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 <asm/ptrace.h> 129 #include <asm/compat.h> 130 #include <asm/syscall.h> 131 #include <asm/user.h> 132 133 typedef s390_fp_regs elf_fpregset_t; 134 typedef s390_regs elf_gregset_t; 135 136 typedef s390_fp_regs compat_elf_fpregset_t; 137 typedef s390_compat_regs compat_elf_gregset_t; 138 139 #include <linux/compat.h> 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 /* 198 * This is the base location for PIE (ET_DYN with INTERP) loads. On 199 * 64-bit, this is raised to 4GB to leave the entire 32-bit address 200 * space open for things that want to use the area for 32-bit pointers. 201 */ 202 #define ELF_ET_DYN_BASE (is_compat_task() ? 0x000400000UL : \ 203 0x100000000UL) 204 205 /* This yields a mask that user programs can use to figure out what 206 instruction set this CPU supports. */ 207 208 extern unsigned long elf_hwcap; 209 #define ELF_HWCAP (elf_hwcap) 210 211 /* Internal hardware capabilities, not exposed via elf */ 212 213 extern unsigned long int_hwcap; 214 215 /* This yields a string that ld.so will use to load implementation 216 specific libraries for optimization. This is more specific in 217 intent than poking at uname or /proc/cpuinfo. 218 219 For the moment, we have only optimizations for the Intel generations, 220 but that could change... */ 221 222 #define ELF_PLATFORM_SIZE 8 223 extern char elf_platform[]; 224 #define ELF_PLATFORM (elf_platform) 225 226 #ifndef CONFIG_COMPAT 227 #define SET_PERSONALITY(ex) \ 228 do { \ 229 set_personality(PER_LINUX | \ 230 (current->personality & (~PER_MASK))); \ 231 current->thread.sys_call_table = \ 232 (unsigned long) &sys_call_table; \ 233 } while (0) 234 #else /* CONFIG_COMPAT */ 235 #define SET_PERSONALITY(ex) \ 236 do { \ 237 if (personality(current->personality) != PER_LINUX32) \ 238 set_personality(PER_LINUX | \ 239 (current->personality & ~PER_MASK)); \ 240 if ((ex).e_ident[EI_CLASS] == ELFCLASS32) { \ 241 set_thread_flag(TIF_31BIT); \ 242 current->thread.sys_call_table = \ 243 (unsigned long) &sys_call_table_emu; \ 244 } else { \ 245 clear_thread_flag(TIF_31BIT); \ 246 current->thread.sys_call_table = \ 247 (unsigned long) &sys_call_table; \ 248 } \ 249 } while (0) 250 #endif /* CONFIG_COMPAT */ 251 252 /* 253 * Cache aliasing on the latest machines calls for a mapping granularity 254 * of 512KB. For 64-bit processes use a 512KB alignment and a randomization 255 * of up to 1GB. For 31-bit processes the virtual address space is limited, 256 * use no alignment and limit the randomization to 8MB. 257 */ 258 #define BRK_RND_MASK (is_compat_task() ? 0x7ffUL : 0x3ffffUL) 259 #define MMAP_RND_MASK (is_compat_task() ? 0x7ffUL : 0x3ff80UL) 260 #define MMAP_ALIGN_MASK (is_compat_task() ? 0 : 0x7fUL) 261 #define STACK_RND_MASK MMAP_RND_MASK 262 263 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 264 #define ARCH_DLINFO \ 265 do { \ 266 if (vdso_enabled) \ 267 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 268 (unsigned long)current->mm->context.vdso_base); \ 269 } while (0) 270 271 struct linux_binprm; 272 273 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 274 int arch_setup_additional_pages(struct linux_binprm *, int); 275 276 #endif 277