From ee4bf8d232ce4f0eb1a4c9343e28d7e351d8a08f Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Thu, 17 Aug 2006 08:21:06 +0000 Subject: bfd/ * elf64-ppc.c (create_linkage_sections): Align .glink to 8 bytes. (ppc64_elf_build_stubs): Use new lazy linking stub. ld/testsuite/ * ld-powerpc/tlsexe.d: Update for lazy link stub change. * ld-powerpc/tlsexe.r: Likewise. * ld-powerpc/tlsexetoc.d: Likewise. * ld-powerpc/tlsexetoc.r: Likewise. * ld-powerpc/tlsso.d: Likewise. * ld-powerpc/tlstocso.d: Likewise. --- bfd/ChangeLog | 5 ++++ bfd/elf64-ppc.c | 89 +++++++++++++++++++++++++-------------------------------- 2 files changed, 44 insertions(+), 50 deletions(-) (limited to 'bfd') diff --git a/bfd/ChangeLog b/bfd/ChangeLog index ca26d60..affb063 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,10 @@ 2006-08-17 Alan Modra + * elf64-ppc.c (create_linkage_sections): Align .glink to 8 bytes. + (ppc64_elf_build_stubs): Use new lazy linking stub. + +2006-08-17 Alan Modra + * elf64-ppc.c (ppc64_elf_size_stubs): Ignore non-code sections. 2006-08-16 H.J. Lu diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c index 67e2713..de2dd79 100644 --- a/bfd/elf64-ppc.c +++ b/bfd/elf64-ppc.c @@ -135,30 +135,29 @@ static bfd_vma opd_entry_value #define BCTR 0x4e800420 /* bctr */ +#define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */ #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */ #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */ #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */ -/* glink call stub instructions. We enter with the index in R0, and the - address of glink entry in CTR. From that, we can calculate PLT0. */ +/* glink call stub instructions. We enter with the index in R0. */ #define GLINK_CALL_STUB_SIZE (16*4) -#define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */ -#define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */ -#define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */ -#define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */ -#define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */ -#define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */ -#define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */ - /* sub %r12,%r12,%r11 */ -#define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */ -#define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */ - /* ld %r11,xxx@l(%r12) */ -#define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */ - /* ld %r2,8(%r12) */ - /* mtctr %r11 */ - /* ld %r11,16(%r12) */ - /* bctr */ + /* 0: */ + /* .quad plt0-1f */ + /* __glink: */ +#define MFLR_R12 0x7d8802a6 /* mflr %12 */ +#define BCL_20_31 0x429f0005 /* bcl 20,31,1f */ + /* 1: */ +#define MFLR_R11 0x7d6802a6 /* mflr %11 */ +#define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */ +#define MTLR_R12 0x7d8803a6 /* mtlr %12 */ +#define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */ + /* ld %11,0(%12) */ + /* ld %2,8(%12) */ + /* mtctr %11 */ + /* ld %11,16(%12) */ + /* bctr */ /* Pad with this. */ #define NOP 0x60000000 @@ -3728,7 +3727,7 @@ create_linkage_sections (bfd *dynobj, struct bfd_link_info *info) htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink", flags); if (htab->glink == NULL - || ! bfd_set_section_alignment (dynobj, htab->glink, 2)) + || ! bfd_set_section_alignment (dynobj, htab->glink, 3)) return FALSE; /* Create branch lookup table for plt_branch stubs. */ @@ -9458,18 +9457,6 @@ ppc64_elf_build_stubs (bfd_boolean emit_stub_syms, bfd_vma plt0; /* Build the .glink plt call stub. */ - plt0 = (htab->plt->output_section->vma - + htab->plt->output_offset - - (htab->glink->output_section->vma - + htab->glink->output_offset - + GLINK_CALL_STUB_SIZE)); - if (plt0 + 0x80008000 > 0xffffffff) - { - (*_bfd_error_handler) (_(".glink and .plt too far apart")); - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - if (htab->emit_stub_syms) { struct elf_link_hash_entry *h; @@ -9480,7 +9467,7 @@ ppc64_elf_build_stubs (bfd_boolean emit_stub_syms, { h->root.type = bfd_link_hash_defined; h->root.u.def.section = htab->glink; - h->root.u.def.value = 0; + h->root.u.def.value = 8; h->ref_regular = 1; h->def_regular = 1; h->ref_regular_nonweak = 1; @@ -9489,29 +9476,26 @@ ppc64_elf_build_stubs (bfd_boolean emit_stub_syms, } } p = htab->glink->contents; - bfd_put_32 (htab->glink->owner, MFCTR_R12, p); - p += 4; - bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p); - p += 4; - bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p); - p += 4; - bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p); - p += 4; - bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p); - p += 4; - bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p); + plt0 = (htab->plt->output_section->vma + + htab->plt->output_offset + - (htab->glink->output_section->vma + + htab->glink->output_offset + + 16)); + bfd_put_64 (htab->glink->owner, plt0, p); + p += 8; + bfd_put_32 (htab->glink->owner, MFLR_R12, p); p += 4; - bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p); + bfd_put_32 (htab->glink->owner, BCL_20_31, p); p += 4; - bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p); + bfd_put_32 (htab->glink->owner, MFLR_R11, p); p += 4; - bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p); + bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p); p += 4; - bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p); + bfd_put_32 (htab->glink->owner, MTLR_R12, p); p += 4; - bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p); + bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p); p += 4; - bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p); + bfd_put_32 (htab->glink->owner, LD_R11_0R12, p); p += 4; bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p); p += 4; @@ -9521,6 +9505,11 @@ ppc64_elf_build_stubs (bfd_boolean emit_stub_syms, p += 4; bfd_put_32 (htab->glink->owner, BCTR, p); p += 4; + while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE) + { + bfd_put_32 (htab->glink->owner, NOP, p); + p += 4; + } /* Build the .glink lazy link call stubs. */ indx = 0; @@ -9539,7 +9528,7 @@ ppc64_elf_build_stubs (bfd_boolean emit_stub_syms, p += 4; } bfd_put_32 (htab->glink->owner, - B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p); + B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p); indx++; p += 4; } -- cgit v1.1