1 #ifndef __ASM_ALPHA_ELF_H
2 #define __ASM_ALPHA_ELF_H
3
4 /*
5 * ELF register definitions..
6 */
7
8 /*
9 * The OSF/1 version of <sys/procfs.h> makes gregset_t 46 entries long.
10 * I have no idea why that is so. For now, we just leave it at 33
11 * (32 general regs + processor status word).
12 */
13 #define ELF_NGREG 33
14 #define ELF_NFPREG 32
15
16 typedef unsigned long elf_greg_t;
17 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
18
19 typedef double elf_fpreg_t;
20 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
21
22 /*
23 * This is used to ensure we don't load something for the wrong architecture.
24 */
25 #define elf_check_arch(x) ((x)->e_machine == EM_ALPHA)
26
27 /*
28 * These are used to set parameters in the core dumps.
29 */
30 #define ELF_CLASS ELFCLASS64
31 #define ELF_DATA ELFDATA2LSB
32 #define ELF_ARCH EM_ALPHA
33
34 #define USE_ELF_CORE_DUMP
35 #define ELF_EXEC_PAGESIZE 8192
36
37 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical
38 use of this is to invoke "./ld.so someprog" to test out a new version of
39 the loader. We need to make sure that it is out of the way of the program
40 that it will "exec", and that there is sufficient room for the brk. */
41
42 #define ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000)
43
44 /* $0 is set by ld.so to a pointer to a function which might be
45 registered using atexit. This provides a mean for the dynamic
46 linker to call DT_FINI functions for shared libraries that have
47 been loaded before the code runs.
48
49 So that we can use the same startup file with static executables,
50 we start programs with a value of 0 to indicate that there is no
51 such function. */
52
53 #define ELF_PLAT_INIT(_r) _r->r0 = 0
54
55 /* Use the same format as the OSF/1 procfs interface. The register
56 layout is sane. However, since dump_thread() creates the funky
57 layout that ECOFF coredumps want, we need to undo that layout here.
58 Eventually, it would be nice if the ECOFF core-dump had to do the
59 translation, then ELF_CORE_COPY_REGS() would become trivial and
60 faster. */
61 #define ELF_CORE_COPY_REGS(_dest,_regs) \
62 { \
63 struct user _dump; \
64 \
65 dump_thread(_regs, &_dump); \
66 _dest[ 0] = _dump.regs[EF_V0]; \
67 _dest[ 1] = _dump.regs[EF_T0]; \
68 _dest[ 2] = _dump.regs[EF_T1]; \
69 _dest[ 3] = _dump.regs[EF_T2]; \
70 _dest[ 4] = _dump.regs[EF_T3]; \
71 _dest[ 5] = _dump.regs[EF_T4]; \
72 _dest[ 6] = _dump.regs[EF_T5]; \
73 _dest[ 7] = _dump.regs[EF_T6]; \
74 _dest[ 8] = _dump.regs[EF_T7]; \
75 _dest[ 9] = _dump.regs[EF_S0]; \
76 _dest[10] = _dump.regs[EF_S1]; \
77 _dest[11] = _dump.regs[EF_S2]; \
78 _dest[12] = _dump.regs[EF_S3]; \
79 _dest[13] = _dump.regs[EF_S4]; \
80 _dest[14] = _dump.regs[EF_S5]; \
81 _dest[15] = _dump.regs[EF_S6]; \
82 _dest[16] = _dump.regs[EF_A0]; \
83 _dest[17] = _dump.regs[EF_A1]; \
84 _dest[18] = _dump.regs[EF_A2]; \
85 _dest[19] = _dump.regs[EF_A3]; \
86 _dest[20] = _dump.regs[EF_A4]; \
87 _dest[21] = _dump.regs[EF_A5]; \
88 _dest[22] = _dump.regs[EF_T8]; \
89 _dest[23] = _dump.regs[EF_T9]; \
90 _dest[24] = _dump.regs[EF_T10]; \
91 _dest[25] = _dump.regs[EF_T11]; \
92 _dest[26] = _dump.regs[EF_RA]; \
93 _dest[27] = _dump.regs[EF_T12]; \
94 _dest[28] = _dump.regs[EF_AT]; \
95 _dest[29] = _dump.regs[EF_GP]; \
96 _dest[30] = _dump.regs[EF_SP]; \
97 _dest[31] = _dump.regs[EF_PC]; /* store PC here */ \
98 _dest[32] = _dump.regs[EF_PS]; \
99 }
100
101 /* This yields a mask that user programs can use to figure out what
102 instruction set this CPU supports. This is trivial on Alpha,
103 but not so on other machines. */
104
105 #define ELF_HWCAP \
106 ({ \
107 /* Sadly, most folks don't yet have assemblers that know about \
108 amask. This is "amask v0, v0" */ \
109 register long _v0 __asm("$0") = -1; \
110 __asm(".long 0x47e00c20" : "=r"(_v0) : ""(_v0)); \
111 ~_v0; \
112 })
113
114 /* This yields a string that ld.so will use to load implementation
115 specific libraries for optimization. This is more specific in
116 intent than poking at uname or /proc/cpuinfo.
117
118 This might do with checking bwx simultaneously... */
119
120 #define ELF_PLATFORM \
121 ({ \
122 /* Or "implver v0" ... */ \
123 register long _v0 __asm("$0"); \
124 __asm(".long 0x47e03d80" : "=r"(_v0)); \
125 _v0 == 0 ? "ev4" : "ev5"; \
126 })
127
128 #ifdef __KERNEL__
129 #define SET_PERSONALITY(EX, IBCS2) \
130 set_personality(((EX).e_flags & EF_ALPHA_32BIT) \
131 ? PER_LINUX_32BIT : (IBCS2) ? PER_SVR4 : PER_LINUX)
132 #endif
133
134 #endif
135
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