5 * ELF register definitions..
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
12 #include <asm/ptrace.h>
14 #define ELF_NGREG 48 /* includes nip, msr, lr, etc. */
15 #define ELF_NFPREG 33 /* includes fpscr */
16 #define ELF_NVRREG 33 /* includes vscr */
18 typedef unsigned long elf_greg_t64;
19 typedef elf_greg_t64 elf_gregset_t64[ELF_NGREG];
21 typedef unsigned int elf_greg_t32;
22 typedef elf_greg_t32 elf_gregset_t32[ELF_NGREG];
25 * These are used to set parameters in the core dumps.
28 # define ELF_ARCH EM_PPC64
29 # define ELF_CLASS ELFCLASS64
30 # define ELF_DATA ELFDATA2MSB
31 typedef elf_greg_t64 elf_greg_t;
32 typedef elf_gregset_t64 elf_gregset_t;
33 # define elf_addr_t unsigned long
34 # define elf_caddr_t char *
36 /* Assumption: ELF_ARCH == EM_PPC and ELF_CLASS == ELFCLASS32 */
37 typedef elf_greg_t32 elf_greg_t;
38 typedef elf_gregset_t32 elf_gregset_t;
39 # define elf_addr_t u32
40 # define elf_caddr_t u32
43 typedef double elf_fpreg_t;
44 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
49 * This is used to ensure we don't load something for the wrong architecture.
51 #define elf_check_arch(x) ((x)->e_machine == ELF_ARCH)
53 #define USE_ELF_CORE_DUMP
54 #define ELF_EXEC_PAGESIZE 4096
56 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical
57 use of this is to invoke "./ld.so someprog" to test out a new version of
58 the loader. We need to make sure that it is out of the way of the program
59 that it will "exec", and that there is sufficient room for the brk. */
61 #define ELF_ET_DYN_BASE (0x08000000)
63 /* Common routine for both 32-bit and 64-bit processes */
64 #define ELF_CORE_COPY_REGS(gregs, regs) elf_core_copy_regs(gregs, regs);
66 elf_core_copy_regs(elf_gregset_t dstRegs, struct pt_regs* srcRegs)
70 int numGPRS = ((sizeof(struct pt_regs)/sizeof(elf_greg_t64)) < ELF_NGREG) ? (sizeof(struct pt_regs)/sizeof(elf_greg_t64)) : ELF_NGREG;
72 for (i=0; i < numGPRS; i++)
73 dstRegs[i] = (elf_greg_t)((elf_greg_t64 *)srcRegs)[i];
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 userspace,
78 but it's not easy, and we've already done it here. */
82 /* This yields a string that ld.so will use to load implementation
83 specific libraries for optimization. This is more specific in
84 intent than poking at uname or /proc/cpuinfo.
86 For the moment, we have only optimizations for the Intel generations,
87 but that could change... */
89 #define ELF_PLATFORM (NULL)
92 #define ELF_PLAT_INIT(_r, interp_load_addr) do { \
93 memset(_r->gpr, 0, sizeof(_r->gpr)); \
94 _r->ctr = _r->link = _r->xer = _r->ccr = 0; \
95 _r->gpr[2] = interp_load_addr; \
100 #define SET_PERSONALITY(ex, ibcs2) \
101 do { if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \
102 current->thread.flags |= PPC_FLAG_32BIT; \
104 current->thread.flags &= ~PPC_FLAG_32BIT; \
106 set_personality(PER_SVR4); \
107 else if (current->personality != PER_LINUX32) \
108 set_personality(PER_LINUX); \
112 * We need to put in some extra aux table entries to tell glibc what
113 * the cache block size is, so it can use the dcbz instruction safely.
115 #define AT_DCACHEBSIZE 19
116 #define AT_ICACHEBSIZE 20
117 #define AT_UCACHEBSIZE 21
118 /* A special ignored type value for PPC, for glibc compatibility. */
119 #define AT_IGNOREPPC 22
121 extern int dcache_bsize;
122 extern int icache_bsize;
123 extern int ucache_bsize;
126 * The requirements here are:
127 * - keep the final alignment of sp (sp & 0xf)
128 * - make sure the 32-bit value at the first 16 byte aligned position of
129 * AUXV is greater than 16 for glibc compatibility.
130 * AT_IGNOREPPC is used for that.
131 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
132 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
134 #define DLINFO_ARCH_ITEMS 3
135 #define ARCH_DLINFO \
137 sp -= DLINFO_ARCH_ITEMS * 2; \
138 NEW_AUX_ENT(0, AT_DCACHEBSIZE, dcache_bsize); \
139 NEW_AUX_ENT(1, AT_ICACHEBSIZE, icache_bsize); \
140 NEW_AUX_ENT(2, AT_UCACHEBSIZE, ucache_bsize); \
142 * Now handle glibc compatibility. \
145 NEW_AUX_ENT(0, AT_IGNOREPPC, AT_IGNOREPPC); \
146 NEW_AUX_ENT(1, AT_IGNOREPPC, AT_IGNOREPPC); \
149 #endif /* __KERNEL__ */
150 #endif /* __PPC64_ELF_H */