diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-powerpc/elf.h | 38 |
1 files changed, 20 insertions, 18 deletions
diff --git a/include/asm-powerpc/elf.h b/include/asm-powerpc/elf.h index 5b9e3f41d649..8925c2813667 100644 --- a/include/asm-powerpc/elf.h +++ b/include/asm-powerpc/elf.h @@ -101,6 +101,7 @@ typedef elf_greg_t64 elf_gregset_t64[ELF_NGREG]; typedef unsigned int elf_greg_t32; typedef elf_greg_t32 elf_gregset_t32[ELF_NGREG]; +typedef elf_gregset_t32 compat_elf_gregset_t; /* * ELF_ARCH, CLASS, and DATA are used to set parameters in the core dumps. @@ -175,26 +176,27 @@ typedef elf_vrreg_t elf_vrregset_t32[ELF_NVRREG32]; #define ELF_ET_DYN_BASE (0x20000000) -/* Common routine for both 32-bit and 64-bit processes */ +/* + * Our registers are always unsigned longs, whether we're a 32 bit + * process or 64 bit, on either a 64 bit or 32 bit kernel. + * + * This macro relies on elf_regs[i] having the right type to truncate to, + * either u32 or u64. It defines the body of the elf_core_copy_regs + * function, either the native one with elf_gregset_t elf_regs or + * the 32-bit one with elf_gregset_t32 elf_regs. + */ +#define PPC_ELF_CORE_COPY_REGS(elf_regs, regs) \ + int i, nregs = min(sizeof(*regs) / sizeof(unsigned long), \ + (size_t)ELF_NGREG); \ + for (i = 0; i < nregs; i++) \ + elf_regs[i] = ((unsigned long *) regs)[i]; \ + memset(&elf_regs[i], 0, (ELF_NGREG - i) * sizeof(elf_regs[0])) + +/* Common routine for both 32-bit and 64-bit native processes */ static inline void ppc_elf_core_copy_regs(elf_gregset_t elf_regs, - struct pt_regs *regs) + struct pt_regs *regs) { - int i, nregs; - - memset((void *)elf_regs, 0, sizeof(elf_gregset_t)); - - /* Our registers are always unsigned longs, whether we're a 32 bit - * process or 64 bit, on either a 64 bit or 32 bit kernel. - * Don't use ELF_GREG_TYPE here. */ - nregs = sizeof(struct pt_regs) / sizeof(unsigned long); - if (nregs > ELF_NGREG) - nregs = ELF_NGREG; - - for (i = 0; i < nregs; i++) { - /* This will correctly truncate 64 bit registers to 32 bits - * for a 32 bit process on a 64 bit kernel. */ - elf_regs[i] = (elf_greg_t)((ELF_GREG_TYPE *)regs)[i]; - } + PPC_ELF_CORE_COPY_REGS(elf_regs, regs); } #define ELF_CORE_COPY_REGS(gregs, regs) ppc_elf_core_copy_regs(gregs, regs); |