arm: boot: Support big-endian elfs

Support ARM big-endian ELF files in system-mode emulation. When loading
an elf, determine the endianness mode expected by the elf, and set the
relevant CPU state accordingly.

With this, big-endian modes are now fully supported via system-mode LE,
so there is no need to restrict the elf loading to the TARGET
endianness so the ifdeffery on TARGET_WORDS_BIGENDIAN goes away.

Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: fix typo in comments]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Crosthwaite 2016-03-04 11:30:21 +00:00 committed by Peter Maydell
parent 7ef295ea5b
commit 9776f63645
2 changed files with 92 additions and 10 deletions

View file

@ -16,6 +16,13 @@
#include "qemu/notify.h"
#include "cpu.h"
typedef enum {
ARM_ENDIANNESS_UNKNOWN = 0,
ARM_ENDIANNESS_LE,
ARM_ENDIANNESS_BE8,
ARM_ENDIANNESS_BE32,
} arm_endianness;
/* armv7m.c */
DeviceState *armv7m_init(MemoryRegion *system_memory, int mem_size, int num_irq,
const char *kernel_filename, const char *cpu_model);
@ -103,6 +110,8 @@ struct arm_boot_info {
* changing to non-secure state if implementing a non-secure boot
*/
bool secure_board_setup;
arm_endianness endianness;
};
/**