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Diffstat (limited to 'arch/powerpc/include/asm/elf.h')
| -rw-r--r-- | arch/powerpc/include/asm/elf.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/elf.h b/arch/powerpc/include/asm/elf.h new file mode 100644 index 000000000..ee46ffef6 --- /dev/null +++ b/arch/powerpc/include/asm/elf.h @@ -0,0 +1,139 @@ +/* + * ELF register definitions.. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ +#ifndef _ASM_POWERPC_ELF_H +#define _ASM_POWERPC_ELF_H + +#include <linux/sched.h> /* for task_struct */ +#include <asm/page.h> +#include <asm/string.h> +#include <uapi/asm/elf.h> + +/* + * This is used to ensure we don't load something for the wrong architecture. + */ +#define elf_check_arch(x) ((x)->e_machine == ELF_ARCH) +#define compat_elf_check_arch(x) ((x)->e_machine == EM_PPC) + +#define CORE_DUMP_USE_REGSET +#define ELF_EXEC_PAGESIZE PAGE_SIZE + +/* This is the location that an ET_DYN program is loaded if exec'ed. Typical + use of this is to invoke "./ld.so someprog" to test out a new version of + the loader. We need to make sure that it is out of the way of the program + that it will "exec", and that there is sufficient room for the brk. */ + +#define ELF_ET_DYN_BASE 0x20000000 + +#define ELF_CORE_EFLAGS (is_elf2_task() ? 2 : 0) + +/* + * 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) +{ + PPC_ELF_CORE_COPY_REGS(elf_regs, regs); +} +#define ELF_CORE_COPY_REGS(gregs, regs) ppc_elf_core_copy_regs(gregs, regs); + +typedef elf_vrregset_t elf_fpxregset_t; + +/* ELF_HWCAP yields a mask that user programs can use to figure out what + instruction set this cpu supports. This could be done in userspace, + but it's not easy, and we've already done it here. */ +# define ELF_HWCAP (cur_cpu_spec->cpu_user_features) +# define ELF_HWCAP2 (cur_cpu_spec->cpu_user_features2) + +/* This yields a string that ld.so will use to load implementation + specific libraries for optimization. This is more specific in + intent than poking at uname or /proc/cpuinfo. */ + +#define ELF_PLATFORM (cur_cpu_spec->platform) + +/* While ELF_PLATFORM indicates the ISA supported by the platform, it + * may not accurately reflect the underlying behavior of the hardware + * (as in the case of running in Power5+ compatibility mode on a + * Power6 machine). ELF_BASE_PLATFORM allows ld.so to load libraries + * that are tuned for the real hardware. + */ +#define ELF_BASE_PLATFORM (powerpc_base_platform) + +#ifdef __powerpc64__ +# define ELF_PLAT_INIT(_r, load_addr) do { \ + _r->gpr[2] = load_addr; \ +} while (0) +#endif /* __powerpc64__ */ + +#ifdef __powerpc64__ +# define SET_PERSONALITY(ex) \ +do { \ + if (((ex).e_flags & 0x3) == 2) \ + set_thread_flag(TIF_ELF2ABI); \ + else \ + clear_thread_flag(TIF_ELF2ABI); \ + if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \ + set_thread_flag(TIF_32BIT); \ + else \ + clear_thread_flag(TIF_32BIT); \ + if (personality(current->personality) != PER_LINUX32) \ + set_personality(PER_LINUX | \ + (current->personality & (~PER_MASK))); \ +} while (0) +/* + * An executable for which elf_read_implies_exec() returns TRUE will + * have the READ_IMPLIES_EXEC personality flag set automatically. This + * is only required to work around bugs in old 32bit toolchains. Since + * the 64bit ABI has never had these issues dont enable the workaround + * even if we have an executable stack. + */ +# define elf_read_implies_exec(ex, exec_stk) (is_32bit_task() ? \ + (exec_stk == EXSTACK_DEFAULT) : 0) +#else +# define elf_read_implies_exec(ex, exec_stk) (exec_stk == EXSTACK_DEFAULT) +#endif /* __powerpc64__ */ + +extern int dcache_bsize; +extern int icache_bsize; +extern int ucache_bsize; + +/* vDSO has arch_setup_additional_pages */ +#define ARCH_HAS_SETUP_ADDITIONAL_PAGES +struct linux_binprm; +extern int arch_setup_additional_pages(struct linux_binprm *bprm, + int uses_interp); +#define VDSO_AUX_ENT(a,b) NEW_AUX_ENT(a,b) + +/* 1GB for 64bit, 8MB for 32bit */ +#define STACK_RND_MASK (is_32bit_task() ? \ + (0x7ff >> (PAGE_SHIFT - 12)) : \ + (0x3ffff >> (PAGE_SHIFT - 12))) + +#ifdef CONFIG_SPU_BASE +/* Notes used in ET_CORE. Note name is "SPU/<fd>/<filename>". */ +#define NT_SPU 1 + +#define ARCH_HAVE_EXTRA_ELF_NOTES + +#endif /* CONFIG_SPU_BASE */ + +#endif /* _ASM_POWERPC_ELF_H */ |