* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
*/
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/**
* @file
#include <ipxe/image.h>
#include <ipxe/elf.h>
-typedef Elf32_Ehdr Elf_Ehdr;
-typedef Elf32_Phdr Elf_Phdr;
-typedef Elf32_Off Elf_Off;
-#define ELFCLASS ELFCLASS32
-
/**
* Load ELF segment into memory
*
* @v image ELF file
* @v phdr ELF program header
+ * @v dest Destination address
+ * @ret rc Return status code
+ */
+static int elf_load_segment ( struct image *image, Elf_Phdr *phdr,
+ physaddr_t dest ) {
+ userptr_t buffer = phys_to_user ( dest );
+ int rc;
+
+ DBGC ( image, "ELF %p loading segment [%x,%x) to [%lx,%lx,%lx)\n",
+ image, phdr->p_offset, ( phdr->p_offset + phdr->p_filesz ),
+ dest, ( dest + phdr->p_filesz ), ( dest + phdr->p_memsz ) );
+
+ /* Verify and prepare segment */
+ if ( ( rc = prep_segment ( buffer, phdr->p_filesz,
+ phdr->p_memsz ) ) != 0 ) {
+ DBGC ( image, "ELF %p could not prepare segment: %s\n",
+ image, strerror ( rc ) );
+ return rc;
+ }
+
+ /* Copy image to segment */
+ memcpy_user ( buffer, 0, image->data, phdr->p_offset, phdr->p_filesz );
+
+ return 0;
+}
+
+/**
+ * Process ELF segment
+ *
+ * @v image ELF file
* @v ehdr ELF executable header
+ * @v phdr ELF program header
+ * @v process Segment processor
* @ret entry Entry point, if found
* @ret max Maximum used address
* @ret rc Return status code
*/
-static int elf_load_segment ( struct image *image, Elf_Phdr *phdr,
- Elf_Ehdr *ehdr, physaddr_t *entry,
- physaddr_t *max ) {
+static int elf_segment ( struct image *image, Elf_Ehdr *ehdr, Elf_Phdr *phdr,
+ int ( * process ) ( struct image *image,
+ Elf_Phdr *phdr, physaddr_t dest ),
+ physaddr_t *entry, physaddr_t *max ) {
physaddr_t dest;
physaddr_t end;
- userptr_t buffer;
unsigned long e_offset;
int rc;
image );
return -ENOEXEC;
}
- buffer = phys_to_user ( dest );
end = ( dest + phdr->p_memsz );
- DBGC ( image, "ELF %p loading segment [%x,%x) to [%x,%x,%x)\n", image,
- phdr->p_offset, ( phdr->p_offset + phdr->p_filesz ),
- phdr->p_paddr, ( phdr->p_paddr + phdr->p_filesz ),
- ( phdr->p_paddr + phdr->p_memsz ) );
-
- /* Verify and prepare segment */
- if ( ( rc = prep_segment ( buffer, phdr->p_filesz,
- phdr->p_memsz ) ) != 0 ) {
- DBGC ( image, "ELF %p could not prepare segment: %s\n",
- image, strerror ( rc ) );
- return rc;
- }
-
/* Update maximum used address, if applicable */
if ( end > *max )
*max = end;
- /* Copy image to segment */
- memcpy_user ( buffer, 0, image->data, phdr->p_offset, phdr->p_filesz );
+ /* Process segment */
+ if ( ( rc = process ( image, phdr, dest ) ) != 0 )
+ return rc;
/* Set execution address, if it lies within this segment */
if ( ( e_offset = ( ehdr->e_entry - dest ) ) < phdr->p_filesz ) {
}
/**
- * Load ELF image into memory
+ * Process ELF segments
*
* @v image ELF file
- * @ret entry Entry point
+ * @v ehdr ELF executable header
+ * @v process Segment processor
+ * @ret entry Entry point, if found
* @ret max Maximum used address
* @ret rc Return status code
*/
-int elf_load ( struct image *image, physaddr_t *entry, physaddr_t *max ) {
- static const uint8_t e_ident[] = {
- [EI_MAG0] = ELFMAG0,
- [EI_MAG1] = ELFMAG1,
- [EI_MAG2] = ELFMAG2,
- [EI_MAG3] = ELFMAG3,
- [EI_CLASS] = ELFCLASS,
- };
- Elf_Ehdr ehdr;
+int elf_segments ( struct image *image, Elf_Ehdr *ehdr,
+ int ( * process ) ( struct image *image, Elf_Phdr *phdr,
+ physaddr_t dest ),
+ physaddr_t *entry, physaddr_t *max ) {
Elf_Phdr phdr;
Elf_Off phoff;
unsigned int phnum;
int rc;
- /* Read ELF header */
- copy_from_user ( &ehdr, image->data, 0, sizeof ( ehdr ) );
- if ( memcmp ( &ehdr.e_ident[EI_MAG0], e_ident,
- sizeof ( e_ident ) ) != 0 ) {
- DBGC ( image, "ELF %p has invalid signature\n", image );
- return -ENOEXEC;
- }
-
/* Initialise maximum used address */
*max = 0;
/* Invalidate entry point */
*entry = 0;
- /* Read ELF program headers */
- for ( phoff = ehdr.e_phoff , phnum = ehdr.e_phnum ; phnum ;
- phoff += ehdr.e_phentsize, phnum-- ) {
+ /* Read and process ELF program headers */
+ for ( phoff = ehdr->e_phoff , phnum = ehdr->e_phnum ; phnum ;
+ phoff += ehdr->e_phentsize, phnum-- ) {
if ( phoff > image->len ) {
DBGC ( image, "ELF %p program header %d outside "
"image\n", image, phnum );
return -ENOEXEC;
}
copy_from_user ( &phdr, image->data, phoff, sizeof ( phdr ) );
- if ( ( rc = elf_load_segment ( image, &phdr, &ehdr,
- entry, max ) ) != 0 ) {
+ if ( ( rc = elf_segment ( image, ehdr, &phdr, process,
+ entry, max ) ) != 0 )
return rc;
- }
}
/* Check for a valid execution address */
if ( ! *entry ) {
DBGC ( image, "ELF %p entry point %lx outside image\n",
- image, ( ( unsigned long ) ehdr.e_entry ) );
+ image, ( ( unsigned long ) ehdr->e_entry ) );
+ return -ENOEXEC;
+ }
+
+ return 0;
+}
+
+/**
+ * Load ELF image into memory
+ *
+ * @v image ELF file
+ * @ret entry Entry point
+ * @ret max Maximum used address
+ * @ret rc Return status code
+ */
+int elf_load ( struct image *image, physaddr_t *entry, physaddr_t *max ) {
+ static const uint8_t e_ident[] = {
+ [EI_MAG0] = ELFMAG0,
+ [EI_MAG1] = ELFMAG1,
+ [EI_MAG2] = ELFMAG2,
+ [EI_MAG3] = ELFMAG3,
+ [EI_CLASS] = ELFCLASS,
+ };
+ Elf_Ehdr ehdr;
+ int rc;
+
+ /* Read ELF header */
+ copy_from_user ( &ehdr, image->data, 0, sizeof ( ehdr ) );
+ if ( memcmp ( &ehdr.e_ident[EI_MAG0], e_ident,
+ sizeof ( e_ident ) ) != 0 ) {
+ DBGC ( image, "ELF %p has invalid signature\n", image );
return -ENOEXEC;
}
+ /* Load ELF segments into memory */
+ if ( ( rc = elf_segments ( image, &ehdr, elf_load_segment,
+ entry, max ) ) != 0 )
+ return rc;
+
return 0;
}
Code Review / kvmfornfv.git / blobdiff