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1da177e4 LT |
1 | #ifndef __PPC_ELF_H |
2 | #define __PPC_ELF_H | |
3 | ||
4 | /* | |
5 | * ELF register definitions.. | |
6 | */ | |
7 | #include <asm/types.h> | |
8 | #include <asm/ptrace.h> | |
9 | #include <asm/cputable.h> | |
10 | ||
11 | /* PowerPC relocations defined by the ABIs */ | |
12 | #define R_PPC_NONE 0 | |
13 | #define R_PPC_ADDR32 1 /* 32bit absolute address */ | |
14 | #define R_PPC_ADDR24 2 /* 26bit address, 2 bits ignored. */ | |
15 | #define R_PPC_ADDR16 3 /* 16bit absolute address */ | |
16 | #define R_PPC_ADDR16_LO 4 /* lower 16bit of absolute address */ | |
17 | #define R_PPC_ADDR16_HI 5 /* high 16bit of absolute address */ | |
18 | #define R_PPC_ADDR16_HA 6 /* adjusted high 16bit */ | |
19 | #define R_PPC_ADDR14 7 /* 16bit address, 2 bits ignored */ | |
20 | #define R_PPC_ADDR14_BRTAKEN 8 | |
21 | #define R_PPC_ADDR14_BRNTAKEN 9 | |
22 | #define R_PPC_REL24 10 /* PC relative 26 bit */ | |
23 | #define R_PPC_REL14 11 /* PC relative 16 bit */ | |
24 | #define R_PPC_REL14_BRTAKEN 12 | |
25 | #define R_PPC_REL14_BRNTAKEN 13 | |
26 | #define R_PPC_GOT16 14 | |
27 | #define R_PPC_GOT16_LO 15 | |
28 | #define R_PPC_GOT16_HI 16 | |
29 | #define R_PPC_GOT16_HA 17 | |
30 | #define R_PPC_PLTREL24 18 | |
31 | #define R_PPC_COPY 19 | |
32 | #define R_PPC_GLOB_DAT 20 | |
33 | #define R_PPC_JMP_SLOT 21 | |
34 | #define R_PPC_RELATIVE 22 | |
35 | #define R_PPC_LOCAL24PC 23 | |
36 | #define R_PPC_UADDR32 24 | |
37 | #define R_PPC_UADDR16 25 | |
38 | #define R_PPC_REL32 26 | |
39 | #define R_PPC_PLT32 27 | |
40 | #define R_PPC_PLTREL32 28 | |
41 | #define R_PPC_PLT16_LO 29 | |
42 | #define R_PPC_PLT16_HI 30 | |
43 | #define R_PPC_PLT16_HA 31 | |
44 | #define R_PPC_SDAREL16 32 | |
45 | #define R_PPC_SECTOFF 33 | |
46 | #define R_PPC_SECTOFF_LO 34 | |
47 | #define R_PPC_SECTOFF_HI 35 | |
48 | #define R_PPC_SECTOFF_HA 36 | |
49 | /* Keep this the last entry. */ | |
50 | #define R_PPC_NUM 37 | |
51 | ||
52 | #define ELF_NGREG 48 /* includes nip, msr, lr, etc. */ | |
53 | #define ELF_NFPREG 33 /* includes fpscr */ | |
54 | #define ELF_NVRREG 33 /* includes vscr */ | |
55 | #define ELF_NEVRREG 34 /* includes acc (as 2) */ | |
56 | ||
57 | /* | |
58 | * These are used to set parameters in the core dumps. | |
59 | */ | |
60 | #define ELF_ARCH EM_PPC | |
61 | #define ELF_CLASS ELFCLASS32 | |
62 | #define ELF_DATA ELFDATA2MSB | |
63 | ||
64 | /* General registers */ | |
65 | typedef unsigned long elf_greg_t; | |
66 | typedef elf_greg_t elf_gregset_t[ELF_NGREG]; | |
67 | ||
68 | /* Floating point registers */ | |
69 | typedef double elf_fpreg_t; | |
70 | typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; | |
71 | ||
72 | /* Altivec registers */ | |
73 | typedef __vector128 elf_vrreg_t; | |
74 | typedef elf_vrreg_t elf_vrregset_t[ELF_NVRREG]; | |
75 | ||
76 | #ifdef __KERNEL__ | |
77 | ||
78 | struct task_struct; | |
79 | ||
80 | /* | |
81 | * This is used to ensure we don't load something for the wrong architecture. | |
82 | */ | |
83 | ||
84 | #define elf_check_arch(x) ((x)->e_machine == EM_PPC) | |
85 | ||
86 | /* This is the location that an ET_DYN program is loaded if exec'ed. Typical | |
87 | use of this is to invoke "./ld.so someprog" to test out a new version of | |
88 | the loader. We need to make sure that it is out of the way of the program | |
89 | that it will "exec", and that there is sufficient room for the brk. */ | |
90 | ||
91 | #define ELF_ET_DYN_BASE (0x08000000) | |
92 | ||
93 | #define USE_ELF_CORE_DUMP | |
94 | #define ELF_EXEC_PAGESIZE 4096 | |
95 | ||
96 | #define ELF_CORE_COPY_REGS(gregs, regs) \ | |
97 | memcpy((gregs), (regs), sizeof(struct pt_regs)); \ | |
98 | memset((char *)(gregs) + sizeof(struct pt_regs), 0, \ | |
99 | sizeof(elf_gregset_t) - sizeof(struct pt_regs)); | |
100 | ||
101 | #define ELF_CORE_COPY_TASK_REGS(t, elfregs) \ | |
102 | ((t)->thread.regs? \ | |
103 | ({ ELF_CORE_COPY_REGS((elfregs), (t)->thread.regs); 1; }): 0) | |
104 | ||
105 | extern int dump_task_fpu(struct task_struct *t, elf_fpregset_t *fpu); | |
106 | #define ELF_CORE_COPY_FPREGS(t, fpu) dump_task_fpu((t), (fpu)) | |
107 | ||
108 | /* This yields a mask that user programs can use to figure out what | |
109 | instruction set this cpu supports. This could be done in userspace, | |
110 | but it's not easy, and we've already done it here. */ | |
111 | ||
112 | #define ELF_HWCAP (cur_cpu_spec[0]->cpu_user_features) | |
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 | For the moment, we have only optimizations for the Intel generations, | |
119 | but that could change... */ | |
120 | ||
121 | #define ELF_PLATFORM (NULL) | |
122 | ||
123 | #define SET_PERSONALITY(ex, ibcs2) set_personality((ibcs2)?PER_SVR4:PER_LINUX) | |
124 | ||
125 | /* | |
126 | * We need to put in some extra aux table entries to tell glibc what | |
127 | * the cache block size is, so it can use the dcbz instruction safely. | |
128 | */ | |
129 | #define AT_DCACHEBSIZE 19 | |
130 | #define AT_ICACHEBSIZE 20 | |
131 | #define AT_UCACHEBSIZE 21 | |
132 | /* A special ignored type value for PPC, for glibc compatibility. */ | |
133 | #define AT_IGNOREPPC 22 | |
134 | ||
135 | extern int dcache_bsize; | |
136 | extern int icache_bsize; | |
137 | extern int ucache_bsize; | |
138 | ||
139 | /* | |
140 | * The requirements here are: | |
141 | * - keep the final alignment of sp (sp & 0xf) | |
142 | * - make sure the 32-bit value at the first 16 byte aligned position of | |
143 | * AUXV is greater than 16 for glibc compatibility. | |
144 | * AT_IGNOREPPC is used for that. | |
145 | * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC, | |
146 | * even if DLINFO_ARCH_ITEMS goes to zero or is undefined. | |
147 | */ | |
148 | #define ARCH_DLINFO \ | |
149 | do { \ | |
150 | /* Handle glibc compatibility. */ \ | |
151 | NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ | |
152 | NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ | |
153 | /* Cache size items */ \ | |
154 | NEW_AUX_ENT(AT_DCACHEBSIZE, dcache_bsize); \ | |
155 | NEW_AUX_ENT(AT_ICACHEBSIZE, icache_bsize); \ | |
156 | NEW_AUX_ENT(AT_UCACHEBSIZE, ucache_bsize); \ | |
157 | } while (0) | |
158 | ||
159 | #endif /* __KERNEL__ */ | |
160 | #endif |