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author | Yury Norov <ynorov@caviumnetworks.com> | 2017-01-23 17:07:13 +0000 |
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committer | Nick Clifton <nickc@redhat.com> | 2017-01-23 17:07:13 +0000 |
commit | 2d0ca824112f269a883cd04d344614ccab3baaf4 (patch) | |
tree | 5a55382ca10744fd0cc2d58cf9f4b05c05b9a1c8 /bfd/elfnn-aarch64.c | |
parent | c49f9d0fdaea8c2e5f78e20bec113fe3cf1b79f0 (diff) | |
download | gdb-2d0ca824112f269a883cd04d344614ccab3baaf4.zip gdb-2d0ca824112f269a883cd04d344614ccab3baaf4.tar.gz gdb-2d0ca824112f269a883cd04d344614ccab3baaf4.tar.bz2 |
Fix AArch64 relocation handling in ILP32 mode.
bfd * elfnn-aarch64.c: Fix relaxations for ILP32 mode.
ld * testsuite/ld-aarch64/aarch64-elf.exp: Run new tests.
* testsuite/ld-aarch64/tls-desc-ie-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-all-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-gd-le-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-gdesc-le-2-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-gdesc-le-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-ie-le-2-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-ie-le-3-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-ie-le-ilp32.d: New test.
* testsuite/ld-aarch64/tls-tiny-desc-ie-ilp32.d: New test.
* testsuite/ld-aarch64/tls-tiny-desc-le-ilp32.d: New test.
* testsuite/ld-aarch64/tls-tiny-gd-ie-ilp32.d: New test.
* testsuite/ld-aarch64/tls-tiny-gd-le-ilp32.d: New test.
Diffstat (limited to 'bfd/elfnn-aarch64.c')
-rw-r--r-- | bfd/elfnn-aarch64.c | 205 |
1 files changed, 115 insertions, 90 deletions
diff --git a/bfd/elfnn-aarch64.c b/bfd/elfnn-aarch64.c index 213cf55..c86a3e1 100644 --- a/bfd/elfnn-aarch64.c +++ b/bfd/elfnn-aarch64.c @@ -258,7 +258,7 @@ #define PLT_SMALL_ENTRY_SIZE (16) #define PLT_TLSDESC_ENTRY_SIZE (32) -/* Encoding of the nop instruction */ +/* Encoding of the nop instruction. */ #define INSN_NOP 0xd503201f #define aarch64_compute_jump_table_size(htab) \ @@ -3266,9 +3266,7 @@ group_sections (struct elf_aarch64_link_hash_table *htab, For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2 is set equal to RT. - For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned. - - */ + For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned. */ static bfd_boolean aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rt2, @@ -5630,6 +5628,35 @@ elfNN_aarch64_final_link_relocate (reloc_howto_type *howto, howto, value); } +/* LP64 and ILP32 operates on x- and w-registers respectively. + Next definitions take into account the difference between + corresponding machine codes. R means x-register if the target + arch is LP64, and w-register if the target is ILP32. */ + +#if ARCH_SIZE == 64 +# define add_R0_R0 (0x91000000) +# define add_R0_R0_R1 (0x8b000020) +# define add_R0_R1 (0x91400020) +# define ldr_R0 (0x58000000) +# define ldr_R0_mask(i) (i & 0xffffffe0) +# define ldr_R0_x0 (0xf9400000) +# define ldr_hw_R0 (0xf2a00000) +# define movk_R0 (0xf2800000) +# define movz_R0 (0xd2a00000) +# define movz_hw_R0 (0xd2c00000) +#else /*ARCH_SIZE == 32 */ +# define add_R0_R0 (0x11000000) +# define add_R0_R0_R1 (0x0b000020) +# define add_R0_R1 (0x11400020) +# define ldr_R0 (0x18000000) +# define ldr_R0_mask(i) (i & 0xbfffffe0) +# define ldr_R0_x0 (0xb9400000) +# define ldr_hw_R0 (0x72a00000) +# define movk_R0 (0x72800000) +# define movz_R0 (0x52a00000) +# define movz_hw_R0 (0x52c00000) +#endif + /* Handle TLS relaxations. Relaxing is possible for symbols that use R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static link. @@ -5656,11 +5683,12 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, if (is_local) { /* GD->LE relaxation: - adrp x0, :tlsgd:var => movz x0, :tprel_g1:var + adrp x0, :tlsgd:var => movz R0, :tprel_g1:var or - adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var - */ - bfd_putl32 (0xd2a00000, contents + rel->r_offset); + adrp x0, :tlsdesc:var => movz R0, :tprel_g1:var + + Where R is x for LP64, and w for ILP32. */ + bfd_putl32 (movz_R0, contents + rel->r_offset); return bfd_reloc_continue; } else @@ -5681,11 +5709,12 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, if (is_local) { /* Tiny TLSDESC->LE relaxation: - ldr x1, :tlsdesc:var => movz x0, #:tprel_g1:var - adr x0, :tlsdesc:var => movk x0, #:tprel_g0_nc:var + ldr x1, :tlsdesc:var => movz R0, #:tprel_g1:var + adr x0, :tlsdesc:var => movk R0, #:tprel_g0_nc:var .tlsdesccall var blr x1 => nop - */ + + Where R is x for LP64, and w for ILP32. */ BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21)); BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL)); @@ -5693,8 +5722,8 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, AARCH64_R (TLSLE_MOVW_TPREL_G0_NC)); rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); - bfd_putl32 (0xd2a00000, contents + rel->r_offset); - bfd_putl32 (0xf2800000, contents + rel->r_offset + 4); + bfd_putl32 (movz_R0, contents + rel->r_offset); + bfd_putl32 (movk_R0, contents + rel->r_offset + 4); bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8); return bfd_reloc_continue; } @@ -5712,7 +5741,7 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); - bfd_putl32 (0x58000000, contents + rel->r_offset); + bfd_putl32 (ldr_R0, contents + rel->r_offset); bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4); bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8); return bfd_reloc_continue; @@ -5723,16 +5752,17 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, { /* Tiny GD->LE relaxation: adr x0, :tlsgd:var => mrs x1, tpidr_el0 - bl __tls_get_addr => add x0, x1, #:tprel_hi12:x, lsl #12 - nop => add x0, x0, #:tprel_lo12_nc:x - */ + bl __tls_get_addr => add R0, R1, #:tprel_hi12:x, lsl #12 + nop => add R0, R0, #:tprel_lo12_nc:x + + Where R is x for LP64, and x for Ilp32. */ /* First kill the tls_get_addr reloc on the bl instruction. */ BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); bfd_putl32 (0xd53bd041, contents + rel->r_offset + 0); - bfd_putl32 (0x91400020, contents + rel->r_offset + 4); - bfd_putl32 (0x91000000, contents + rel->r_offset + 8); + bfd_putl32 (add_R0_R1, contents + rel->r_offset + 4); + bfd_putl32 (add_R0_R0, contents + rel->r_offset + 8); rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), AARCH64_R (TLSLE_ADD_TPREL_LO12_NC)); @@ -5748,18 +5778,19 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, else { /* Tiny GD->IE relaxation: - adr x0, :tlsgd:var => ldr x0, :gottprel:var + adr x0, :tlsgd:var => ldr R0, :gottprel:var bl __tls_get_addr => mrs x1, tpidr_el0 - nop => add x0, x0, x1 - */ + nop => add R0, R0, R1 + + Where R is x for LP64, and w for Ilp32. */ /* First kill the tls_get_addr reloc on the bl instruction. */ BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); - bfd_putl32 (0x58000000, contents + rel->r_offset); + bfd_putl32 (ldr_R0, contents + rel->r_offset); bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4); - bfd_putl32 (0x8b000020, contents + rel->r_offset + 8); + bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 8); return bfd_reloc_continue; } @@ -5782,11 +5813,11 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, AARCH64_R (TLSLE_MOVW_TPREL_G0_NC)); rel[2].r_offset = rel->r_offset + 8; - bfd_putl32 (0xd2c00000, contents + rel->r_offset + 0); - bfd_putl32 (0xf2a00000, contents + rel->r_offset + 4); - bfd_putl32 (0xf2800000, contents + rel->r_offset + 8); + bfd_putl32 (movz_hw_R0, contents + rel->r_offset + 0); + bfd_putl32 (ldr_hw_R0, contents + rel->r_offset + 4); + bfd_putl32 (movk_R0, contents + rel->r_offset + 8); bfd_putl32 (0xd53bd041, contents + rel->r_offset + 12); - bfd_putl32 (0x8b000020, contents + rel->r_offset + 16); + bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 16); } else { @@ -5799,9 +5830,9 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, */ rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); bfd_putl32 (0xd2a80000, contents + rel->r_offset + 0); - bfd_putl32 (0x58000000, contents + rel->r_offset + 8); + bfd_putl32 (ldr_R0, contents + rel->r_offset + 8); bfd_putl32 (0xd53bd041, contents + rel->r_offset + 12); - bfd_putl32 (0x8b000020, contents + rel->r_offset + 16); + bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 16); } return bfd_reloc_continue; @@ -5817,18 +5848,19 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, { /* GD->LE relaxation: ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var - */ - bfd_putl32 (0xf2800000, contents + rel->r_offset); + + Where R is x for lp64 mode, and w for ILP32 mode. */ + bfd_putl32 (movk_R0, contents + rel->r_offset); return bfd_reloc_continue; } else { /* GD->IE relaxation: - ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var] - */ + ldr xd, [x0, #:tlsdesc_lo12:var] => ldr R0, [x0, #:gottprel_lo12:var] + + Where R is x for lp64 mode, and w for ILP32 mode. */ insn = bfd_getl32 (contents + rel->r_offset); - insn &= 0xffffffe0; - bfd_putl32 (insn, contents + rel->r_offset); + bfd_putl32 (ldr_R0_mask (insn), contents + rel->r_offset); return bfd_reloc_continue; } @@ -5836,18 +5868,19 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, if (is_local) { /* GD->LE relaxation - add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var + add x0, #:tlsgd_lo12:var => movk R0, :tprel_g0_nc:var bl __tls_get_addr => mrs x1, tpidr_el0 - nop => add x0, x1, x0 - */ + nop => add R0, R1, R0 + + Where R is x for lp64 mode, and w for ILP32 mode. */ /* First kill the tls_get_addr reloc on the bl instruction. */ BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); - bfd_putl32 (0xf2800000, contents + rel->r_offset); + bfd_putl32 (movk_R0, contents + rel->r_offset); bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4); - bfd_putl32 (0x8b000020, contents + rel->r_offset + 8); + bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 8); return bfd_reloc_continue; } else @@ -5868,14 +5901,9 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, /* We choose to fixup the BL and NOP instructions using the offset from the second relocation to allow flexibility in scheduling instructions between the ADD and BL. */ -#if ARCH_SIZE == 32 - bfd_putl32 (0xb9400000, contents + rel->r_offset); - bfd_putl32 (0x0b000020, contents + rel[1].r_offset + 4); -#else - bfd_putl32 (0xf9400000, contents + rel->r_offset); - bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4); -#endif + bfd_putl32 (ldr_R0_x0, contents + rel->r_offset); bfd_putl32 (0xd53bd041, contents + rel[1].r_offset); + bfd_putl32 (add_R0_R0_R1, contents + rel[1].r_offset + 4); return bfd_reloc_continue; } @@ -5893,70 +5921,76 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, if (is_local) { /* GD->LE relaxation: - ldr xd, [gp, xn] => movk x0, #:tprel_g0_nc:var - */ - bfd_putl32 (0xf2800000, contents + rel->r_offset); + ldr xd, [gp, xn] => movk R0, #:tprel_g0_nc:var + + Where R is x for lp64 mode, and w for ILP32 mode. */ + bfd_putl32 (movk_R0, contents + rel->r_offset); return bfd_reloc_continue; } else { /* GD->IE relaxation: - ldr xd, [gp, xn] => ldr x0, [gp, xn] - */ + ldr xd, [gp, xn] => ldr R0, [gp, xn] + + Where R is x for lp64 mode, and w for ILP32 mode. */ insn = bfd_getl32 (contents + rel->r_offset); - insn &= 0xffffffe0; - bfd_putl32 (insn, contents + rel->r_offset); + bfd_putl32 (ldr_R0_mask (insn), contents + rel->r_offset); return bfd_reloc_ok; } case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: /* GD->LE relaxation: - movk xd, #:tlsdesc_off_g0_nc:var => movk x0, #:tprel_g1_nc:var, lsl #16 + movk xd, #:tlsdesc_off_g0_nc:var => movk R0, #:tprel_g1_nc:var, lsl #16 GD->IE relaxation: - movk xd, #:tlsdesc_off_g0_nc:var => movk xd, #:gottprel_g0_nc:var - */ + movk xd, #:tlsdesc_off_g0_nc:var => movk Rd, #:gottprel_g0_nc:var + + Where R is x for lp64 mode, and w for ILP32 mode. */ if (is_local) - bfd_putl32 (0xf2a00000, contents + rel->r_offset); + bfd_putl32 (ldr_hw_R0, contents + rel->r_offset); return bfd_reloc_continue; case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: if (is_local) { /* GD->LE relaxation: - movz xd, #:tlsdesc_off_g1:var => movz x0, #:tprel_g2:var, lsl #32 - */ - bfd_putl32 (0xd2c00000, contents + rel->r_offset); + movz xd, #:tlsdesc_off_g1:var => movz R0, #:tprel_g2:var, lsl #32 + + Where R is x for lp64 mode, and w for ILP32 mode. */ + bfd_putl32 (movz_hw_R0, contents + rel->r_offset); return bfd_reloc_continue; } else { /* GD->IE relaxation: - movz xd, #:tlsdesc_off_g1:var => movz xd, #:gottprel_g1:var, lsl #16 - */ + movz xd, #:tlsdesc_off_g1:var => movz Rd, #:gottprel_g1:var, lsl #16 + + Where R is x for lp64 mode, and w for ILP32 mode. */ insn = bfd_getl32 (contents + rel->r_offset); - bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset); + bfd_putl32 (movz_R0 | (insn & 0x1f), contents + rel->r_offset); return bfd_reloc_continue; } case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: /* IE->LE relaxation: - adrp xd, :gottprel:var => movz xd, :tprel_g1:var - */ + adrp xd, :gottprel:var => movz Rd, :tprel_g1:var + + Where R is x for lp64 mode, and w for ILP32 mode. */ if (is_local) { insn = bfd_getl32 (contents + rel->r_offset); - bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset); + bfd_putl32 (movz_R0 | (insn & 0x1f), contents + rel->r_offset); } return bfd_reloc_continue; case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: /* IE->LE relaxation: - ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var - */ + ldr xd, [xm, #:gottprel_lo12:var] => movk Rd, :tprel_g0_nc:var + + Where R is x for lp64 mode, and w for ILP32 mode. */ if (is_local) { insn = bfd_getl32 (contents + rel->r_offset); - bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset); + bfd_putl32 (movk_R0 | (insn & 0x1f), contents + rel->r_offset); } return bfd_reloc_continue; @@ -5973,11 +6007,8 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, /* No need of CALL26 relocation for tls_get_addr. */ rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); bfd_putl32 (0xd53bd040, contents + rel->r_offset + 0); -#if ARCH_SIZE == 64 - bfd_putl32 (0x91004000, contents + rel->r_offset + 4); -#else - bfd_putl32 (0x11002000, contents + rel->r_offset + 4); -#endif + bfd_putl32 (add_R0_R0 | (TCB_SIZE << 10), + contents + rel->r_offset + 4); return bfd_reloc_ok; } return bfd_reloc_continue; @@ -6005,11 +6036,8 @@ elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26)); /* No need of CALL26 relocation for tls_get_addr. */ rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); -#if ARCH_SIZE == 64 - bfd_putl32 (0x91004000, contents + rel->r_offset + 0); -#else - bfd_putl32 (0x11002000, contents + rel->r_offset + 0); -#endif + bfd_putl32 (add_R0_R0 | (TCB_SIZE << 10), + contents + rel->r_offset + 0); bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4); return bfd_reloc_ok; } @@ -7158,7 +7186,7 @@ elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info, break; } - /* It is referenced by a non-shared object. */ + /* It is referenced by a non-shared object. */ h->ref_regular = 1; h->root.non_ir_ref = 1; } @@ -7961,8 +7989,7 @@ elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) because we will also be presented with the concrete instance of the symbol and elfNN_aarch64_copy_indirect_symbol () will have been called to copy all relevant data from the generic to the concrete - symbol instance. - */ + symbol instance. */ if (h->root.type == bfd_link_hash_indirect) return TRUE; @@ -8251,8 +8278,7 @@ elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h, because we will also be presented with the concrete instance of the symbol and elfNN_aarch64_copy_indirect_symbol () will have been called to copy all relevant data from the generic to the concrete - symbol instance. - */ + symbol instance. */ if (h->root.type == bfd_link_hash_indirect) return TRUE; @@ -8344,6 +8370,7 @@ aarch64_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf) /* This is the most important function of all . Innocuosly named though ! */ + static bfd_boolean elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, struct bfd_link_info *info) @@ -8574,7 +8601,6 @@ elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, adjust_dynamic_symbol is called, and it is that function which decides whether anything needs to go into these sections. */ - s->flags |= SEC_EXCLUDE; continue; } @@ -8814,6 +8840,7 @@ elfNN_aarch64_always_size_sections (bfd *output_bfd, /* Finish up dynamic symbol handling. We set the contents of various dynamic sections here. */ + static bfd_boolean elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info, @@ -8950,7 +8977,6 @@ do_glob_dat: bfd_byte *loc; /* This symbol needs a copy reloc. Set it up. */ - if (h->dynindx == -1 || (h->root.type != bfd_link_hash_defined && h->root.type != bfd_link_hash_defweak) @@ -9013,8 +9039,7 @@ elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED, // GOTPLT entry for this. br x17 PLT0 will be slightly different in ELF32 due to different got entry - size. - */ + size. */ bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */ bfd_vma plt_base; |