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target-ppc: Support little-endian PPC64 in user mode.

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Look at ELF header to determine ABI version on PPC64.  This is required
for executing the first instruction correctly.  Also print correct machine
name in uname() system call.

Signed-off-by: Doug Kwan <dougkwan@google.com>
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Doug Kwan 2014-05-29 09:12:19 -05:00 committed by Alexander Graf
parent a721d390b3
commit d90b94cd78
3 changed files with 24 additions and 2 deletions
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5
include/elf.h
View file

@ -561,6 +561,11 @@ typedef struct {
#define SHF_ALPHA_GPREL 0x10000000
/* PowerPC specific definitions. */
/* Processor specific flags for the ELF header e_flags field. */
#define EF_PPC64_ABI 0x3
/* PowerPC relocations defined by the ABIs */
#define R_PPC_NONE 0
#define R_PPC_ADDR32 1 /* 32bit absolute address */

17
linux-user/elfload.c
View file

@ -784,12 +784,18 @@ static uint32_t get_elf_hwcap(void)
NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
} while (0)
static inline uint32_t get_ppc64_abi(struct image_info *infop);
static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
{
_regs->gpr[1] = infop->start_stack;
#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
_regs->gpr[2] = ldq_raw(infop->entry + 8) + infop->load_bias;
infop->entry = ldq_raw(infop->entry) + infop->load_bias;
if (get_ppc64_abi(infop) < 2) {
_regs->gpr[2] = ldq_raw(infop->entry + 8) + infop->load_bias;
infop->entry = ldq_raw(infop->entry) + infop->load_bias;
} else {
_regs->gpr[12] = infop->entry; /* r12 set to global entry address */
}
#endif
_regs->nip = infop->entry;
}
@ -1159,6 +1165,13 @@ static inline void init_thread(struct target_pt_regs *regs, struct image_info *i
#include "elf.h"
#ifdef TARGET_PPC
static inline uint32_t get_ppc64_abi(struct image_info *infop)
{
return infop->elf_flags & EF_PPC64_ABI;
}
#endif
struct exec
{
unsigned int a_info; /* Use macros N_MAGIC, etc for access */

4
linux-user/ppc/syscall.h
View file

@ -58,8 +58,12 @@ struct target_revectored_struct {
*/
#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
#ifdef TARGET_WORDS_BIGENDIAN
#define UNAME_MACHINE "ppc64"
#else
#define UNAME_MACHINE "ppc64le"
#endif
#else
#define UNAME_MACHINE "ppc"
#endif
#define UNAME_MINIMUM_RELEASE "2.6.32"