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elf.h
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1 #ifndef __ASM_SH_ELF_H
2 #define __ASM_SH_ELF_H
3 
4 #include <linux/utsname.h>
5 #include <asm/auxvec.h>
6 #include <asm/ptrace.h>
7 #include <asm/user.h>
8 
9 /* ELF header e_flags defines */
10 #define EF_SH_PIC 0x100 /* -fpic */
11 #define EF_SH_FDPIC 0x8000 /* -mfdpic */
12 
13 /* SH (particularly SHcompact) relocation types */
14 #define R_SH_NONE 0
15 #define R_SH_DIR32 1
16 #define R_SH_REL32 2
17 #define R_SH_DIR8WPN 3
18 #define R_SH_IND12W 4
19 #define R_SH_DIR8WPL 5
20 #define R_SH_DIR8WPZ 6
21 #define R_SH_DIR8BP 7
22 #define R_SH_DIR8W 8
23 #define R_SH_DIR8L 9
24 #define R_SH_SWITCH16 25
25 #define R_SH_SWITCH32 26
26 #define R_SH_USES 27
27 #define R_SH_COUNT 28
28 #define R_SH_ALIGN 29
29 #define R_SH_CODE 30
30 #define R_SH_DATA 31
31 #define R_SH_LABEL 32
32 #define R_SH_SWITCH8 33
33 #define R_SH_GNU_VTINHERIT 34
34 #define R_SH_GNU_VTENTRY 35
35 #define R_SH_TLS_GD_32 144
36 #define R_SH_TLS_LD_32 145
37 #define R_SH_TLS_LDO_32 146
38 #define R_SH_TLS_IE_32 147
39 #define R_SH_TLS_LE_32 148
40 #define R_SH_TLS_DTPMOD32 149
41 #define R_SH_TLS_DTPOFF32 150
42 #define R_SH_TLS_TPOFF32 151
43 #define R_SH_GOT32 160
44 #define R_SH_PLT32 161
45 #define R_SH_COPY 162
46 #define R_SH_GLOB_DAT 163
47 #define R_SH_JMP_SLOT 164
48 #define R_SH_RELATIVE 165
49 #define R_SH_GOTOFF 166
50 #define R_SH_GOTPC 167
51 
52 /* FDPIC relocs */
53 #define R_SH_GOT20 201
54 #define R_SH_GOTOFF20 202
55 #define R_SH_GOTFUNCDESC 203
56 #define R_SH_GOTFUNCDESC20 204
57 #define R_SH_GOTOFFFUNCDESC 205
58 #define R_SH_GOTOFFFUNCDESC20 206
59 #define R_SH_FUNCDESC 207
60 #define R_SH_FUNCDESC_VALUE 208
61 
62 /* SHmedia relocs */
63 #define R_SH_IMM_LOW16 246
64 #define R_SH_IMM_LOW16_PCREL 247
65 #define R_SH_IMM_MEDLOW16 248
66 #define R_SH_IMM_MEDLOW16_PCREL 249
67 /* Keep this the last entry. */
68 #define R_SH_NUM 256
69 
70 /*
71  * ELF register definitions..
72  */
73 
74 typedef unsigned long elf_greg_t;
75 
76 #define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
77 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
78 
79 typedef struct user_fpu_struct elf_fpregset_t;
80 
81 /*
82  * These are used to set parameters in the core dumps.
83  */
84 #define ELF_CLASS ELFCLASS32
85 #ifdef __LITTLE_ENDIAN__
86 #define ELF_DATA ELFDATA2LSB
87 #else
88 #define ELF_DATA ELFDATA2MSB
89 #endif
90 #define ELF_ARCH EM_SH
91 
92 #ifdef __KERNEL__
93 /*
94  * This is used to ensure we don't load something for the wrong architecture.
95  */
96 #define elf_check_arch(x) ((x)->e_machine == EM_SH)
97 #define elf_check_fdpic(x) ((x)->e_flags & EF_SH_FDPIC)
98 #define elf_check_const_displacement(x) ((x)->e_flags & EF_SH_PIC)
99 
100 /*
101  * Enable dump using regset.
102  * This covers all of general/DSP/FPU regs.
103  */
104 #define CORE_DUMP_USE_REGSET
105 
106 #define ELF_FDPIC_CORE_EFLAGS EF_SH_FDPIC
107 #define ELF_EXEC_PAGESIZE PAGE_SIZE
108 
109 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical
110  use of this is to invoke "./ld.so someprog" to test out a new version of
111  the loader. We need to make sure that it is out of the way of the program
112  that it will "exec", and that there is sufficient room for the brk. */
113 
114 #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
115 
116 #define ELF_CORE_COPY_REGS(_dest,_regs) \
117  memcpy((char *) &_dest, (char *) _regs, \
118  sizeof(struct pt_regs));
119 
120 /* This yields a mask that user programs can use to figure out what
121  instruction set this CPU supports. This could be done in user space,
122  but it's not easy, and we've already done it here. */
123 
124 #define ELF_HWCAP (boot_cpu_data.flags)
125 
126 /* This yields a string that ld.so will use to load implementation
127  specific libraries for optimization. This is more specific in
128  intent than poking at uname or /proc/cpuinfo.
129 
130  For the moment, we have only optimizations for the Intel generations,
131  but that could change... */
132 
133 #define ELF_PLATFORM (utsname()->machine)
134 
135 #ifdef __SH5__
136 #define ELF_PLAT_INIT(_r, load_addr) \
137  do { _r->regs[0]=0; _r->regs[1]=0; _r->regs[2]=0; _r->regs[3]=0; \
138  _r->regs[4]=0; _r->regs[5]=0; _r->regs[6]=0; _r->regs[7]=0; \
139  _r->regs[8]=0; _r->regs[9]=0; _r->regs[10]=0; _r->regs[11]=0; \
140  _r->regs[12]=0; _r->regs[13]=0; _r->regs[14]=0; _r->regs[15]=0; \
141  _r->regs[16]=0; _r->regs[17]=0; _r->regs[18]=0; _r->regs[19]=0; \
142  _r->regs[20]=0; _r->regs[21]=0; _r->regs[22]=0; _r->regs[23]=0; \
143  _r->regs[24]=0; _r->regs[25]=0; _r->regs[26]=0; _r->regs[27]=0; \
144  _r->regs[28]=0; _r->regs[29]=0; _r->regs[30]=0; _r->regs[31]=0; \
145  _r->regs[32]=0; _r->regs[33]=0; _r->regs[34]=0; _r->regs[35]=0; \
146  _r->regs[36]=0; _r->regs[37]=0; _r->regs[38]=0; _r->regs[39]=0; \
147  _r->regs[40]=0; _r->regs[41]=0; _r->regs[42]=0; _r->regs[43]=0; \
148  _r->regs[44]=0; _r->regs[45]=0; _r->regs[46]=0; _r->regs[47]=0; \
149  _r->regs[48]=0; _r->regs[49]=0; _r->regs[50]=0; _r->regs[51]=0; \
150  _r->regs[52]=0; _r->regs[53]=0; _r->regs[54]=0; _r->regs[55]=0; \
151  _r->regs[56]=0; _r->regs[57]=0; _r->regs[58]=0; _r->regs[59]=0; \
152  _r->regs[60]=0; _r->regs[61]=0; _r->regs[62]=0; \
153  _r->tregs[0]=0; _r->tregs[1]=0; _r->tregs[2]=0; _r->tregs[3]=0; \
154  _r->tregs[4]=0; _r->tregs[5]=0; _r->tregs[6]=0; _r->tregs[7]=0; \
155  _r->sr = SR_FD | SR_MMU; } while (0)
156 #else
157 #define ELF_PLAT_INIT(_r, load_addr) \
158  do { _r->regs[0]=0; _r->regs[1]=0; _r->regs[2]=0; _r->regs[3]=0; \
159  _r->regs[4]=0; _r->regs[5]=0; _r->regs[6]=0; _r->regs[7]=0; \
160  _r->regs[8]=0; _r->regs[9]=0; _r->regs[10]=0; _r->regs[11]=0; \
161  _r->regs[12]=0; _r->regs[13]=0; _r->regs[14]=0; \
162  _r->sr = SR_FD; } while (0)
163 
164 #define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, \
165  _dynamic_addr) \
166 do { \
167  _r->regs[0] = 0; \
168  _r->regs[1] = 0; \
169  _r->regs[2] = 0; \
170  _r->regs[3] = 0; \
171  _r->regs[4] = 0; \
172  _r->regs[5] = 0; \
173  _r->regs[6] = 0; \
174  _r->regs[7] = 0; \
175  _r->regs[8] = _exec_map_addr; \
176  _r->regs[9] = _interp_map_addr; \
177  _r->regs[10] = _dynamic_addr; \
178  _r->regs[11] = 0; \
179  _r->regs[12] = 0; \
180  _r->regs[13] = 0; \
181  _r->regs[14] = 0; \
182  _r->sr = SR_FD; \
183 } while (0)
184 #endif
185 
186 #define SET_PERSONALITY(ex) \
187  set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))
188 
189 #ifdef CONFIG_VSYSCALL
190 /* vDSO has arch_setup_additional_pages */
191 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES
192 struct linux_binprm;
193 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
194  int uses_interp);
195 
196 extern unsigned int vdso_enabled;
197 extern void __kernel_vsyscall;
198 
199 #define VDSO_BASE ((unsigned long)current->mm->context.vdso)
200 #define VDSO_SYM(x) (VDSO_BASE + (unsigned long)(x))
201 
202 #define VSYSCALL_AUX_ENT \
203  if (vdso_enabled) \
204  NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE); \
205  else \
206  NEW_AUX_ENT(AT_IGNORE, 0);
207 #else
208 #define VSYSCALL_AUX_ENT
209 #endif /* CONFIG_VSYSCALL */
210 
211 #ifdef CONFIG_SH_FPU
212 #define FPU_AUX_ENT NEW_AUX_ENT(AT_FPUCW, FPSCR_INIT)
213 #else
214 #define FPU_AUX_ENT NEW_AUX_ENT(AT_IGNORE, 0)
215 #endif
216 
217 extern int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
218 
219 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
220 #define ARCH_DLINFO \
221 do { \
222  /* Optional FPU initialization */ \
223  FPU_AUX_ENT; \
224  \
225  /* Optional vsyscall entry */ \
226  VSYSCALL_AUX_ENT; \
227  \
228  /* Cache desc */ \
229  NEW_AUX_ENT(AT_L1I_CACHESHAPE, l1i_cache_shape); \
230  NEW_AUX_ENT(AT_L1D_CACHESHAPE, l1d_cache_shape); \
231  NEW_AUX_ENT(AT_L2_CACHESHAPE, l2_cache_shape); \
232 } while (0)
233 
234 #endif /* __KERNEL__ */
235 #endif /* __ASM_SH_ELF_H */
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