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Linux/arch/sh/include/asm/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        NEW_AUX_ENT(AT_IGNORE, 0)
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 */
236 

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