1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * S390 version 4 * 5 * Derived from "include/asm-i386/elf.h" 6 */ 7 8 #ifndef __ASMS390_ELF_H 9 #define __ASMS390_ELF_H 10 11 /* s390 relocations defined by the ABIs */ 12 #define R_390_NONE 0 /* No reloc. */ 13 #define R_390_8 1 /* Direct 8 bit. */ 14 #define R_390_12 2 /* Direct 12 bit. */ 15 #define R_390_16 3 /* Direct 16 bit. */ 16 #define R_390_32 4 /* Direct 32 bit. */ 17 #define R_390_PC32 5 /* PC relative 32 bit. */ 18 #define R_390_GOT12 6 /* 12 bit GOT offset. */ 19 #define R_390_GOT32 7 /* 32 bit GOT offset. */ 20 #define R_390_PLT32 8 /* 32 bit PC relative PLT address. */ 21 #define R_390_COPY 9 /* Copy symbol at runtime. */ 22 #define R_390_GLOB_DAT 10 /* Create GOT entry. */ 23 #define R_390_JMP_SLOT 11 /* Create PLT entry. */ 24 #define R_390_RELATIVE 12 /* Adjust by program base. */ 25 #define R_390_GOTOFF32 13 /* 32 bit offset to GOT. */ 26 #define R_390_GOTPC 14 /* 32 bit PC rel. offset to GOT. */ 27 #define R_390_GOT16 15 /* 16 bit GOT offset. */ 28 #define R_390_PC16 16 /* PC relative 16 bit. */ 29 #define R_390_PC16DBL 17 /* PC relative 16 bit shifted by 1. */ 30 #define R_390_PLT16DBL 18 /* 16 bit PC rel. PLT shifted by 1. */ 31 #define R_390_PC32DBL 19 /* PC relative 32 bit shifted by 1. */ 32 #define R_390_PLT32DBL 20 /* 32 bit PC rel. PLT shifted by 1. */ 33 #define R_390_GOTPCDBL 21 /* 32 bit PC rel. GOT shifted by 1. */ 34 #define R_390_64 22 /* Direct 64 bit. */ 35 #define R_390_PC64 23 /* PC relative 64 bit. */ 36 #define R_390_GOT64 24 /* 64 bit GOT offset. */ 37 #define R_390_PLT64 25 /* 64 bit PC relative PLT address. */ 38 #define R_390_GOTENT 26 /* 32 bit PC rel. to GOT entry >> 1. */ 39 #define R_390_GOTOFF16 27 /* 16 bit offset to GOT. */ 40 #define R_390_GOTOFF64 28 /* 64 bit offset to GOT. */ 41 #define R_390_GOTPLT12 29 /* 12 bit offset to jump slot. */ 42 #define R_390_GOTPLT16 30 /* 16 bit offset to jump slot. */ 43 #define R_390_GOTPLT32 31 /* 32 bit offset to jump slot. */ 44 #define R_390_GOTPLT64 32 /* 64 bit offset to jump slot. */ 45 #define R_390_GOTPLTENT 33 /* 32 bit rel. offset to jump slot. */ 46 #define R_390_PLTOFF16 34 /* 16 bit offset from GOT to PLT. */ 47 #define R_390_PLTOFF32 35 /* 32 bit offset from GOT to PLT. */ 48 #define R_390_PLTOFF64 36 /* 16 bit offset from GOT to PLT. */ 49 #define R_390_TLS_LOAD 37 /* Tag for load insn in TLS code. */ 50 #define R_390_TLS_GDCALL 38 /* Tag for function call in general 51 dynamic TLS code. */ 52 #define R_390_TLS_LDCALL 39 /* Tag for function call in local 53 dynamic TLS code. */ 54 #define R_390_TLS_GD32 40 /* Direct 32 bit for general dynamic 55 thread local data. */ 56 #define R_390_TLS_GD64 41 /* Direct 64 bit for general dynamic 57 thread local data. */ 58 #define R_390_TLS_GOTIE12 42 /* 12 bit GOT offset for static TLS 59 block offset. */ 60 #define R_390_TLS_GOTIE32 43 /* 32 bit GOT offset for static TLS 61 block offset. */ 62 #define R_390_TLS_GOTIE64 44 /* 64 bit GOT offset for static TLS 63 block offset. */ 64 #define R_390_TLS_LDM32 45 /* Direct 32 bit for local dynamic 65 thread local data in LD code. */ 66 #define R_390_TLS_LDM64 46 /* Direct 64 bit for local dynamic 67 thread local data in LD code. */ 68 #define R_390_TLS_IE32 47 /* 32 bit address of GOT entry for 69 negated static TLS block offset. */ 70 #define R_390_TLS_IE64 48 /* 64 bit address of GOT entry for 71 negated static TLS block offset. */ 72 #define R_390_TLS_IEENT 49 /* 32 bit rel. offset to GOT entry for 73 negated static TLS block offset. */ 74 #define R_390_TLS_LE32 50 /* 32 bit negated offset relative to 75 static TLS block. */ 76 #define R_390_TLS_LE64 51 /* 64 bit negated offset relative to 77 static TLS block. */ 78 #define R_390_TLS_LDO32 52 /* 32 bit offset relative to TLS 79 block. */ 80 #define R_390_TLS_LDO64 53 /* 64 bit offset relative to TLS 81 block. */ 82 #define R_390_TLS_DTPMOD 54 /* ID of module containing symbol. */ 83 #define R_390_TLS_DTPOFF 55 /* Offset in TLS block. */ 84 #define R_390_TLS_TPOFF 56 /* Negate offset in static TLS 85 block. */ 86 #define R_390_20 57 /* Direct 20 bit. */ 87 #define R_390_GOT20 58 /* 20 bit GOT offset. */ 88 #define R_390_GOTPLT20 59 /* 20 bit offset to jump slot. */ 89 #define R_390_TLS_GOTIE20 60 /* 20 bit GOT offset for static TLS 90 block offset. */ 91 /* Keep this the last entry. */ 92 #define R_390_NUM 61 93 94 /* Bits present in AT_HWCAP. */ 95 #define HWCAP_S390_ESAN3 1 96 #define HWCAP_S390_ZARCH 2 97 #define HWCAP_S390_STFLE 4 98 #define HWCAP_S390_MSA 8 99 #define HWCAP_S390_LDISP 16 100 #define HWCAP_S390_EIMM 32 101 #define HWCAP_S390_DFP 64 102 #define HWCAP_S390_HPAGE 128 103 #define HWCAP_S390_ETF3EH 256 104 #define HWCAP_S390_HIGH_GPRS 512 105 #define HWCAP_S390_TE 1024 106 #define HWCAP_S390_VXRS 2048 107 #define HWCAP_S390_VXRS_BCD 4096 108 #define HWCAP_S390_VXRS_EXT 8192 109 #define HWCAP_S390_GS 16384 110 111 /* Internal bits, not exposed via elf */ 112 #define HWCAP_INT_SIE 1UL 113 114 /* 115 * These are used to set parameters in the core dumps. 116 */ 117 #define ELF_CLASS ELFCLASS64 118 #define ELF_DATA ELFDATA2MSB 119 #define ELF_ARCH EM_S390 120 121 /* s390 specific phdr types */ 122 #define PT_S390_PGSTE 0x70000000 123 124 /* 125 * ELF register definitions.. 126 */ 127 128 #include <linux/compat.h> 129 130 #include <asm/ptrace.h> 131 #include <asm/syscall.h> 132 #include <asm/user.h> 133 134 typedef s390_fp_regs elf_fpregset_t; 135 typedef s390_regs elf_gregset_t; 136 137 typedef s390_fp_regs compat_elf_fpregset_t; 138 typedef s390_compat_regs compat_elf_gregset_t; 139 140 #include <linux/sched/mm.h> /* for task_struct */ 141 #include <asm/mmu_context.h> 142 143 #include <asm/vdso.h> 144 145 extern unsigned int vdso_enabled; 146 147 /* 148 * This is used to ensure we don't load something for the wrong architecture. 149 */ 150 #define elf_check_arch(x) \ 151 (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \ 152 && (x)->e_ident[EI_CLASS] == ELF_CLASS) 153 #define compat_elf_check_arch(x) \ 154 (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \ 155 && (x)->e_ident[EI_CLASS] == ELF_CLASS) 156 #define compat_start_thread start_thread31 157 158 struct arch_elf_state { 159 int rc; 160 }; 161 162 #define INIT_ARCH_ELF_STATE { .rc = 0 } 163 164 #define arch_check_elf(ehdr, interp, interp_ehdr, state) (0) 165 #ifdef CONFIG_PGSTE 166 #define arch_elf_pt_proc(ehdr, phdr, elf, interp, state) \ 167 ({ \ 168 struct arch_elf_state *_state = state; \ 169 if ((phdr)->p_type == PT_S390_PGSTE && \ 170 !page_table_allocate_pgste && \ 171 !test_thread_flag(TIF_PGSTE) && \ 172 !current->mm->context.alloc_pgste) { \ 173 set_thread_flag(TIF_PGSTE); \ 174 set_pt_regs_flag(task_pt_regs(current), \ 175 PIF_SYSCALL_RESTART); \ 176 _state->rc = -EAGAIN; \ 177 } \ 178 _state->rc; \ 179 }) 180 #else 181 #define arch_elf_pt_proc(ehdr, phdr, elf, interp, state) \ 182 ({ \ 183 (state)->rc; \ 184 }) 185 #endif 186 187 /* For SVR4/S390 the function pointer to be registered with `atexit` is 188 passed in R14. */ 189 #define ELF_PLAT_INIT(_r, load_addr) \ 190 do { \ 191 _r->gprs[14] = 0; \ 192 } while (0) 193 194 #define CORE_DUMP_USE_REGSET 195 #define ELF_EXEC_PAGESIZE PAGE_SIZE 196 197 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical 198 use of this is to invoke "./ld.so someprog" to test out a new version of 199 the loader. We need to make sure that it is out of the way of the program 200 that it will "exec", and that there is sufficient room for the brk. 64-bit 201 tasks are aligned to 4GB. */ 202 #define ELF_ET_DYN_BASE (is_compat_task() ? \ 203 (STACK_TOP / 3 * 2) : \ 204 (STACK_TOP / 3 * 2) & ~((1UL << 32) - 1)) 205 206 /* This yields a mask that user programs can use to figure out what 207 instruction set this CPU supports. */ 208 209 extern unsigned long elf_hwcap; 210 #define ELF_HWCAP (elf_hwcap) 211 212 /* Internal hardware capabilities, not exposed via elf */ 213 214 extern unsigned long int_hwcap; 215 216 /* This yields a string that ld.so will use to load implementation 217 specific libraries for optimization. This is more specific in 218 intent than poking at uname or /proc/cpuinfo. 219 220 For the moment, we have only optimizations for the Intel generations, 221 but that could change... */ 222 223 #define ELF_PLATFORM_SIZE 8 224 extern char elf_platform[]; 225 #define ELF_PLATFORM (elf_platform) 226 227 #ifndef CONFIG_COMPAT 228 #define SET_PERSONALITY(ex) \ 229 do { \ 230 set_personality(PER_LINUX | \ 231 (current->personality & (~PER_MASK))); \ 232 current->thread.sys_call_table = \ 233 (unsigned long) &sys_call_table; \ 234 } while (0) 235 #else /* CONFIG_COMPAT */ 236 #define SET_PERSONALITY(ex) \ 237 do { \ 238 if (personality(current->personality) != PER_LINUX32) \ 239 set_personality(PER_LINUX | \ 240 (current->personality & ~PER_MASK)); \ 241 if ((ex).e_ident[EI_CLASS] == ELFCLASS32) { \ 242 set_thread_flag(TIF_31BIT); \ 243 current->thread.sys_call_table = \ 244 (unsigned long) &sys_call_table_emu; \ 245 } else { \ 246 clear_thread_flag(TIF_31BIT); \ 247 current->thread.sys_call_table = \ 248 (unsigned long) &sys_call_table; \ 249 } \ 250 } while (0) 251 #endif /* CONFIG_COMPAT */ 252 253 /* 254 * Cache aliasing on the latest machines calls for a mapping granularity 255 * of 512KB for the anonymous mapping base. For 64-bit processes use a 256 * 512KB alignment and a randomization of up to 1GB. For 31-bit processes 257 * the virtual address space is limited, use no alignment and limit the 258 * randomization to 8MB. 259 * For the additional randomization of the program break use 32MB for 260 * 64-bit and 8MB for 31-bit. 261 */ 262 #define BRK_RND_MASK (is_compat_task() ? 0x7ffUL : 0x1fffUL) 263 #define MMAP_RND_MASK (is_compat_task() ? 0x7ffUL : 0x3ff80UL) 264 #define MMAP_ALIGN_MASK (is_compat_task() ? 0 : 0x7fUL) 265 #define STACK_RND_MASK MMAP_RND_MASK 266 267 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 268 #define ARCH_DLINFO \ 269 do { \ 270 if (vdso_enabled) \ 271 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 272 (unsigned long)current->mm->context.vdso_base); \ 273 } while (0) 274 275 struct linux_binprm; 276 277 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 278 int arch_setup_additional_pages(struct linux_binprm *, int); 279 280 #endif 281