137 lines
4.1 KiB
C
137 lines
4.1 KiB
C
#ifndef __ASMARM_ELF_H
|
|
#define __ASMARM_ELF_H
|
|
|
|
|
|
/*
|
|
* ELF register definitions..
|
|
*/
|
|
|
|
#include <asm/ptrace.h>
|
|
#include <asm/user.h>
|
|
|
|
typedef unsigned long elf_greg_t;
|
|
typedef unsigned long elf_freg_t[3];
|
|
|
|
#define EM_ARM 40
|
|
#define EF_ARM_APCS26 0x08
|
|
#define EF_ARM_SOFT_FLOAT 0x200
|
|
#define EF_ARM_EABI_MASK 0xFF000000
|
|
|
|
#define R_ARM_NONE 0
|
|
#define R_ARM_PC24 1
|
|
#define R_ARM_ABS32 2
|
|
#define R_ARM_CALL 28
|
|
#define R_ARM_JUMP24 29
|
|
|
|
#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
|
|
typedef elf_greg_t elf_gregset_t[ELF_NGREG];
|
|
|
|
typedef struct user_fp elf_fpregset_t;
|
|
|
|
/*
|
|
* These are used to set parameters in the core dumps.
|
|
*/
|
|
#define ELF_CLASS ELFCLASS32
|
|
#ifdef __ARMEB__
|
|
#define ELF_DATA ELFDATA2MSB
|
|
#else
|
|
#define ELF_DATA ELFDATA2LSB
|
|
#endif
|
|
#define ELF_ARCH EM_ARM
|
|
|
|
#ifdef __KERNEL__
|
|
#include <asm/procinfo.h>
|
|
|
|
/*
|
|
* This is used to ensure we don't load something for the wrong architecture.
|
|
*/
|
|
#define elf_check_arch(x) ( ((x)->e_machine == EM_ARM) && (ELF_PROC_OK((x))) )
|
|
|
|
#define USE_ELF_CORE_DUMP
|
|
#define ELF_EXEC_PAGESIZE 4096
|
|
|
|
/* 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 (2 * TASK_SIZE / 3)
|
|
|
|
/* When the program starts, a1 contains a pointer to a function to be
|
|
registered with atexit, as per the SVR4 ABI. A value of 0 means we
|
|
have no such handler. */
|
|
#define ELF_PLAT_INIT(_r, load_addr) (_r)->ARM_r0 = 0
|
|
|
|
/* This yields a mask that user programs can use to figure out what
|
|
instruction set this cpu supports. */
|
|
|
|
#define ELF_HWCAP (elf_hwcap)
|
|
|
|
/* 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. */
|
|
|
|
/* For now we just provide a fairly general string that describes the
|
|
processor family. This could be made more specific later if someone
|
|
implemented optimisations that require it. 26-bit CPUs give you
|
|
"v1l" for ARM2 (no SWP) and "v2l" for anything else (ARM1 isn't
|
|
supported). 32-bit CPUs give you "v3[lb]" for anything based on an
|
|
ARM6 or ARM7 core and "armv4[lb]" for anything based on a StrongARM-1
|
|
core. */
|
|
|
|
#define ELF_PLATFORM_SIZE 8
|
|
extern char elf_platform[];
|
|
#define ELF_PLATFORM (elf_platform)
|
|
|
|
/*
|
|
* 32-bit code is always OK. Some cpus can do 26-bit, some can't.
|
|
*/
|
|
#define ELF_PROC_OK(x) (ELF_THUMB_OK(x) && ELF_26BIT_OK(x))
|
|
|
|
#define ELF_THUMB_OK(x) \
|
|
(( (elf_hwcap & HWCAP_THUMB) && ((x)->e_entry & 1) == 1) || \
|
|
((x)->e_entry & 3) == 0)
|
|
|
|
#define ELF_26BIT_OK(x) \
|
|
(( (elf_hwcap & HWCAP_26BIT) && (x)->e_flags & EF_ARM_APCS26) || \
|
|
((x)->e_flags & EF_ARM_APCS26) == 0)
|
|
|
|
#ifndef CONFIG_IWMMXT
|
|
|
|
/* Old NetWinder binaries were compiled in such a way that the iBCS
|
|
heuristic always trips on them. Until these binaries become uncommon
|
|
enough not to care, don't trust the `ibcs' flag here. In any case
|
|
there is no other ELF system currently supported by iBCS.
|
|
@@ Could print a warning message to encourage users to upgrade. */
|
|
#define SET_PERSONALITY(ex,ibcs2) \
|
|
set_personality(((ex).e_flags&EF_ARM_APCS26 ?PER_LINUX :PER_LINUX_32BIT))
|
|
|
|
#else
|
|
|
|
/*
|
|
* All iWMMXt capable CPUs don't support 26-bit mode. Yet they can run
|
|
* legacy binaries which used to contain FPA11 floating point instructions
|
|
* that have always been emulated by the kernel. PFA11 and iWMMXt overlap
|
|
* on coprocessor 1 space though. We therefore must decide if given task
|
|
* is allowed to use CP 0 and 1 for iWMMXt, or if they should be blocked
|
|
* at all times for the prefetch exception handler to catch FPA11 opcodes
|
|
* and emulate them. The best indication to discriminate those two cases
|
|
* is the SOFT_FLOAT flag in the ELF header.
|
|
*/
|
|
|
|
#define SET_PERSONALITY(ex,ibcs2) \
|
|
do { \
|
|
set_personality(PER_LINUX_32BIT); \
|
|
if (((ex).e_flags & EF_ARM_EABI_MASK) || \
|
|
((ex).e_flags & EF_ARM_SOFT_FLOAT)) \
|
|
set_thread_flag(TIF_USING_IWMMXT); \
|
|
else \
|
|
clear_thread_flag(TIF_USING_IWMMXT); \
|
|
} while (0)
|
|
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#endif
|