mirror of
https://github.com/torvalds/linux.git
synced 2024-11-17 01:22:07 +00:00
918d03552e
We leave it at zero (though it could be 1) for old tasks. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
143 lines
4.9 KiB
C
143 lines
4.9 KiB
C
/*
|
|
* 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. */
|
|
|
|
extern unsigned long randomize_et_dyn(unsigned long base);
|
|
#define ELF_ET_DYN_BASE (randomize_et_dyn(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); \
|
|
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)))
|
|
|
|
extern unsigned long arch_randomize_brk(struct mm_struct *mm);
|
|
#define arch_randomize_brk arch_randomize_brk
|
|
|
|
|
|
#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 */
|