From 02b236d0ba03993b670a9370c00e1bcb15951c01 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Tue, 14 Aug 2007 19:48:21 +0000 Subject: [PATCH] bfd/ 2007-08-14 H.J. Lu PR ld/4918 * elf32-i386.c (elf_i386_relocate_section): Allow R_386_PC32 on ___tls_get_addr for GD->LE/LD->LE transitions when not building shared library. * elf64-x86-64.c (elf64_x86_64_relocate_section): Allow R_X86_64_PC32 on __tls_get_addr for GD->LE/LD->LE transitions when not building shared library. ld/testsuite/ 2007-08-14 H.J. Lu PR ld/4918 * ld-i386/i386.exp (i386tests): Add tlsgd1 and tlsld1 tests. * ld-x86-64/x86-64.exp (x86_64tests): Likewise. * ld-i386/tlsgd1.dd: New file. * ld-i386/tlsgd1.s: Likewise. * ld-i386/tlsld1.dd: Likewise. * ld-i386/tlsld1.s: Likewise. * ld-x86-64/tlsgd1.dd: Likewise. * ld-x86-64/tlsgd1.s: Likewise. * ld-x86-64/tlsld1.dd: Likewise. * ld-x86-64/tlsld1.s: Likewise. --- bfd/ChangeLog | 11 +++++++++++ bfd/elf32-i386.c | 29 +++++++++++++++++++++++++---- bfd/elf64-x86-64.c | 34 ++++++++++++++++++++++++++++------ ld/testsuite/ChangeLog | 15 +++++++++++++++ ld/testsuite/ld-i386/i386.exp | 6 ++++++ ld/testsuite/ld-i386/tlsgd1.dd | 14 ++++++++++++++ ld/testsuite/ld-i386/tlsgd1.s | 12 ++++++++++++ ld/testsuite/ld-i386/tlsld1.dd | 15 +++++++++++++++ ld/testsuite/ld-i386/tlsld1.s | 12 ++++++++++++ ld/testsuite/ld-x86-64/tlsgd1.dd | 14 ++++++++++++++ ld/testsuite/ld-x86-64/tlsgd1.s | 15 +++++++++++++++ ld/testsuite/ld-x86-64/tlsld1.dd | 13 +++++++++++++ ld/testsuite/ld-x86-64/tlsld1.s | 12 ++++++++++++ ld/testsuite/ld-x86-64/x86-64.exp | 6 ++++++ 14 files changed, 198 insertions(+), 10 deletions(-) create mode 100644 ld/testsuite/ld-i386/tlsgd1.dd create mode 100644 ld/testsuite/ld-i386/tlsgd1.s create mode 100644 ld/testsuite/ld-i386/tlsld1.dd create mode 100644 ld/testsuite/ld-i386/tlsld1.s create mode 100644 ld/testsuite/ld-x86-64/tlsgd1.dd create mode 100644 ld/testsuite/ld-x86-64/tlsgd1.s create mode 100644 ld/testsuite/ld-x86-64/tlsld1.dd create mode 100644 ld/testsuite/ld-x86-64/tlsld1.s diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 33e7871137..5f5d291c7f 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,14 @@ +2007-08-14 H.J. Lu + + PR ld/4918 + * elf32-i386.c (elf_i386_relocate_section): Allow R_386_PC32 + on ___tls_get_addr for GD->LE/LD->LE transitions when not + building shared library. + + * elf64-x86-64.c (elf64_x86_64_relocate_section): Allow + R_X86_64_PC32 on __tls_get_addr for GD->LE/LD->LE transitions + when not building shared library. + 2007-08-14 Jan Kratochvil * elfcode.h (NAME(_bfd_elf,bfd_from_remote_memory)): LOADBASE is now diff --git a/bfd/elf32-i386.c b/bfd/elf32-i386.c index c50e98d92b..0e50e9ea1c 100644 --- a/bfd/elf32-i386.c +++ b/bfd/elf32-i386.c @@ -2652,6 +2652,8 @@ elf_i386_relocate_section (bfd *output_bfd, { unsigned int val, type; bfd_vma roff; + unsigned long tls_r_symndx; + struct elf_link_hash_entry *tls_h; /* GD->LE transition. */ BFD_ASSERT (rel->r_offset >= 2); @@ -2662,7 +2664,16 @@ elf_i386_relocate_section (bfd *output_bfd, contents + rel->r_offset + 4) == 0xe8); BFD_ASSERT (rel + 1 < relend); - BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); + tls_r_symndx = ELF32_R_SYM (rel[1].r_info); + BFD_ASSERT (tls_r_symndx >= symtab_hdr->sh_info); + tls_h = sym_hashes[tls_r_symndx - symtab_hdr->sh_info]; + BFD_ASSERT (tls_h != NULL + && tls_h->root.root.string != NULL + && strcmp (tls_h->root.root.string, + "___tls_get_addr") == 0); + BFD_ASSERT ((! info->shared + && ELF32_R_TYPE (rel[1].r_info) == R_386_PC32) + || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); roff = rel->r_offset + 5; val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); @@ -2707,7 +2718,7 @@ elf_i386_relocate_section (bfd *output_bfd, } bfd_put_32 (output_bfd, tpoff (info, relocation), contents + roff); - /* Skip R_386_PLT32. */ + /* Skip R_386_PC32/R_386_PLT32. */ rel++; continue; } @@ -3191,6 +3202,8 @@ elf_i386_relocate_section (bfd *output_bfd, if (! info->shared) { unsigned int val; + unsigned long tls_r_symndx; + struct elf_link_hash_entry *tls_h; /* LD->LE transition: Ensure it is: @@ -3206,10 +3219,18 @@ elf_i386_relocate_section (bfd *output_bfd, BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4) == 0xe8); BFD_ASSERT (rel + 1 < relend); - BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); + tls_r_symndx = ELF32_R_SYM (rel[1].r_info); + BFD_ASSERT (tls_r_symndx >= symtab_hdr->sh_info); + tls_h = sym_hashes[tls_r_symndx - symtab_hdr->sh_info]; + BFD_ASSERT (tls_h != NULL + && tls_h->root.root.string != NULL + && strcmp (tls_h->root.root.string, + "___tls_get_addr") == 0); + BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 + || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); memcpy (contents + rel->r_offset - 2, "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); - /* Skip R_386_PLT32. */ + /* Skip R_386_PC32/R_386_PLT32. */ rel++; continue; } diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c index 389c89a961..6d2d59d6b7 100644 --- a/bfd/elf64-x86-64.c +++ b/bfd/elf64-x86-64.c @@ -2527,10 +2527,12 @@ elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info, unsigned int i; static unsigned char tlsgd[8] = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 }; + unsigned long tls_r_symndx; + struct elf_link_hash_entry *tls_h; /* GD->LE transition. .byte 0x66; leaq foo@tlsgd(%rip), %rdi - .word 0x6666; rex64; call __tls_get_addr@plt + .word 0x6666; rex64; call __tls_get_addr Change it into: movq %fs:0, %rax leaq foo@tpoff(%rax), %rax */ @@ -2545,13 +2547,22 @@ elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info, contents + rel->r_offset + 4 + i) == tlsgd[i+4]); BFD_ASSERT (rel + 1 < relend); - BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); + tls_r_symndx = ELF64_R_SYM (rel[1].r_info); + BFD_ASSERT (tls_r_symndx >= symtab_hdr->sh_info); + tls_h = sym_hashes[tls_r_symndx - symtab_hdr->sh_info]; + BFD_ASSERT (tls_h != NULL + && tls_h->root.root.string != NULL + && strcmp (tls_h->root.root.string, + "__tls_get_addr") == 0); + BFD_ASSERT ((! info->shared + && ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PC32) + || ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); memcpy (contents + rel->r_offset - 4, "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", 16); bfd_put_32 (output_bfd, tpoff (info, relocation), contents + rel->r_offset + 8); - /* Skip R_X86_64_PLT32. */ + /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ rel++; continue; } @@ -2919,9 +2930,12 @@ elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info, case R_X86_64_TLSLD: if (! info->shared) { + unsigned long tls_r_symndx; + struct elf_link_hash_entry *tls_h; + /* LD->LE transition: Ensure it is: - leaq foo@tlsld(%rip), %rdi; call __tls_get_addr@plt. + leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. We change it into: .word 0x6666; .byte 0x66; movl %fs:0, %rax. */ BFD_ASSERT (rel->r_offset >= 3); @@ -2935,10 +2949,18 @@ elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info, BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4) == 0xe8); BFD_ASSERT (rel + 1 < relend); - BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); + tls_r_symndx = ELF64_R_SYM (rel[1].r_info); + BFD_ASSERT (tls_r_symndx >= symtab_hdr->sh_info); + tls_h = sym_hashes[tls_r_symndx - symtab_hdr->sh_info]; + BFD_ASSERT (tls_h != NULL + && tls_h->root.root.string != NULL + && strcmp (tls_h->root.root.string, + "__tls_get_addr") == 0); + BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PC32 + || ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); memcpy (contents + rel->r_offset - 3, "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); - /* Skip R_X86_64_PLT32. */ + /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ rel++; continue; } diff --git a/ld/testsuite/ChangeLog b/ld/testsuite/ChangeLog index 5e0310f09b..b9931cee94 100644 --- a/ld/testsuite/ChangeLog +++ b/ld/testsuite/ChangeLog @@ -1,3 +1,18 @@ +2007-08-14 H.J. Lu + + PR ld/4918 + * ld-i386/i386.exp (i386tests): Add tlsgd1 and tlsld1 tests. + * ld-x86-64/x86-64.exp (x86_64tests): Likewise. + + * ld-i386/tlsgd1.dd: New file. + * ld-i386/tlsgd1.s: Likewise. + * ld-i386/tlsld1.dd: Likewise. + * ld-i386/tlsld1.s: Likewise. + * ld-x86-64/tlsgd1.dd: Likewise. + * ld-x86-64/tlsgd1.s: Likewise. + * ld-x86-64/tlsld1.dd: Likewise. + * ld-x86-64/tlsld1.s: Likewise. + 2007-08-13 Richard Sandiford * ld-mips-elf/vxworks-forced-local-1.d, diff --git a/ld/testsuite/ld-i386/i386.exp b/ld/testsuite/ld-i386/i386.exp index 6b98519720..2c7c14b317 100644 --- a/ld/testsuite/ld-i386/i386.exp +++ b/ld/testsuite/ld-i386/i386.exp @@ -109,6 +109,12 @@ set i386tests { {emit-relocs.s} {{readelf --relocs emit-relocs.d}} "emit-relocs.so"} {"-z combreloc relocation sections" "-shared -melf_i386 -z combreloc" "--32" {combreloc.s} {{readelf -r combreloc.d}} "combreloc.so"} + {"TLS GD->LE transition" "-melf_i386" + "--32" {tlsgd1.s} + {{objdump -dwr tlsgd1.dd}} "tlsgd1"} + {"TLS LD->LE transition" "-melf_i386" + "--32" {tlsld1.s} + {{objdump -dwr tlsld1.dd}} "tlsld1"} } run_ld_link_tests $i386tests diff --git a/ld/testsuite/ld-i386/tlsgd1.dd b/ld/testsuite/ld-i386/tlsgd1.dd new file mode 100644 index 0000000000..54d741651f --- /dev/null +++ b/ld/testsuite/ld-i386/tlsgd1.dd @@ -0,0 +1,14 @@ +#source: tlsgd1.s +#as: --32 +#ld: -melf_i386 tmpdir/tlsgd1 +#objdump: -drw +#target: i?86-*-linux* + +.*: +file format .* + +Disassembly of section .text: + +[a-f0-9]+ <_start>: +[ ]*[a-f0-9]+: 65 a1 00 00 00 00 mov %gs:0x0,%eax +[ ]*[a-f0-9]+: 81 e8 04 00 00 00 sub \$0x4,%eax +#pass diff --git a/ld/testsuite/ld-i386/tlsgd1.s b/ld/testsuite/ld-i386/tlsgd1.s new file mode 100644 index 0000000000..2b3ed0e8be --- /dev/null +++ b/ld/testsuite/ld-i386/tlsgd1.s @@ -0,0 +1,12 @@ + .text + .globl _start +_start: + leal foo@TLSGD(,%ebx,1), %eax + call ___tls_get_addr + .globl foo + .section .tdata,"awT",@progbits + .align 4 + .type foo, @object + .size foo, 4 +foo: + .long 100 diff --git a/ld/testsuite/ld-i386/tlsld1.dd b/ld/testsuite/ld-i386/tlsld1.dd new file mode 100644 index 0000000000..782eb5afdb --- /dev/null +++ b/ld/testsuite/ld-i386/tlsld1.dd @@ -0,0 +1,15 @@ +#source: tlsld1.s +#as: --32 +#ld: -melf_i386 tmpdir/tlsld1 +#objdump: -drw +#target: i?86-*-linux* + +.*: +file format .* + +Disassembly of section .text: + +[a-f0-9]+ <_start>: +[ ]*[a-f0-9]+: 65 a1 00 00 00 00 mov %gs:0x0,%eax +[ ]*[a-f0-9]+: 90 nop +[ ]*[a-f0-9]+: 8d 74 26 00 lea 0x0\(%esi\),%esi +#pass diff --git a/ld/testsuite/ld-i386/tlsld1.s b/ld/testsuite/ld-i386/tlsld1.s new file mode 100644 index 0000000000..5d57e3545a --- /dev/null +++ b/ld/testsuite/ld-i386/tlsld1.s @@ -0,0 +1,12 @@ + .text + .globl _start +_start: + leal foo@TLSLDM(%ebx), %eax + call ___tls_get_addr + .globl foo + .section .tdata,"awT",@progbits + .align 4 + .type foo, @object + .size foo, 4 +foo: + .long 100 diff --git a/ld/testsuite/ld-x86-64/tlsgd1.dd b/ld/testsuite/ld-x86-64/tlsgd1.dd new file mode 100644 index 0000000000..b4f3c99036 --- /dev/null +++ b/ld/testsuite/ld-x86-64/tlsgd1.dd @@ -0,0 +1,14 @@ +#source: tlsgd1.s +#as: --64 +#ld: -melf_x86_64 tmpdir/tlsgd1 +#objdump: -drw +#target: x86_64-*-linux* + +.*: +file format .* + +Disassembly of section .text: + +[a-f0-9]+ <_start>: +[ ]*[a-f0-9]+: 64 48 8b 04 25 00 00 00 00 mov %fs:0x0,%rax +[ ]*[a-f0-9]+: 48 8d 80 fc ff ff ff lea -0x4\(%rax\),%rax +#pass diff --git a/ld/testsuite/ld-x86-64/tlsgd1.s b/ld/testsuite/ld-x86-64/tlsgd1.s new file mode 100644 index 0000000000..e5f52ed87b --- /dev/null +++ b/ld/testsuite/ld-x86-64/tlsgd1.s @@ -0,0 +1,15 @@ + .text + .globl _start +_start: + .byte 0x66 + leaq foo@TLSGD(%rip), %rdi + .word 0x6666 + rex64 + call __tls_get_addr + .globl foo + .section .tdata,"awT",@progbits + .align 4 + .type foo, @object + .size foo, 4 +foo: + .long 100 diff --git a/ld/testsuite/ld-x86-64/tlsld1.dd b/ld/testsuite/ld-x86-64/tlsld1.dd new file mode 100644 index 0000000000..c10f7ff625 --- /dev/null +++ b/ld/testsuite/ld-x86-64/tlsld1.dd @@ -0,0 +1,13 @@ +#source: tlsld1.s +#as: --64 +#ld: -melf_x86_64 tmpdir/tlsld1 +#objdump: -drw +#target: x86_64-*-linux* + +.*: +file format .* + +Disassembly of section .text: + +[a-f0-9]+ <_start>: +[ ]*[a-f0-9]+: 66 66 66 64 48 8b 04 25 00 00 00 00 mov %fs:0x0,%rax +#pass diff --git a/ld/testsuite/ld-x86-64/tlsld1.s b/ld/testsuite/ld-x86-64/tlsld1.s new file mode 100644 index 0000000000..6dcdd699aa --- /dev/null +++ b/ld/testsuite/ld-x86-64/tlsld1.s @@ -0,0 +1,12 @@ + .text + .globl _start +_start: + leaq foo@TLSLD(%rip), %rdi + call __tls_get_addr + .globl foo + .section .tdata,"awT",@progbits + .align 4 + .type foo, @object + .size foo, 4 +foo: + .long 100 diff --git a/ld/testsuite/ld-x86-64/x86-64.exp b/ld/testsuite/ld-x86-64/x86-64.exp index 75c527306e..3d251292a7 100644 --- a/ld/testsuite/ld-x86-64/x86-64.exp +++ b/ld/testsuite/ld-x86-64/x86-64.exp @@ -66,6 +66,12 @@ set x86_64tests { {"TLS in debug sections" "-melf_x86_64" "--64" {tlsg.s} {{objdump -sj.debug_foobar tlsg.sd}} "tlsg"} + {"TLS GD->LE transition" "-melf_x86_64" + "--64" {tlsgd1.s} + {{objdump -dwr tlsgd1.dd}} "tlsgd1"} + {"TLS LD->LE transition" "-melf_x86_64" + "--64" {tlsld1.s} + {{objdump -dwr tlsld1.dd}} "tlsld1"} } run_ld_link_tests $x86_64tests -- 2.11.0