#ifdef TARGET_DEFS_ONLY #define EM_TCC_TARGET EM_AARCH64 #define R_DATA_32 R_AARCH64_ABS32#define R_DATA_PTR R_AARCH64_ABS64#define R_JMP_SLOT R_AARCH64_JUMP_SLOT#define R_GLOB_DAT R_AARCH64_GLOB_DAT#define R_COPY R_AARCH64_COPY#define R_RELATIVE R_AARCH64_RELATIVE #define R_NUM R_AARCH64_NUM #define ELF_START_ADDR 0x00400000#define ELF_PAGE_SIZE 0x10000 #define PCRELATIVE_DLLPLT 1#define RELOCATE_DLLPLT 1 #else /* !TARGET_DEFS_ONLY */ #include "tcc.h" #ifdef NEED_RELOC_TYPE/* 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_AARCH64_ABS32: case R_AARCH64_ABS64: case R_AARCH64_PREL32: case R_AARCH64_MOVW_UABS_G0_NC: case R_AARCH64_MOVW_UABS_G1_NC: case R_AARCH64_MOVW_UABS_G2_NC: case R_AARCH64_MOVW_UABS_G3: case R_AARCH64_ADR_PREL_PG_HI21: case R_AARCH64_ADD_ABS_LO12_NC: case R_AARCH64_ADR_GOT_PAGE: case R_AARCH64_LD64_GOT_LO12_NC: case R_AARCH64_LDST128_ABS_LO12_NC: case R_AARCH64_LDST64_ABS_LO12_NC: case R_AARCH64_LDST32_ABS_LO12_NC: case R_AARCH64_LDST16_ABS_LO12_NC: case R_AARCH64_LDST8_ABS_LO12_NC: case R_AARCH64_TLSLE_ADD_TPREL_HI12: case R_AARCH64_TLSLE_ADD_TPREL_LO12: case R_AARCH64_GLOB_DAT: case R_AARCH64_COPY: return 0; case R_AARCH64_JUMP26: case R_AARCH64_CALL26: case R_AARCH64_JUMP_SLOT: case R_AARCH64_CONDBR19: case R_AARCH64_TSTBR14: 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_AARCH64_PREL32: case R_AARCH64_MOVW_UABS_G0_NC: case R_AARCH64_MOVW_UABS_G1_NC: case R_AARCH64_MOVW_UABS_G2_NC: case R_AARCH64_MOVW_UABS_G3: case R_AARCH64_ADR_PREL_PG_HI21: case R_AARCH64_ADD_ABS_LO12_NC: case R_AARCH64_LDST128_ABS_LO12_NC: case R_AARCH64_LDST64_ABS_LO12_NC: case R_AARCH64_LDST32_ABS_LO12_NC: case R_AARCH64_LDST16_ABS_LO12_NC: case R_AARCH64_LDST8_ABS_LO12_NC: case R_AARCH64_GLOB_DAT: case R_AARCH64_JUMP_SLOT: case R_AARCH64_COPY: case R_AARCH64_CONDBR19: case R_AARCH64_TSTBR14: case R_AARCH64_TLSLE_ADD_TPREL_HI12: case R_AARCH64_TLSLE_ADD_TPREL_LO12: return NO_GOTPLT_ENTRY; case R_AARCH64_ABS32: case R_AARCH64_ABS64: case R_AARCH64_JUMP26: case R_AARCH64_CALL26: return AUTO_GOTPLT_ENTRY; case R_AARCH64_ADR_GOT_PAGE: case R_AARCH64_LD64_GOT_LO12_NC: return ALWAYS_GOTPLT_ENTRY; } return -1;} #ifdef NEED_BUILD_GOTST_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); write32le(p, got_offset); write32le(p + 4, (uint64_t) got_offset >> 32); 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 + 16; uint64_t off = (got >> 12) - (plt >> 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, ARM64_STP_X_PRE | ARM64_RT(16) | ARM64_RT2(30) | ARM64_RN(31) | ARM64_IMM7(-2)); // stp x16,x30,[sp,#-16]! write32le(p + 4, (ARM64_ADRP | ARM64_RD(16) | // adrp x16,... (off & 0x1ffffc) << 3 | (off & 3) << 29)); write32le(p + 8, (ARM64_LDR_X | ARM64_RT(17) | ARM64_RN(16) | // ldr x17,[x16,#...] (got & 0xff8) << 7)); write32le(p + 12, (ARM64_ADD_IMM | ARM64_SF(1) | ARM64_RD(16) | ARM64_RN(16) | // add x16,x16,#... (got & 0xfff) << 10)); write32le(p + 16, ARM64_BR | ARM64_RN(17)); // br x17 write32le(p + 20, ARM64_NOP); // nop write32le(p + 24, ARM64_NOP); // nop write32le(p + 28, ARM64_NOP); // nop p += 32; got = s1->got->sh_addr; while (p < p_end) { uint64_t pc = plt + (p - s1->plt->data); uint64_t addr = got + read64le(p); uint64_t off = (addr >> 12) - (pc >> 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, (ARM64_ADRP | ARM64_RD(16) | // adrp x16,... (off & 0x1ffffc) << 3 | (off & 3) << 29)); write32le(p + 4, (ARM64_LDR_X | ARM64_RT(17) | ARM64_RN(16) | // ldr x17,[x16,#...] (addr & 0xff8) << 7)); write32le(p + 8, (ARM64_ADD_IMM | ARM64_SF(1) | ARM64_RD(16) | ARM64_RN(16) | // add x16,x16,#... (addr & 0xfff) << 10)); write32le(p + 12, ARM64_BR | ARM64_RN(17)); // br x17 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); } }}#endif#endif ST_FUNC void relocate(TCCState *s1, ElfW_Rel *rel, int type, unsigned char *ptr, addr_t addr, addr_t val){ int sym_index = ELFW(R_SYM)(rel->r_info), esym_index;#ifdef DEBUG_RELOC ElfW(Sym) *sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];#endif switch(type) { case R_AARCH64_ABS64: 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_AARCH64_ABS64); qrel->r_addend = rel->r_addend; qrel++; break; } else { qrel->r_info = ELFW(R_INFO)(0, R_AARCH64_RELATIVE); qrel->r_addend = read64le(ptr) + val; qrel++; } } add64le(ptr, val); return; case R_AARCH64_ABS32: if (s1->output_type & TCC_OUTPUT_DYN) { /* XXX: this logic may depend on TCC's codegen now TCC uses R_AARCH64_RELATIVE even for a 64bit pointer */ qrel->r_offset = rel->r_offset; qrel->r_info = ELFW(R_INFO)(0, R_AARCH64_RELATIVE); /* Use sign extension! */ qrel->r_addend = (int)read32le(ptr) + val; qrel++; } add32le(ptr, val); return; case R_AARCH64_PREL32: if (s1->output_type == TCC_OUTPUT_DLL) { /* 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_AARCH64_PREL32); /* Use sign extension! */ qrel->r_addend = (int)read32le(ptr) + rel->r_addend; qrel++; break; } } add32le(ptr, val - addr); return; case R_AARCH64_MOVW_UABS_G0_NC: write32le(ptr, ((read32le(ptr) & 0xffe0001f) | (val & 0xffff) << 5)); return; case R_AARCH64_MOVW_UABS_G1_NC: write32le(ptr, ((read32le(ptr) & 0xffe0001f) | (val >> 16 & 0xffff) << 5)); return; case R_AARCH64_MOVW_UABS_G2_NC: write32le(ptr, ((read32le(ptr) & 0xffe0001f) | (val >> 32 & 0xffff) << 5)); return; case R_AARCH64_MOVW_UABS_G3: write32le(ptr, ((read32le(ptr) & 0xffe0001f) | (val >> 48 & 0xffff) << 5)); return; case R_AARCH64_ADR_PREL_PG_HI21: { uint64_t off = (val >> 12) - (addr >> 12);#ifdef TCC_TARGET_PE /* Weak undefined symbols resolve to address 0 on PE. ADRP cannot encode that from the default 64-bit image base, so materialize zero directly and let the paired ADD handle any low addend. */ if ((off + ((uint64_t)1 << 20)) >> 21) { ElfW(Sym) *sym = &((ElfW(Sym) *)symtab_section->data)[sym_index]; if (sym->st_shndx == SHN_UNDEF && ELFW(ST_BIND)(sym->st_info) == STB_WEAK) { write32le(ptr, 0xd2800000 | (read32le(ptr) & 0x1f)); return; } tcc_error_noabort("R_AARCH64_ADR_PREL_PG_HI21 relocation failed"); }#else if ((off + ((uint64_t)1 << 20)) >> 21) tcc_error_noabort("R_AARCH64_ADR_PREL_PG_HI21 relocation failed");#endif write32le(ptr, ((read32le(ptr) & 0x9f00001f) | (off & 0x1ffffc) << 3 | (off & 3) << 29)); return; } case R_AARCH64_ADD_ABS_LO12_NC: case R_AARCH64_LDST8_ABS_LO12_NC: write32le(ptr, ((read32le(ptr) & 0xffc003ff) | (val & 0xfff) << 10)); return; case R_AARCH64_LDST16_ABS_LO12_NC: write32le(ptr, ((read32le(ptr) & 0xffc003ff) | (val & 0xffe) << 9)); return; case R_AARCH64_LDST32_ABS_LO12_NC: write32le(ptr, ((read32le(ptr) & 0xffc003ff) | (val & 0xffc) << 8)); return; case R_AARCH64_LDST64_ABS_LO12_NC: write32le(ptr, ((read32le(ptr) & 0xffc003ff) | (val & 0xff8) << 7)); return; case R_AARCH64_LDST128_ABS_LO12_NC: write32le(ptr, ((read32le(ptr) & 0xffc003ff) | (val & 0xff0) << 6)); return; case R_AARCH64_CONDBR19: /* Conditional branch: 19-bit signed offset, bits 23:5 */#ifdef DEBUG_RELOC printf ("reloc %d @ 0x%lx: val=0x%lx name=%s\n", type, addr, val, (char *) symtab_section->link->data + sym->st_name);#endif if (((val - addr) + ((uint64_t)1 << 20)) & ~(uint64_t)0x1ffffc) tcc_error_noabort("R_AARCH64_CONDBR19 relocation failed" " (val=%lx, addr=%lx)", (long)val, (long)addr); write32le(ptr, ((read32le(ptr) & 0xff00001f) | (((val - addr) >> 2 & 0x7ffff) << 5))); return; case R_AARCH64_TSTBR14: /* Test and branch: 14-bit signed offset, bits 20:5 */#ifdef DEBUG_RELOC printf ("reloc %d @ 0x%lx: val=0x%lx name=%s\n", type, addr, val, (char *) symtab_section->link->data + sym->st_name);#endif if (((val - addr) + ((uint64_t)1 << 15)) & ~(uint64_t)0xfffc) tcc_error_noabort("R_AARCH64_TSTBR14 relocation failed" " (val=%lx, addr=%lx)", (long)val, (long)addr); write32le(ptr, ((read32le(ptr) & 0xfff8001f) | (((val - addr) >> 2 & 0x3fff) << 5))); return; case R_AARCH64_JUMP26: case R_AARCH64_CALL26: { const char *name;#ifdef DEBUG_RELOC printf ("reloc %d @ 0x%lx: val=0x%lx name=%s\n", type, addr, val, (char *) symtab_section->link->data + sym->st_name);#endif if (((val - addr) + ((uint64_t)1 << 27)) & ~(uint64_t)0xffffffc) {#ifdef TCC_TARGET_PE ElfW(Sym) *sym = &((ElfW(Sym) *)symtab_section->data)[sym_index]; if (sym->st_shndx == SHN_UNDEF && ELFW(ST_BIND)(sym->st_info) == STB_WEAK) { write32le(ptr, ARM64_NOP); /* nop */ return; }#endif name = (char *)symtab_section->link->data + ((ElfW(Sym) *)symtab_section->data)[sym_index].st_name; tcc_error_noabort("R_AARCH64_(JUMP|CALL)26 relocation failed" " for '%s' (val=%lx, addr=%lx)", name, (long)val, (long)addr); } write32le(ptr, (0x14000000 | (uint32_t)(type == R_AARCH64_CALL26) << 31 | ((val - addr) >> 2 & 0x3ffffff))); return; } case R_AARCH64_ADR_GOT_PAGE: { uint64_t off = (((s1->got->sh_addr + get_sym_attr(s1, sym_index, 0)->got_offset) >> 12) - (addr >> 12)); if ((off + ((uint64_t)1 << 20)) >> 21) tcc_error_noabort("R_AARCH64_ADR_GOT_PAGE relocation failed"); write32le(ptr, ((read32le(ptr) & 0x9f00001f) | (off & 0x1ffffc) << 3 | (off & 3) << 29)); return; } case R_AARCH64_LD64_GOT_LO12_NC: write32le(ptr, ((read32le(ptr) & 0xfff803ff) | ((s1->got->sh_addr + get_sym_attr(s1, sym_index, 0)->got_offset) & 0xff8) << 7)); return; case R_AARCH64_COPY: return; case R_AARCH64_GLOB_DAT: case R_AARCH64_JUMP_SLOT: /* They don't need addend */#ifdef DEBUG_RELOC printf ("reloc %d @ 0x%lx: val=0x%lx name=%s\n", type, addr, val - rel->r_addend, (char *) symtab_section->link->data + sym->st_name);#endif write64le(ptr, val - rel->r_addend); return; case R_AARCH64_TLSLE_ADD_TPREL_HI12: case R_AARCH64_TLSLE_ADD_TPREL_LO12: {#if TCC_TARGET_PE int64_t tp_offset = val - s1->tls_start;#else /* glibc arm64: tp points to tcbhead_t (DTV), TLS data starts after it */ int64_t tp_offset = val - s1->tls_start + 16;#endif int64_t imm; if (type == R_AARCH64_TLSLE_ADD_TPREL_HI12) imm = (tp_offset >> 12) & 0xfff; else imm = tp_offset & 0xfff; write32le(ptr, ((read32le(ptr) & 0xffc003ff) | (imm << 10))); return; } case R_AARCH64_RELATIVE:#ifdef TCC_TARGET_PE add32le(ptr, val - s1->pe_imagebase);#endif /* do nothing */ return; default: fprintf(stderr, "FIXME: handle reloc type %x at %x [%p] to %x\n", type, (unsigned)addr, ptr, (unsigned)val); return; }} #endif /* !TARGET_DEFS_ONLY */
#ifdef TARGET_DEFS_ONLY
#define EM_TCC_TARGET EM_AARCH64
#define R_DATA_32 R_AARCH64_ABS32
#define R_DATA_PTR R_AARCH64_ABS64
#define R_JMP_SLOT R_AARCH64_JUMP_SLOT
#define R_GLOB_DAT R_AARCH64_GLOB_DAT
#define R_COPY R_AARCH64_COPY
#define R_RELATIVE R_AARCH64_RELATIVE
#define R_NUM R_AARCH64_NUM
#define ELF_START_ADDR 0x00400000
#define ELF_PAGE_SIZE 0x10000
#define PCRELATIVE_DLLPLT 1
#define RELOCATE_DLLPLT 1
#else /* !TARGET_DEFS_ONLY */
#include "tcc.h"
#ifdef NEED_RELOC_TYPE
/* 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_AARCH64_ABS32:
case R_AARCH64_ABS64:
case R_AARCH64_PREL32:
case R_AARCH64_MOVW_UABS_G0_NC:
case R_AARCH64_MOVW_UABS_G1_NC:
case R_AARCH64_MOVW_UABS_G2_NC:
case R_AARCH64_MOVW_UABS_G3:
case R_AARCH64_ADR_PREL_PG_HI21:
case R_AARCH64_ADD_ABS_LO12_NC:
case R_AARCH64_ADR_GOT_PAGE:
case R_AARCH64_LD64_GOT_LO12_NC:
case R_AARCH64_LDST128_ABS_LO12_NC:
case R_AARCH64_LDST64_ABS_LO12_NC:
case R_AARCH64_LDST32_ABS_LO12_NC:
case R_AARCH64_LDST16_ABS_LO12_NC:
case R_AARCH64_LDST8_ABS_LO12_NC:
case R_AARCH64_TLSLE_ADD_TPREL_HI12:
case R_AARCH64_TLSLE_ADD_TPREL_LO12:
case R_AARCH64_GLOB_DAT:
case R_AARCH64_COPY:
return 0;
case R_AARCH64_JUMP26:
case R_AARCH64_CALL26:
case R_AARCH64_JUMP_SLOT:
case R_AARCH64_CONDBR19:
case R_AARCH64_TSTBR14:
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_AARCH64_PREL32:
case R_AARCH64_MOVW_UABS_G0_NC:
case R_AARCH64_MOVW_UABS_G1_NC:
case R_AARCH64_MOVW_UABS_G2_NC:
case R_AARCH64_MOVW_UABS_G3:
case R_AARCH64_ADR_PREL_PG_HI21:
case R_AARCH64_ADD_ABS_LO12_NC:
case R_AARCH64_LDST128_ABS_LO12_NC:
case R_AARCH64_LDST64_ABS_LO12_NC:
case R_AARCH64_LDST32_ABS_LO12_NC:
case R_AARCH64_LDST16_ABS_LO12_NC:
case R_AARCH64_LDST8_ABS_LO12_NC:
case R_AARCH64_GLOB_DAT:
case R_AARCH64_JUMP_SLOT:
case R_AARCH64_COPY:
case R_AARCH64_CONDBR19:
case R_AARCH64_TSTBR14:
case R_AARCH64_TLSLE_ADD_TPREL_HI12:
case R_AARCH64_TLSLE_ADD_TPREL_LO12:
return NO_GOTPLT_ENTRY;
case R_AARCH64_ABS32:
case R_AARCH64_ABS64:
case R_AARCH64_JUMP26:
case R_AARCH64_CALL26:
return AUTO_GOTPLT_ENTRY;
case R_AARCH64_ADR_GOT_PAGE:
case R_AARCH64_LD64_GOT_LO12_NC:
return ALWAYS_GOTPLT_ENTRY;
}
return -1;
}
#ifdef NEED_BUILD_GOT
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);
write32le(p, got_offset);
write32le(p + 4, (uint64_t) got_offset >> 32);
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 + 16;
uint64_t off = (got >> 12) - (plt >> 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, ARM64_STP_X_PRE | ARM64_RT(16) | ARM64_RT2(30) |
ARM64_RN(31) | ARM64_IMM7(-2)); // stp x16,x30,[sp,#-16]!
write32le(p + 4, (ARM64_ADRP | ARM64_RD(16) | // adrp x16,...
(off & 0x1ffffc) << 3 | (off & 3) << 29));
write32le(p + 8, (ARM64_LDR_X | ARM64_RT(17) | ARM64_RN(16) | // ldr x17,[x16,#...]
(got & 0xff8) << 7));
write32le(p + 12, (ARM64_ADD_IMM | ARM64_SF(1) | ARM64_RD(16) | ARM64_RN(16) | // add x16,x16,#...
(got & 0xfff) << 10));
write32le(p + 16, ARM64_BR | ARM64_RN(17)); // br x17
write32le(p + 20, ARM64_NOP); // nop
write32le(p + 24, ARM64_NOP); // nop
write32le(p + 28, ARM64_NOP); // nop
p += 32;
got = s1->got->sh_addr;
while (p < p_end) {
uint64_t pc = plt + (p - s1->plt->data);
uint64_t addr = got + read64le(p);
uint64_t off = (addr >> 12) - (pc >> 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, (ARM64_ADRP | ARM64_RD(16) | // adrp x16,...
(off & 0x1ffffc) << 3 | (off & 3) << 29));
write32le(p + 4, (ARM64_LDR_X | ARM64_RT(17) | ARM64_RN(16) | // ldr x17,[x16,#...]
(addr & 0xff8) << 7));
write32le(p + 8, (ARM64_ADD_IMM | ARM64_SF(1) | ARM64_RD(16) | ARM64_RN(16) | // add x16,x16,#...
(addr & 0xfff) << 10));
write32le(p + 12, ARM64_BR | ARM64_RN(17)); // br x17
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);
}
}
}
#endif
#endif
ST_FUNC void relocate(TCCState *s1, ElfW_Rel *rel, int type, unsigned char *ptr, addr_t addr, addr_t val)
{
int sym_index = ELFW(R_SYM)(rel->r_info), esym_index;
#ifdef DEBUG_RELOC
ElfW(Sym) *sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];
#endif
switch(type) {
case R_AARCH64_ABS64:
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_AARCH64_ABS64);
qrel->r_addend = rel->r_addend;
qrel++;
break;
} else {
qrel->r_info = ELFW(R_INFO)(0, R_AARCH64_RELATIVE);
qrel->r_addend = read64le(ptr) + val;
qrel++;
}
}
add64le(ptr, val);
return;
case R_AARCH64_ABS32:
if (s1->output_type & TCC_OUTPUT_DYN) {
/* XXX: this logic may depend on TCC's codegen
now TCC uses R_AARCH64_RELATIVE even for a 64bit pointer */
qrel->r_offset = rel->r_offset;
qrel->r_info = ELFW(R_INFO)(0, R_AARCH64_RELATIVE);
/* Use sign extension! */
qrel->r_addend = (int)read32le(ptr) + val;
qrel++;
}
add32le(ptr, val);
return;
case R_AARCH64_PREL32:
if (s1->output_type == TCC_OUTPUT_DLL) {
/* 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_AARCH64_PREL32);
/* Use sign extension! */
qrel->r_addend = (int)read32le(ptr) + rel->r_addend;
qrel++;
break;
}
}
add32le(ptr, val - addr);
return;
case R_AARCH64_MOVW_UABS_G0_NC:
write32le(ptr, ((read32le(ptr) & 0xffe0001f) |
(val & 0xffff) << 5));
return;
case R_AARCH64_MOVW_UABS_G1_NC:
write32le(ptr, ((read32le(ptr) & 0xffe0001f) |
(val >> 16 & 0xffff) << 5));
return;
case R_AARCH64_MOVW_UABS_G2_NC:
write32le(ptr, ((read32le(ptr) & 0xffe0001f) |
(val >> 32 & 0xffff) << 5));
return;
case R_AARCH64_MOVW_UABS_G3:
write32le(ptr, ((read32le(ptr) & 0xffe0001f) |
(val >> 48 & 0xffff) << 5));
return;
case R_AARCH64_ADR_PREL_PG_HI21: {
uint64_t off = (val >> 12) - (addr >> 12);
#ifdef TCC_TARGET_PE
/* Weak undefined symbols resolve to address 0 on PE. ADRP cannot
encode that from the default 64-bit image base, so materialize
zero directly and let the paired ADD handle any low addend. */
if ((off + ((uint64_t)1 << 20)) >> 21) {
ElfW(Sym) *sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];
if (sym->st_shndx == SHN_UNDEF
&& ELFW(ST_BIND)(sym->st_info) == STB_WEAK) {
write32le(ptr, 0xd2800000 | (read32le(ptr) & 0x1f));
return;
}
tcc_error_noabort("R_AARCH64_ADR_PREL_PG_HI21 relocation failed");
}
#else
if ((off + ((uint64_t)1 << 20)) >> 21)
tcc_error_noabort("R_AARCH64_ADR_PREL_PG_HI21 relocation failed");
#endif
write32le(ptr, ((read32le(ptr) & 0x9f00001f) |
(off & 0x1ffffc) << 3 | (off & 3) << 29));
return;
}
case R_AARCH64_ADD_ABS_LO12_NC:
case R_AARCH64_LDST8_ABS_LO12_NC:
write32le(ptr, ((read32le(ptr) & 0xffc003ff) |
(val & 0xfff) << 10));
return;
case R_AARCH64_LDST16_ABS_LO12_NC:
write32le(ptr, ((read32le(ptr) & 0xffc003ff) |
(val & 0xffe) << 9));
return;
case R_AARCH64_LDST32_ABS_LO12_NC:
write32le(ptr, ((read32le(ptr) & 0xffc003ff) |
(val & 0xffc) << 8));
return;
case R_AARCH64_LDST64_ABS_LO12_NC:
write32le(ptr, ((read32le(ptr) & 0xffc003ff) |
(val & 0xff8) << 7));
return;
case R_AARCH64_LDST128_ABS_LO12_NC:
write32le(ptr, ((read32le(ptr) & 0xffc003ff) |
(val & 0xff0) << 6));
return;
case R_AARCH64_CONDBR19:
/* Conditional branch: 19-bit signed offset, bits 23:5 */
#ifdef DEBUG_RELOC
printf ("reloc %d @ 0x%lx: val=0x%lx name=%s\n", type, addr, val,
(char *) symtab_section->link->data + sym->st_name);
#endif
if (((val - addr) + ((uint64_t)1 << 20)) & ~(uint64_t)0x1ffffc)
tcc_error_noabort("R_AARCH64_CONDBR19 relocation failed"
" (val=%lx, addr=%lx)", (long)val, (long)addr);
write32le(ptr, ((read32le(ptr) & 0xff00001f) |
(((val - addr) >> 2 & 0x7ffff) << 5)));
return;
case R_AARCH64_TSTBR14:
/* Test and branch: 14-bit signed offset, bits 20:5 */
#ifdef DEBUG_RELOC
printf ("reloc %d @ 0x%lx: val=0x%lx name=%s\n", type, addr, val,
(char *) symtab_section->link->data + sym->st_name);
#endif
if (((val - addr) + ((uint64_t)1 << 15)) & ~(uint64_t)0xfffc)
tcc_error_noabort("R_AARCH64_TSTBR14 relocation failed"
" (val=%lx, addr=%lx)", (long)val, (long)addr);
write32le(ptr, ((read32le(ptr) & 0xfff8001f) |
(((val - addr) >> 2 & 0x3fff) << 5)));
return;
case R_AARCH64_JUMP26:
case R_AARCH64_CALL26:
{
const char *name;
#ifdef DEBUG_RELOC
printf ("reloc %d @ 0x%lx: val=0x%lx name=%s\n", type, addr, val,
(char *) symtab_section->link->data + sym->st_name);
#endif
if (((val - addr) + ((uint64_t)1 << 27)) & ~(uint64_t)0xffffffc) {
#ifdef TCC_TARGET_PE
ElfW(Sym) *sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];
if (sym->st_shndx == SHN_UNDEF
&& ELFW(ST_BIND)(sym->st_info) == STB_WEAK) {
write32le(ptr, ARM64_NOP); /* nop */
return;
}
#endif
name = (char *)symtab_section->link->data +
((ElfW(Sym) *)symtab_section->data)[sym_index].st_name;
tcc_error_noabort("R_AARCH64_(JUMP|CALL)26 relocation failed"
" for '%s' (val=%lx, addr=%lx)",
name, (long)val, (long)addr);
}
write32le(ptr, (0x14000000 |
(uint32_t)(type == R_AARCH64_CALL26) << 31 |
((val - addr) >> 2 & 0x3ffffff)));
return;
}
case R_AARCH64_ADR_GOT_PAGE: {
uint64_t off =
(((s1->got->sh_addr +
get_sym_attr(s1, sym_index, 0)->got_offset) >> 12) - (addr >> 12));
if ((off + ((uint64_t)1 << 20)) >> 21)
tcc_error_noabort("R_AARCH64_ADR_GOT_PAGE relocation failed");
write32le(ptr, ((read32le(ptr) & 0x9f00001f) |
(off & 0x1ffffc) << 3 | (off & 3) << 29));
return;
}
case R_AARCH64_LD64_GOT_LO12_NC:
write32le(ptr,
((read32le(ptr) & 0xfff803ff) |
((s1->got->sh_addr +
get_sym_attr(s1, sym_index, 0)->got_offset) & 0xff8) << 7));
return;
case R_AARCH64_COPY:
return;
case R_AARCH64_GLOB_DAT:
case R_AARCH64_JUMP_SLOT:
/* They don't need addend */
#ifdef DEBUG_RELOC
printf ("reloc %d @ 0x%lx: val=0x%lx name=%s\n", type, addr,
val - rel->r_addend,
(char *) symtab_section->link->data + sym->st_name);
#endif
write64le(ptr, val - rel->r_addend);
return;
case R_AARCH64_TLSLE_ADD_TPREL_HI12:
case R_AARCH64_TLSLE_ADD_TPREL_LO12: {
#if TCC_TARGET_PE
int64_t tp_offset = val - s1->tls_start;
#else
/* glibc arm64: tp points to tcbhead_t (DTV), TLS data starts after it */
int64_t tp_offset = val - s1->tls_start + 16;
#endif
int64_t imm;
if (type == R_AARCH64_TLSLE_ADD_TPREL_HI12)
imm = (tp_offset >> 12) & 0xfff;
else
imm = tp_offset & 0xfff;
write32le(ptr, ((read32le(ptr) & 0xffc003ff) | (imm << 10)));
return;
}
case R_AARCH64_RELATIVE:
#ifdef TCC_TARGET_PE
add32le(ptr, val - s1->pe_imagebase);
#endif
/* do nothing */
return;
default:
fprintf(stderr, "FIXME: handle reloc type %x at %x [%p] to %x\n",
type, (unsigned)addr, ptr, (unsigned)val);
return;
}
}
#endif /* !TARGET_DEFS_ONLY */