#ifdef TARGET_DEFS_ONLY #define EM_TCC_TARGET EM_RISCV #define R_DATA_32  R_RISCV_32#define R_DATA_PTR R_RISCV_64#define R_JMP_SLOT R_RISCV_JUMP_SLOT#define R_GLOB_DAT R_RISCV_64#define R_COPY     R_RISCV_COPY#define R_RELATIVE R_RISCV_RELATIVE #define R_NUM      R_RISCV_NUM #define ELF_START_ADDR 0x00010000#define ELF_PAGE_SIZE 0x1000 #define PCRELATIVE_DLLPLT 1#define RELOCATE_DLLPLT 1 #else /* !TARGET_DEFS_ONLY */ //#define DEBUG_RELOC#include "tcc.h" /* Returns 1 for a code relocation, 0 for a data relocation. For unknown   relocations, returns -1. */ST_FUNC int code_reloc (int reloc_type){    switch (reloc_type) {     case R_RISCV_BRANCH:    case R_RISCV_CALL:    case R_RISCV_JAL:        return 1;     case R_RISCV_GOT_HI20:    case R_RISCV_PCREL_HI20:    case R_RISCV_PCREL_LO12_I:    case R_RISCV_PCREL_LO12_S:    case R_RISCV_32_PCREL:    case R_RISCV_SET6:    case R_RISCV_SET8:    case R_RISCV_SET16:    case R_RISCV_SUB6:    case R_RISCV_ADD16:    case R_RISCV_ADD32:    case R_RISCV_ADD64:    case R_RISCV_SUB8:    case R_RISCV_SUB16:    case R_RISCV_SUB32:    case R_RISCV_SUB64:    case R_RISCV_32:    case R_RISCV_64:    case R_RISCV_SET_ULEB128:    case R_RISCV_SUB_ULEB128:    case R_RISCV_TPREL_HI20:    case R_RISCV_TPREL_LO12_I:        return 0;     case R_RISCV_CALL_PLT:        return 1;    }    return -1;} /* Returns an enumerator to describe whether and when the relocation needs a   GOT and/or PLT entry to be created. See tcc.h for a description of the   different values. */ST_FUNC int gotplt_entry_type (int reloc_type){    switch (reloc_type) {    case R_RISCV_ALIGN:    case R_RISCV_RELAX:    case R_RISCV_RVC_BRANCH:    case R_RISCV_RVC_JUMP:    case R_RISCV_JUMP_SLOT:    case R_RISCV_SET6:    case R_RISCV_SET8:    case R_RISCV_SET16:    case R_RISCV_SUB6:    case R_RISCV_ADD16:    case R_RISCV_SUB8:    case R_RISCV_SUB16:    case R_RISCV_SET_ULEB128:    case R_RISCV_SUB_ULEB128:        return NO_GOTPLT_ENTRY;     case R_RISCV_BRANCH:    case R_RISCV_CALL:    case R_RISCV_PCREL_HI20:    case R_RISCV_PCREL_LO12_I:    case R_RISCV_PCREL_LO12_S:    case R_RISCV_32_PCREL:    case R_RISCV_ADD32:    case R_RISCV_ADD64:    case R_RISCV_SUB32:    case R_RISCV_SUB64:    case R_RISCV_32:    case R_RISCV_64:    case R_RISCV_JAL:    case R_RISCV_CALL_PLT:        return AUTO_GOTPLT_ENTRY;     case R_RISCV_GOT_HI20:        return ALWAYS_GOTPLT_ENTRY;     case R_RISCV_TPREL_HI20:    case R_RISCV_TPREL_LO12_I:        return NO_GOTPLT_ENTRY;    }    return -1;} ST_FUNC unsigned create_plt_entry(TCCState *s1, unsigned got_offset, struct sym_attr *attr){    Section *plt = s1->plt;    uint8_t *p;    unsigned plt_offset;     if (plt->data_offset == 0)        section_ptr_add(plt, 32);    plt_offset = plt->data_offset;     p = section_ptr_add(plt, 16);    write64le(p, got_offset);    return plt_offset;} /* relocate the PLT: compute addresses and offsets in the PLT now that final   address for PLT and GOT are known (see fill_program_header) */ST_FUNC void relocate_plt(TCCState *s1){    uint8_t *p, *p_end;     if (!s1->plt)      return;     p = s1->plt->data;    p_end = p + s1->plt->data_offset;     if (p < p_end) {        uint64_t plt = s1->plt->sh_addr;        uint64_t got = s1->got->sh_addr;        uint64_t off = (got - plt + 0x800) >> 12;        if ((off + ((uint32_t)1 << 20)) >> 21)            tcc_error_noabort("Failed relocating PLT (off=0x%lx, got=0x%lx, plt=0x%lx)", (long)off, (long)got, (long)plt);        write32le(p, 0x397 | (off << 12)); // auipc t2, %pcrel_hi(got)        write32le(p + 4, 0x41c30333); // sub t1, t1, t3        write32le(p + 8, 0x0003be03   // ld t3, %pcrel_lo(got)(t2)                         | (((got - plt) & 0xfff) << 20));        write32le(p + 12, 0xfd430313); // addi t1, t1, -(32+12)        write32le(p + 16, 0x00038293   // addi t0, t2, %pcrel_lo(got)                          | (((got - plt) & 0xfff) << 20));        write32le(p + 20, 0x00135313); // srli t1, t1, log2(16/PTRSIZE)        write32le(p + 24, 0x0082b283); // ld t0, PTRSIZE(t0)        write32le(p + 28, 0x000e0067); // jr t3        p += 32;        while (p < p_end) {            uint64_t pc = plt + (p - s1->plt->data);            uint64_t addr = got + read64le(p);            uint64_t off = (addr - pc + 0x800) >> 12;            if ((off + ((uint32_t)1 << 20)) >> 21)                tcc_error_noabort("Failed relocating PLT (off=0x%lx, addr=0x%lx, pc=0x%lx)", (long)off, (long)addr, (long)pc);            write32le(p, 0xe17 | (off << 12)); // auipc t3, %pcrel_hi(func@got)            write32le(p + 4, 0x000e3e03 // ld t3, %pcrel_lo(func@got)(t3)                             | (((addr - pc) & 0xfff) << 20));            write32le(p + 8, 0x000e0367); // jalr t1, t3            write32le(p + 12, 0x00000013); // nop            p += 16;        }    }     if (s1->plt->reloc) {        ElfW_Rel *rel;        p = s1->got->data;        for_each_elem(s1->plt->reloc, 0, rel, ElfW_Rel) {            write64le(p + rel->r_offset, s1->plt->sh_addr);	}    }} static void riscv64_record_pcrel_hi(TCCState *s1, addr_t addr, addr_t val){    struct pcrel_hi *entry = tcc_malloc(sizeof *entry);    entry->addr = addr;    entry->val = val;    dynarray_add(&s1->pcrel_hi_entries, &s1->nb_pcrel_hi_entries, entry);} static int riscv64_lookup_pcrel_hi(TCCState *s1, addr_t hi_addr, addr_t *hi_val){    int i;    for (i = s1->nb_pcrel_hi_entries; i > 0; ) {        struct pcrel_hi *entry = s1->pcrel_hi_entries[--i];        if (entry->addr == hi_addr) {            *hi_val = entry->val;            return 0;        }    }    return tcc_error_noabort("unsupported hi/lo pcrel reloc scheme");} ST_FUNC void relocate(TCCState *s1, ElfW_Rel *rel, int type, unsigned char *ptr,              addr_t addr, addr_t val){    uint64_t off64;    uint32_t off32;    int sym_index = ELFW(R_SYM)(rel->r_info), esym_index;    ElfW(Sym) *sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];     switch(type) {    case R_RISCV_ALIGN:    case R_RISCV_RELAX:        return;     case R_RISCV_BRANCH:        off64 = val - addr;        if ((off64 + (1 << 12)) & ~(uint64_t)0x1ffe)          tcc_error_noabort("R_RISCV_BRANCH relocation failed"                    " (val=%lx, addr=%lx)", (long)val, (long)addr);        off32 = off64 >> 1;        write32le(ptr, (read32le(ptr) & ~0xfe000f80)                       | ((off32 & 0x800) << 20)                       | ((off32 & 0x3f0) << 21)                       | ((off32 & 0x00f) << 8)                       | ((off32 & 0x400) >> 3));        return;    case R_RISCV_JAL:        off64 = val - addr;        if ((off64 + (1 << 21)) & ~(((uint64_t)1 << 22) - 2))          tcc_error_noabort("R_RISCV_JAL relocation failed"                    " (val=%lx, addr=%lx)", (long)val, (long)addr);        off32 = off64;        write32le(ptr, (read32le(ptr) & 0xfff)                       | (((off32 >> 12) &  0xff) << 12)                       | (((off32 >> 11) &     1) << 20)                       | (((off32 >>  1) & 0x3ff) << 21)                       | (((off32 >> 20) &     1) << 31));        return;    case R_RISCV_CALL:    case R_RISCV_CALL_PLT:        write32le(ptr, (read32le(ptr) & 0xfff)                       | ((val - addr + 0x800) & ~0xfff));        write32le(ptr + 4, (read32le(ptr + 4) & 0xfffff)                           | (((val - addr) & 0xfff) << 20));        return;    case R_RISCV_PCREL_HI20:#ifdef DEBUG_RELOC        printf("PCREL_HI20: val=%lx addr=%lx\n", (long)val, (long)addr);#endif        off64 = (int64_t)(val - addr + 0x800) >> 12;        if ((off64 + ((uint64_t)1 << 20)) >> 21)          tcc_error_noabort("R_RISCV_PCREL_HI20 relocation failed: off=%lx cond=%lx sym=%s",                    (long)off64, (long)((int64_t)(off64 + ((uint64_t)1 << 20)) >> 21),                    symtab_section->link->data + sym->st_name);        write32le(ptr, (read32le(ptr) & 0xfff)                       | ((off64 & 0xfffff) << 12));        riscv64_record_pcrel_hi(s1, addr, val);        return;    case R_RISCV_GOT_HI20:        val = s1->got->sh_addr + get_sym_attr(s1, sym_index, 0)->got_offset;        off64 = (int64_t)(val - addr + 0x800) >> 12;        if ((off64 + ((uint64_t)1 << 20)) >> 21)          tcc_error_noabort("R_RISCV_GOT_HI20 relocation failed");        write32le(ptr, (read32le(ptr) & 0xfff)                       | ((off64 & 0xfffff) << 12));        riscv64_record_pcrel_hi(s1, addr, val);        return;    case R_RISCV_PCREL_LO12_I:#ifdef DEBUG_RELOC        printf("PCREL_LO12_I: val=%lx addr=%lx\n", (long)val, (long)addr);#endif        addr = val;        riscv64_lookup_pcrel_hi(s1, addr, &val);        write32le(ptr, (read32le(ptr) & 0xfffff)                       | (((val - addr) & 0xfff) << 20));        return;    case R_RISCV_PCREL_LO12_S:        addr = val;        riscv64_lookup_pcrel_hi(s1, addr, &val);        off32 = val - addr;        write32le(ptr, (read32le(ptr) & ~0xfe000f80)                       | ((off32 & 0xfe0) << 20)                       | ((off32 & 0x01f) << 7));        return;     case R_RISCV_RVC_BRANCH:        off64 = (val - addr);        if ((off64 + (1 << 8)) & ~(uint64_t)0x1fe)          tcc_error_noabort("R_RISCV_RVC_BRANCH relocation failed"                    " (val=%lx, addr=%lx)", (long)val, (long)addr);        off32 = off64;        write16le(ptr, (read16le(ptr) & 0xe383)                       | (((off32 >> 5) & 1) << 2)                       | (((off32 >> 1) & 3) << 3)                       | (((off32 >> 6) & 3) << 5)                       | (((off32 >> 3) & 3) << 10)                       | (((off32 >> 8) & 1) << 12));        return;    case R_RISCV_RVC_JUMP:        off64 = (val - addr);        if ((off64 + (1 << 11)) & ~(uint64_t)0xffe)          tcc_error_noabort("R_RISCV_RVC_BRANCH relocation failed"                    " (val=%lx, addr=%lx)", (long)val, (long)addr);        off32 = off64;        write16le(ptr, (read16le(ptr) & 0xe003)                       | (((off32 >>  5) & 1) << 2)                       | (((off32 >>  1) & 7) << 3)                       | (((off32 >>  7) & 1) << 6)                       | (((off32 >>  6) & 1) << 7)                       | (((off32 >> 10) & 1) << 8)                       | (((off32 >>  8) & 3) << 9)                       | (((off32 >>  4) & 1) << 11)                       | (((off32 >> 11) & 1) << 12));        return;     case R_RISCV_32:        if (s1->output_type & TCC_OUTPUT_DYN) {            /* XXX: this logic may depend on TCC's codegen               now TCC uses R_RISCV_RELATIVE even for a 64bit pointer */            qrel->r_offset = rel->r_offset;            qrel->r_info = ELFW(R_INFO)(0, R_RISCV_RELATIVE);            /* Use sign extension! */            qrel->r_addend = (int)read32le(ptr) + val;            qrel++;        }        add32le(ptr, val);        return;    case R_RISCV_64:        if (s1->output_type & TCC_OUTPUT_DYN) {            esym_index = get_sym_attr(s1, sym_index, 0)->dyn_index;            qrel->r_offset = rel->r_offset;            if (esym_index) {                qrel->r_info = ELFW(R_INFO)(esym_index, R_RISCV_64);                qrel->r_addend = rel->r_addend;                qrel++;                break;            } else {                qrel->r_info = ELFW(R_INFO)(0, R_RISCV_RELATIVE);                qrel->r_addend = read64le(ptr) + val;                qrel++;            }        }    case R_RISCV_JUMP_SLOT:        add64le(ptr, val);        return;    case R_RISCV_ADD64:        write64le(ptr, read64le(ptr) + val);        return;    case R_RISCV_ADD32:        write32le(ptr, read32le(ptr) + val);        return;    case R_RISCV_SUB64:        write64le(ptr, read64le(ptr) - val);        return;    case R_RISCV_SUB32:        write32le(ptr, read32le(ptr) - val);        return;    case R_RISCV_ADD16:        write16le(ptr, read16le(ptr) + val);        return;    case R_RISCV_SUB8:        *ptr -= val;        return;    case R_RISCV_SUB16:        write16le(ptr, read16le(ptr) - val);        return;    case R_RISCV_SET6:        *ptr = (*ptr & ~0x3f) | (val & 0x3f);        return;    case R_RISCV_SET8:        *ptr = (*ptr & ~0xff) | (val & 0xff);        return;    case R_RISCV_SET16:        write16le(ptr, val);        return;    case R_RISCV_SUB6:        *ptr = (*ptr & ~0x3f) | ((*ptr - val) & 0x3f);        return;    case R_RISCV_32_PCREL:        if (s1->output_type & TCC_OUTPUT_DYN) {	    /* DLL relocation */	    esym_index = get_sym_attr(s1, sym_index, 0)->dyn_index;	    if (esym_index) {                qrel->r_offset = rel->r_offset;                qrel->r_info = ELFW(R_INFO)(esym_index, R_RISCV_32_PCREL);                /* Use sign extension! */                qrel->r_addend = (int)read32le(ptr) + rel->r_addend;                qrel++;		break;	    }        }	add32le(ptr, val - addr);        return;    case R_RISCV_SET_ULEB128:    case R_RISCV_SUB_ULEB128:	/* ignore. used in section .debug_loclists */        return;    case R_RISCV_COPY:        /* XXX */        return;    case R_RISCV_RELATIVE:        /* R_RISCV_RELATIVE value is already applied in R_RISCV_32/64           dynamic output paths, but we need this case for incoming           RELATIVE relocations from object files. */        return;     case R_RISCV_TPREL_HI20:    case R_RISCV_TPREL_LO12_I: {        int64_t tp_offset = val - s1->tls_start;        if (type == R_RISCV_TPREL_HI20) {            off64 = (int64_t)(tp_offset + 0x800) >> 12;            if ((off64 + ((uint64_t)1 << 20)) >> 21)                tcc_error_noabort("R_RISCV_TPREL_HI20 relocation failed");            write32le(ptr, (read32le(ptr) & 0xfff)                           | ((off64 & 0xfffff) << 12));        } else {            write32le(ptr, (read32le(ptr) & 0xfffff)                           | (((tp_offset) & 0xfff) << 20));        }        return;    }     default:        fprintf(stderr, "FIXME: handle reloc type %x at %x [%p] to %x\n",                type, (unsigned)addr, ptr, (unsigned)val);        return;    }}#endif