1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_SH_ELF_H 3 #define __ASM_SH_ELF_H 4 5 #include <linux/utsname.h> 6 #include <asm/auxvec.h> 7 #include <asm/ptrace.h> 8 #include <asm/user.h> 9 10 /* ELF header e_flags defines */ 11 #define EF_SH_PIC 0x100 /* -fpic */ 12 #define EF_SH_FDPIC 0x8000 /* -mfdpic */ 13 14 /* SH (particularly SHcompact) relocation types */ 15 #define R_SH_NONE 0 16 #define R_SH_DIR32 1 17 #define R_SH_REL32 2 18 #define R_SH_DIR8WPN 3 19 #define R_SH_IND12W 4 20 #define R_SH_DIR8WPL 5 21 #define R_SH_DIR8WPZ 6 22 #define R_SH_DIR8BP 7 23 #define R_SH_DIR8W 8 24 #define R_SH_DIR8L 9 25 #define R_SH_SWITCH16 25 26 #define R_SH_SWITCH32 26 27 #define R_SH_USES 27 28 #define R_SH_COUNT 28 29 #define R_SH_ALIGN 29 30 #define R_SH_CODE 30 31 #define R_SH_DATA 31 32 #define R_SH_LABEL 32 33 #define R_SH_SWITCH8 33 34 #define R_SH_GNU_VTINHERIT 34 35 #define R_SH_GNU_VTENTRY 35 36 #define R_SH_TLS_GD_32 144 37 #define R_SH_TLS_LD_32 145 38 #define R_SH_TLS_LDO_32 146 39 #define R_SH_TLS_IE_32 147 40 #define R_SH_TLS_LE_32 148 41 #define R_SH_TLS_DTPMOD32 149 42 #define R_SH_TLS_DTPOFF32 150 43 #define R_SH_TLS_TPOFF32 151 44 #define R_SH_GOT32 160 45 #define R_SH_PLT32 161 46 #define R_SH_COPY 162 47 #define R_SH_GLOB_DAT 163 48 #define R_SH_JMP_SLOT 164 49 #define R_SH_RELATIVE 165 50 #define R_SH_GOTOFF 166 51 #define R_SH_GOTPC 167 52 53 /* FDPIC relocs */ 54 #define R_SH_GOT20 201 55 #define R_SH_GOTOFF20 202 56 #define R_SH_GOTFUNCDESC 203 57 #define R_SH_GOTFUNCDESC20 204 58 #define R_SH_GOTOFFFUNCDESC 205 59 #define R_SH_GOTOFFFUNCDESC20 206 60 #define R_SH_FUNCDESC 207 61 #define R_SH_FUNCDESC_VALUE 208 62 63 /* SHmedia relocs */ 64 #define R_SH_IMM_LOW16 246 65 #define R_SH_IMM_LOW16_PCREL 247 66 #define R_SH_IMM_MEDLOW16 248 67 #define R_SH_IMM_MEDLOW16_PCREL 249 68 /* Keep this the last entry. */ 69 #define R_SH_NUM 256 70 71 /* 72 * ELF register definitions.. 73 */ 74 75 typedef unsigned long elf_greg_t; 76 77 #define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t)) 78 typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 79 80 typedef struct user_fpu_struct elf_fpregset_t; 81 82 /* 83 * These are used to set parameters in the core dumps. 84 */ 85 #define ELF_CLASS ELFCLASS32 86 #ifdef __LITTLE_ENDIAN__ 87 #define ELF_DATA ELFDATA2LSB 88 #else 89 #define ELF_DATA ELFDATA2MSB 90 #endif 91 #define ELF_ARCH EM_SH 92 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 #define ELF_PLAT_INIT(_r, load_addr) \ 136 do { _r->regs[0]=0; _r->regs[1]=0; _r->regs[2]=0; _r->regs[3]=0; \ 137 _r->regs[4]=0; _r->regs[5]=0; _r->regs[6]=0; _r->regs[7]=0; \ 138 _r->regs[8]=0; _r->regs[9]=0; _r->regs[10]=0; _r->regs[11]=0; \ 139 _r->regs[12]=0; _r->regs[13]=0; _r->regs[14]=0; \ 140 _r->sr = SR_FD; } while (0) 141 142 #define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, \ 143 _dynamic_addr) \ 144 do { \ 145 _r->regs[0] = 0; \ 146 _r->regs[1] = 0; \ 147 _r->regs[2] = 0; \ 148 _r->regs[3] = 0; \ 149 _r->regs[4] = 0; \ 150 _r->regs[5] = 0; \ 151 _r->regs[6] = 0; \ 152 _r->regs[7] = 0; \ 153 _r->regs[8] = _exec_map_addr; \ 154 _r->regs[9] = _interp_map_addr; \ 155 _r->regs[10] = _dynamic_addr; \ 156 _r->regs[11] = 0; \ 157 _r->regs[12] = 0; \ 158 _r->regs[13] = 0; \ 159 _r->regs[14] = 0; \ 160 _r->sr = SR_FD; \ 161 } while (0) 162 163 #define SET_PERSONALITY(ex) \ 164 set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK))) 165 166 #ifdef CONFIG_VSYSCALL 167 /* vDSO has arch_setup_additional_pages */ 168 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 169 struct linux_binprm; 170 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 171 int uses_interp); 172 173 extern unsigned int vdso_enabled; 174 extern void __kernel_vsyscall; 175 176 #define VDSO_BASE ((unsigned long)current->mm->context.vdso) 177 #define VDSO_SYM(x) (VDSO_BASE + (unsigned long)(x)) 178 179 #define VSYSCALL_AUX_ENT \ 180 if (vdso_enabled) \ 181 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE); \ 182 else \ 183 NEW_AUX_ENT(AT_IGNORE, 0) 184 #else 185 #define VSYSCALL_AUX_ENT NEW_AUX_ENT(AT_IGNORE, 0) 186 #endif /* CONFIG_VSYSCALL */ 187 188 #ifdef CONFIG_SH_FPU 189 #define FPU_AUX_ENT NEW_AUX_ENT(AT_FPUCW, FPSCR_INIT) 190 #else 191 #define FPU_AUX_ENT NEW_AUX_ENT(AT_IGNORE, 0) 192 #endif 193 194 extern int l1i_cache_shape, l1d_cache_shape, l2_cache_shape; 195 196 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 197 #define ARCH_DLINFO \ 198 do { \ 199 /* Optional FPU initialization */ \ 200 FPU_AUX_ENT; \ 201 \ 202 /* Optional vsyscall entry */ \ 203 VSYSCALL_AUX_ENT; \ 204 \ 205 /* Cache desc */ \ 206 NEW_AUX_ENT(AT_L1I_CACHESHAPE, l1i_cache_shape); \ 207 NEW_AUX_ENT(AT_L1D_CACHESHAPE, l1d_cache_shape); \ 208 NEW_AUX_ENT(AT_L2_CACHESHAPE, l2_cache_shape); \ 209 } while (0) 210 211 #endif /* __ASM_SH_ELF_H */ 212