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 94enum { 95 HWCAP_NR_ESAN3 = 0, 96 HWCAP_NR_ZARCH = 1, 97 HWCAP_NR_STFLE = 2, 98 HWCAP_NR_MSA = 3, 99 HWCAP_NR_LDISP = 4, 100 HWCAP_NR_EIMM = 5, 101 HWCAP_NR_DFP = 6, 102 HWCAP_NR_HPAGE = 7, 103 HWCAP_NR_ETF3EH = 8, 104 HWCAP_NR_HIGH_GPRS = 9, 105 HWCAP_NR_TE = 10, 106 HWCAP_NR_VXRS = 11, 107 HWCAP_NR_VXRS_BCD = 12, 108 HWCAP_NR_VXRS_EXT = 13, 109 HWCAP_NR_GS = 14, 110 HWCAP_NR_VXRS_EXT2 = 15, 111 HWCAP_NR_VXRS_PDE = 16, 112 HWCAP_NR_SORT = 17, 113 HWCAP_NR_DFLT = 18, 114 HWCAP_NR_VXRS_PDE2 = 19, 115 HWCAP_NR_NNPA = 20, 116 HWCAP_NR_PCI_MIO = 21, 117 HWCAP_NR_SIE = 22, 118 HWCAP_NR_MAX 119}; 120 121/* Bits present in AT_HWCAP. */ 122#define HWCAP_ESAN3 BIT(HWCAP_NR_ESAN3) 123#define HWCAP_ZARCH BIT(HWCAP_NR_ZARCH) 124#define HWCAP_STFLE BIT(HWCAP_NR_STFLE) 125#define HWCAP_MSA BIT(HWCAP_NR_MSA) 126#define HWCAP_LDISP BIT(HWCAP_NR_LDISP) 127#define HWCAP_EIMM BIT(HWCAP_NR_EIMM) 128#define HWCAP_DFP BIT(HWCAP_NR_DFP) 129#define HWCAP_HPAGE BIT(HWCAP_NR_HPAGE) 130#define HWCAP_ETF3EH BIT(HWCAP_NR_ETF3EH) 131#define HWCAP_HIGH_GPRS BIT(HWCAP_NR_HIGH_GPRS) 132#define HWCAP_TE BIT(HWCAP_NR_TE) 133#define HWCAP_VXRS BIT(HWCAP_NR_VXRS) 134#define HWCAP_VXRS_BCD BIT(HWCAP_NR_VXRS_BCD) 135#define HWCAP_VXRS_EXT BIT(HWCAP_NR_VXRS_EXT) 136#define HWCAP_GS BIT(HWCAP_NR_GS) 137#define HWCAP_VXRS_EXT2 BIT(HWCAP_NR_VXRS_EXT2) 138#define HWCAP_VXRS_PDE BIT(HWCAP_NR_VXRS_PDE) 139#define HWCAP_SORT BIT(HWCAP_NR_SORT) 140#define HWCAP_DFLT BIT(HWCAP_NR_DFLT) 141#define HWCAP_VXRS_PDE2 BIT(HWCAP_NR_VXRS_PDE2) 142#define HWCAP_NNPA BIT(HWCAP_NR_NNPA) 143#define HWCAP_PCI_MIO BIT(HWCAP_NR_PCI_MIO) 144#define HWCAP_SIE BIT(HWCAP_NR_SIE) 145 146/* 147 * These are used to set parameters in the core dumps. 148 */ 149#define ELF_CLASS ELFCLASS64 150#define ELF_DATA ELFDATA2MSB 151#define ELF_ARCH EM_S390 152 153/* s390 specific phdr types */ 154#define PT_S390_PGSTE 0x70000000 155 156/* 157 * ELF register definitions.. 158 */ 159 160#include <linux/compat.h> 161 162#include <asm/ptrace.h> 163#include <asm/syscall.h> 164#include <asm/user.h> 165 166typedef s390_fp_regs elf_fpregset_t; 167typedef s390_regs elf_gregset_t; 168 169typedef s390_fp_regs compat_elf_fpregset_t; 170typedef s390_compat_regs compat_elf_gregset_t; 171 172#include <linux/sched/mm.h> /* for task_struct */ 173#include <asm/mmu_context.h> 174 175/* 176 * This is used to ensure we don't load something for the wrong architecture. 177 */ 178#define elf_check_arch(x) \ 179 (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \ 180 && (x)->e_ident[EI_CLASS] == ELF_CLASS) 181#define compat_elf_check_arch(x) \ 182 (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \ 183 && (x)->e_ident[EI_CLASS] == ELF_CLASS) 184#define compat_start_thread start_thread31 185 186struct arch_elf_state { 187 int rc; 188}; 189 190#define INIT_ARCH_ELF_STATE { .rc = 0 } 191 192#define arch_check_elf(ehdr, interp, interp_ehdr, state) (0) 193#ifdef CONFIG_PGSTE 194#define arch_elf_pt_proc(ehdr, phdr, elf, interp, state) \ 195({ \ 196 struct arch_elf_state *_state = state; \ 197 if ((phdr)->p_type == PT_S390_PGSTE && \ 198 !page_table_allocate_pgste && \ 199 !test_thread_flag(TIF_PGSTE) && \ 200 !current->mm->context.alloc_pgste) { \ 201 set_thread_flag(TIF_PGSTE); \ 202 set_pt_regs_flag(task_pt_regs(current), \ 203 PIF_EXECVE_PGSTE_RESTART); \ 204 _state->rc = -EAGAIN; \ 205 } \ 206 _state->rc; \ 207}) 208#else 209#define arch_elf_pt_proc(ehdr, phdr, elf, interp, state) \ 210({ \ 211 (state)->rc; \ 212}) 213#endif 214 215/* For SVR4/S390 the function pointer to be registered with `atexit` is 216 passed in R14. */ 217#define ELF_PLAT_INIT(_r, load_addr) \ 218 do { \ 219 _r->gprs[14] = 0; \ 220 } while (0) 221 222#define CORE_DUMP_USE_REGSET 223#define ELF_EXEC_PAGESIZE PAGE_SIZE 224 225/* This is the location that an ET_DYN program is loaded if exec'ed. Typical 226 use of this is to invoke "./ld.so someprog" to test out a new version of 227 the loader. We need to make sure that it is out of the way of the program 228 that it will "exec", and that there is sufficient room for the brk. 64-bit 229 tasks are aligned to 4GB. */ 230#define ELF_ET_DYN_BASE (is_compat_task() ? \ 231 (STACK_TOP / 3 * 2) : \ 232 (STACK_TOP / 3 * 2) & ~((1UL << 32) - 1)) 233 234/* This yields a mask that user programs can use to figure out what 235 instruction set this CPU supports. */ 236 237extern unsigned long elf_hwcap; 238#define ELF_HWCAP (elf_hwcap) 239 240/* This yields a string that ld.so will use to load implementation 241 specific libraries for optimization. This is more specific in 242 intent than poking at uname or /proc/cpuinfo. 243 244 For the moment, we have only optimizations for the Intel generations, 245 but that could change... */ 246 247#define ELF_PLATFORM_SIZE 8 248extern char elf_platform[]; 249#define ELF_PLATFORM (elf_platform) 250 251#ifndef CONFIG_COMPAT 252#define SET_PERSONALITY(ex) \ 253do { \ 254 set_personality(PER_LINUX | \ 255 (current->personality & (~PER_MASK))); \ 256 current->thread.sys_call_table = sys_call_table; \ 257} while (0) 258#else /* CONFIG_COMPAT */ 259#define SET_PERSONALITY(ex) \ 260do { \ 261 if (personality(current->personality) != PER_LINUX32) \ 262 set_personality(PER_LINUX | \ 263 (current->personality & ~PER_MASK)); \ 264 if ((ex).e_ident[EI_CLASS] == ELFCLASS32) { \ 265 set_thread_flag(TIF_31BIT); \ 266 current->thread.sys_call_table = \ 267 sys_call_table_emu; \ 268 } else { \ 269 clear_thread_flag(TIF_31BIT); \ 270 current->thread.sys_call_table = \ 271 sys_call_table; \ 272 } \ 273} while (0) 274#endif /* CONFIG_COMPAT */ 275 276/* 277 * Cache aliasing on the latest machines calls for a mapping granularity 278 * of 512KB for the anonymous mapping base. For 64-bit processes use a 279 * 512KB alignment and a randomization of up to 1GB. For 31-bit processes 280 * the virtual address space is limited, use no alignment and limit the 281 * randomization to 8MB. 282 * For the additional randomization of the program break use 32MB for 283 * 64-bit and 8MB for 31-bit. 284 */ 285#define BRK_RND_MASK (is_compat_task() ? 0x7ffUL : 0x1fffUL) 286#define MMAP_RND_MASK (is_compat_task() ? 0x7ffUL : 0x3ff80UL) 287#define MMAP_ALIGN_MASK (is_compat_task() ? 0 : 0x7fUL) 288#define STACK_RND_MASK MMAP_RND_MASK 289 290/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 291#define ARCH_DLINFO \ 292do { \ 293 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 294 (unsigned long)current->mm->context.vdso_base); \ 295} while (0) 296 297struct linux_binprm; 298 299#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 300int arch_setup_additional_pages(struct linux_binprm *, int); 301 302#endif 303