1c942fddfSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 2e2c0cdfbSPalmer Dabbelt /* 3e2c0cdfbSPalmer Dabbelt * 4e2c0cdfbSPalmer Dabbelt * Copyright (C) 2017 Zihao Yu 5e2c0cdfbSPalmer Dabbelt */ 6e2c0cdfbSPalmer Dabbelt 7e2c0cdfbSPalmer Dabbelt #include <linux/elf.h> 8e2c0cdfbSPalmer Dabbelt #include <linux/err.h> 9e2c0cdfbSPalmer Dabbelt #include <linux/errno.h> 10e2c0cdfbSPalmer Dabbelt #include <linux/moduleloader.h> 11e2c0cdfbSPalmer Dabbelt 1277aa85deSAndreas Schwab static int apply_r_riscv_32_rela(struct module *me, u32 *location, Elf_Addr v) 1377aa85deSAndreas Schwab { 1477aa85deSAndreas Schwab if (v != (u32)v) { 1577aa85deSAndreas Schwab pr_err("%s: value %016llx out of range for 32-bit field\n", 16ef3a6140SOlof Johansson me->name, (long long)v); 1777aa85deSAndreas Schwab return -EINVAL; 1877aa85deSAndreas Schwab } 1977aa85deSAndreas Schwab *location = v; 2077aa85deSAndreas Schwab return 0; 2177aa85deSAndreas Schwab } 2277aa85deSAndreas Schwab 23e2c0cdfbSPalmer Dabbelt static int apply_r_riscv_64_rela(struct module *me, u32 *location, Elf_Addr v) 24e2c0cdfbSPalmer Dabbelt { 25e2c0cdfbSPalmer Dabbelt *(u64 *)location = v; 26e2c0cdfbSPalmer Dabbelt return 0; 27e2c0cdfbSPalmer Dabbelt } 28e2c0cdfbSPalmer Dabbelt 29e2c0cdfbSPalmer Dabbelt static int apply_r_riscv_branch_rela(struct module *me, u32 *location, 30e2c0cdfbSPalmer Dabbelt Elf_Addr v) 31e2c0cdfbSPalmer Dabbelt { 327df85002SZong Li ptrdiff_t offset = (void *)v - (void *)location; 33e2c0cdfbSPalmer Dabbelt u32 imm12 = (offset & 0x1000) << (31 - 12); 34e2c0cdfbSPalmer Dabbelt u32 imm11 = (offset & 0x800) >> (11 - 7); 35e2c0cdfbSPalmer Dabbelt u32 imm10_5 = (offset & 0x7e0) << (30 - 10); 36e2c0cdfbSPalmer Dabbelt u32 imm4_1 = (offset & 0x1e) << (11 - 4); 37e2c0cdfbSPalmer Dabbelt 38e2c0cdfbSPalmer Dabbelt *location = (*location & 0x1fff07f) | imm12 | imm11 | imm10_5 | imm4_1; 39e2c0cdfbSPalmer Dabbelt return 0; 40e2c0cdfbSPalmer Dabbelt } 41e2c0cdfbSPalmer Dabbelt 42e2c0cdfbSPalmer Dabbelt static int apply_r_riscv_jal_rela(struct module *me, u32 *location, 43e2c0cdfbSPalmer Dabbelt Elf_Addr v) 44e2c0cdfbSPalmer Dabbelt { 457df85002SZong Li ptrdiff_t offset = (void *)v - (void *)location; 46e2c0cdfbSPalmer Dabbelt u32 imm20 = (offset & 0x100000) << (31 - 20); 47e2c0cdfbSPalmer Dabbelt u32 imm19_12 = (offset & 0xff000); 48e2c0cdfbSPalmer Dabbelt u32 imm11 = (offset & 0x800) << (20 - 11); 49e2c0cdfbSPalmer Dabbelt u32 imm10_1 = (offset & 0x7fe) << (30 - 10); 50e2c0cdfbSPalmer Dabbelt 51e2c0cdfbSPalmer Dabbelt *location = (*location & 0xfff) | imm20 | imm19_12 | imm11 | imm10_1; 52e2c0cdfbSPalmer Dabbelt return 0; 53e2c0cdfbSPalmer Dabbelt } 54e2c0cdfbSPalmer Dabbelt 5556ea45aeSZong Li static int apply_r_riscv_rcv_branch_rela(struct module *me, u32 *location, 5656ea45aeSZong Li Elf_Addr v) 5756ea45aeSZong Li { 587df85002SZong Li ptrdiff_t offset = (void *)v - (void *)location; 5956ea45aeSZong Li u16 imm8 = (offset & 0x100) << (12 - 8); 6056ea45aeSZong Li u16 imm7_6 = (offset & 0xc0) >> (6 - 5); 6156ea45aeSZong Li u16 imm5 = (offset & 0x20) >> (5 - 2); 6256ea45aeSZong Li u16 imm4_3 = (offset & 0x18) << (12 - 5); 6356ea45aeSZong Li u16 imm2_1 = (offset & 0x6) << (12 - 10); 6456ea45aeSZong Li 6556ea45aeSZong Li *(u16 *)location = (*(u16 *)location & 0xe383) | 6656ea45aeSZong Li imm8 | imm7_6 | imm5 | imm4_3 | imm2_1; 6756ea45aeSZong Li return 0; 6856ea45aeSZong Li } 6956ea45aeSZong Li 7056ea45aeSZong Li static int apply_r_riscv_rvc_jump_rela(struct module *me, u32 *location, 7156ea45aeSZong Li Elf_Addr v) 7256ea45aeSZong Li { 737df85002SZong Li ptrdiff_t offset = (void *)v - (void *)location; 7456ea45aeSZong Li u16 imm11 = (offset & 0x800) << (12 - 11); 7556ea45aeSZong Li u16 imm10 = (offset & 0x400) >> (10 - 8); 7656ea45aeSZong Li u16 imm9_8 = (offset & 0x300) << (12 - 11); 7756ea45aeSZong Li u16 imm7 = (offset & 0x80) >> (7 - 6); 7856ea45aeSZong Li u16 imm6 = (offset & 0x40) << (12 - 11); 7956ea45aeSZong Li u16 imm5 = (offset & 0x20) >> (5 - 2); 8056ea45aeSZong Li u16 imm4 = (offset & 0x10) << (12 - 5); 8156ea45aeSZong Li u16 imm3_1 = (offset & 0xe) << (12 - 10); 8256ea45aeSZong Li 8356ea45aeSZong Li *(u16 *)location = (*(u16 *)location & 0xe003) | 8456ea45aeSZong Li imm11 | imm10 | imm9_8 | imm7 | imm6 | imm5 | imm4 | imm3_1; 8556ea45aeSZong Li return 0; 8656ea45aeSZong Li } 8756ea45aeSZong Li 88e2c0cdfbSPalmer Dabbelt static int apply_r_riscv_pcrel_hi20_rela(struct module *me, u32 *location, 89e2c0cdfbSPalmer Dabbelt Elf_Addr v) 90e2c0cdfbSPalmer Dabbelt { 917df85002SZong Li ptrdiff_t offset = (void *)v - (void *)location; 92e2c0cdfbSPalmer Dabbelt s32 hi20; 93e2c0cdfbSPalmer Dabbelt 94e2c0cdfbSPalmer Dabbelt if (offset != (s32)offset) { 95e2c0cdfbSPalmer Dabbelt pr_err( 96e2c0cdfbSPalmer Dabbelt "%s: target %016llx can not be addressed by the 32-bit offset from PC = %p\n", 97ef3a6140SOlof Johansson me->name, (long long)v, location); 98e2c0cdfbSPalmer Dabbelt return -EINVAL; 99e2c0cdfbSPalmer Dabbelt } 100e2c0cdfbSPalmer Dabbelt 101e2c0cdfbSPalmer Dabbelt hi20 = (offset + 0x800) & 0xfffff000; 102e2c0cdfbSPalmer Dabbelt *location = (*location & 0xfff) | hi20; 103e2c0cdfbSPalmer Dabbelt return 0; 104e2c0cdfbSPalmer Dabbelt } 105e2c0cdfbSPalmer Dabbelt 106e2c0cdfbSPalmer Dabbelt static int apply_r_riscv_pcrel_lo12_i_rela(struct module *me, u32 *location, 107e2c0cdfbSPalmer Dabbelt Elf_Addr v) 108e2c0cdfbSPalmer Dabbelt { 109e2c0cdfbSPalmer Dabbelt /* 110e2c0cdfbSPalmer Dabbelt * v is the lo12 value to fill. It is calculated before calling this 111e2c0cdfbSPalmer Dabbelt * handler. 112e2c0cdfbSPalmer Dabbelt */ 113e2c0cdfbSPalmer Dabbelt *location = (*location & 0xfffff) | ((v & 0xfff) << 20); 114e2c0cdfbSPalmer Dabbelt return 0; 115e2c0cdfbSPalmer Dabbelt } 116e2c0cdfbSPalmer Dabbelt 117e2c0cdfbSPalmer Dabbelt static int apply_r_riscv_pcrel_lo12_s_rela(struct module *me, u32 *location, 118e2c0cdfbSPalmer Dabbelt Elf_Addr v) 119e2c0cdfbSPalmer Dabbelt { 120e2c0cdfbSPalmer Dabbelt /* 121e2c0cdfbSPalmer Dabbelt * v is the lo12 value to fill. It is calculated before calling this 122e2c0cdfbSPalmer Dabbelt * handler. 123e2c0cdfbSPalmer Dabbelt */ 124e2c0cdfbSPalmer Dabbelt u32 imm11_5 = (v & 0xfe0) << (31 - 11); 125e2c0cdfbSPalmer Dabbelt u32 imm4_0 = (v & 0x1f) << (11 - 4); 126e2c0cdfbSPalmer Dabbelt 127e2c0cdfbSPalmer Dabbelt *location = (*location & 0x1fff07f) | imm11_5 | imm4_0; 128e2c0cdfbSPalmer Dabbelt return 0; 129e2c0cdfbSPalmer Dabbelt } 130e2c0cdfbSPalmer Dabbelt 131e7456e69SZong Li static int apply_r_riscv_hi20_rela(struct module *me, u32 *location, 132e7456e69SZong Li Elf_Addr v) 133e7456e69SZong Li { 134e7456e69SZong Li s32 hi20; 135e7456e69SZong Li 136da4ed378SJoe Perches if (IS_ENABLED(CONFIG_CMODEL_MEDLOW)) { 137e7456e69SZong Li pr_err( 138e7456e69SZong Li "%s: target %016llx can not be addressed by the 32-bit offset from PC = %p\n", 139ef3a6140SOlof Johansson me->name, (long long)v, location); 140e7456e69SZong Li return -EINVAL; 141e7456e69SZong Li } 142e7456e69SZong Li 143e7456e69SZong Li hi20 = ((s32)v + 0x800) & 0xfffff000; 144e7456e69SZong Li *location = (*location & 0xfff) | hi20; 145e7456e69SZong Li return 0; 146e7456e69SZong Li } 147e7456e69SZong Li 148e7456e69SZong Li static int apply_r_riscv_lo12_i_rela(struct module *me, u32 *location, 149e7456e69SZong Li Elf_Addr v) 150e7456e69SZong Li { 151e7456e69SZong Li /* Skip medlow checking because of filtering by HI20 already */ 152e7456e69SZong Li s32 hi20 = ((s32)v + 0x800) & 0xfffff000; 153e7456e69SZong Li s32 lo12 = ((s32)v - hi20); 154e7456e69SZong Li *location = (*location & 0xfffff) | ((lo12 & 0xfff) << 20); 155e7456e69SZong Li return 0; 156e7456e69SZong Li } 157e7456e69SZong Li 158e7456e69SZong Li static int apply_r_riscv_lo12_s_rela(struct module *me, u32 *location, 159e7456e69SZong Li Elf_Addr v) 160e7456e69SZong Li { 161e7456e69SZong Li /* Skip medlow checking because of filtering by HI20 already */ 162e7456e69SZong Li s32 hi20 = ((s32)v + 0x800) & 0xfffff000; 163e7456e69SZong Li s32 lo12 = ((s32)v - hi20); 164e7456e69SZong Li u32 imm11_5 = (lo12 & 0xfe0) << (31 - 11); 165e7456e69SZong Li u32 imm4_0 = (lo12 & 0x1f) << (11 - 4); 166e7456e69SZong Li *location = (*location & 0x1fff07f) | imm11_5 | imm4_0; 167e7456e69SZong Li return 0; 168e7456e69SZong Li } 169e7456e69SZong Li 170da975dd4SZong Li static int apply_r_riscv_got_hi20_rela(struct module *me, u32 *location, 171da975dd4SZong Li Elf_Addr v) 172da975dd4SZong Li { 1737df85002SZong Li ptrdiff_t offset = (void *)v - (void *)location; 174da975dd4SZong Li s32 hi20; 175da975dd4SZong Li 176da975dd4SZong Li /* Always emit the got entry */ 177da975dd4SZong Li if (IS_ENABLED(CONFIG_MODULE_SECTIONS)) { 178da975dd4SZong Li offset = module_emit_got_entry(me, v); 179da975dd4SZong Li offset = (void *)offset - (void *)location; 180da975dd4SZong Li } else { 181da975dd4SZong Li pr_err( 182da975dd4SZong Li "%s: can not generate the GOT entry for symbol = %016llx from PC = %p\n", 183ef3a6140SOlof Johansson me->name, (long long)v, location); 184da975dd4SZong Li return -EINVAL; 185da975dd4SZong Li } 186da975dd4SZong Li 187da975dd4SZong Li hi20 = (offset + 0x800) & 0xfffff000; 188da975dd4SZong Li *location = (*location & 0xfff) | hi20; 189da975dd4SZong Li return 0; 190da975dd4SZong Li } 191da975dd4SZong Li 192e2c0cdfbSPalmer Dabbelt static int apply_r_riscv_call_plt_rela(struct module *me, u32 *location, 193e2c0cdfbSPalmer Dabbelt Elf_Addr v) 194e2c0cdfbSPalmer Dabbelt { 1957df85002SZong Li ptrdiff_t offset = (void *)v - (void *)location; 196e2c0cdfbSPalmer Dabbelt s32 fill_v = offset; 197e2c0cdfbSPalmer Dabbelt u32 hi20, lo12; 198e2c0cdfbSPalmer Dabbelt 199e2c0cdfbSPalmer Dabbelt if (offset != fill_v) { 200da975dd4SZong Li /* Only emit the plt entry if offset over 32-bit range */ 201da975dd4SZong Li if (IS_ENABLED(CONFIG_MODULE_SECTIONS)) { 202da975dd4SZong Li offset = module_emit_plt_entry(me, v); 203da975dd4SZong Li offset = (void *)offset - (void *)location; 204da975dd4SZong Li } else { 205e2c0cdfbSPalmer Dabbelt pr_err( 206e2c0cdfbSPalmer Dabbelt "%s: target %016llx can not be addressed by the 32-bit offset from PC = %p\n", 207ef3a6140SOlof Johansson me->name, (long long)v, location); 208e2c0cdfbSPalmer Dabbelt return -EINVAL; 209e2c0cdfbSPalmer Dabbelt } 210da975dd4SZong Li } 211e2c0cdfbSPalmer Dabbelt 212e2c0cdfbSPalmer Dabbelt hi20 = (offset + 0x800) & 0xfffff000; 213e2c0cdfbSPalmer Dabbelt lo12 = (offset - hi20) & 0xfff; 214e2c0cdfbSPalmer Dabbelt *location = (*location & 0xfff) | hi20; 215e2c0cdfbSPalmer Dabbelt *(location + 1) = (*(location + 1) & 0xfffff) | (lo12 << 20); 216e2c0cdfbSPalmer Dabbelt return 0; 217e2c0cdfbSPalmer Dabbelt } 218e2c0cdfbSPalmer Dabbelt 219e1910c72SZong Li static int apply_r_riscv_call_rela(struct module *me, u32 *location, 220e1910c72SZong Li Elf_Addr v) 221e1910c72SZong Li { 2227df85002SZong Li ptrdiff_t offset = (void *)v - (void *)location; 223e1910c72SZong Li s32 fill_v = offset; 224e1910c72SZong Li u32 hi20, lo12; 225e1910c72SZong Li 226e1910c72SZong Li if (offset != fill_v) { 227e1910c72SZong Li pr_err( 228e1910c72SZong Li "%s: target %016llx can not be addressed by the 32-bit offset from PC = %p\n", 229ef3a6140SOlof Johansson me->name, (long long)v, location); 230e1910c72SZong Li return -EINVAL; 231e1910c72SZong Li } 232e1910c72SZong Li 233e1910c72SZong Li hi20 = (offset + 0x800) & 0xfffff000; 234e1910c72SZong Li lo12 = (offset - hi20) & 0xfff; 235e1910c72SZong Li *location = (*location & 0xfff) | hi20; 236e1910c72SZong Li *(location + 1) = (*(location + 1) & 0xfffff) | (lo12 << 20); 237e1910c72SZong Li return 0; 238e1910c72SZong Li } 239e1910c72SZong Li 240e2c0cdfbSPalmer Dabbelt static int apply_r_riscv_relax_rela(struct module *me, u32 *location, 241e2c0cdfbSPalmer Dabbelt Elf_Addr v) 242e2c0cdfbSPalmer Dabbelt { 243e2c0cdfbSPalmer Dabbelt return 0; 244e2c0cdfbSPalmer Dabbelt } 245e2c0cdfbSPalmer Dabbelt 24629e405cdSZong Li static int apply_r_riscv_align_rela(struct module *me, u32 *location, 24729e405cdSZong Li Elf_Addr v) 24829e405cdSZong Li { 24929e405cdSZong Li pr_err( 25029e405cdSZong Li "%s: The unexpected relocation type 'R_RISCV_ALIGN' from PC = %p\n", 25129e405cdSZong Li me->name, location); 25229e405cdSZong Li return -EINVAL; 25329e405cdSZong Li } 25429e405cdSZong Li 2558e691b16SZong Li static int apply_r_riscv_add32_rela(struct module *me, u32 *location, 2568e691b16SZong Li Elf_Addr v) 2578e691b16SZong Li { 258781c8fe2SAndreas Schwab *(u32 *)location += (u32)v; 2598e691b16SZong Li return 0; 2608e691b16SZong Li } 2618e691b16SZong Li 2624aad074cSZong Li static int apply_r_riscv_sub32_rela(struct module *me, u32 *location, 2634aad074cSZong Li Elf_Addr v) 2644aad074cSZong Li { 265781c8fe2SAndreas Schwab *(u32 *)location -= (u32)v; 2664aad074cSZong Li return 0; 2674aad074cSZong Li } 2684aad074cSZong Li 269e2c0cdfbSPalmer Dabbelt static int (*reloc_handlers_rela[]) (struct module *me, u32 *location, 270e2c0cdfbSPalmer Dabbelt Elf_Addr v) = { 27177aa85deSAndreas Schwab [R_RISCV_32] = apply_r_riscv_32_rela, 272e2c0cdfbSPalmer Dabbelt [R_RISCV_64] = apply_r_riscv_64_rela, 273e2c0cdfbSPalmer Dabbelt [R_RISCV_BRANCH] = apply_r_riscv_branch_rela, 274e2c0cdfbSPalmer Dabbelt [R_RISCV_JAL] = apply_r_riscv_jal_rela, 27556ea45aeSZong Li [R_RISCV_RVC_BRANCH] = apply_r_riscv_rcv_branch_rela, 27656ea45aeSZong Li [R_RISCV_RVC_JUMP] = apply_r_riscv_rvc_jump_rela, 277e2c0cdfbSPalmer Dabbelt [R_RISCV_PCREL_HI20] = apply_r_riscv_pcrel_hi20_rela, 278e2c0cdfbSPalmer Dabbelt [R_RISCV_PCREL_LO12_I] = apply_r_riscv_pcrel_lo12_i_rela, 279e2c0cdfbSPalmer Dabbelt [R_RISCV_PCREL_LO12_S] = apply_r_riscv_pcrel_lo12_s_rela, 280e7456e69SZong Li [R_RISCV_HI20] = apply_r_riscv_hi20_rela, 281e7456e69SZong Li [R_RISCV_LO12_I] = apply_r_riscv_lo12_i_rela, 282e7456e69SZong Li [R_RISCV_LO12_S] = apply_r_riscv_lo12_s_rela, 283da975dd4SZong Li [R_RISCV_GOT_HI20] = apply_r_riscv_got_hi20_rela, 284e2c0cdfbSPalmer Dabbelt [R_RISCV_CALL_PLT] = apply_r_riscv_call_plt_rela, 285e1910c72SZong Li [R_RISCV_CALL] = apply_r_riscv_call_rela, 286e2c0cdfbSPalmer Dabbelt [R_RISCV_RELAX] = apply_r_riscv_relax_rela, 28729e405cdSZong Li [R_RISCV_ALIGN] = apply_r_riscv_align_rela, 2888e691b16SZong Li [R_RISCV_ADD32] = apply_r_riscv_add32_rela, 2894aad074cSZong Li [R_RISCV_SUB32] = apply_r_riscv_sub32_rela, 290e2c0cdfbSPalmer Dabbelt }; 291e2c0cdfbSPalmer Dabbelt 292e2c0cdfbSPalmer Dabbelt int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, 293e2c0cdfbSPalmer Dabbelt unsigned int symindex, unsigned int relsec, 294e2c0cdfbSPalmer Dabbelt struct module *me) 295e2c0cdfbSPalmer Dabbelt { 296e2c0cdfbSPalmer Dabbelt Elf_Rela *rel = (void *) sechdrs[relsec].sh_addr; 297e2c0cdfbSPalmer Dabbelt int (*handler)(struct module *me, u32 *location, Elf_Addr v); 298e2c0cdfbSPalmer Dabbelt Elf_Sym *sym; 299e2c0cdfbSPalmer Dabbelt u32 *location; 300e2c0cdfbSPalmer Dabbelt unsigned int i, type; 301e2c0cdfbSPalmer Dabbelt Elf_Addr v; 302e2c0cdfbSPalmer Dabbelt int res; 303e2c0cdfbSPalmer Dabbelt 304e2c0cdfbSPalmer Dabbelt pr_debug("Applying relocate section %u to %u\n", relsec, 305e2c0cdfbSPalmer Dabbelt sechdrs[relsec].sh_info); 306e2c0cdfbSPalmer Dabbelt 307e2c0cdfbSPalmer Dabbelt for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { 308e2c0cdfbSPalmer Dabbelt /* This is where to make the change */ 309e2c0cdfbSPalmer Dabbelt location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr 310e2c0cdfbSPalmer Dabbelt + rel[i].r_offset; 311e2c0cdfbSPalmer Dabbelt /* This is the symbol it is referring to */ 312e2c0cdfbSPalmer Dabbelt sym = (Elf_Sym *)sechdrs[symindex].sh_addr 313e2c0cdfbSPalmer Dabbelt + ELF_RISCV_R_SYM(rel[i].r_info); 314e2c0cdfbSPalmer Dabbelt if (IS_ERR_VALUE(sym->st_value)) { 315e2c0cdfbSPalmer Dabbelt /* Ignore unresolved weak symbol */ 316e2c0cdfbSPalmer Dabbelt if (ELF_ST_BIND(sym->st_info) == STB_WEAK) 317e2c0cdfbSPalmer Dabbelt continue; 318e2c0cdfbSPalmer Dabbelt pr_warning("%s: Unknown symbol %s\n", 319e2c0cdfbSPalmer Dabbelt me->name, strtab + sym->st_name); 320e2c0cdfbSPalmer Dabbelt return -ENOENT; 321e2c0cdfbSPalmer Dabbelt } 322e2c0cdfbSPalmer Dabbelt 323e2c0cdfbSPalmer Dabbelt type = ELF_RISCV_R_TYPE(rel[i].r_info); 324e2c0cdfbSPalmer Dabbelt 325e2c0cdfbSPalmer Dabbelt if (type < ARRAY_SIZE(reloc_handlers_rela)) 326e2c0cdfbSPalmer Dabbelt handler = reloc_handlers_rela[type]; 327e2c0cdfbSPalmer Dabbelt else 328e2c0cdfbSPalmer Dabbelt handler = NULL; 329e2c0cdfbSPalmer Dabbelt 330e2c0cdfbSPalmer Dabbelt if (!handler) { 331e2c0cdfbSPalmer Dabbelt pr_err("%s: Unknown relocation type %u\n", 332e2c0cdfbSPalmer Dabbelt me->name, type); 333e2c0cdfbSPalmer Dabbelt return -EINVAL; 334e2c0cdfbSPalmer Dabbelt } 335e2c0cdfbSPalmer Dabbelt 336e2c0cdfbSPalmer Dabbelt v = sym->st_value + rel[i].r_addend; 337e2c0cdfbSPalmer Dabbelt 338e2c0cdfbSPalmer Dabbelt if (type == R_RISCV_PCREL_LO12_I || type == R_RISCV_PCREL_LO12_S) { 339e2c0cdfbSPalmer Dabbelt unsigned int j; 340e2c0cdfbSPalmer Dabbelt 341e2c0cdfbSPalmer Dabbelt for (j = 0; j < sechdrs[relsec].sh_size / sizeof(*rel); j++) { 3427df85002SZong Li unsigned long hi20_loc = 343e2c0cdfbSPalmer Dabbelt sechdrs[sechdrs[relsec].sh_info].sh_addr 344e2c0cdfbSPalmer Dabbelt + rel[j].r_offset; 345da975dd4SZong Li u32 hi20_type = ELF_RISCV_R_TYPE(rel[j].r_info); 346da975dd4SZong Li 347da975dd4SZong Li /* Find the corresponding HI20 relocation entry */ 348da975dd4SZong Li if (hi20_loc == sym->st_value 349da975dd4SZong Li && (hi20_type == R_RISCV_PCREL_HI20 350da975dd4SZong Li || hi20_type == R_RISCV_GOT_HI20)) { 351da975dd4SZong Li s32 hi20, lo12; 352e2c0cdfbSPalmer Dabbelt Elf_Sym *hi20_sym = 353e2c0cdfbSPalmer Dabbelt (Elf_Sym *)sechdrs[symindex].sh_addr 354e2c0cdfbSPalmer Dabbelt + ELF_RISCV_R_SYM(rel[j].r_info); 3557df85002SZong Li unsigned long hi20_sym_val = 356e2c0cdfbSPalmer Dabbelt hi20_sym->st_value 357e2c0cdfbSPalmer Dabbelt + rel[j].r_addend; 358da975dd4SZong Li 359e2c0cdfbSPalmer Dabbelt /* Calculate lo12 */ 3607df85002SZong Li size_t offset = hi20_sym_val - hi20_loc; 361da975dd4SZong Li if (IS_ENABLED(CONFIG_MODULE_SECTIONS) 362da975dd4SZong Li && hi20_type == R_RISCV_GOT_HI20) { 363da975dd4SZong Li offset = module_emit_got_entry( 364da975dd4SZong Li me, hi20_sym_val); 365da975dd4SZong Li offset = offset - hi20_loc; 366da975dd4SZong Li } 367da975dd4SZong Li hi20 = (offset + 0x800) & 0xfffff000; 368da975dd4SZong Li lo12 = offset - hi20; 369e2c0cdfbSPalmer Dabbelt v = lo12; 370da975dd4SZong Li 371e2c0cdfbSPalmer Dabbelt break; 372e2c0cdfbSPalmer Dabbelt } 373e2c0cdfbSPalmer Dabbelt } 374e2c0cdfbSPalmer Dabbelt if (j == sechdrs[relsec].sh_size / sizeof(*rel)) { 375e2c0cdfbSPalmer Dabbelt pr_err( 376da975dd4SZong Li "%s: Can not find HI20 relocation information\n", 377e2c0cdfbSPalmer Dabbelt me->name); 378e2c0cdfbSPalmer Dabbelt return -EINVAL; 379e2c0cdfbSPalmer Dabbelt } 380e2c0cdfbSPalmer Dabbelt } 381e2c0cdfbSPalmer Dabbelt 382e2c0cdfbSPalmer Dabbelt res = handler(me, location, v); 383e2c0cdfbSPalmer Dabbelt if (res) 384e2c0cdfbSPalmer Dabbelt return res; 385e2c0cdfbSPalmer Dabbelt } 386e2c0cdfbSPalmer Dabbelt 387e2c0cdfbSPalmer Dabbelt return 0; 388e2c0cdfbSPalmer Dabbelt } 389