ if (ehdr->e_type != ET_EXEC) {
+ printf("Not ELF type ET_EXEC\n");
+ return -1;
+ }
+
+ if (!ehdr->e_phdr) {
+ printf("No ELF program header\n");
+ return -1;
+ }
+
+ end_phdr = &ehdr->e_phdr[ehdr->e_phnum];
+ for (phdr = ehdr->e_phdr; phdr != end_phdr; phdr++) {
+ /* Kexec does not support loading interpreters.
+ * In addition this check keeps us from attempting
+ * to kexec ordinay executables.
+ */
+ if (phdr->p_type == PT_INTERP) {
+ printf("Requires an ELF interpreter\n");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+int elf_exec_load(struct mem_ehdr *ehdr, struct kexec_info *info)
+{
+ int result;
+ size_t i;
+
+ if (!ehdr->e_phdr) {
+ printf("No program header?\n");
+ result = -1;
+ goto out;
+ }
+
+ /* Read in the PT_LOAD segments */
+ for (i = 0; i < ehdr->e_phnum; i++) {
+ struct mem_phdr *phdr;
+ size_t size;
+
+ phdr = &ehdr->e_phdr[i];
+
+ if (phdr->p_type != PT_LOAD) {
+ continue;
+ }
+
+ size = phdr->p_filesz;
+
+ if (size > phdr->p_memsz) {
+ size = phdr->p_memsz;
+ }
+
+ add_segment(info,
+ phdr->p_data, size,
+ phdr->p_paddr, phdr->p_memsz);
+ }
+
+ result = 0;
+ out:
+ return result;
+}
diff --git a/lib/kexec/kexec-elf.c b/lib/kexec/kexec-elf.c
new file mode 100644
index 0000000..975d85f
--- /dev/null
+++ b/lib/kexec/kexec-elf.c
@@ -0,0 +1,927 @@
+#include <linux/types.h>
+#include <common.h>
+
+/* FIXME: virt_to_phys() */
+#include <asm/io.h>
+/* FIXME: need UINT64_MAX */
+//#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <malloc.h>
+#include <memory.h>
+#include "elf.h"
+#include "kexec.h"
+#include "kexec-elf.h"
+
+uint16_t elf16_to_cpu(const struct mem_ehdr *ehdr, uint16_t value)
+{
+ if (ehdr->ei_data == ELFDATA2LSB) {
+ value = le16_to_cpu(value);
+ } else if (ehdr->ei_data == ELFDATA2MSB) {
+ value = be16_to_cpu(value);
+ }
+
+ return value;
+}
+
+uint32_t elf32_to_cpu(const struct mem_ehdr *ehdr, uint32_t value)
+{
+ if (ehdr->ei_data == ELFDATA2LSB) {
+ value = le32_to_cpu(value);
+ } else if (ehdr->ei_data == ELFDATA2MSB) {
+ value = be32_to_cpu(value);
+ }
+
+ return value;
+}
+
+uint64_t elf64_to_cpu(const struct mem_ehdr *ehdr, uint64_t value)
+{
+ if (ehdr->ei_data == ELFDATA2LSB) {
+ value = le64_to_cpu(value);
+ } else if (ehdr->ei_data == ELFDATA2MSB) {
+ value = be64_to_cpu(value);
+ }
+
+ return value;
+}
+
+uint16_t cpu_to_elf16(const struct mem_ehdr *ehdr, uint16_t value)
+{
+ if (ehdr->ei_data == ELFDATA2LSB) {
+ value = cpu_to_le16(value);
+ } else if (ehdr->ei_data == ELFDATA2MSB) {
+ value = cpu_to_be16(value);
+ }
+
+ return value;
+}
+
+uint32_t cpu_to_elf32(const struct mem_ehdr *ehdr, uint32_t value)
+{
+ if (ehdr->ei_data == ELFDATA2LSB) {
+ value = cpu_to_le32(value);
+ } else if (ehdr->ei_data == ELFDATA2MSB) {
+ value = cpu_to_be32(value);
+ }
+
+ return value;
+}
+
+uint64_t cpu_to_elf64(const struct mem_ehdr *ehdr, uint64_t value)
+{
+ if (ehdr->ei_data == ELFDATA2LSB) {
+ value = cpu_to_le64(value);
+ } else if (ehdr->ei_data == ELFDATA2MSB) {
+ value = cpu_to_be64(value);
+ }
+
+ return value;
+}
+
+#define ELF32_MAX 0xffffffff
+#define ELF64_MAX 0xffffffffffffffff
+#if ELF64_MAX > ULONG_MAX
+#undef ELF64_MAX
+#define ELF64_MAX ULONG_MAX
+#endif
+
+unsigned long elf_max_addr(const struct mem_ehdr *ehdr)
+{
+ unsigned long max_addr = 0;
+
+ if (ehdr->ei_class == ELFCLASS32) {
+ max_addr = ELF32_MAX;
+ } else if (ehdr->ei_class == ELFCLASS64) {
+ max_addr = ELF64_MAX;
+ }
+
+ return max_addr;
+}
+
+static int build_mem_elf32_ehdr(const char *buf, off_t len, struct mem_ehdr
*ehdr)
+{
+ Elf32_Ehdr lehdr;
+
+ if ((size_t)len < sizeof(lehdr)) {
+ printf("Buffer is too small to hold ELF header\n");
+ return -1;
+ }
+
+ memcpy(&lehdr, buf, sizeof(lehdr));
+ if (elf16_to_cpu(ehdr, lehdr.e_ehsize) != sizeof(Elf32_Ehdr)) {
+ printf("Bad ELF header size\n");
+ return -1;
+ }
+
+ if (elf32_to_cpu(ehdr, lehdr.e_entry) > UINT32_MAX) {
+ printf("ELF e_entry is too large\n");
+ return -1;
+ }
+
+ if (elf32_to_cpu(ehdr, lehdr.e_phoff) > UINT32_MAX) {
+ printf("ELF e_phoff is too large\n");
+ return -1;
+ }
+
+ if (elf32_to_cpu(ehdr, lehdr.e_shoff) > UINT32_MAX) {
+ printf("ELF e_shoff is too large\n");
+ return -1;
+ }
+
+ ehdr->e_type = elf16_to_cpu(ehdr, lehdr.e_type);
+ ehdr->e_machine = elf16_to_cpu(ehdr, lehdr.e_machine);
+ ehdr->e_version = elf32_to_cpu(ehdr, lehdr.e_version);
+ ehdr->e_entry = elf32_to_cpu(ehdr, lehdr.e_entry);
+ ehdr->e_phoff = elf32_to_cpu(ehdr, lehdr.e_phoff);
+ ehdr->e_shoff = elf32_to_cpu(ehdr, lehdr.e_shoff);
+ ehdr->e_flags = elf32_to_cpu(ehdr, lehdr.e_flags);
+ ehdr->e_phnum = elf16_to_cpu(ehdr, lehdr.e_phnum);
+ ehdr->e_shnum = elf16_to_cpu(ehdr, lehdr.e_shnum);
+ ehdr->e_shstrndx = elf16_to_cpu(ehdr, lehdr.e_shstrndx);
+
+ if ((ehdr->e_phnum > 0) &&
+ (elf16_to_cpu(ehdr, lehdr.e_phentsize) != sizeof(Elf32_Phdr)))
+ {
+ printf("ELF bad program header size\n");
+ return -1;
+ }
+
+ if ((ehdr->e_shnum > 0) &&
+ (elf16_to_cpu(ehdr, lehdr.e_shentsize) != sizeof(Elf32_Shdr)))
+ {
+ printf("ELF bad section header size\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int build_mem_elf64_ehdr(const char *buf, off_t len, struct mem_ehdr
*ehdr)
+{
+ Elf64_Ehdr lehdr;
+
+ if ((size_t)len < sizeof(lehdr)) {
+ printf("Buffer is too small to hold ELF header\n");
+
+ return -1;
+ }
+
+ memcpy(&lehdr, buf, sizeof(lehdr));
+ if (elf16_to_cpu(ehdr, lehdr.e_ehsize) != sizeof(Elf64_Ehdr)) {
+ printf("Bad ELF header size\n");
+ return -1;
+ }
+
+ if (elf32_to_cpu(ehdr, lehdr.e_entry) > UINT32_MAX) {
+ printf("ELF e_entry is too large\n");
+ return -1;
+ }
+
+ if (elf32_to_cpu(ehdr, lehdr.e_phoff) > UINT32_MAX) {
+ printf("ELF e_phoff is too large\n");
+ return -1;
+ }
+
+ if (elf32_to_cpu(ehdr, lehdr.e_shoff) > UINT32_MAX) {
+ printf("ELF e_shoff is too large\n");
+ return -1;
+ }
+
+ ehdr->e_type = elf16_to_cpu(ehdr, lehdr.e_type);
+ ehdr->e_machine = elf16_to_cpu(ehdr, lehdr.e_machine);
+ ehdr->e_version = elf32_to_cpu(ehdr, lehdr.e_version);
+ ehdr->e_entry = elf64_to_cpu(ehdr, lehdr.e_entry);
+ ehdr->e_phoff = elf64_to_cpu(ehdr, lehdr.e_phoff);
+ ehdr->e_shoff = elf64_to_cpu(ehdr, lehdr.e_shoff);
+ ehdr->e_flags = elf32_to_cpu(ehdr, lehdr.e_flags);
+ ehdr->e_phnum = elf16_to_cpu(ehdr, lehdr.e_phnum);
+ ehdr->e_shnum = elf16_to_cpu(ehdr, lehdr.e_shnum);
+ ehdr->e_shstrndx = elf16_to_cpu(ehdr, lehdr.e_shstrndx);
+
+ if ((ehdr->e_phnum > 0) &&
+ (elf16_to_cpu(ehdr, lehdr.e_phentsize) != sizeof(Elf64_Phdr)))
+ {
+ /* Invalid program header size */
+ printf("ELF bad program header size\n");
+ return -1;
+ }
+
+ if ((ehdr->e_shnum > 0) &&
+ (elf16_to_cpu(ehdr, lehdr.e_shentsize) != sizeof(Elf64_Shdr)))
+ {
+ printf("Bad ELF section header size\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int build_mem_ehdr(const char *buf, off_t len, struct mem_ehdr *ehdr)
+{
+ unsigned char e_ident[EI_NIDENT];
+ int result;
+
+ memset(ehdr, 0, sizeof(*ehdr));
+
+ if ((size_t)len < sizeof(e_ident)) {
+ printf("Buffer is too small to hold ELF e_ident\n");
+
+ return -1;
+ }
+
+ memcpy(e_ident, buf, sizeof(e_ident));
+
+ ehdr->ei_class = e_ident[EI_CLASS];
+ ehdr->ei_data = e_ident[EI_DATA];
+ if ( (ehdr->ei_class != ELFCLASS32) &&
+ (ehdr->ei_class != ELFCLASS64))
+ {
+ printf("Not a supported ELF class\n");
+ return -1;
+ }
+
+ if ( (ehdr->ei_data != ELFDATA2LSB) &&
+ (ehdr->ei_data != ELFDATA2MSB))
+ {
+ printf("Not a supported ELF data format\n");
+ return -1;
+ }
+
+ result = -1;
+ if (ehdr->ei_class == ELFCLASS32) {
+ result = build_mem_elf32_ehdr(buf, len, ehdr);
+ } else if (ehdr->ei_class == ELFCLASS64) {
+ result = build_mem_elf64_ehdr(buf, len, ehdr);
+ }
+
+ if (result < 0) {
+ return result;
+ }
+
+ if ((e_ident[EI_VERSION] != EV_CURRENT) ||
+ (ehdr->e_version != EV_CURRENT))
+ {
+ printf("Unknown ELF version\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int build_mem_elf32_phdr(const char *buf, struct mem_ehdr *ehdr, int
idx)
+{
+ struct mem_phdr *phdr;
+ const char *pbuf;
+ Elf32_Phdr lphdr;
+
+ pbuf = buf + ehdr->e_phoff + (idx * sizeof(lphdr));
+ phdr = &ehdr->e_phdr[idx];
+ memcpy(&lphdr, pbuf, sizeof(lphdr));
+
+ if ( (elf32_to_cpu(ehdr, lphdr.p_filesz) > UINT32_MAX) ||
+ (elf32_to_cpu(ehdr, lphdr.p_memsz) > UINT32_MAX) ||
+ (elf32_to_cpu(ehdr, lphdr.p_offset) > UINT32_MAX) ||
+ (elf32_to_cpu(ehdr, lphdr.p_paddr) > UINT32_MAX) ||
+ (elf32_to_cpu(ehdr, lphdr.p_vaddr) > UINT32_MAX) ||
+ (elf32_to_cpu(ehdr, lphdr.p_align) > UINT32_MAX))
+ {
+ printf("Program segment size out of range\n");
+ return -1;
+ }
+
+ phdr->p_type = elf32_to_cpu(ehdr, lphdr.p_type);
+ phdr->p_paddr = elf32_to_cpu(ehdr, lphdr.p_paddr);
+ phdr->p_vaddr = elf32_to_cpu(ehdr, lphdr.p_vaddr);
+ phdr->p_filesz = elf32_to_cpu(ehdr, lphdr.p_filesz);
+ phdr->p_memsz = elf32_to_cpu(ehdr, lphdr.p_memsz);
+ phdr->p_offset = elf32_to_cpu(ehdr, lphdr.p_offset);
+ phdr->p_flags = elf32_to_cpu(ehdr, lphdr.p_flags);
+ phdr->p_align = elf32_to_cpu(ehdr, lphdr.p_align);
+
+ return 0;
+}
+
+static int build_mem_elf64_phdr(const char *buf, struct mem_ehdr *ehdr, int
idx)
+{
+ struct mem_phdr *phdr;
+ const char *pbuf;
+ Elf64_Phdr lphdr;
+
+ pbuf = buf + ehdr->e_phoff + (idx * sizeof(lphdr));
+ phdr = &ehdr->e_phdr[idx];
+ memcpy(&lphdr, pbuf, sizeof(lphdr));
+
+#if 0
+ if ( (elf64_to_cpu(ehdr, lphdr.p_filesz) > UINT64_MAX) ||
+ (elf64_to_cpu(ehdr, lphdr.p_memsz) > UINT64_MAX) ||
+ (elf64_to_cpu(ehdr, lphdr.p_offset) > UINT64_MAX) ||
+ (elf64_to_cpu(ehdr, lphdr.p_paddr) > UINT64_MAX) ||
+ (elf64_to_cpu(ehdr, lphdr.p_vaddr) > UINT64_MAX) ||
+ (elf64_to_cpu(ehdr, lphdr.p_align) > UINT64_MAX))
+ {
+ printf("Program segment size out of range\n");
+ return -1;
+ }
+#endif
+
+ phdr->p_type = elf32_to_cpu(ehdr, lphdr.p_type);
+ phdr->p_paddr = elf64_to_cpu(ehdr, lphdr.p_paddr);
+ phdr->p_vaddr = elf64_to_cpu(ehdr, lphdr.p_vaddr);
+ phdr->p_filesz = elf64_to_cpu(ehdr, lphdr.p_filesz);
+ phdr->p_memsz = elf64_to_cpu(ehdr, lphdr.p_memsz);
+ phdr->p_offset = elf64_to_cpu(ehdr, lphdr.p_offset);
+ phdr->p_flags = elf32_to_cpu(ehdr, lphdr.p_flags);
+ phdr->p_align = elf64_to_cpu(ehdr, lphdr.p_align);
+
+ return 0;
+}
+
+static int build_mem_phdrs(const char *buf, off_t len, struct mem_ehdr *ehdr,
+ uint32_t flags)
+{
+ size_t phdr_size, mem_phdr_size, i;
+
+ /* e_phnum is at most 65535 so calculating
+ * the size of the program header cannot overflow.
+ */
+ /* Is the program header in the file buffer? */
+ phdr_size = 0;
+ if (ehdr->ei_class == ELFCLASS32) {
+ phdr_size = sizeof(Elf32_Phdr);
+ } else if (ehdr->ei_class == ELFCLASS64) {
+ phdr_size = sizeof(Elf64_Phdr);
+ } else {
+ printf("Invalid ei_class?\n");
+ return -1;
+ }
+ phdr_size *= ehdr->e_phnum;
+
+#if 0
+ if ((uintmax_t)(ehdr->e_phoff + phdr_size) > (uintmax_t)len) {
+ /* The program header did not fit in the file buffer */
+ printf("ELF program headers truncated"
+ " have %ju bytes need %ju bytes\n",
+ (uintmax_t)len,
+ (uintmax_t)(ehdr->e_phoff + phdr_size));
+ return -1;
+ }
+#endif
+
+ /* Allocate the e_phdr array */
+ mem_phdr_size = sizeof(ehdr->e_phdr[0]) * ehdr->e_phnum;
+ ehdr->e_phdr = xmalloc(mem_phdr_size);
+
+ for (i = 0; i < ehdr->e_phnum; i++) {
+ struct mem_phdr *phdr;
+ int result;
+
+ result = -1;
+ if (ehdr->ei_class == ELFCLASS32) {
+ result = build_mem_elf32_phdr(buf, ehdr, i);
+
+ } else if (ehdr->ei_class == ELFCLASS64) {
+ result = build_mem_elf64_phdr(buf, ehdr, i);
+ }
+
+ if (result < 0) {
+ return result;
+ }
+
+ /* Check the program headers to be certain
+ * they are safe to use.
+ * Skip the check if ELF_SKIP_FILESZ_CHECK is set.
+ */
+ phdr = &ehdr->e_phdr[i];
+#if 0
+ if (!(flags & ELF_SKIP_FILESZ_CHECK)
+ && (uintmax_t)(phdr->p_offset + phdr->p_filesz) >
+ (uintmax_t)len) {
+ /* The segment does not fit in the buffer */
+ printf("ELF segment not in file\n");
+ return -1;
+ }
+#endif
+ if ((phdr->p_paddr + phdr->p_memsz) < phdr->p_paddr) {
+ /* The memory address wraps */
+ printf("ELF address wrap around\n");
+ return -1;
+ }
+
+ /* Remember where the segment lives in the buffer */
+ phdr->p_data = buf + phdr->p_offset;
+ }
+
+ return 0;
+}
+
+static int build_mem_elf32_shdr(const char *buf, struct mem_ehdr *ehdr, int
idx)
+{
+ struct mem_shdr *shdr;
+ const char *sbuf;
+ int size_ok;
+ Elf32_Shdr lshdr;
+
+ sbuf = buf + ehdr->e_shoff + (idx * sizeof(lshdr));
+ shdr = &ehdr->e_shdr[idx];
+ memcpy(&lshdr, sbuf, sizeof(lshdr));
+
+ if ( (elf32_to_cpu(ehdr, lshdr.sh_flags) > UINT32_MAX) ||
+ (elf32_to_cpu(ehdr, lshdr.sh_addr) > UINT32_MAX) ||
+ (elf32_to_cpu(ehdr, lshdr.sh_offset) > UINT32_MAX) ||
+ (elf32_to_cpu(ehdr, lshdr.sh_size) > UINT32_MAX) ||
+ (elf32_to_cpu(ehdr, lshdr.sh_addralign) > UINT32_MAX) ||
+ (elf32_to_cpu(ehdr, lshdr.sh_entsize) > UINT32_MAX))
+ {
+ printf("Program section size out of range\n");
+ return -1;
+ }
+
+ shdr->sh_name = elf32_to_cpu(ehdr, lshdr.sh_name);
+ shdr->sh_type = elf32_to_cpu(ehdr, lshdr.sh_type);
+ shdr->sh_flags = elf32_to_cpu(ehdr, lshdr.sh_flags);
+ shdr->sh_addr = elf32_to_cpu(ehdr, lshdr.sh_addr);
+ shdr->sh_offset = elf32_to_cpu(ehdr, lshdr.sh_offset);
+ shdr->sh_size = elf32_to_cpu(ehdr, lshdr.sh_size);
+ shdr->sh_link = elf32_to_cpu(ehdr, lshdr.sh_link);
+ shdr->sh_info = elf32_to_cpu(ehdr, lshdr.sh_info);
+ shdr->sh_addralign = elf32_to_cpu(ehdr, lshdr.sh_addralign);
+ shdr->sh_entsize = elf32_to_cpu(ehdr, lshdr.sh_entsize);
+
+ /* Now verify sh_entsize */
+ size_ok = 0;
+ switch(shdr->sh_type) {
+ case SHT_SYMTAB:
+ size_ok = shdr->sh_entsize == sizeof(Elf32_Sym);
+ break;
+ case SHT_RELA:
+ size_ok = shdr->sh_entsize == sizeof(Elf32_Rela);
+ break;
+ case SHT_DYNAMIC:
+ size_ok = shdr->sh_entsize == sizeof(Elf32_Dyn);
+ break;
+ case SHT_REL:
+ size_ok = shdr->sh_entsize == sizeof(Elf32_Rel);
+ break;
+ case SHT_NOTE:
+ case SHT_NULL:
+ case SHT_PROGBITS:
+ case SHT_HASH:
+ case SHT_NOBITS:
+ default:
+ /* This is a section whose entsize requirements
+ * I don't care about. If I don't know about
+ * the section I can't care about it's entsize
+ * requirements.
+ */
+ size_ok = 1;
+ break;
+ }
+
+ if (!size_ok) {
+ printf("Bad section header(%x) entsize: %lld\n",
+ shdr->sh_type, shdr->sh_entsize);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int build_mem_elf64_shdr(const char *buf, struct mem_ehdr *ehdr, int
idx)
+{
+ struct mem_shdr *shdr;
+ const char *sbuf;
+ int size_ok;
+ Elf64_Shdr lshdr;
+
+ sbuf = buf + ehdr->e_shoff + (idx * sizeof(lshdr));
+ shdr = &ehdr->e_shdr[idx];
+ memcpy(&lshdr, sbuf, sizeof(lshdr));
+
+#if 0
+ if ( (elf64_to_cpu(ehdr, lshdr.sh_flags) > UINT64_MAX) ||
+ (elf64_to_cpu(ehdr, lshdr.sh_addr) > UINT64_MAX) ||
+ (elf64_to_cpu(ehdr, lshdr.sh_offset) > UINT64_MAX) ||
+ (elf64_to_cpu(ehdr, lshdr.sh_size) > UINT64_MAX) ||
+ (elf64_to_cpu(ehdr, lshdr.sh_addralign) > UINT64_MAX) ||
+ (elf64_to_cpu(ehdr, lshdr.sh_entsize) > UINT64_MAX))
+ {
+ printf("Program section size out of range\n");
+ return -1;
+ }
+#endif
+
+ shdr->sh_name = elf32_to_cpu(ehdr, lshdr.sh_name);
+ shdr->sh_type = elf32_to_cpu(ehdr, lshdr.sh_type);
+ shdr->sh_flags = elf64_to_cpu(ehdr, lshdr.sh_flags);
+ shdr->sh_addr = elf64_to_cpu(ehdr, lshdr.sh_addr);
+ shdr->sh_offset = elf64_to_cpu(ehdr, lshdr.sh_offset);
+ shdr->sh_size = elf64_to_cpu(ehdr, lshdr.sh_size);
+ shdr->sh_link = elf32_to_cpu(ehdr, lshdr.sh_link);
+ shdr->sh_info = elf32_to_cpu(ehdr, lshdr.sh_info);
+ shdr->sh_addralign = elf64_to_cpu(ehdr, lshdr.sh_addralign);
+ shdr->sh_entsize = elf64_to_cpu(ehdr, lshdr.sh_entsize);
+
+ /* Now verify sh_entsize */
+ size_ok = 0;
+ switch(shdr->sh_type) {
+ case SHT_SYMTAB:
+ size_ok = shdr->sh_entsize == sizeof(Elf64_Sym);
+ break;
+ case SHT_RELA:
+ size_ok = shdr->sh_entsize == sizeof(Elf64_Rela);
+ break;
+ case SHT_DYNAMIC:
+ size_ok = shdr->sh_entsize == sizeof(Elf64_Dyn);
+ break;
+ case SHT_REL:
+ size_ok = shdr->sh_entsize == sizeof(Elf64_Rel);
+ break;
+ case SHT_NOTE:
+ case SHT_NULL:
+ case SHT_PROGBITS:
+ case SHT_HASH:
+ case SHT_NOBITS:
+ default:
+ /* This is a section whose entsize requirements
+ * I don't care about. If I don't know about
+ * the section I can't care about it's entsize
+ * requirements.
+ */
+ size_ok = 1;
+ break;
+ }
+
+ if (!size_ok) {
+ printf("Bad section header(%x) entsize: %lld\n",
+ shdr->sh_type, shdr->sh_entsize);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int build_mem_shdrs(const char *buf, off_t len, struct mem_ehdr *ehdr,
+ uint32_t flags)
+{
+ size_t shdr_size, mem_shdr_size, i;
+
+ /* e_shnum is at most 65536 so calculating
+ * the size of the section header cannot overflow.
+ */
+ /* Is the program header in the file buffer? */
+ shdr_size = 0;
+ if (ehdr->ei_class == ELFCLASS32) {
+ shdr_size = sizeof(Elf32_Shdr);
+ } else if (ehdr->ei_class == ELFCLASS64) {
+ shdr_size = sizeof(Elf64_Shdr);
+ } else {
+ printf("Invalid ei_class?\n");
+ return -1;
+ }
+ shdr_size *= ehdr->e_shnum;
+#if 0
+ if ((uintmax_t)(ehdr->e_shoff + shdr_size) > (uintmax_t)len) {
+ /* The section header did not fit in the file buffer */
+ printf("ELF section header does not fit in file\n");
+ return -1;
+ }
+#endif
+
+ /* Allocate the e_shdr array */
+ mem_shdr_size = sizeof(ehdr->e_shdr[0]) * ehdr->e_shnum;
+ ehdr->e_shdr = xmalloc(mem_shdr_size);
+
+ for (i = 0; i < ehdr->e_shnum; i++) {
+ struct mem_shdr *shdr;
+ int result;
+
+ result = -1;
+ if (ehdr->ei_class == ELFCLASS32) {
+ result = build_mem_elf32_shdr(buf, ehdr, i);
+ } else if (ehdr->ei_class == ELFCLASS64) {
+ result = build_mem_elf64_shdr(buf, ehdr, i);
+ }
+
+ if (result < 0) {
+ return result;
+ }
+
+ /* Check the section headers to be certain
+ * they are safe to use.
+ * Skip the check if ELF_SKIP_FILESZ_CHECK is set.
+ */
+ shdr = &ehdr->e_shdr[i];
+#if 0
+ if (!(flags & ELF_SKIP_FILESZ_CHECK)
+ && (shdr->sh_type != SHT_NOBITS)
+ && (uintmax_t)(shdr->sh_offset + shdr->sh_size) >
+ (uintmax_t)len) {
+ /* The section does not fit in the buffer */
+ printf("ELF section %zd not in file\n", i);
+ return -1;
+ }
+#endif
+
+ if ((shdr->sh_addr + shdr->sh_size) < shdr->sh_addr) {
+ printf("ELF address wrap around\n");
+ return -1;
+ }
+
+ /* Remember where the section lives in the buffer */
+ shdr->sh_data = (unsigned char *)(buf + shdr->sh_offset);
+ }
+
+ return 0;
+}
+
+static void read_nhdr(const struct mem_ehdr *ehdr,
+ ElfNN_Nhdr *hdr, const unsigned char *note)
+{
+ memcpy(hdr, note, sizeof(*hdr));
+ hdr->n_namesz = elf32_to_cpu(ehdr, hdr->n_namesz);
+ hdr->n_descsz = elf32_to_cpu(ehdr, hdr->n_descsz);
+ hdr->n_type = elf32_to_cpu(ehdr, hdr->n_type);
+}
+
+static int build_mem_notes(struct mem_ehdr *ehdr)
+{
+ const unsigned char *note_start, *note_end, *note;
+ size_t note_size, i;
+
+ /* First find the note segment or section */
+ note_start = note_end = NULL;
+
+ for (i = 0; !note_start && (i < ehdr->e_phnum); i++) {
+ struct mem_phdr *phdr = &ehdr->e_phdr[i];
+ /*
+ * binutils <= 2.17 has a bug where it can create the
+ * PT_NOTE segment with an offset of 0. Therefore
+ * check p_offset > 0.
+ *
+ * See: http://sourceware.org/bugzilla/show_bug.cgi?id=594
+ */
+ if (phdr->p_type == PT_NOTE && phdr->p_offset) {
+ note_start = (unsigned char *)phdr->p_data;
+ note_end = note_start + phdr->p_filesz;
+ }
+ }
+
+ for (i = 0; !note_start && (i < ehdr->e_shnum); i++) {
+ struct mem_shdr *shdr = &ehdr->e_shdr[i];
+ if (shdr->sh_type == SHT_NOTE) {
+ note_start = shdr->sh_data;
+ note_end = note_start + shdr->sh_size;
+ }
+ }
+
+ if (!note_start) {
+ return 0;
+ }
+
+ /* Walk through and count the notes */
+ ehdr->e_notenum = 0;
+ for (note = note_start; note < note_end; note+= note_size) {
+ ElfNN_Nhdr hdr;
+ read_nhdr(ehdr, &hdr, note);
+ note_size = sizeof(hdr);
+ note_size += (hdr.n_namesz + 3) & ~3;
+ note_size += (hdr.n_descsz + 3) & ~3;
+ ehdr->e_notenum += 1;
+ }
+
+ /* Now walk and normalize the notes */
+ ehdr->e_note = xmalloc(sizeof(*ehdr->e_note) * ehdr->e_notenum);
+ for (i = 0, note = note_start; note < note_end; note+= note_size, i++) {
+ const unsigned char *name, *desc;
+ ElfNN_Nhdr hdr;
+ read_nhdr(ehdr, &hdr, note);
+ note_size = sizeof(hdr);
+ name = note + note_size;
+ note_size += (hdr.n_namesz + 3) & ~3;
+ desc = note + note_size;
+ note_size += (hdr.n_descsz + 3) & ~3;
+
+ if ((hdr.n_namesz != 0) && (name[hdr.n_namesz -1] != '\0')) {
+ /* If note name string is not null terminated, just
+ * warn user about it and continue processing. This
+ * allows us to parse /proc/kcore on older kernels
+ * where /proc/kcore elf notes were not null
+ * terminated. It has been fixed in 2.6.19.
+ */
+ printf("Warning: Elf Note name is not null "
+ "terminated\n");
+ }
+ ehdr->e_note[i].n_type = hdr.n_type;
+ ehdr->e_note[i].n_name = (char *)name;
+ ehdr->e_note[i].n_desc = desc;
+ ehdr->e_note[i].n_descsz = hdr.n_descsz;
+
+ }
+
+ return 0;
+}
+
+void free_elf_info(struct mem_ehdr *ehdr)
+{
+ free(ehdr->e_phdr);
+ free(ehdr->e_shdr);
+ memset(ehdr, 0, sizeof(*ehdr));
+}
+
+int build_elf_info(const char *buf, off_t len, struct mem_ehdr *ehdr,
+ uint32_t flags)
+{
+ int result;
+
+ result = build_mem_ehdr(buf, len, ehdr);
+ if (result < 0) {
+ return result;
+ }
+
+ if ((ehdr->e_phoff > 0) && (ehdr->e_phnum > 0)) {
+ result = build_mem_phdrs(buf, len, ehdr, flags);
+ if (result < 0) {
+ free_elf_info(ehdr);
+ return result;
+ }
+ }
+
+ if ((ehdr->e_shoff > 0) && (ehdr->e_shnum > 0)) {
+ result = build_mem_shdrs(buf, len, ehdr, flags);
+ if (result < 0) {
+ free_elf_info(ehdr);
+ return result;
+ }
+ }
+
+ result = build_mem_notes(ehdr);
+ if (result < 0) {
+ free_elf_info(ehdr);
+ return result;
+ }
+
+ return 0;
+}
+
+int check_room_for_elf(struct list_head *elf_segments)
+{
+ struct memory_bank *bank;
+ struct resource *res, *r;
+
+ list_for_each_entry(r, elf_segments, sibling) {
+ int got_bank;
+
+ got_bank = 0;
+ for_each_memory_bank(bank) {
+ resource_size_t start, end;
+
+ res = bank->res;
+
+ /* FIXME: no need in the future? */
+ start = virt_to_phys(res->start);
+ end = virt_to_phys(res->end);
+
+ if ((start <= r->start) && (end >= r->end)) {
+ got_bank = 1;
+ break;
+ }
+ }
+
+ if (!got_bank)
+ return -1;
+ }
+
+ return 0;
+}
+
+/* sort by size */
+static int compare(struct list_head *a, struct list_head *b)
+{
+ struct resource *ra = (struct resource *)list_entry(a, struct resource,
sibling);
+ struct resource *rb = (struct resource *)list_entry(b, struct resource,
sibling);
+ resource_size_t sa, sb;
+
+ sa = ra->end - ra->start;
+ sb = rb->end - rb->start;
+
+ if (sa > sb)
+ return -1;
+ if (sa < sb)
+ return 1;
+ return 0;
+}
+
+void list_add_used_region(struct list_head *new, struct list_head *head)
+{
+ struct list_head *pos, *insert = head;
+ struct resource *rb =
+ (struct resource *)list_entry(new, struct resource, sibling);
+ struct list_head *n;
+
+ /* rb --- new region */
+ list_for_each_safe(pos, n, head) {
+ struct resource *ra = (struct resource *)list_entry(pos, struct
resource, sibling);
+
+ if (((rb->end >= ra->start) && (rb->end <= ra->end))
+ || ((rb->start >= ra->start) && (rb->start <= ra->end))
+ || ((rb->start >= ra->start) && (rb->end <= ra->end))
+ || ((ra->start >= rb->start) && (ra->end <= rb->end))
+ || (ra->start == rb->end + 1)
+ || (rb->start == ra->end + 1)) {
+ rb->start = min(ra->start, rb->start);
+ rb->end = max(ra->end, rb->end);
+ rb->name = "join";
+ list_del(pos);
+ }
+ }
+
+ list_for_each(pos, head) {
+ struct resource *ra = (struct resource *)list_entry(pos, struct
resource, sibling);
+
+ if (ra->start < rb->start)
+ continue;
+
+ insert = pos;
+ break;
+ }
+
+ list_add_tail(new, insert);
+}
+
+resource_size_t dcheck_res(struct list_head *elf_segments)
+{
+ struct memory_bank *bank;
+ struct resource *res, *r, *t;
+
+ LIST_HEAD(elf_relocate_banks);
+ LIST_HEAD(elf_relocate_banks_size_sorted);
+ LIST_HEAD(used_regions);
+
+ for_each_memory_bank(bank) {
+ res = bank->res;
+
+ list_for_each_entry(r, &res->children, sibling) {
+ resource_size_t start, end;
+
+ /* FIXME: no need in the future */
+ start = virt_to_phys(r->start);
+ end = virt_to_phys(r->end);
+
+ t = create_resource(r->name, start, end);
+ list_add_used_region(&t->sibling, &used_regions);
+ }
+ }
+
+ list_for_each_entry(r, elf_segments, sibling) {
+ t = create_resource(r->name, r->start, r->end);
+ list_add_used_region(&t->sibling, &used_regions);
+ }
+
+ for_each_memory_bank(bank) {
+ resource_size_t start;
+
+ res = bank->res;
+ res = create_resource("tmp", virt_to_phys(res->start),
+ virt_to_phys(res->end));
+ start = res->start;
+
+ list_for_each_entry(r, &used_regions, sibling) {
+ if (res->start > r->end)
+ continue;
+
+ if (res->end < r->start)
+ continue;
+
+ if (r->start - start) {
+ struct resource *t;
+
+ t = create_resource("ELF buffer", start,
r->start - 1);
+ list_add_used_region(&t->sibling,
&elf_relocate_banks);
+ }
+ start = r->end + 1;
+ }
+
+ if (res->end - start) {
+ struct resource *t;
+
+ t = create_resource("ELF buffer", start, res->end);
+ list_add_used_region(&t->sibling, &elf_relocate_banks);
+ }
+ }
+
+ list_for_each_entry(r, &elf_relocate_banks, sibling) {
+ struct resource *t;
+
+ t = create_resource("ELF buffer", r->start, r->end);
+ list_add_sort(&t->sibling,
+ &elf_relocate_banks_size_sorted, compare);
+ }
+
+ r = list_first_entry(&elf_relocate_banks_size_sorted, struct resource,
sibling);
+
+ /* FIXME */
+ return r->start;
+}
diff --git a/lib/kexec/kexec-elf.h b/lib/kexec/kexec-elf.h
new file mode 100644
index 0000000..1e1c9e2
--- /dev/null
+++ b/lib/kexec/kexec-elf.h
@@ -0,0 +1,110 @@
+#ifndef KEXEC_ELF_H
+#define KEXEC_ELF_H
+
+struct kexec_info;
+
+struct mem_ehdr {
+ unsigned ei_class;
+ unsigned ei_data;
+ unsigned e_type;
+ unsigned e_machine;
+ unsigned e_version;
+ unsigned e_flags;
+ unsigned e_phnum;
+ unsigned e_shnum;
+ unsigned e_shstrndx;
+ unsigned long long e_entry;
+ unsigned long long e_phoff;
+ unsigned long long e_shoff;
+ unsigned e_notenum;
+ struct mem_phdr *e_phdr;
+ struct mem_shdr *e_shdr;
+ struct mem_note *e_note;
+ unsigned long rel_addr, rel_size;
+};
+
+struct mem_phdr {
+ unsigned long long p_paddr;
+ unsigned long long p_vaddr;
+ unsigned long long p_filesz;
+ unsigned long long p_memsz;
+ unsigned long long p_offset;
+ const char *p_data;
+ unsigned p_type;
+ unsigned p_flags;
+ unsigned long long p_align;
+};
+
+struct mem_shdr {
+ unsigned sh_name;
+ unsigned sh_type;
+ unsigned long long sh_flags;
+ unsigned long long sh_addr;
+ unsigned long long sh_offset;
+ unsigned long long sh_size;
+ unsigned sh_link;
+ unsigned sh_info;
+ unsigned long long sh_addralign;
+ unsigned long long sh_entsize;
+ const unsigned char *sh_data;
+};
+
+struct mem_sym {
+ unsigned long st_name; /* Symbol name (string tbl index) */
+ unsigned char st_info; /* No defined meaning, 0 */
+ unsigned char st_other; /* Symbol type and binding */
+ unsigned st_shndx; /* Section index */
+ unsigned long long st_value; /* Symbol value */
+ unsigned long long st_size; /* Symbol size */
+};
+
+struct mem_rela {
+ unsigned long long r_offset;
+ unsigned r_sym;
+ unsigned r_type;
+ unsigned long long r_addend;
+};
+
+struct mem_note {
+ unsigned n_type;
+ unsigned n_descsz;
+ const char *n_name;
+ const void *n_desc;
+};
+
+/* The definition of an ELF note does not vary depending
+ * on ELFCLASS.
+ */
+typedef struct
+{
+ uint32_t n_namesz; /* Length of the note's name. */
+ uint32_t n_descsz; /* Length of the note's descriptor. */
+ uint32_t n_type; /* Type of the note. */
+} ElfNN_Nhdr;
+
+/* Misc flags */
+
+#define ELF_SKIP_FILESZ_CHECK 0x00000001
+
+extern void free_elf_info(struct mem_ehdr *ehdr);
+extern int build_elf_info(const char *buf, off_t len, struct mem_ehdr *ehdr,
+ uint32_t flags);
+extern int build_elf_exec_info(const char *buf, off_t len,
+ struct mem_ehdr *ehdr, uint32_t flags);
+
+extern int elf_exec_load(struct mem_ehdr *ehdr, struct kexec_info *info);
+
+uint16_t elf16_to_cpu(const struct mem_ehdr *ehdr, uint16_t value);
+uint32_t elf32_to_cpu(const struct mem_ehdr *ehdr, uint32_t value);
+uint64_t elf64_to_cpu(const struct mem_ehdr *ehdr, uint64_t value);
+
+uint16_t cpu_to_elf16(const struct mem_ehdr *ehdr, uint16_t value);
+uint32_t cpu_to_elf32(const struct mem_ehdr *ehdr, uint32_t value);
+uint64_t cpu_to_elf64(const struct mem_ehdr *ehdr, uint64_t value);
+
+unsigned long elf_max_addr(const struct mem_ehdr *ehdr);
+int check_room_for_elf(struct list_head *elf_segments);
+resource_size_t dcheck_res(struct list_head *elf_segments);
+void list_add_used_region(struct list_head *new, struct list_head *head);
+
+#endif /* KEXEC_ELF_H */
diff --git a/lib/kexec/kexec.c b/lib/kexec/kexec.c
new file mode 100644
index 0000000..f9e94b2
--- /dev/null
+++ b/lib/kexec/kexec.c
@@ -0,0 +1,251 @@
+/*
+ * kexec: Linux boots Linux
+ *
+ * Copyright (C) 2003-2005 Eric Biederman (ebied...@xmission.com)
+ *
+ * Modified (2007-05-15) by Francesco Chiechi to rudely handle mips platform
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation (version 2 of the License).
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define _GNU_SOURCE
+#include <linux/types.h>
+#include <common.h>
+
+#include <asm/io.h>
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <linux/stat.h>
+#include <fcntl.h>
+
+#include "config.h"
+
+#include "kexec.h"
+#include "kexec-elf.h"
+#include <fs.h>
+
+void die(char *fmt, ...)
+{
+}
+
+static void print_segments(struct kexec_info *info)
+{
+ int i;
+
+ printf("nr_segments = %d\n", info->nr_segments);
+ for (i = 0; i < info->nr_segments; i++) {
+ printf("segment[%d].buf = %p\n", i,
+ info->segment[i].buf);
+ printf("segment[%d].bufsz = %zx\n", i,
+ info->segment[i].bufsz);
+ printf("segment[%d].mem = %p\n", i,
+ info->segment[i].mem);
+ printf("segment[%d].memsz = %zx\n", i,
+ info->segment[i].memsz);
+ }
+}
+
+int sort_segments(struct kexec_info *info)
+{
+ int i, j;
+ void *end;
+
+ /* Do a stupid insertion sort... */
+ for (i = 0; i < info->nr_segments; i++) {
+ int tidx;
+ struct kexec_segment temp;
+ tidx = i;
+ for (j = i +1; j < info->nr_segments; j++) {
+ if (info->segment[j].mem < info->segment[tidx].mem) {
+ tidx = j;
+ }
+ }
+ if (tidx != i) {
+ temp = info->segment[tidx];
+ info->segment[tidx] = info->segment[i];
+ info->segment[i] = temp;
+ }
+ }
+ /* Now see if any of the segments overlap */
+ end = 0;
+ for (i = 0; i < info->nr_segments; i++) {
+ if (end > info->segment[i].mem) {
+ printf("Overlapping memory segments at %p\n",
+ end);
+ return -1;
+ }
+ end = ((char *)info->segment[i].mem) + info->segment[i].memsz;
+ }
+ return 0;
+}
+
+void add_segment_phys_virt(struct kexec_info *info,
+ const void *buf, size_t bufsz,
+ unsigned long base, size_t memsz, int phys)
+{
+ size_t size;
+ int pagesize;
+
+ if (bufsz > memsz) {
+ bufsz = memsz;
+ }
+
+ /* Forget empty segments */
+ if (memsz == 0) {
+ return;
+ }
+
+ /* Round memsz up to a multiple of pagesize */
+ //pagesize = getpagesize();
+ pagesize = 4096;
+ memsz = (memsz + (pagesize - 1)) & ~(pagesize - 1);
+
+ /* Verify base is pagesize aligned.
+ * Finding a way to cope with this problem
+ * is important but for now error so at least
+ * we are not surprised by the code doing the wrong
+ * thing.
+ */
+ if (base & (pagesize -1)) {
+ die("Base address: %lx is not page aligned\n", base);
+ }
+
+ if (phys)
+ base = virt_to_phys((void *)base);
+
+ size = (info->nr_segments + 1) * sizeof(info->segment[0]);
+ info->segment = xrealloc(info->segment, size);
+ info->segment[info->nr_segments].buf = buf;
+ info->segment[info->nr_segments].bufsz = bufsz;
+ info->segment[info->nr_segments].mem = (void *)base;
+ info->segment[info->nr_segments].memsz = memsz;
+ info->nr_segments++;
+ if (info->nr_segments > KEXEC_MAX_SEGMENTS) {
+ printf("Warning: kernel segment limit reached. "
+ "This will likely fail\n");
+ }
+}
+
+/*
+ * Load the new kernel
+ */
+static int my_load(char *kernel, unsigned long kexec_flags)
+{
+ char *kernel_buf;
+ off_t kernel_size;
+ int i = 0;
+ int result;
+ struct kexec_info info;
+ long native_arch;
+
+ memset(&info, 0, sizeof(info));
+ info.segment = NULL;
+ info.nr_segments = 0;
+ info.entry = NULL;
+ info.kexec_flags = kexec_flags;
+
+ result = 0;
+ /* slurp in the input kernel */
+ /* FIXME: add a decompresion routines insted of read_file() */
+ kernel_buf = read_file(kernel, &kernel_size);
+
+ for (i = 0; i < kexec_file_types; i++) {
+ if (kexec_file_type[i].probe(kernel_buf, kernel_size) >= 0)
+ break;
+ }
+
+ if (i == kexec_file_types) {
+ printf("Cannot determine the file type "
+ "of %s\n", kernel);
+ return -1;
+ }
+
+ /* Figure out our native architecture before load */
+#if 0
+ native_arch = physical_arch();
+ if (native_arch < 0) {
+ return -1;
+ }
+#endif
+ native_arch = 0;
+ info.kexec_flags |= native_arch;
+
+ result = kexec_file_type[i].load(kernel_buf, kernel_size, &info);
+ if (result < 0) {
+ switch (result) {
+ case EFAILED:
+ default:
+ printf("Cannot load %s\n", kernel);
+ break;
+ }
+ return result;
+ }
+
+ /* Verify all of the segments load to a valid location in memory */
+
+ /* Sort the segments and verify we don't have overlaps */
+ if (sort_segments(&info) < 0) {
+ return -1;
+ }
+
+ result = kexec_load(info.entry,
+ info.nr_segments, info.segment, info.kexec_flags);
+
+ if (result != 0) {
+ /* The load failed, print some debugging information */
+ printf("kexec_load failed: %s\n",
+ strerror(errno));
+ printf("entry = %p flags = %lx\n",
+ info.entry, info.kexec_flags);
+ print_segments(&info);
+ }
+
+ return result;
+}
+
+#include <boot.h>
+#include <init.h>
+#include <binfmt.h>
+
+static int do_bootm_elf(struct image_data *data)
+{
+ my_load(data->os_file, 0);
+
+ /* unreachable(); */
+ return 0;
+}
+
+static struct image_handler elf_handler = {
+ .name = "ELF",
+ .bootm = do_bootm_elf,
+ .filetype = filetype_elf,
+};
+
+static struct binfmt_hook binfmt_elf_hook = {
+ .type = filetype_elf,
+ .exec = "bootm",
+};
+
+static int elf_register_image_handler(void)
+{
+ register_image_handler(&elf_handler);
+ binfmt_register(&binfmt_elf_hook);
+
+ return 0;
+}
+late_initcall(elf_register_image_handler);
diff --git a/lib/kexec/kexec.h b/lib/kexec/kexec.h
new file mode 100644
index 0000000..74e7ca9
--- /dev/null
+++ b/lib/kexec/kexec.h
@@ -0,0 +1,117 @@
+#ifndef KEXEC_H
+#define KEXEC_H
+
+#include <common.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <asm/byteorder.h>
+
+#include "kexec-elf.h"
+
+/*
+ * Document some of the reasons why crashdump may fail, so we can give
+ * better error messages
+ */
+#define EFAILED -1 /* default error code */
+
+struct kexec_segment {
+ const void *buf;
+ size_t bufsz;
+ const void *mem;
+ size_t memsz;
+};
+
+struct kexec_info {
+ struct kexec_segment *segment;
+ int nr_segments;
+ void *entry;
+ struct mem_ehdr rhdr;
+ unsigned long kexec_flags;
+};
+
+struct arch_map_entry {
+ const char *machine;
+ unsigned long arch;
+};
+
+extern const struct arch_map_entry arches[];
+long physical_arch(void);
+
+int sort_segments(struct kexec_info *info);
+typedef int (probe_t)(const char *kernel_buf, off_t kernel_size);
+typedef int (load_t )(//int argc, char **argv,
+ const char *kernel_buf, off_t kernel_size,
+ struct kexec_info *info);
+struct kexec_file_type {
+ const char *name;
+ probe_t *probe;
+ load_t *load;
+};
+
+extern struct kexec_file_type kexec_file_type[];
+extern int kexec_file_types;
+
+extern void die(char *fmt, ...);
+extern void add_segment(struct kexec_info *info,
+ const void *buf, size_t bufsz, unsigned long base, size_t memsz);
+extern void add_segment_phys_virt(struct kexec_info *info,
+ const void *buf, size_t bufsz, unsigned long base, size_t memsz,
+ int phys);
+extern unsigned long add_buffer(struct kexec_info *info,
+ const void *buf, unsigned long bufsz, unsigned long memsz,
+ unsigned long buf_align, unsigned long buf_min, unsigned long buf_max,
+ int buf_end);
+extern unsigned long add_buffer_phys_virt(struct kexec_info *info,
+ const void *buf, unsigned long bufsz, unsigned long memsz,
+ unsigned long buf_align, unsigned long buf_min, unsigned long buf_max,
+ int buf_end, int phys);
+
+/* Limits of integral types. */
+#ifndef INT8_MIN
+#define INT8_MIN (-128)
+#endif
+#ifndef INT16_MIN
+#define INT16_MIN (-32767-1)
+#endif
+#ifndef INT32_MIN
+#define INT32_MIN (-2147483647-1)
+#endif
+#ifndef INT8_MAX
+#define INT8_MAX (127)
+#endif
+#ifndef INT16_MAX
+#define INT16_MAX (32767)
+#endif
+#ifndef INT32_MAX
+#define INT32_MAX (2147483647)
+#endif
+#ifndef UINT8_MAX
+#define UINT8_MAX (255U)
+#endif
+#ifndef UINT16_MAX
+#define UINT16_MAX (65535U)
+#endif
+#ifndef UINT32_MAX
+#define UINT32_MAX (4294967295U)
+#endif
+
+/* These values match the ELF architecture values.
+ * Unless there is a good reason that should continue to be the case.
+ */
+#define KEXEC_ARCH_DEFAULT ( 0 << 16)
+#define KEXEC_ARCH_386 ( 3 << 16)
+#define KEXEC_ARCH_X86_64 (62 << 16)
+#define KEXEC_ARCH_PPC (20 << 16)
+#define KEXEC_ARCH_PPC64 (21 << 16)
+#define KEXEC_ARCH_IA_64 (50 << 16)
+#define KEXEC_ARCH_ARM (40 << 16)
+#define KEXEC_ARCH_S390 (22 << 16)
+#define KEXEC_ARCH_SH (42 << 16)
+#define KEXEC_ARCH_MIPS_LE (10 << 16)
+#define KEXEC_ARCH_MIPS ( 8 << 16)
+#define KEXEC_ARCH_CRIS (76 << 16)
+
+#define KEXEC_MAX_SEGMENTS 16
+
+#endif /* KEXEC_H */
--
1.7.10.4
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