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[elf] Reject ELFBoot images requiring virtual addressing

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We do not set up any kind of virtual addressing before invoking an
ELFBoot image.  Reject if the image's program headers indicate that
virtual addresses are not equal to physical addresses.

This avoids problems when loading some RHEL5 kernels, which seem to
include ELFBoot headers using virtual addressing.  With this change,
these kernels are no longer detected as ELFBoot, and so may be
(correctly) detected as bzImage instead.

Reported-by: Torgeir.Wulfsberg@kongsberg.com
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2015-07-29 14:09:34 +01:00
parent 1e4ff872be
commit ae7f22eb28
3 changed files with 135 additions and 56 deletions
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11
src/include/ipxe/elf.h
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@@ -10,8 +10,19 @@
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <stdint.h>
#include <ipxe/image.h>
#include <elf.h>
typedef Elf32_Ehdr Elf_Ehdr;
typedef Elf32_Phdr Elf_Phdr;
typedef Elf32_Off Elf_Off;
#define ELFCLASS ELFCLASS32
extern 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 );
extern int elf_load ( struct image *image, physaddr_t *entry, physaddr_t *max );
#endif /* _IPXE_ELF_H */