mirror of
https://github.com/ByteWelder/Tactility.git
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113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
/*
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* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <assert.h>
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#include <sys/errno.h>
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#include "esp_elf.h"
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#include "esp_log.h"
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#include "private/elf_platform.h"
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/** @brief RISC-V relocations defined by the ABIs */
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#define R_RISCV_NONE 0
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#define R_RISCV_32 1
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#define R_RISCV_64 2
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#define R_RISCV_RELATIVE 3
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#define R_RISCV_COPY 4
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#define R_RISCV_JUMP_SLOT 5
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#define R_RISCV_TLS_DTPMOD32 6
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#define R_RISCV_TLS_DTPMOD64 7
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#define R_RISCV_TLS_DTPREL32 8
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#define R_RISCV_TLS_DTPREL64 9
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#define R_RISCV_TLS_TPREL32 10
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#define R_RISCV_TLS_TPREL64 11
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#define R_RISCV_TLS_DESC 12
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#define R_RISCV_BRANCH 16
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#define R_RISCV_JAL 17
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#define R_RISCV_CALL 18
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#define R_RISCV_CALL_PLT 19
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#define R_RISCV_GOT_HI20 20
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#define R_RISCV_TLS_GOT_HI20 21
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#define R_RISCV_TLS_GD_HI20 22
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#define R_RISCV_PCREL_HI20 23
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#define R_RISCV_PCREL_LO12_I 24
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#define R_RISCV_PCREL_LO12_S 25
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#define R_RISCV_HI20 26
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#define R_RISCV_LO12_I 27
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#define R_RISCV_LO12_S 28
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#define R_RISCV_TPREL_HI20 29
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#define R_RISCV_TPREL_LO12_I 30
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#define R_RISCV_TPREL_LO12_S 31
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#define R_RISCV_TPREL_ADD 32
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#define R_RISCV_ADD8 33
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#define R_RISCV_ADD16 34
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#define R_RISCV_ADD32 35
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#define R_RISCV_ADD64 36
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#define R_RISCV_SUB8 37
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#define R_RISCV_SUB16 38
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#define R_RISCV_SUB32 39
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#define R_RISCV_SUB64 40
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#define R_RISCV_GNU_VTINHERIT 41
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#define R_RISCV_GNU_VTENTRY 42
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#define R_RISCV_ALIGN 43
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#define R_RISCV_RVC_BRANCH 44
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#define R_RISCV_RVC_JUMP 45
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#define R_RISCV_RVC_LUI 46
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#define R_RISCV_RELAX 51
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#define R_RISCV_SUB6 52
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#define R_RISCV_SET6 53
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#define R_RISCV_SET8 54
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#define R_RISCV_SET16 55
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#define R_RISCV_SET32 56
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#define R_RISCV_32_PCREL 57
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#define R_RISCV_IRELATIVE 58
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#define R_RISCV_PLT32 59
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static const char *TAG = "elf_arch";
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/**
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* @brief Relocates target architecture symbol of ELF
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*
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* @param elf - ELF object pointer
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* @param rela - Relocated symbol data
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* @param sym - ELF symbol table
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* @param addr - Jumping target address
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*
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* @return ESP_OK if success or other if failed.
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*/
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int esp_elf_arch_relocate(esp_elf_t *elf, const elf32_rela_t *rela,
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const elf32_sym_t *sym, uint32_t addr)
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{
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uint32_t *where;
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assert(elf && rela);
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where = (uint32_t *)((uint8_t *)elf->psegment + rela->offset + elf->svaddr);
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ESP_LOGD(TAG, "type: %d, where=%p addr=0x%x offset=0x%x",
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ELF_R_TYPE(rela->info), where, (int)elf->psegment, (int)rela->offset);
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/* Do relocation based on relocation type */
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switch (ELF_R_TYPE(rela->info)) {
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case R_RISCV_NONE:
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break;
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case R_RISCV_32:
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*where = addr + rela->addend;
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break;
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case R_RISCV_RELATIVE:
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*where = (Elf32_Addr)((uint8_t *)elf->psegment - elf->svaddr + rela->addend);
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break;
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case R_RISCV_JUMP_SLOT:
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*where = addr;
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break;
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default:
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ESP_LOGE(TAG, "info=%d is not supported\n", ELF_R_TYPE(rela->info));
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return -EINVAL;
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}
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return 0;
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}
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