File: /usr/src/linux/include/asm-parisc/elf.h

1     #ifndef __ASMPARISC_ELF_H
2     #define __ASMPARISC_ELF_H
3     
4     /*
5      * ELF register definitions..
6      */
7     
8     #include <asm/ptrace.h>
9     
10     #define EM_PARISC 15
11     
12     #define ELF_NGREG 32
13     #define ELF_NFPREG 32
14     
15     typedef unsigned long elf_greg_t;
16     typedef elf_greg_t elf_gregset_t[ELF_NGREG];
17     
18     typedef double elf_fpreg_t;
19     typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
20     
21     #define ELF_CORE_COPY_REGS(gregs, regs) \
22     	memcpy(gregs, regs, \
23     	       sizeof(struct pt_regs) < sizeof(elf_gregset_t)? \
24     	       sizeof(struct pt_regs): sizeof(elf_gregset_t));
25     
26     /*
27      * This is used to ensure we don't load something for the wrong architecture.
28      *
29      * Note that this header file is used by default in fs/binfmt_elf.c. So
30      * the following macros are for the default case. However, for the 64
31      * bit kernel we also support 32 bit parisc binaries. To do that
32      * arch/parisc64/kernel/binfmt_elf32.c defines its own set of these
33      * macros, and then if includes fs/binfmt_elf.c to provide an alternate
34      * elf binary handler for 32 bit binaries (on the 64 bit kernel).
35      */
36     
37     #ifdef __LP64__
38     #define ELF_CLASS       ELFCLASS64
39     #else
40     #define ELF_CLASS	ELFCLASS32
41     #endif
42     
43     #define elf_check_arch(x) ((x)->e_machine == EM_PARISC && (x)->e_ident[EI_CLASS] == ELF_CLASS)
44     
45     /*
46      * These are used to set parameters in the core dumps.
47      */
48     #define ELF_DATA	ELFDATA2MSB
49     #define ELF_ARCH	EM_PARISC
50     
51     /* %r23 is set by ld.so to a pointer to a function which might be 
52        registered using atexit.  This provides a mean for the dynamic
53        linker to call DT_FINI functions for shared libraries that have
54        been loaded before the code runs.
55     
56        So that we can use the same startup file with static executables,
57        we start programs with a value of 0 to indicate that there is no
58        such function.  */
59     #define ELF_PLAT_INIT(_r)       _r->gr[23] = 0
60     
61     #define USE_ELF_CORE_DUMP
62     #define ELF_EXEC_PAGESIZE	4096
63     
64     /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
65        use of this is to invoke "./ld.so someprog" to test out a new version of
66        the loader.  We need to make sure that it is out of the way of the program
67        that it will "exec", and that there is sufficient room for the brk.
68     
69        (2 * TASK_SIZE / 3) turns into something undefined when run through a
70        32 bit preprocessor and in some cases results in the kernel trying to map
71        ld.so to the kernel virtual base. Use a sane value instead. /Jes 
72       */
73     
74     #define ELF_ET_DYN_BASE         (TASK_UNMAPPED_BASE + 0x01000000)
75     
76     /* This yields a mask that user programs can use to figure out what
77        instruction set this CPU supports.  This could be done in user space,
78        but it's not easy, and we've already done it here.  */
79     
80     #define ELF_HWCAP	0
81     /* (boot_cpu_data.x86_capability) */
82     
83     /* This yields a string that ld.so will use to load implementation
84        specific libraries for optimization.  This is more specific in
85        intent than poking at uname or /proc/cpuinfo.
86     
87        For the moment, we have only optimizations for the Intel generations,
88        but that could change... */
89     
90     #define ELF_PLATFORM  ("PARISC\0" /*+((boot_cpu_data.x86-3)*5) */)
91     
92     #ifdef __KERNEL__
93     #define SET_PERSONALITY(ex, ibcs2) \
94     	current->personality = PER_LINUX
95     #endif
96     
97     #endif
98