6 * ELF register definitions..
8 #include <asm/ptrace.h>
11 typedef unsigned long elf_greg_t;
12 typedef unsigned long elf_freg_t[3];
14 #define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
15 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
17 typedef struct user_fp elf_fpregset_t;
21 #define EF_ARM_APCS26 0x08
22 #define EF_ARM_SOFT_FLOAT 0x200
23 #define EF_ARM_EABI_MASK 0xFF000000
29 #define R_ARM_JUMP24 29
32 * These are used to set parameters in the core dumps.
34 #define ELF_CLASS ELFCLASS32
36 #define ELF_DATA ELFDATA2MSB
38 #define ELF_DATA ELFDATA2LSB
40 #define ELF_ARCH EM_ARM
43 #include <asm/procinfo.h>
47 * This yields a mask that user programs can use to figure out what
48 * instruction set this cpu supports.
50 #define ELF_HWCAP (elf_hwcap)
51 extern unsigned int elf_hwcap;
54 * This yields a string that ld.so will use to load implementation
55 * specific libraries for optimization. This is more specific in
56 * intent than poking at uname or /proc/cpuinfo.
58 * For now we just provide a fairly general string that describes the
59 * processor family. This could be made more specific later if someone
60 * implemented optimisations that require it. 26-bit CPUs give you
61 * "v1l" for ARM2 (no SWP) and "v2l" for anything else (ARM1 isn't
62 * supported). 32-bit CPUs give you "v3[lb]" for anything based on an
63 * ARM6 or ARM7 core and "armv4[lb]" for anything based on a StrongARM-1
66 #define ELF_PLATFORM_SIZE 8
67 #define ELF_PLATFORM (elf_platform)
69 extern char elf_platform[];
73 * This is used to ensure we don't load something for the wrong architecture.
75 #define elf_check_arch(x) ((x)->e_machine == EM_ARM && ELF_PROC_OK(x))
78 * 32-bit code is always OK. Some cpus can do 26-bit, some can't.
80 #define ELF_PROC_OK(x) (ELF_THUMB_OK(x) && ELF_26BIT_OK(x))
82 #define ELF_THUMB_OK(x) \
83 ((elf_hwcap & HWCAP_THUMB && ((x)->e_entry & 1) == 1) || \
84 ((x)->e_entry & 3) == 0)
86 #define ELF_26BIT_OK(x) \
87 ((elf_hwcap & HWCAP_26BIT && (x)->e_flags & EF_ARM_APCS26) || \
88 ((x)->e_flags & EF_ARM_APCS26) == 0)
90 #define USE_ELF_CORE_DUMP
91 #define ELF_EXEC_PAGESIZE 4096
93 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical
94 use of this is to invoke "./ld.so someprog" to test out a new version of
95 the loader. We need to make sure that it is out of the way of the program
96 that it will "exec", and that there is sufficient room for the brk. */
98 #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
100 /* When the program starts, a1 contains a pointer to a function to be
101 registered with atexit, as per the SVR4 ABI. A value of 0 means we
102 have no such handler. */
103 #define ELF_PLAT_INIT(_r, load_addr) (_r)->ARM_r0 = 0
105 #ifndef CONFIG_IWMMXT
107 /* Old NetWinder binaries were compiled in such a way that the iBCS
108 heuristic always trips on them. Until these binaries become uncommon
109 enough not to care, don't trust the `ibcs' flag here. In any case
110 there is no other ELF system currently supported by iBCS.
111 @@ Could print a warning message to encourage users to upgrade. */
112 #define SET_PERSONALITY(ex,ibcs2) \
113 set_personality(((ex).e_flags & EF_ARM_APCS26 ? PER_LINUX : PER_LINUX_32BIT))
118 * All iWMMXt capable CPUs don't support 26-bit mode. Yet they can run
119 * legacy binaries which used to contain FPA11 floating point instructions
120 * that have always been emulated by the kernel. PFA11 and iWMMXt overlap
121 * on coprocessor 1 space though. We therefore must decide if given task
122 * is allowed to use CP 0 and 1 for iWMMXt, or if they should be blocked
123 * at all times for the prefetch exception handler to catch FPA11 opcodes
124 * and emulate them. The best indication to discriminate those two cases
125 * is the SOFT_FLOAT flag in the ELF header.
128 #define SET_PERSONALITY(ex,ibcs2) \
130 set_personality(PER_LINUX_32BIT); \
131 if (((ex).e_flags & EF_ARM_EABI_MASK) || \
132 ((ex).e_flags & EF_ARM_SOFT_FLOAT)) \
133 set_thread_flag(TIF_USING_IWMMXT); \
135 clear_thread_flag(TIF_USING_IWMMXT); \