From a2e1db00c76bcad0594654d78af76d0e12a217ee Mon Sep 17 00:00:00 2001 From: Renlin Li Date: Fri, 2 Oct 2015 14:51:26 +0100 Subject: [PATCH] [LD][AARCH64]Add BFD_RELOC_AARCH64_LD64_GOTOFF_LO15 Support. bfd/ 2015-10-02 Renlin Li * elfnn-aarch64.c (aarch64_reloc_got_type): Add BFD_RELOC_AARCH64_LD_64_GOTOFF_LO15 support. (elfNN_aarch64_gc_sweep_hook): Likewise. (elfNN_aarch64_check_relocs): Likewise * elfxx-aarch64.c (_bfd_aarch64_elf_put_addend): Likewise. (_bfd_aarch64_elf_resolve_relocation): Likewise (elfNN_aarch64_final_link_relocate): Calculate offset within GOT. ld/testsuite/ 2015-10-02 Renlin Li * ld-aarch64/emit-relocs-310.d: New. * ld-aarch64/emit-relocs-310.s: New. * ld-aarch64/aarch64-elf.exp: Run the test. --- bfd/ChangeLog | 10 +++++ bfd/elfnn-aarch64.c | 72 +++++++++++++++++++++++++++++++ bfd/elfxx-aarch64.c | 2 + ld/testsuite/ChangeLog | 6 +++ ld/testsuite/ld-aarch64/aarch64-elf.exp | 2 +- ld/testsuite/ld-aarch64/emit-relocs-310.d | 21 +++++++++ ld/testsuite/ld-aarch64/emit-relocs-310.s | 11 +++++ 7 files changed, 123 insertions(+), 1 deletion(-) create mode 100644 ld/testsuite/ld-aarch64/emit-relocs-310.d create mode 100644 ld/testsuite/ld-aarch64/emit-relocs-310.s diff --git a/bfd/ChangeLog b/bfd/ChangeLog index b33cb3c..1413d10 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,15 @@ 2015-10-02 Renlin Li + * elfnn-aarch64.c (aarch64_reloc_got_type): Add + BFD_RELOC_AARCH64_LD_64_GOTOFF_LO15 support. + (elfNN_aarch64_gc_sweep_hook): Likewise. + (elfNN_aarch64_check_relocs): Likewise + * elfxx-aarch64.c (_bfd_aarch64_elf_put_addend): Likewise. + (_bfd_aarch64_elf_resolve_relocation): Likewise + (elfNN_aarch64_final_link_relocate): Calculate offset within GOT. + +2015-10-02 Renlin Li + * elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Change if to switch statement. diff --git a/bfd/elfnn-aarch64.c b/bfd/elfnn-aarch64.c index 2157ccd..adef278 100644 --- a/bfd/elfnn-aarch64.c +++ b/bfd/elfnn-aarch64.c @@ -4414,6 +4414,7 @@ aarch64_reloc_got_type (bfd_reloc_code_real_type r_type) case BFD_RELOC_AARCH64_GOT_LD_PREL19: case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: + case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: return GOT_NORMAL; @@ -4963,6 +4964,7 @@ elfNN_aarch64_final_link_relocate (reloc_howto_type *howto, case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: + case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: base_got = globals->root.sgot; off = h->got.offset; @@ -5030,6 +5032,9 @@ elfNN_aarch64_final_link_relocate (reloc_howto_type *howto, addend = (globals->root.sgot->output_section->vma + globals->root.sgot->output_offset); break; + case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: + value = (value - globals->root.sgot->output_section->vma + - globals->root.sgot->output_offset); default: break; } @@ -5311,6 +5316,70 @@ elfNN_aarch64_final_link_relocate (reloc_howto_type *howto, break; + case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: + if (h != NULL) + value = aarch64_calculate_got_entry_vma (h, globals, info, value, + output_bfd, + unresolved_reloc_p); + else + { + struct elf_aarch64_local_symbol *locals + = elf_aarch64_locals (input_bfd); + + if (locals == NULL) + { + int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; + (*_bfd_error_handler) + (_("%B: Local symbol descriptor table be NULL when applying " + "relocation %s against local symbol"), + input_bfd, elfNN_aarch64_howto_table[howto_index].name); + abort (); + } + + off = symbol_got_offset (input_bfd, h, r_symndx); + base_got = globals->root.sgot; + if (base_got == NULL) + abort (); + + bfd_vma got_entry_addr = (base_got->output_section->vma + + base_got->output_offset + off); + + if (!symbol_got_offset_mark_p (input_bfd, h, r_symndx)) + { + bfd_put_64 (output_bfd, value, base_got->contents + off); + + if (bfd_link_pic (info)) + { + asection *s; + Elf_Internal_Rela outrel; + + /* For local symbol, we have done absolute relocation in static + linking stage. While for share library, we need to update + the content of GOT entry according to the share objects + loading base address. So we need to generate a + R_AARCH64_RELATIVE reloc for dynamic linker. */ + s = globals->root.srelgot; + if (s == NULL) + abort (); + + outrel.r_offset = got_entry_addr; + outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE)); + outrel.r_addend = value; + elf_append_rela (output_bfd, s, &outrel); + } + + symbol_got_offset_mark (input_bfd, h, r_symndx); + } + } + + /* Update the relocation value to GOT entry addr as we have transformed + the direct data access into indirect data access through GOT. */ + value = symbol_got_offset (input_bfd, h, r_symndx); + value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, + 0, weak_undef_p); + *unresolved_reloc_p = FALSE; + break; + case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: @@ -6392,6 +6461,7 @@ elfNN_aarch64_gc_sweep_hook (bfd *abfd, case BFD_RELOC_AARCH64_GOT_LD_PREL19: case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: + case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: @@ -6746,6 +6816,7 @@ elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info, case BFD_RELOC_AARCH64_JUMP26: case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: + case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: case BFD_RELOC_AARCH64_NN: @@ -6859,6 +6930,7 @@ elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info, case BFD_RELOC_AARCH64_GOT_LD_PREL19: case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: + case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: diff --git a/bfd/elfxx-aarch64.c b/bfd/elfxx-aarch64.c index 34bd1a6..c831f60 100644 --- a/bfd/elfxx-aarch64.c +++ b/bfd/elfxx-aarch64.c @@ -265,6 +265,7 @@ _bfd_aarch64_elf_put_addend (bfd *abfd, case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: + case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: case BFD_RELOC_AARCH64_LDST128_LO12: @@ -404,6 +405,7 @@ _bfd_aarch64_elf_resolve_relocation (bfd_reloc_code_real_type r_type, case BFD_RELOC_AARCH64_16: case BFD_RELOC_AARCH64_32: + case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: case BFD_RELOC_AARCH64_MOVW_G0: case BFD_RELOC_AARCH64_MOVW_G0_NC: case BFD_RELOC_AARCH64_MOVW_G0_S: diff --git a/ld/testsuite/ChangeLog b/ld/testsuite/ChangeLog index 41be8cd..d1446a7 100644 --- a/ld/testsuite/ChangeLog +++ b/ld/testsuite/ChangeLog @@ -1,3 +1,9 @@ +2015-10-02 Renlin Li + + * ld-aarch64/emit-relocs-310.d: New. + * ld-aarch64/emit-relocs-310.s: New. + * ld-aarch64/aarch64-elf.exp: Run the test. + 2015-10-01 H.J. Lu PR ld/19031 diff --git a/ld/testsuite/ld-aarch64/aarch64-elf.exp b/ld/testsuite/ld-aarch64/aarch64-elf.exp index 6f00961..1f68c17 100644 --- a/ld/testsuite/ld-aarch64/aarch64-elf.exp +++ b/ld/testsuite/ld-aarch64/aarch64-elf.exp @@ -121,7 +121,7 @@ run_dump_test "emit-relocs-309-up" run_dump_test "emit-relocs-309-low" run_dump_test "emit-relocs-309-up-bad" run_dump_test "emit-relocs-309-low-bad" -# 310 not done yet +run_dump_test "emit-relocs-310" run_dump_test "emit-relocs-311" run_dump_test "emit-relocs-312" run_dump_test "emit-relocs-313" diff --git a/ld/testsuite/ld-aarch64/emit-relocs-310.d b/ld/testsuite/ld-aarch64/emit-relocs-310.d new file mode 100644 index 0000000..0baf451 --- /dev/null +++ b/ld/testsuite/ld-aarch64/emit-relocs-310.d @@ -0,0 +1,21 @@ +#source: emit-relocs-310.s +#ld: -T relocs.ld --defsym globala=0x11000 --defsym globalb=0x45000 --defsym globalc=0x1234 -e0 --emit-relocs +#objdump: -dr + +.*: +file format .* + +Disassembly of section .text: + +0000000000010000 <\.text>: + 10000: 580000c1 ldr x1, 10018 <\.text\+0x18> + 10004: 100000a2 adr x2, 10018 <\.text\+0x18> + 10008: 8b010041 add x1, x2, x1 + 1000c: f9400820 ldr x0, \[x1,#16\] + 1000c: R_AARCH64_LD64_GOTOFF_LO15 globala + 10010: f9400c20 ldr x0, \[x1,#24\] + 10010: R_AARCH64_LD64_GOTOFF_LO15 globalb + 10014: f9400420 ldr x0, \[x1,#8\] + 10014: R_AARCH64_LD64_GOTOFF_LO15 globalc + 10018: 0000ffe8 .word 0x0000ffe8 + 10018: R_AARCH64_PREL64 _GLOBAL_OFFSET_TABLE_ + 1001c: 00000000 .word 0x00000000 diff --git a/ld/testsuite/ld-aarch64/emit-relocs-310.s b/ld/testsuite/ld-aarch64/emit-relocs-310.s new file mode 100644 index 0000000..abcbd34 --- /dev/null +++ b/ld/testsuite/ld-aarch64/emit-relocs-310.s @@ -0,0 +1,11 @@ + .text + ldr x1, .Lgot + adr x2, .Lgot + add x1, x2, x1 + + ldr x0, [x1, #:gotoff_lo15:globala] + ldr x0, [x1, #:gotoff_lo15:globalb] + ldr x0, [x1, #:gotoff_lo15:globalc] + +.Lgot: + .dword _GLOBAL_OFFSET_TABLE_ - . -- 2.7.4