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 <address@hidden> Signed-off-by: Tom Musta <tommu...@gmail.com> --- V3: Addressing Peter Maydell's comments regarding how and where to define UNAME_MACHINE. Addressed indentation issue (checkpatch failure). include/elf.h | 5 +++++ linux-user/elfload.c | 17 +++++++++++++++-- linux-user/ppc/syscall.h | 4 ++++ 3 files changed, 24 insertions(+), 2 deletions(-) diff --git a/include/elf.h b/include/elf.h index 1599ab2..e88d52f 100644 --- a/include/elf.h +++ b/include/elf.h @@ -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 */ diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 995f999..def9698 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -777,12 +777,18 @@ 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; } @@ -1152,6 +1158,13 @@ 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 */ diff --git a/linux-user/ppc/syscall.h b/linux-user/ppc/syscall.h index 6514c63..db92bbe 100644 --- a/linux-user/ppc/syscall.h +++ b/linux-user/ppc/syscall.h @@ -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" -- 1.7.1