X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=bfd%2Felf64-s390.c;h=aeb1cedf63e76942c0b531782482bdc856dc81b0;hb=90b6238f06197c2abff953ab5920ae5b6d39f97f;hp=1c3769976e65b20b84bf1bf454f66ba0057de32a;hpb=9b8b325a1f4cdaf235e7d803849dde6ededec865;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/elf64-s390.c b/bfd/elf64-s390.c index 1c3769976e..aeb1cedf63 100644 --- a/bfd/elf64-s390.c +++ b/bfd/elf64-s390.c @@ -1,5 +1,5 @@ /* IBM S/390-specific support for 64-bit ELF - Copyright (C) 2000-2015 Free Software Foundation, Inc. + Copyright (C) 2000-2018 Free Software Foundation, Inc. Contributed Martin Schwidefsky (schwidefsky@de.ibm.com). This file is part of BFD, the Binary File Descriptor library. @@ -25,6 +25,8 @@ #include "libbfd.h" #include "elf-bfd.h" #include "elf/s390.h" +#include "elf-s390.h" +#include /* In case we're on a 32-bit machine, construct a 64-bit "-1" value from smaller values. Start with zero, widen, *then* decrement. */ @@ -54,65 +56,65 @@ static reloc_howto_type elf_howto_table[] = 0, /* dst_mask */ FALSE), /* pcrel_offset */ - HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), - HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, - bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), - HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), - HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), + HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), + HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, + bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), + HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), + HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), + bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), + bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), + bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), - HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), - HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), + HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), + HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE), - HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE), - HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, + HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE), - HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE), - HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), - HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), - HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), - HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), - HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, + HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), + HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), + HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), + HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), + HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), + bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), - HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, + HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE), - HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), + HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), + bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), + bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), + bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), - HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), + HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), - HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE), HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), - HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, + HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), @@ -120,11 +122,11 @@ static reloc_howto_type elf_howto_table[] = bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE), HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE), - HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, + HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), - HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), - HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE), HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), @@ -133,7 +135,7 @@ static reloc_howto_type elf_howto_table[] = HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */ - HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE), HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), @@ -144,12 +146,12 @@ static reloc_howto_type elf_howto_table[] = HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE), EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */ - HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE), HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE), EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */ - HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE), EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */ HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, @@ -160,23 +162,23 @@ static reloc_howto_type elf_howto_table[] = bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE), HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE), - HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, + HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), - HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, + HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE), - HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE), - HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, + HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE), + HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE), - HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE), - HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, + HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE), + HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE), }; @@ -337,10 +339,10 @@ elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, && strcasecmp (elf_howto_table[i].name, r_name) == 0) return &elf_howto_table[i]; - if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0) - return &elf64_s390_vtinherit_howto; - if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0) - return &elf64_s390_vtentry_howto; + if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0) + return &elf64_s390_vtinherit_howto; + if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0) + return &elf64_s390_vtentry_howto; return NULL; } @@ -367,8 +369,9 @@ elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, default: if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) { - (*_bfd_error_handler) (_("%B: invalid relocation type %d"), - abfd, (int) r_type); + /* xgettext:c-format */ + _bfd_error_handler (_("%pB: unsupported relocation type %#x"), + abfd, r_type); r_type = R_390_NONE; } cache_ptr->howto = &elf_howto_table[r_type]; @@ -492,18 +495,18 @@ elf_s390_is_local_label_name (bfd *abfd, const char *name) The GOT holds the address in the PLT to be executed. The loader then gets: - 24(15) = Pointer to the structure describing the object. - 28(15) = Offset in symbol table + 48(15) = Pointer to the structure describing the object. + 56(15) = Offset in symbol table The loader must then find the module where the function is and insert the address in the GOT. PLT1: LARL 1,@GOTENT # 6 bytes Load address of GOT entry in r1 - LG 1,0(1) # 6 bytes Load address from GOT in r1 - BCR 15,1 # 2 bytes Jump to address - RET1: BASR 1,0 # 2 bytes Return from GOT 1st time - LGF 1,12(1) # 6 bytes Load offset in symbl table in r1 - BRCL 15,-x # 6 bytes Jump to start of PLT - .long ? # 4 bytes offset into .rela.plt + LG 1,0(1) # 6 bytes Load address from GOT in r1 + BCR 15,1 # 2 bytes Jump to address + RET1: BASR 1,0 # 2 bytes Return from GOT 1st time + LGF 1,12(1) # 6 bytes Load offset in symbl table in r1 + BRCL 15,-x # 6 bytes Jump to start of PLT + .long ? # 4 bytes offset into .rela.plt Total = 32 bytes per PLT entry Fixup at offset 2: relative address to GOT entry @@ -518,13 +521,13 @@ elf_s390_is_local_label_name (bfd *abfd, const char *name) static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] = { - 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ - 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */ - 0x07, 0xf1, /* br %r1 */ - 0x0d, 0x10, /* basr %r1,%r0 */ - 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */ - 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */ - 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */ + 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ + 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */ + 0x07, 0xf1, /* br %r1 */ + 0x0d, 0x10, /* basr %r1,%r0 */ + 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */ + 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */ + 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */ }; /* The first PLT entry pushes the offset into the symbol table @@ -544,14 +547,14 @@ static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] = static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] = { - 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */ - 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ - 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */ - 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */ - 0x07, 0xf1, /* br %r1 */ - 0x07, 0x00, /* nopr %r0 */ - 0x07, 0x00, /* nopr %r0 */ - 0x07, 0x00 /* nopr %r0 */ + 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */ + 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ + 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */ + 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */ + 0x07, 0xf1, /* br %r1 */ + 0x07, 0x00, /* nopr %r0 */ + 0x07, 0x00, /* nopr %r0 */ + 0x07, 0x00 /* nopr %r0 */ }; @@ -649,8 +652,6 @@ struct elf_s390_link_hash_table struct elf_link_hash_table elf; /* Short-cuts to get to dynamic linker sections. */ - asection *sdynbss; - asection *srelbss; asection *irelifunc; union { @@ -660,13 +661,16 @@ struct elf_s390_link_hash_table /* Small local sym cache. */ struct sym_cache sym_cache; + + /* Options passed from the linker. */ + struct s390_elf_params *params; }; /* Get the s390 ELF linker hash table from a link_info structure. */ -#define elf_s390_hash_table(p) \ - (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ - == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL) +#define elf_s390_hash_table(p) \ + (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ + == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL) #define ELF64 1 #include "elf-s390-common.c" @@ -728,63 +732,6 @@ elf_s390_link_hash_table_create (bfd *abfd) return &ret->elf.root; } -/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up - shortcuts to them in our hash table. */ - -static bfd_boolean -create_got_section (bfd *dynobj, - struct bfd_link_info *info) -{ - struct elf_s390_link_hash_table *htab; - - if (! _bfd_elf_create_got_section (dynobj, info)) - return FALSE; - - htab = elf_s390_hash_table (info); - if (htab == NULL) - return FALSE; - - htab->elf.sgot = bfd_get_linker_section (dynobj, ".got"); - htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); - htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got"); - if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot) - abort (); - return TRUE; -} - -/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and - .rela.bss sections in DYNOBJ, and set up shortcuts to them in our - hash table. */ - -static bfd_boolean -elf_s390_create_dynamic_sections (bfd *dynobj, - struct bfd_link_info *info) -{ - struct elf_s390_link_hash_table *htab; - - htab = elf_s390_hash_table (info); - if (htab == NULL) - return FALSE; - - if (!htab->elf.sgot && !create_got_section (dynobj, info)) - return FALSE; - - if (!_bfd_elf_create_dynamic_sections (dynobj, info)) - return FALSE; - - htab->elf.splt = bfd_get_linker_section (dynobj, ".plt"); - htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt"); - htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); - if (!bfd_link_pic (info)) - htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); - - if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss - || (!bfd_link_pic (info) && !htab->srelbss)) - abort (); - - return TRUE; -} - /* Copy the extra info we tack onto an elf_link_hash_entry. */ static void @@ -842,7 +789,8 @@ elf_s390_copy_indirect_symbol (struct bfd_link_info *info, /* If called to transfer flags for a weakdef during processing of elf_adjust_dynamic_symbol, don't copy non_got_ref. We clear it ourselves for ELIMINATE_COPY_RELOCS. */ - dir->ref_dynamic |= ind->ref_dynamic; + if (dir->versioned != versioned_hidden) + dir->ref_dynamic |= ind->ref_dynamic; dir->ref_regular |= ind->ref_regular; dir->ref_regular_nonweak |= ind->ref_regular_nonweak; dir->needs_plt |= ind->needs_plt; @@ -915,7 +863,7 @@ elf_s390_check_relocs (bfd *abfd, for (rel = relocs; rel < rel_end; rel++) { unsigned int r_type; - unsigned long r_symndx; + unsigned int r_symndx; struct elf_link_hash_entry *h; Elf_Internal_Sym *isym; @@ -923,9 +871,9 @@ elf_s390_check_relocs (bfd *abfd, if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) { - (*_bfd_error_handler) (_("%B: bad symbol index: %d"), - abfd, - r_symndx); + /* xgettext:c-format */ + _bfd_error_handler (_("%pB: bad symbol index: %d"), + abfd, r_symndx); return FALSE; } @@ -964,10 +912,6 @@ elf_s390_check_relocs (bfd *abfd, while (h->root.type == bfd_link_hash_indirect || h->root.type == bfd_link_hash_warning) h = (struct elf_link_hash_entry *) h->root.u.i.link; - - /* PR15323, ref flags aren't set for references in the same - object. */ - h->root.non_ir_ref = 1; } /* Create got section and local_got_refcounts array if they @@ -1014,7 +958,7 @@ elf_s390_check_relocs (bfd *abfd, { if (htab->elf.dynobj == NULL) htab->elf.dynobj = abfd; - if (!create_got_section (htab->elf.dynobj, info)) + if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) return FALSE; } } @@ -1040,9 +984,6 @@ elf_s390_check_relocs (bfd *abfd, switch (r_type) { - case R_390_GOTOFF16: - case R_390_GOTOFF32: - case R_390_GOTOFF64: case R_390_GOTPC: case R_390_GOTPCDBL: /* These relocs do not need a GOT slot. They just load the @@ -1050,6 +991,12 @@ elf_s390_check_relocs (bfd *abfd, the GOT. Since the GOT pointer has been set up above we are done. */ break; + case R_390_GOTOFF16: + case R_390_GOTOFF32: + case R_390_GOTOFF64: + if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular) + break; + /* Fall through. */ case R_390_PLT12DBL: case R_390_PLT16DBL: @@ -1161,8 +1108,9 @@ elf_s390_check_relocs (bfd *abfd, { if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) { - (*_bfd_error_handler) - (_("%B: `%s' accessed both as normal and thread local symbol"), + _bfd_error_handler + /* xgettext:c-format */ + (_("%pB: `%s' accessed both as normal and thread local symbol"), abfd, h->root.root.string); return FALSE; } @@ -1205,7 +1153,7 @@ elf_s390_check_relocs (bfd *abfd, case R_390_PC32: case R_390_PC32DBL: case R_390_PC64: - if (h != NULL) + if (h != NULL && bfd_link_executable (info)) { /* If this reloc is in a read-only section, we might need a copy reloc. We can't check reliably at this @@ -1381,179 +1329,6 @@ elf_s390_gc_mark_hook (asection *sec, return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); } -/* Update the got entry reference counts for the section being removed. */ - -static bfd_boolean -elf_s390_gc_sweep_hook (bfd *abfd, - struct bfd_link_info *info, - asection *sec, - const Elf_Internal_Rela *relocs) -{ - struct elf_s390_link_hash_table *htab; - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - bfd_signed_vma *local_got_refcounts; - const Elf_Internal_Rela *rel, *relend; - - if (bfd_link_relocatable (info)) - return TRUE; - - htab = elf_s390_hash_table (info); - if (htab == NULL) - return FALSE; - - elf_section_data (sec)->local_dynrel = NULL; - - symtab_hdr = &elf_symtab_hdr (abfd); - sym_hashes = elf_sym_hashes (abfd); - local_got_refcounts = elf_local_got_refcounts (abfd); - - relend = relocs + sec->reloc_count; - for (rel = relocs; rel < relend; rel++) - { - unsigned long r_symndx; - unsigned int r_type; - struct elf_link_hash_entry *h = NULL; - - r_symndx = ELF64_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - struct elf_s390_link_hash_entry *eh; - struct elf_dyn_relocs **pp; - struct elf_dyn_relocs *p; - - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - while (h->root.type == bfd_link_hash_indirect - || h->root.type == bfd_link_hash_warning) - h = (struct elf_link_hash_entry *) h->root.u.i.link; - eh = (struct elf_s390_link_hash_entry *) h; - - for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) - if (p->sec == sec) - { - /* Everything must go for SEC. */ - *pp = p->next; - break; - } - } - else - { - Elf_Internal_Sym *isym; - - /* A local symbol. */ - isym = bfd_sym_from_r_symndx (&htab->sym_cache, - abfd, r_symndx); - if (isym == NULL) - return FALSE; - - if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) - { - struct plt_entry *plt = elf_s390_local_plt (abfd); - if (plt[r_symndx].plt.refcount > 0) - plt[r_symndx].plt.refcount--; - } - } - - r_type = ELF64_R_TYPE (rel->r_info); - r_type = elf_s390_tls_transition (info, r_type, h != NULL); - switch (r_type) - { - case R_390_TLS_LDM64: - if (htab->tls_ldm_got.refcount > 0) - htab->tls_ldm_got.refcount -= 1; - break; - - case R_390_TLS_GD64: - case R_390_TLS_IE64: - case R_390_TLS_GOTIE12: - case R_390_TLS_GOTIE20: - case R_390_TLS_GOTIE64: - case R_390_TLS_IEENT: - case R_390_GOT12: - case R_390_GOT16: - case R_390_GOT20: - case R_390_GOT32: - case R_390_GOT64: - case R_390_GOTOFF16: - case R_390_GOTOFF32: - case R_390_GOTOFF64: - case R_390_GOTPC: - case R_390_GOTPCDBL: - case R_390_GOTENT: - if (h != NULL) - { - if (h->got.refcount > 0) - h->got.refcount -= 1; - } - else if (local_got_refcounts != NULL) - { - if (local_got_refcounts[r_symndx] > 0) - local_got_refcounts[r_symndx] -= 1; - } - break; - - case R_390_8: - case R_390_12: - case R_390_16: - case R_390_20: - case R_390_32: - case R_390_64: - case R_390_PC16: - case R_390_PC12DBL: - case R_390_PC16DBL: - case R_390_PC24DBL: - case R_390_PC32: - case R_390_PC32DBL: - case R_390_PC64: - if (bfd_link_pic (info)) - break; - /* Fall through */ - - case R_390_PLT12DBL: - case R_390_PLT16DBL: - case R_390_PLT24DBL: - case R_390_PLT32: - case R_390_PLT32DBL: - case R_390_PLT64: - case R_390_PLTOFF16: - case R_390_PLTOFF32: - case R_390_PLTOFF64: - if (h != NULL) - { - if (h->plt.refcount > 0) - h->plt.refcount -= 1; - } - break; - - case R_390_GOTPLT12: - case R_390_GOTPLT16: - case R_390_GOTPLT20: - case R_390_GOTPLT32: - case R_390_GOTPLT64: - case R_390_GOTPLTENT: - if (h != NULL) - { - if (h->plt.refcount > 0) - { - ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; - h->plt.refcount -= 1; - } - } - else if (local_got_refcounts != NULL) - { - if (local_got_refcounts[r_symndx] > 0) - local_got_refcounts[r_symndx] -= 1; - } - break; - - default: - break; - } - } - - return TRUE; -} - /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT entry but we found we will not create any. Called when we find we will not have any PLT for this symbol, by for example @@ -1576,6 +1351,23 @@ elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h) h->gotplt_refcount = -1; } +/* Find dynamic relocs for H that apply to read-only sections. */ + +static asection * +readonly_dynrelocs (struct elf_link_hash_entry *h) +{ + struct elf_dyn_relocs *p; + + for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) + { + asection *s = p->sec->output_section; + + if (s != NULL && (s->flags & SEC_READONLY) != 0) + return p->sec; + } + return NULL; +} + /* Adjust a symbol defined by a dynamic object and referenced by a regular object. The current definition is in some section of the dynamic object, but we're not including those sections. We have to @@ -1587,11 +1379,51 @@ elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, struct elf_link_hash_entry *h) { struct elf_s390_link_hash_table *htab; - asection *s; + asection *s, *srel; /* STT_GNU_IFUNC symbol must go through PLT. */ if (s390_is_ifunc_symbol_p (h)) - return TRUE; + { + /* All local STT_GNU_IFUNC references must be treated as local + calls via local PLT. */ + if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h)) + { + bfd_size_type pc_count = 0, count = 0; + struct elf_dyn_relocs **pp; + struct elf_s390_link_hash_entry *eh; + struct elf_dyn_relocs *p; + + eh = (struct elf_s390_link_hash_entry *) h; + for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) + { + pc_count += p->pc_count; + p->count -= p->pc_count; + p->pc_count = 0; + count += p->count; + if (p->count == 0) + *pp = p->next; + else + pp = &p->next; + } + + if (pc_count || count) + { + h->needs_plt = 1; + h->non_got_ref = 1; + if (h->plt.refcount <= 0) + h->plt.refcount = 1; + else + h->plt.refcount += 1; + } + } + + if (h->plt.refcount <= 0) + { + h->plt.offset = (bfd_vma) -1; + h->needs_plt = 0; + } + return TRUE; + } /* If this is a function, put it in the procedure linkage table. We will fill in the contents of the procedure linkage table later @@ -1601,8 +1433,7 @@ elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, { if (h->plt.refcount <= 0 || SYMBOL_CALLS_LOCAL (info, h) - || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT - && h->root.type == bfd_link_hash_undefweak)) + || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) { /* This case can occur if we saw a PLT32 reloc in an input file, but the symbol was never referred to by a dynamic @@ -1627,14 +1458,14 @@ elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, /* If this is a weak symbol, and there is a real definition, the processor independent code will have arranged for us to see the real definition first, and we can just use the same value. */ - if (h->u.weakdef != NULL) + if (h->is_weakalias) { - BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined - || h->u.weakdef->root.type == bfd_link_hash_defweak); - h->root.u.def.section = h->u.weakdef->root.u.def.section; - h->root.u.def.value = h->u.weakdef->root.u.def.value; + struct elf_link_hash_entry *def = weakdef (h); + BFD_ASSERT (def->root.type == bfd_link_hash_defined); + h->root.u.def.section = def->root.u.def.section; + h->root.u.def.value = def->root.u.def.value; if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) - h->non_got_ref = h->u.weakdef->non_got_ref; + h->non_got_ref = def->non_got_ref; return TRUE; } @@ -1660,26 +1491,12 @@ elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, return TRUE; } - if (ELIMINATE_COPY_RELOCS) + /* If we don't find any dynamic relocs in read-only sections, then + we'll be keeping the dynamic relocs and avoiding the copy reloc. */ + if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h)) { - struct elf_s390_link_hash_entry * eh; - struct elf_dyn_relocs *p; - - eh = (struct elf_s390_link_hash_entry *) h; - for (p = eh->dyn_relocs; p != NULL; p = p->next) - { - s = p->sec->output_section; - if (s != NULL && (s->flags & SEC_READONLY) != 0) - break; - } - - /* If we didn't find any dynamic relocs in read-only sections, then - we'll be keeping the dynamic relocs and avoiding the copy reloc. */ - if (p == NULL) - { - h->non_got_ref = 0; - return TRUE; - } + h->non_got_ref = 0; + return TRUE; } /* We must allocate the symbol in our .dynbss section, which will @@ -1699,14 +1516,22 @@ elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, /* We must generate a R_390_COPY reloc to tell the dynamic linker to copy the initial value out of the dynamic object and into the runtime process image. */ + if ((h->root.u.def.section->flags & SEC_READONLY) != 0) + { + s = htab->elf.sdynrelro; + srel = htab->elf.sreldynrelro; + } + else + { + s = htab->elf.sdynbss; + srel = htab->elf.srelbss; + } if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) { - htab->srelbss->size += sizeof (Elf64_External_Rela); + srel->size += sizeof (Elf64_External_Rela); h->needs_copy = 1; } - s = htab->sdynbss; - return _bfd_elf_adjust_dynamic_copy (info, h, s); } @@ -1733,8 +1558,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it here if it is defined and referenced in a non-shared object. */ if (s390_is_ifunc_symbol_p (h) && h->def_regular) - return s390_elf_allocate_ifunc_dyn_relocs (info, h, - &eh->dyn_relocs); + return s390_elf_allocate_ifunc_dyn_relocs (info, h); else if (htab->elf.dynamic_sections_created && h->plt.refcount > 0) { @@ -1844,8 +1668,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, htab->elf.srelgot->size += sizeof (Elf64_External_Rela); else if (tls_type == GOT_TLS_GD) htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela); - else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT - || h->root.type != bfd_link_hash_undefweak) + else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h) && (bfd_link_pic (info) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) htab->elf.srelgot->size += sizeof (Elf64_External_Rela); @@ -1884,7 +1707,8 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak) { - if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) + if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT + || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) eh->dyn_relocs = NULL; /* Make sure undefined weak symbols are output as a dynamic @@ -1940,28 +1764,29 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, return TRUE; } -/* Find any dynamic relocs that apply to read-only sections. */ +/* Set DF_TEXTREL if we find any dynamic relocs that apply to + read-only sections. */ static bfd_boolean -readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) +maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p) { - struct elf_s390_link_hash_entry *eh; - struct elf_dyn_relocs *p; + asection *sec; - eh = (struct elf_s390_link_hash_entry *) h; - for (p = eh->dyn_relocs; p != NULL; p = p->next) - { - asection *s = p->sec->output_section; + if (h->root.type == bfd_link_hash_indirect) + return TRUE; - if (s != NULL && (s->flags & SEC_READONLY) != 0) - { - struct bfd_link_info *info = (struct bfd_link_info *) inf; + sec = readonly_dynrelocs (h); + if (sec != NULL) + { + struct bfd_link_info *info = (struct bfd_link_info *) info_p; - info->flags |= DF_TEXTREL; + info->flags |= DF_TEXTREL; + info->callbacks->minfo + (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"), + sec->owner, h->root.root.string, sec); - /* Not an error, just cut short the traversal. */ - return FALSE; - } + /* Not an error, just cut short the traversal. */ + return FALSE; } return TRUE; } @@ -2105,7 +1930,8 @@ elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, if (s == htab->elf.splt || s == htab->elf.sgot || s == htab->elf.sgotplt - || s == htab->sdynbss + || s == htab->elf.sdynbss + || s == htab->elf.sdynrelro || s == htab->elf.iplt || s == htab->elf.igotplt || s == htab->irelifunc) @@ -2192,8 +2018,7 @@ elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, /* If any dynamic relocs apply to a read-only section, then we need a DT_TEXTREL entry. */ if ((info->flags & DF_TEXTREL) == 0) - elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, - info); + elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); if ((info->flags & DF_TEXTREL) != 0) { @@ -2245,11 +2070,12 @@ invalid_tls_insn (bfd *input_bfd, reloc_howto_type *howto; howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); - (*_bfd_error_handler) - (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"), + _bfd_error_handler + /* xgettext:c-format */ + (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"), input_bfd, input_section, - (long) rel->r_offset, + (uint64_t) rel->r_offset, howto->name); bfd_set_error (bfd_error_bad_value); } @@ -2299,6 +2125,7 @@ elf_s390_relocate_section (bfd *output_bfd, bfd_reloc_status_type r; int tls_type; asection *base_got = htab->elf.sgot; + bfd_boolean resolved_to_zero; r_type = ELF64_R_TYPE (rel->r_info); if (r_type == (int) R_390_GNU_VTINHERIT @@ -2394,6 +2221,9 @@ elf_s390_relocate_section (bfd *output_bfd, if (bfd_link_relocatable (info)) continue; + resolved_to_zero = (h != NULL + && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); + switch (r_type) { case R_390_GOTPLT12: @@ -2431,7 +2261,7 @@ elf_s390_relocate_section (bfd *output_bfd, PLT_ENTRY_SIZE; /* Offset in GOT is PLT index plus GOT headers(3) - times 4, addr & GOT addr. */ + times 8, addr & GOT addr. */ relocation = (plt_index + 3) * GOT_ENTRY_SIZE; if (r_type == R_390_GOTPLTENT) relocation += htab->elf.sgot->output_section->vma; @@ -2481,8 +2311,7 @@ elf_s390_relocate_section (bfd *output_bfd, h) || (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h)) - || (ELF_ST_VISIBILITY (h->other) - && h->root.type == bfd_link_hash_undefweak)) + || resolved_to_zero) { /* This is actually a static link, or it is a -Bsymbolic link and the symbol is defined @@ -2601,6 +2430,18 @@ elf_s390_relocate_section (bfd *output_bfd, /* Relocation is relative to the start of the global offset table. */ + if (h != NULL + && s390_is_ifunc_symbol_p (h) + && h->def_regular + && !bfd_link_executable (info)) + { + relocation = (htab->elf.iplt->output_section->vma + + htab->elf.iplt->output_offset + + h->plt.offset + - htab->elf.sgot->output_section->vma); + goto do_relocation; + } + /* Note that sgot->output_offset is not involved in this calculation. We always want the start of .got. If we defined _GLOBAL_OFFSET_TABLE in a different way, as is @@ -2678,10 +2519,6 @@ elf_s390_relocate_section (bfd *output_bfd, unresolved_reloc = FALSE; break; - case R_390_8: - case R_390_16: - case R_390_32: - case R_390_64: case R_390_PC16: case R_390_PC12DBL: case R_390_PC16DBL: @@ -2689,15 +2526,47 @@ elf_s390_relocate_section (bfd *output_bfd, case R_390_PC32: case R_390_PC32DBL: case R_390_PC64: + if (h != NULL + && bfd_link_pie (info) + && !h->def_regular) + { + _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined " + "in shared library and accessed " + "from executable " + "(rebuild file with -fPIC ?)"), + input_bfd, h->root.root.string); + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + /* The target of these relocs are instruction operands + residing in read-only sections. We cannot emit a runtime + reloc for it. */ + if (h != NULL + && s390_is_ifunc_symbol_p (h) + && h->def_regular + && bfd_link_pic (info)) + { + relocation = (htab->elf.iplt->output_section->vma + + htab->elf.iplt->output_offset + + h->plt.offset); + goto do_relocation; + } + /* Fall through. */ + + case R_390_8: + case R_390_16: + case R_390_32: + case R_390_64: if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular) { - if (!bfd_link_pic (info) || !h->non_got_ref) + if (!bfd_link_pic (info)) { - /* For a non-shared object STT_GNU_IFUNC symbol must - go through PLT. */ + /* For a non-shared object the symbol will not + change. Hence we can write the address of the + target IPLT slot now. */ relocation = (htab->elf.iplt->output_section->vma + htab->elf.iplt->output_offset + h ->plt.offset); @@ -2756,7 +2625,8 @@ elf_s390_relocate_section (bfd *output_bfd, if ((bfd_link_pic (info) && (h == NULL - || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + && !resolved_to_zero) || h->root.type != bfd_link_hash_undefweak) && ((r_type != R_390_PC16 && r_type != R_390_PC12DBL @@ -2973,7 +2843,7 @@ elf_s390_relocate_section (bfd *output_bfd, { if (indx == 0) { - BFD_ASSERT (! unresolved_reloc); + BFD_ASSERT (! unresolved_reloc); bfd_put_64 (output_bfd, relocation - dtpoff_base (info), htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); @@ -3153,8 +3023,10 @@ elf_s390_relocate_section (bfd *output_bfd, insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); if (insn1 != 0x0004) - invalid_tls_insn (input_bfd, input_section, rel); - ry = 0; + { + invalid_tls_insn (input_bfd, input_section, rel); + return FALSE; + } if ((insn0 & 0xff00f000) == 0xe3000000) /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ ry = (insn0 & 0x000f0000); @@ -3168,7 +3040,10 @@ elf_s390_relocate_section (bfd *output_bfd, /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ ry = (insn0 & 0x0000f000) << 4; else - invalid_tls_insn (input_bfd, input_section, rel); + { + invalid_tls_insn (input_bfd, input_section, rel); + return FALSE; + } insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; insn1 = 0x000d; bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); @@ -3182,7 +3057,10 @@ elf_s390_relocate_section (bfd *output_bfd, insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); if ((insn0 & 0xffff0000) != 0xc0e50000) - invalid_tls_insn (input_bfd, input_section, rel); + { + invalid_tls_insn (input_bfd, input_section, rel); + return FALSE; + } if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) { /* GD->LE transition. @@ -3209,7 +3087,10 @@ elf_s390_relocate_section (bfd *output_bfd, insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); if ((insn0 & 0xffff0000) != 0xc0e50000) - invalid_tls_insn (input_bfd, input_section, rel); + { + invalid_tls_insn (input_bfd, input_section, rel); + return FALSE; + } /* LD->LE transition. brasl %r14,__tls_get_addr@plt -> brcl 0,. */ insn0 = 0xc0040000; @@ -3232,11 +3113,13 @@ elf_s390_relocate_section (bfd *output_bfd, && h->def_dynamic) && _bfd_elf_section_offset (output_bfd, info, input_section, rel->r_offset) != (bfd_vma) -1) - (*_bfd_error_handler) - (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), + _bfd_error_handler + /* xgettext:c-format */ + (_("%pB(%pA+%#" PRIx64 "): " + "unresolvable %s relocation against symbol `%s'"), input_bfd, input_section, - (long) rel->r_offset, + (uint64_t) rel->r_offset, howto->name, h->root.root.string); @@ -3283,20 +3166,16 @@ elf_s390_relocate_section (bfd *output_bfd, } if (r == bfd_reloc_overflow) - { - - if (! ((*info->callbacks->reloc_overflow) - (info, (h ? &h->root : NULL), name, howto->name, - (bfd_vma) 0, input_bfd, input_section, - rel->r_offset))) - return FALSE; - } + (*info->callbacks->reloc_overflow) + (info, (h ? &h->root : NULL), name, howto->name, + (bfd_vma) 0, input_bfd, input_section, rel->r_offset); else { - (*_bfd_error_handler) - (_("%B(%A+0x%lx): reloc against `%s': error %d"), + _bfd_error_handler + /* xgettext:c-format */ + (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), input_bfd, input_section, - (long) rel->r_offset, name, (int) r); + (uint64_t) rel->r_offset, name, (int) r); return FALSE; } } @@ -3416,17 +3295,16 @@ elf_s390_finish_dynamic_symbol (bfd *output_bfd, /* This symbol has an entry in the procedure linkage table. Set it up. */ - if (s390_is_ifunc_symbol_p (h)) + if (s390_is_ifunc_symbol_p (h) && h->def_regular) { - /* If we can resolve the IFUNC symbol locally we generate an - IRELATIVE reloc. */ - elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset, - eh->ifunc_resolver_address + - eh->ifunc_resolver_section->output_offset + - eh->ifunc_resolver_section->output_section->vma); - ; - /* Fallthrough. Handling of explicit GOT slots of IFUNC - symbols is below. */ + elf_s390_finish_ifunc_symbol (output_bfd, info, h, + htab, h->plt.offset, + eh->ifunc_resolver_address + + eh->ifunc_resolver_section->output_offset + + eh->ifunc_resolver_section->output_section->vma); + + /* Do not return yet. Handling of explicit GOT slots of + IFUNC symbols is below. */ } else { @@ -3535,15 +3413,18 @@ elf_s390_finish_dynamic_symbol (bfd *output_bfd, } } else if (bfd_link_pic (info) - && SYMBOL_REFERENCES_LOCAL (info, h)) + && SYMBOL_REFERENCES_LOCAL (info, h)) { + if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) + return TRUE; + /* If this is a static link, or it is a -Bsymbolic link and the symbol is defined locally or was forced to be local because of a version file, we just want to emit a RELATIVE reloc. The entry in the global offset table will already have been initialized in the relocate_section function. */ - if (!h->def_regular) + if (!(h->def_regular || ELF_COMMON_DEF_P (h))) return FALSE; BFD_ASSERT((h->got.offset & 1) != 0); rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); @@ -3554,7 +3435,7 @@ elf_s390_finish_dynamic_symbol (bfd *output_bfd, else { BFD_ASSERT((h->got.offset & 1) == 0); -do_glob_dat: + do_glob_dat: bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset); rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); rela.r_addend = 0; @@ -3568,6 +3449,7 @@ do_glob_dat: if (h->needs_copy) { Elf_Internal_Rela rela; + asection *s; bfd_byte *loc; /* This symbols needs a copy reloc. Set it up. */ @@ -3575,7 +3457,7 @@ do_glob_dat: if (h->dynindx == -1 || (h->root.type != bfd_link_hash_defined && h->root.type != bfd_link_hash_defweak) - || htab->srelbss == NULL) + || htab->elf.srelbss == NULL) abort (); rela.r_offset = (h->root.u.def.value @@ -3583,8 +3465,11 @@ do_glob_dat: + h->root.u.def.section->output_offset); rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); rela.r_addend = 0; - loc = htab->srelbss->contents; - loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); + if (h->root.u.def.section == htab->elf.sdynrelro) + s = htab->elf.sreldynrelro; + else + s = htab->elf.srelbss; + loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela); bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); } @@ -3605,6 +3490,23 @@ elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, const asection *rel_sec ATTRIBUTE_UNUSED, const Elf_Internal_Rela *rela) { + bfd *abfd = info->output_bfd; + const struct elf_backend_data *bed = get_elf_backend_data (abfd); + struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); + unsigned long r_symndx = ELF64_R_SYM (rela->r_info); + Elf_Internal_Sym sym; + + if (htab->elf.dynsym == NULL + || !bed->s->swap_symbol_in (abfd, + (htab->elf.dynsym->contents + + r_symndx * bed->s->sizeof_sym), + 0, &sym)) + abort (); + + /* Check relocation against STT_GNU_IFUNC symbol. */ + if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) + return reloc_class_ifunc; + switch ((int) ELF64_R_TYPE (rela->r_info)) { case R_390_RELATIVE: @@ -3659,16 +3561,19 @@ elf_s390_finish_dynamic_sections (bfd *output_bfd, continue; case DT_PLTGOT: - dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma; + s = htab->elf.sgotplt; + dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; break; case DT_JMPREL: - dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; + s = htab->elf.srelplt; + dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; break; case DT_PLTRELSZ: - s = htab->elf.srelplt->output_section; - dyn.d_un.d_val = s->size; + dyn.d_un.d_val = htab->elf.srelplt->size; + if (htab->elf.irelplt) + dyn.d_un.d_val += htab->elf.irelplt->size; break; case DT_RELASZ: @@ -3679,8 +3584,9 @@ elf_s390_finish_dynamic_sections (bfd *output_bfd, linker script arranges for .rela.plt to follow all other relocation sections, we don't have to worry about changing the DT_RELA entry. */ - s = htab->elf.srelplt->output_section; - dyn.d_un.d_val -= s->size; + dyn.d_un.d_val -= htab->elf.srelplt->size; + if (htab->elf.irelplt) + dyn.d_un.d_val -= htab->elf.irelplt->size; break; } @@ -3695,9 +3601,10 @@ elf_s390_finish_dynamic_sections (bfd *output_bfd, PLT_FIRST_ENTRY_SIZE); /* Fixup relative address to start of GOT */ bfd_put_32 (output_bfd, - (htab->elf.sgotplt->output_section->vma + - htab->elf.sgotplt->output_offset - - htab->elf.splt->output_section->vma - 6)/2, + (htab->elf.sgotplt->output_section->vma + + htab->elf.sgotplt->output_offset + - htab->elf.splt->output_section->vma + - htab->elf.splt->output_offset - 6)/2, htab->elf.splt->contents + 8); } if (elf_section_data (htab->elf.splt->output_section) != NULL) @@ -3717,7 +3624,7 @@ elf_s390_finish_dynamic_sections (bfd *output_bfd, /* One entry for shared object struct ptr. */ bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8); /* One entry for _dl_runtime_resolve. */ - bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 12); + bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 16); } elf_section_data (htab->elf.sgot->output_section) @@ -3733,6 +3640,9 @@ elf_s390_finish_dynamic_sections (bfd *output_bfd, symtab_hdr = &elf_symtab_hdr (ibfd); + if (!is_s390_elf (ibfd)) + continue; + local_plt = elf_s390_local_plt (ibfd); if (local_plt != NULL) for (i = 0; i < symtab_hdr->sh_info; i++) @@ -3757,7 +3667,120 @@ elf_s390_finish_dynamic_sections (bfd *output_bfd, return TRUE; } + +/* Support for core dump NOTE sections. */ + +static bfd_boolean +elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) +{ + int offset; + size_t size; + + switch (note->descsz) + { + default: + return FALSE; + case 336: /* sizeof(struct elf_prstatus) on s390x */ + /* pr_cursig */ + elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); + + /* pr_pid */ + elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32); + + /* pr_reg */ + offset = 112; + size = 216; + break; + } + + /* Make a ".reg/999" section. */ + return _bfd_elfcore_make_pseudosection (abfd, ".reg", + size, note->descpos + offset); +} + +static bfd_boolean +elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) +{ + switch (note->descsz) + { + default: + return FALSE; + + case 136: /* sizeof(struct elf_prpsinfo) on s390x */ + elf_tdata (abfd)->core->pid + = bfd_get_32 (abfd, note->descdata + 24); + elf_tdata (abfd)->core->program + = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); + elf_tdata (abfd)->core->command + = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); + } + + /* Note that for some reason, a spurious space is tacked + onto the end of the args in some (at least one anyway) + implementations, so strip it off if it exists. */ + + { + char *command = elf_tdata (abfd)->core->command; + int n = strlen (command); + + if (0 < n && command[n - 1] == ' ') + command[n - 1] = '\0'; + } + + return TRUE; +} + +static char * +elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz, + int note_type, ...) +{ + va_list ap; + + switch (note_type) + { + default: + return NULL; + + case NT_PRPSINFO: + { + char data[136] = { 0 }; + const char *fname, *psargs; + + va_start (ap, note_type); + fname = va_arg (ap, const char *); + psargs = va_arg (ap, const char *); + va_end (ap); + + strncpy (data + 40, fname, 16); + strncpy (data + 56, psargs, 80); + return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, + &data, sizeof (data)); + } + + case NT_PRSTATUS: + { + char data[336] = { 0 }; + long pid; + int cursig; + const void *gregs; + + va_start (ap, note_type); + pid = va_arg (ap, long); + cursig = va_arg (ap, int); + gregs = va_arg (ap, const void *); + va_end (ap); + + bfd_put_16 (abfd, cursig, data + 12); + bfd_put_32 (abfd, pid, data + 32); + memcpy (data + 112, gregs, 216); + return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, + &data, sizeof (data)); + } + } + /* NOTREACHED */ +} + /* Return address for Ith PLT stub in section PLT, for relocation REL or (bfd_vma) -1 if it should not be included. */ @@ -3772,17 +3795,89 @@ elf_s390_plt_sym_val (bfd_vma i, const asection *plt, object file when linking. */ static bfd_boolean -elf64_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd) +elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) +{ + if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd)) + return TRUE; + + return elf_s390_merge_obj_attributes (ibfd, info); +} + +/* We may add a PT_S390_PGSTE program header. */ + +static int +elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) +{ + struct elf_s390_link_hash_table *htab; + + if (info) + { + htab = elf_s390_hash_table (info); + if (htab) + return htab->params->pgste; + } + return 0; +} + + +/* Add the PT_S390_PGSTE program header. */ + +static bfd_boolean +elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info) { - if (!is_s390_elf (ibfd) || !is_s390_elf (obfd)) + struct elf_s390_link_hash_table *htab; + struct elf_segment_map *m, *pm = NULL; + + if (!abfd || !info) + return TRUE; + + htab = elf_s390_hash_table (info); + if (!htab || !htab->params->pgste) + return TRUE; + + /* If there is already a PT_S390_PGSTE header, avoid adding + another. */ + m = elf_seg_map (abfd); + while (m && m->p_type != PT_S390_PGSTE) + { + pm = m; + m = m->next; + } + + if (m) return TRUE; - if (!elf_s390_merge_obj_attributes (ibfd, obfd)) + m = (struct elf_segment_map *) + bfd_zalloc (abfd, sizeof (struct elf_segment_map)); + if (m == NULL) return FALSE; + m->p_type = PT_S390_PGSTE; + m->count = 0; + m->next = NULL; + if (pm) + pm->next = m; + + return TRUE; +} + +bfd_boolean +bfd_elf_s390_set_options (struct bfd_link_info *info, + struct s390_elf_params *params) +{ + struct elf_s390_link_hash_table *htab; + + if (info) + { + htab = elf_s390_hash_table (info); + if (htab) + htab->params = params; + } return TRUE; } + /* Why was the hash table entry size definition changed from ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and this is the only reason for the s390_elf64_size_info structure. */ @@ -3834,6 +3929,7 @@ const struct elf_size_info s390_elf64_size_info = #define elf_backend_plt_readonly 1 #define elf_backend_want_plt_sym 0 #define elf_backend_got_header_size 24 +#define elf_backend_want_dynrelro 1 #define elf_backend_rela_normal 1 #define elf_info_to_howto elf_s390_info_to_howto @@ -3841,41 +3937,30 @@ const struct elf_size_info s390_elf64_size_info = #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup -#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup +#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol #define elf_backend_check_relocs elf_s390_check_relocs #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol -#define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections +#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook -#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook #define elf_backend_reloc_type_class elf_s390_reloc_type_class #define elf_backend_relocate_section elf_s390_relocate_section #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections #define elf_backend_init_index_section _bfd_elf_init_1_index_section +#define elf_backend_grok_prstatus elf_s390_grok_prstatus +#define elf_backend_grok_psinfo elf_s390_grok_psinfo +#define elf_backend_write_core_note elf_s390_write_core_note #define elf_backend_plt_sym_val elf_s390_plt_sym_val -#define elf_backend_add_symbol_hook elf_s390_add_symbol_hook -#define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p +#define elf_backend_add_symbol_hook elf_s390_add_symbol_hook +#define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p +#define elf_backend_additional_program_headers elf_s390_additional_program_headers +#define elf_backend_modify_segment_map elf_s390_modify_segment_map #define bfd_elf64_mkobject elf_s390_mkobject #define elf_backend_object_p elf_s390_object_p -/* Enable ELF64 archive functions. */ -#define bfd_elf64_archive_functions -extern bfd_boolean bfd_elf64_archive_slurp_armap (bfd *); -extern bfd_boolean bfd_elf64_archive_write_armap (bfd *, unsigned int, struct orl *, unsigned int, int); - -#define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table -#define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table -#define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname -#define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr -#define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr -#define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file -#define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index -#define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt -#define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp - #include "elf64-target.h"