- #ifndef __ASMARM_ELF_H
- #define __ASMARM_ELF_H
- #include <linux/config.h>
- /*
- * ELF register definitions..
- */
- #include <asm/ptrace.h>
- #include <asm/user.h>
- #include <asm/procinfo.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 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;
- /*
- * 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))) )
- /*
- * 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
- #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)
- #ifdef __KERNEL__
- /*
- * 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