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-rw-r--r--bfd/ChangeLog49
-rw-r--r--bfd/Makefile.am4
-rw-r--r--bfd/Makefile.in4
-rw-r--r--bfd/config.bfd4
-rwxr-xr-xbfd/configure5
-rw-r--r--bfd/configure.in5
-rw-r--r--bfd/elf32-sparc.c66
-rw-r--r--bfd/elfxx-sparc.c440
-rw-r--r--bfd/elfxx-sparc.h11
-rw-r--r--bfd/targets.c2
10 files changed, 534 insertions, 56 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 51157c0..322b77f 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,52 @@
+2006-04-05 Richard Sandiford <richard@codesourcery.com>
+ Daniel Jacobowitz <dan@codesourcery.com>
+
+ * config.bfd (sparc-*-vxworks*): New stanza.
+ * configure.in (bfd_elf32_sparc_vxworks_vec): New stanza.
+ (bfd_elf32_sparc_vec, bfd_elf64_sparc_vec): Add elf-vxworks.lo.
+ * configure: Regenerate.
+ * elf32-sparc.c: Include elf-vxworks.h.
+ (elf32_sparc_vxworks_link_hash_table_create: New.
+ (elf32_sparc_vxworks_final_write_processing): New.
+ (TARGET_BIG_SYM): Override for VxWorks.
+ (TARGET_BIG_NAME, ELF_MINPAGESIZE): Likewise.
+ (bfd_elf32_bfd_link_hash_table_create): Likewise.
+ (elf_backend_want_got_plt, elf_backend_plt_readonly): Likewise.
+ (elf_backend_got_header_size, elf_backend_add_symbol_hook): Likewise.
+ (elf_backend_link_output_symbol_hook): Likewise.
+ (elf_backend_emit_relocs): Likewise.
+ (elf_backend_final_write_processing, elf32_bed): Likewise.
+ * elfxx-sparc.c: Include libiberty.h and elf-vxworks.h.
+ (sparc_vxworks_exec_plt0_entry, sparc_vxworks_exec_plt_entry): New.
+ (sparc_vxworks_shared_plt0_entry, sparc_vxworks_shared_plt_entry): New.
+ (_bfd_sparc_elf_link_hash_table_create): Don't initialize
+ build_plt_entry here.
+ (create_got_section): Initialize sgotplt for VxWorks.
+ (_bfd_sparc_elf_create_dynamic_sections): Initialize build_plt_entry,
+ plt_header_size and plt_entry_size, with new VxWorks-specific settings.
+ Call elf_vxworks_create_dynamic_sections for VxWorks.
+ (allocate_dynrelocs): Use plt_header_size and plt_entry_size.
+ Allocate room for .got.plt and .rela.plt.unloaded entries on VxWorks.
+ (_bfd_sparc_elf_size_dynamic_sections): Don't allocate a nop in .plt
+ for VxWorks. Check for the .got.plt section.
+ (sparc_vxworks_build_plt_entry): New function.
+ (_bfd_sparc_elf_finish_dynamic_symbol): Add handling of VxWorks PLTs.
+ Don't make _GLOBAL_OFFSET_TABLE_ and _PROCEDURE_LINKAGE_TABLE_
+ absolute on VxWorks.
+ (sparc32_finish_dyn): Add special handling for DT_RELASZ
+ and DT_PLTGOT on VxWorks.
+ (sparc_vxworks_finish_exec_plt): New.
+ (sparc_vxworks_finish_shared_plt): New.
+ (_bfd_sparc_elf_finish_dynamic_sections): Call them.
+ Use plt_header_size and plt_entry_size.
+ * elfxx-sparc.h (_bfd_sparc_elf_link_hash_table): Add is_vxworks,
+ srelplt2, sgotplt, plt_header_size and plt_entry_size fields.
+ * Makefile.am (elfxx-sparc.lo): Depend on elf-vxworks.h.
+ (elf32-sparc.lo): Likewise.
+ * Makefile.in: Regenerate.
+ * targets.c (bfd_elf32_sparc_vxworks_vec): Declare.
+ (_bfd_target_vector): Add a pointer to it.
+
2006-03-30 Ben Elliston <bje@au.ibm.com>
PR ld/2267
diff --git a/bfd/Makefile.am b/bfd/Makefile.am
index a0d5edf..bf32fbd 100644
--- a/bfd/Makefile.am
+++ b/bfd/Makefile.am
@@ -1416,12 +1416,12 @@ elfxx-sparc.lo: elfxx-sparc.c $(INCDIR)/filenames.h \
$(INCDIR)/bfdlink.h $(INCDIR)/hashtab.h elf-bfd.h $(INCDIR)/elf/common.h \
$(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h $(INCDIR)/elf/sparc.h \
$(INCDIR)/elf/reloc-macros.h $(INCDIR)/opcode/sparc.h \
- elfxx-sparc.h
+ elfxx-sparc.h elf-vxworks.h
elf32-sparc.lo: elf32-sparc.c $(INCDIR)/filenames.h \
$(INCDIR)/bfdlink.h $(INCDIR)/hashtab.h elf-bfd.h $(INCDIR)/elf/common.h \
$(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h $(INCDIR)/elf/sparc.h \
$(INCDIR)/elf/reloc-macros.h $(INCDIR)/opcode/sparc.h \
- elfxx-sparc.h elf32-target.h
+ elfxx-sparc.h elf32-target.h elf-vxworks.h
elf32-v850.lo: elf32-v850.c $(INCDIR)/filenames.h $(INCDIR)/bfdlink.h \
$(INCDIR)/hashtab.h elf-bfd.h $(INCDIR)/elf/common.h \
$(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h $(INCDIR)/elf/v850.h \
diff --git a/bfd/Makefile.in b/bfd/Makefile.in
index 6b78333..0220d91 100644
--- a/bfd/Makefile.in
+++ b/bfd/Makefile.in
@@ -1983,12 +1983,12 @@ elfxx-sparc.lo: elfxx-sparc.c $(INCDIR)/filenames.h \
$(INCDIR)/bfdlink.h $(INCDIR)/hashtab.h elf-bfd.h $(INCDIR)/elf/common.h \
$(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h $(INCDIR)/elf/sparc.h \
$(INCDIR)/elf/reloc-macros.h $(INCDIR)/opcode/sparc.h \
- elfxx-sparc.h
+ elfxx-sparc.h elf-vxworks.h
elf32-sparc.lo: elf32-sparc.c $(INCDIR)/filenames.h \
$(INCDIR)/bfdlink.h $(INCDIR)/hashtab.h elf-bfd.h $(INCDIR)/elf/common.h \
$(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h $(INCDIR)/elf/sparc.h \
$(INCDIR)/elf/reloc-macros.h $(INCDIR)/opcode/sparc.h \
- elfxx-sparc.h elf32-target.h
+ elfxx-sparc.h elf32-target.h elf-vxworks.h
elf32-v850.lo: elf32-v850.c $(INCDIR)/filenames.h $(INCDIR)/bfdlink.h \
$(INCDIR)/hashtab.h elf-bfd.h $(INCDIR)/elf/common.h \
$(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h $(INCDIR)/elf/v850.h \
diff --git a/bfd/config.bfd b/bfd/config.bfd
index ccd0de8..4fd72c1 100644
--- a/bfd/config.bfd
+++ b/bfd/config.bfd
@@ -1284,6 +1284,10 @@ case "${targ}" in
sparc-*-sysv4*)
targ_defvec=bfd_elf32_sparc_vec
;;
+ sparc-*-vxworks*)
+ targ_defvec=bfd_elf32_sparc_vxworks_vec
+ targ_selvecs="bfd_elf32_sparc_vec sunos_big_vec"
+ ;;
sparc-*-netware*)
targ_defvec=bfd_elf32_sparc_vec
targ_selvecs="nlm32_sparc_vec sunos_big_vec"
diff --git a/bfd/configure b/bfd/configure
index 5ad2bc4..dd8f2d0 100755
--- a/bfd/configure
+++ b/bfd/configure
@@ -13159,7 +13159,8 @@ do
bfd_elf32_shlin_vec) tb="$tb elf32-sh.lo elf32.lo $elf coff-sh.lo cofflink.lo" ;;
bfd_elf32_shlnbsd_vec) tb="$tb elf32-sh.lo elf32.lo $elf coff-sh.lo cofflink.lo" ;;
bfd_elf32_shnbsd_vec) tb="$tb elf32-sh.lo elf32.lo $elf coff-sh.lo cofflink.lo" ;;
- bfd_elf32_sparc_vec) tb="$tb elf32-sparc.lo elfxx-sparc.lo elf32.lo $elf" ;;
+ bfd_elf32_sparc_vec) tb="$tb elf32-sparc.lo elfxx-sparc.lo elf-vxworks.lo elf32.lo $elf" ;;
+ bfd_elf32_sparc_vxworks_vec) tb="$tb elf32-sparc.lo elfxx-sparc.lo elf-vxworks.lo elf32.lo $elf" ;;
bfd_elf32_tradbigmips_vec) tb="$tb elf32-mips.lo elfxx-mips.lo elf-vxworks.lo elf32.lo $elf ecofflink.lo" ;;
bfd_elf32_tradlittlemips_vec) tb="$tb elf32-mips.lo elfxx-mips.lo elf-vxworks.lo elf32.lo $elf ecofflink.lo" ;;
bfd_elf32_us_cris_vec) tb="$tb elf32-cris.lo elf32.lo $elf" ;;
@@ -13190,7 +13191,7 @@ do
bfd_elf64_sh64blin_vec) tb="$tb elf64-sh64.lo elf64.lo $elf" target_size=64 ;;
bfd_elf64_sh64lnbsd_vec) tb="$tb elf64-sh64.lo elf64.lo $elf" target_size=64 ;;
bfd_elf64_sh64nbsd_vec) tb="$tb elf64-sh64.lo elf64.lo $elf" target_size=64 ;;
- bfd_elf64_sparc_vec) tb="$tb elf64-sparc.lo elfxx-sparc.lo elf64.lo $elf"; target_size=64 ;;
+ bfd_elf64_sparc_vec) tb="$tb elf64-sparc.lo elfxx-sparc.lo elf-vxworks.lo elf64.lo $elf"; target_size=64 ;;
bfd_elf64_tradbigmips_vec) tb="$tb elf64-mips.lo elf64.lo elfxx-mips.lo elf-vxworks.lo elf32.lo $elf ecofflink.lo"; target_size=64 ;;
bfd_elf64_tradlittlemips_vec) tb="$tb elf64-mips.lo elf64.lo elfxx-mips.lo elf-vxworks.lo elf32.lo $elf ecofflink.lo"; target_size=64 ;;
bfd_elf64_x86_64_vec) tb="$tb elf64-x86-64.lo elf64.lo $elf"; target_size=64 ;;
diff --git a/bfd/configure.in b/bfd/configure.in
index bc8dabb..37282b7 100644
--- a/bfd/configure.in
+++ b/bfd/configure.in
@@ -672,7 +672,8 @@ do
bfd_elf32_shlin_vec) tb="$tb elf32-sh.lo elf32.lo $elf coff-sh.lo cofflink.lo" ;;
bfd_elf32_shlnbsd_vec) tb="$tb elf32-sh.lo elf32.lo $elf coff-sh.lo cofflink.lo" ;;
bfd_elf32_shnbsd_vec) tb="$tb elf32-sh.lo elf32.lo $elf coff-sh.lo cofflink.lo" ;;
- bfd_elf32_sparc_vec) tb="$tb elf32-sparc.lo elfxx-sparc.lo elf32.lo $elf" ;;
+ bfd_elf32_sparc_vec) tb="$tb elf32-sparc.lo elfxx-sparc.lo elf-vxworks.lo elf32.lo $elf" ;;
+ bfd_elf32_sparc_vxworks_vec) tb="$tb elf32-sparc.lo elfxx-sparc.lo elf-vxworks.lo elf32.lo $elf" ;;
bfd_elf32_tradbigmips_vec) tb="$tb elf32-mips.lo elfxx-mips.lo elf-vxworks.lo elf32.lo $elf ecofflink.lo" ;;
bfd_elf32_tradlittlemips_vec) tb="$tb elf32-mips.lo elfxx-mips.lo elf-vxworks.lo elf32.lo $elf ecofflink.lo" ;;
bfd_elf32_us_cris_vec) tb="$tb elf32-cris.lo elf32.lo $elf" ;;
@@ -703,7 +704,7 @@ do
bfd_elf64_sh64blin_vec) tb="$tb elf64-sh64.lo elf64.lo $elf" target_size=64 ;;
bfd_elf64_sh64lnbsd_vec) tb="$tb elf64-sh64.lo elf64.lo $elf" target_size=64 ;;
bfd_elf64_sh64nbsd_vec) tb="$tb elf64-sh64.lo elf64.lo $elf" target_size=64 ;;
- bfd_elf64_sparc_vec) tb="$tb elf64-sparc.lo elfxx-sparc.lo elf64.lo $elf"; target_size=64 ;;
+ bfd_elf64_sparc_vec) tb="$tb elf64-sparc.lo elfxx-sparc.lo elf-vxworks.lo elf64.lo $elf"; target_size=64 ;;
bfd_elf64_tradbigmips_vec) tb="$tb elf64-mips.lo elf64.lo elfxx-mips.lo elf-vxworks.lo elf32.lo $elf ecofflink.lo"; target_size=64 ;;
bfd_elf64_tradlittlemips_vec) tb="$tb elf64-mips.lo elf64.lo elfxx-mips.lo elf-vxworks.lo elf32.lo $elf ecofflink.lo"; target_size=64 ;;
bfd_elf64_x86_64_vec) tb="$tb elf64-x86-64.lo elf64.lo $elf"; target_size=64 ;;
diff --git a/bfd/elf32-sparc.c b/bfd/elf32-sparc.c
index 031b303..3bfb38a 100644
--- a/bfd/elf32-sparc.c
+++ b/bfd/elf32-sparc.c
@@ -26,6 +26,7 @@
#include "elf/sparc.h"
#include "opcode/sparc.h"
#include "elfxx-sparc.h"
+#include "elf-vxworks.h"
/* Support for core dump NOTE sections. */
@@ -215,3 +216,68 @@ elf32_sparc_reloc_type_class (const Elf_Internal_Rela *rela)
#define elf_backend_rela_normal 1
#include "elf32-target.h"
+
+/* A wrapper around _bfd_sparc_elf_link_hash_table_create that identifies
+ the target system as VxWorks. */
+
+static struct bfd_link_hash_table *
+elf32_sparc_vxworks_link_hash_table_create (bfd *abfd)
+{
+ struct bfd_link_hash_table *ret;
+
+ ret = _bfd_sparc_elf_link_hash_table_create (abfd);
+ if (ret)
+ {
+ struct _bfd_sparc_elf_link_hash_table *htab;
+
+ htab = (struct _bfd_sparc_elf_link_hash_table *) ret;
+ htab->is_vxworks = 1;
+ }
+ return ret;
+}
+
+/* A final_write_processing hook that does both the SPARC- and VxWorks-
+ specific handling. */
+
+static void
+elf32_sparc_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
+{
+ elf32_sparc_final_write_processing (abfd, linker);
+ elf_vxworks_final_write_processing (abfd, linker);
+}
+
+#undef TARGET_BIG_SYM
+#define TARGET_BIG_SYM bfd_elf32_sparc_vxworks_vec
+#undef TARGET_BIG_NAME
+#define TARGET_BIG_NAME "elf32-sparc-vxworks"
+
+#undef ELF_MINPAGESIZE
+#define ELF_MINPAGESIZE 0x1000
+
+#undef bfd_elf32_bfd_link_hash_table_create
+#define bfd_elf32_bfd_link_hash_table_create \
+ elf32_sparc_vxworks_link_hash_table_create
+
+#undef elf_backend_want_got_plt
+#define elf_backend_want_got_plt 1
+#undef elf_backend_plt_readonly
+#define elf_backend_plt_readonly 1
+#undef elf_backend_got_header_size
+#define elf_backend_got_header_size 12
+#undef elf_backend_add_symbol_hook
+#define elf_backend_add_symbol_hook \
+ elf_vxworks_add_symbol_hook
+#undef elf_backend_link_output_symbol_hook
+#define elf_backend_link_output_symbol_hook \
+ elf_vxworks_link_output_symbol_hook
+#undef elf_backend_emit_relocs
+#define elf_backend_emit_relocs \
+ elf_vxworks_emit_relocs
+#undef elf_backend_final_write_processing
+#define elf_backend_final_write_processing \
+ elf32_sparc_vxworks_final_write_processing
+
+#undef elf32_bed
+#define elf32_bed sparc_elf_vxworks_bed
+
+#include "elf32-target.h"
diff --git a/bfd/elfxx-sparc.c b/bfd/elfxx-sparc.c
index cb5f7cb..ef7ff48 100644
--- a/bfd/elfxx-sparc.c
+++ b/bfd/elfxx-sparc.c
@@ -23,10 +23,12 @@
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
+#include "libiberty.h"
#include "elf-bfd.h"
#include "elf/sparc.h"
#include "opcode/sparc.h"
#include "elfxx-sparc.h"
+#include "elf-vxworks.h"
/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
#define MINUS_ONE (~ (bfd_vma) 0)
@@ -697,6 +699,50 @@ sparc64_plt_entry_build (bfd *output_bfd, asection *splt, bfd_vma offset,
return index - 4;
}
+/* The format of the first PLT entry in a VxWorks executable. */
+static const bfd_vma sparc_vxworks_exec_plt0_entry[] =
+ {
+ 0x05000000, /* sethi %hi(_GLOBAL_OFFSET_TABLE_+8), %g2 */
+ 0x8410a000, /* or %g2, %lo(_GLOBAL_OFFSET_TABLE_+8), %g2 */
+ 0xc4008000, /* ld [ %g2 ], %g2 */
+ 0x81c08000, /* jmp %g2 */
+ 0x01000000 /* nop */
+ };
+
+/* The format of subsequent PLT entries. */
+static const bfd_vma sparc_vxworks_exec_plt_entry[] =
+ {
+ 0x03000000, /* sethi %hi(_GLOBAL_OFFSET_TABLE_+f@got), %g1 */
+ 0x82106000, /* or %g1, %lo(_GLOBAL_OFFSET_TABLE_+f@got), %g1 */
+ 0xc2004000, /* ld [ %g1 ], %g1 */
+ 0x81c04000, /* jmp %g1 */
+ 0x01000000, /* nop */
+ 0x03000000, /* sethi %hi(f@pltindex), %g1 */
+ 0x10800000, /* b _PLT_resolve */
+ 0x82106000 /* or %g1, %lo(f@pltindex), %g1 */
+ };
+
+/* The format of the first PLT entry in a VxWorks shared object. */
+static const bfd_vma sparc_vxworks_shared_plt0_entry[] =
+ {
+ 0xc405e008, /* ld [ %l7 + 8 ], %g2 */
+ 0x81c08000, /* jmp %g2 */
+ 0x01000000 /* nop */
+ };
+
+/* The format of subsequent PLT entries. */
+static const bfd_vma sparc_vxworks_shared_plt_entry[] =
+ {
+ 0x03000000, /* sethi %hi(f@got), %g1 */
+ 0x82106000, /* or %g1, %lo(f@got), %g1 */
+ 0xc205c001, /* ld [ %l7 + %g1 ], %g1 */
+ 0x81c04000, /* jmp %g1 */
+ 0x01000000, /* nop */
+ 0x03000000, /* sethi %hi(f@pltindex), %g1 */
+ 0x10800000, /* b _PLT_resolve */
+ 0x82106000 /* or %g1, %lo(f@pltindex), %g1 */
+ };
+
#define SPARC_ELF_PUT_WORD(htab, bfd, val, ptr) \
htab->put_word(bfd, val, ptr)
@@ -781,7 +827,6 @@ _bfd_sparc_elf_link_hash_table_create (bfd *abfd)
ret->append_rela = sparc_elf_append_rela_64;
ret->r_info = sparc_elf_r_info_64;
ret->r_symndx = sparc_elf_r_symndx_64;
- ret->build_plt_entry = sparc64_plt_entry_build;
ret->dtpoff_reloc = R_SPARC_TLS_DTPOFF64;
ret->dtpmod_reloc = R_SPARC_TLS_DTPMOD64;
ret->tpoff_reloc = R_SPARC_TLS_TPOFF64;
@@ -798,7 +843,6 @@ _bfd_sparc_elf_link_hash_table_create (bfd *abfd)
ret->append_rela = sparc_elf_append_rela_32;
ret->r_info = sparc_elf_r_info_32;
ret->r_symndx = sparc_elf_r_symndx_32;
- ret->build_plt_entry = sparc32_plt_entry_build;
ret->dtpoff_reloc = R_SPARC_TLS_DTPOFF32;
ret->dtpmod_reloc = R_SPARC_TLS_DTPMOD32;
ret->tpoff_reloc = R_SPARC_TLS_TPOFF32;
@@ -846,6 +890,14 @@ create_got_section (bfd *dynobj, struct bfd_link_info *info)
|| ! bfd_set_section_alignment (dynobj, htab->srelgot,
htab->word_align_power))
return FALSE;
+
+ if (htab->is_vxworks)
+ {
+ htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
+ if (!htab->sgotplt)
+ return FALSE;
+ }
+
return TRUE;
}
@@ -872,6 +924,41 @@ _bfd_sparc_elf_create_dynamic_sections (bfd *dynobj,
if (!info->shared)
htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
+ if (htab->is_vxworks)
+ {
+ if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
+ return FALSE;
+ if (info->shared)
+ {
+ htab->plt_header_size
+ = 4 * ARRAY_SIZE (sparc_vxworks_shared_plt0_entry);
+ htab->plt_entry_size
+ = 4 * ARRAY_SIZE (sparc_vxworks_shared_plt_entry);
+ }
+ else
+ {
+ htab->plt_header_size
+ = 4 * ARRAY_SIZE (sparc_vxworks_exec_plt0_entry);
+ htab->plt_entry_size
+ = 4 * ARRAY_SIZE (sparc_vxworks_exec_plt_entry);
+ }
+ }
+ else
+ {
+ if (ABI_64_P (dynobj))
+ {
+ htab->build_plt_entry = sparc64_plt_entry_build;
+ htab->plt_header_size = PLT64_HEADER_SIZE;
+ htab->plt_entry_size = PLT64_ENTRY_SIZE;
+ }
+ else
+ {
+ htab->build_plt_entry = sparc32_plt_entry_build;
+ htab->plt_header_size = PLT32_HEADER_SIZE;
+ htab->plt_entry_size = PLT32_ENTRY_SIZE;
+ }
+ }
+
if (!htab->splt || !htab->srelplt || !htab->sdynbss
|| (!info->shared && !htab->srelbss))
abort ();
@@ -1807,10 +1894,15 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
{
asection *s = htab->splt;
- /* The first four entries in .plt is reserved. */
+ /* Allocate room for the header. */
if (s->size == 0)
- s->size = (SPARC_ELF_WORD_BYTES(htab) == 8 ?
- PLT64_HEADER_SIZE : PLT32_HEADER_SIZE);
+ {
+ s->size = htab->plt_header_size;
+
+ /* Allocate space for the .rela.plt.unloaded relocations. */
+ if (htab->is_vxworks && !info->shared)
+ htab->srelplt2->size = sizeof (Elf32_External_Rela) * 2;
+ }
/* The procedure linkage table size is bounded by the magnitude
of the offset we can describe in the entry. */
@@ -1847,11 +1939,20 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
}
/* Make room for this entry. */
- s->size += (SPARC_ELF_WORD_BYTES(htab) == 8 ?
- PLT64_ENTRY_SIZE : PLT32_ENTRY_SIZE);
+ s->size += htab->plt_entry_size;
/* We also need to make an entry in the .rela.plt section. */
htab->srelplt->size += SPARC_ELF_RELA_BYTES (htab);
+
+ if (htab->is_vxworks)
+ {
+ /* Allocate space for the .got.plt entry. */
+ htab->sgotplt->size += 4;
+
+ /* ...and for the .rela.plt.unloaded relocations. */
+ if (!info->shared)
+ htab->srelplt2->size += sizeof (Elf32_External_Rela) * 3;
+ }
}
else
{
@@ -2153,6 +2254,7 @@ _bfd_sparc_elf_size_dynamic_sections (bfd *output_bfd,
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
if (! ABI_64_P (output_bfd)
+ && !htab->is_vxworks
&& elf_hash_table (info)->dynamic_sections_created)
{
/* Make space for the trailing nop in .plt. */
@@ -2179,7 +2281,8 @@ _bfd_sparc_elf_size_dynamic_sections (bfd *output_bfd,
if (s == htab->splt
|| s == htab->sgot
- || s == htab->sdynbss)
+ || s == htab->sdynbss
+ || s == htab->sgotplt)
{
/* Strip this section if we don't need it; see the
comment below. */
@@ -3428,6 +3531,97 @@ _bfd_sparc_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
return TRUE;
}
+/* Build a VxWorks PLT entry. PLT_INDEX is the index of the PLT entry
+ and PLT_OFFSET is the byte offset from the start of .plt. GOT_OFFSET
+ is the offset of the associated .got.plt entry from
+ _GLOBAL_OFFSET_TABLE_. */
+
+static void
+sparc_vxworks_build_plt_entry (bfd *output_bfd, struct bfd_link_info *info,
+ bfd_vma plt_offset, bfd_vma plt_index,
+ bfd_vma got_offset)
+{
+ bfd_vma got_base;
+ const bfd_vma *plt_entry;
+ struct _bfd_sparc_elf_link_hash_table *htab;
+ bfd_byte *loc;
+ Elf_Internal_Rela rela;
+
+ htab = _bfd_sparc_elf_hash_table (info);
+ if (info->shared)
+ {
+ plt_entry = sparc_vxworks_shared_plt_entry;
+ got_base = 0;
+ }
+ else
+ {
+ plt_entry = sparc_vxworks_exec_plt_entry;
+ got_base = (htab->elf.hgot->root.u.def.value
+ + htab->elf.hgot->root.u.def.section->output_offset
+ + htab->elf.hgot->root.u.def.section->output_section->vma);
+ }
+
+ /* Fill in the entry in the procedure linkage table. */
+ bfd_put_32 (output_bfd, plt_entry[0] + ((got_base + got_offset) >> 10),
+ htab->splt->contents + plt_offset);
+ bfd_put_32 (output_bfd, plt_entry[1] + ((got_base + got_offset) & 0x3ff),
+ htab->splt->contents + plt_offset + 4);
+ bfd_put_32 (output_bfd, plt_entry[2],
+ htab->splt->contents + plt_offset + 8);
+ bfd_put_32 (output_bfd, plt_entry[3],
+ htab->splt->contents + plt_offset + 12);
+ bfd_put_32 (output_bfd, plt_entry[4],
+ htab->splt->contents + plt_offset + 16);
+ bfd_put_32 (output_bfd, plt_entry[5] + (plt_index >> 10),
+ htab->splt->contents + plt_offset + 20);
+ /* PC-relative displacement for a branch to the start of
+ the PLT section. */
+ bfd_put_32 (output_bfd, plt_entry[6] + (((-plt_offset - 24) >> 2)
+ & 0x003fffff),
+ htab->splt->contents + plt_offset + 24);
+ bfd_put_32 (output_bfd, plt_entry[7] + (plt_index & 0x3ff),
+ htab->splt->contents + plt_offset + 28);
+
+ /* Fill in the .got.plt entry, pointing initially at the
+ second half of the PLT entry. */
+ BFD_ASSERT (htab->sgotplt != NULL);
+ bfd_put_32 (output_bfd,
+ htab->splt->output_section->vma
+ + htab->splt->output_offset
+ + plt_offset + 20,
+ htab->sgotplt->contents + got_offset);
+
+ /* Add relocations to .rela.plt.unloaded. */
+ if (!info->shared)
+ {
+ loc = (htab->srelplt2->contents
+ + (2 + 3 * plt_index) * sizeof (Elf32_External_Rela));
+
+ /* Relocate the initial sethi. */
+ rela.r_offset = (htab->splt->output_section->vma
+ + htab->splt->output_offset
+ + plt_offset);
+ rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_HI22);
+ rela.r_addend = got_offset;
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ loc += sizeof (Elf32_External_Rela);
+
+ /* Likewise the following or. */
+ rela.r_offset += 4;
+ rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_LO10);
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ loc += sizeof (Elf32_External_Rela);
+
+ /* Relocate the .got.plt entry. */
+ rela.r_offset = (htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset
+ + got_offset);
+ rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_SPARC_32);
+ rela.r_addend = plt_offset + 20;
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ }
+}
+
/* Finish up dynamic symbol handling. We set the contents of various
dynamic sections here. */
@@ -3449,7 +3643,7 @@ _bfd_sparc_elf_finish_dynamic_symbol (bfd *output_bfd,
asection *srela;
Elf_Internal_Rela rela;
bfd_byte *loc;
- bfd_vma r_offset;
+ bfd_vma r_offset, got_offset;
int rela_index;
/* This symbol has an entry in the PLT. Set it up. */
@@ -3460,23 +3654,48 @@ _bfd_sparc_elf_finish_dynamic_symbol (bfd *output_bfd,
srela = htab->srelplt;
BFD_ASSERT (splt != NULL && srela != NULL);
- /* Fill in the entry in the procedure linkage table. */
- rela_index = SPARC_ELF_BUILD_PLT_ENTRY (htab, output_bfd, splt,
- h->plt.offset, splt->size,
- &r_offset);
-
/* Fill in the entry in the .rela.plt section. */
- rela.r_offset = r_offset
- + (splt->output_section->vma + splt->output_offset);
- if (! ABI_64_P (output_bfd)
- || h->plt.offset < (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE))
+ if (htab->is_vxworks)
{
+ /* Work out the index of this PLT entry. */
+ rela_index = ((h->plt.offset - htab->plt_header_size)
+ / htab->plt_entry_size);
+
+ /* Calculate the offset of the associated .got.plt entry.
+ The first three entries are reserved. */
+ got_offset = (rela_index + 3) * 4;
+
+ sparc_vxworks_build_plt_entry (output_bfd, info, h->plt.offset,
+ rela_index, got_offset);
+
+
+ /* On VxWorks, the relocation points to the .got.plt entry,
+ not the .plt entry. */
+ rela.r_offset = (htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset
+ + got_offset);
rela.r_addend = 0;
}
else
{
- rela.r_addend = -(h->plt.offset + 4)
- -(splt->output_section->vma + splt->output_offset);
+ /* Fill in the entry in the procedure linkage table. */
+ rela_index = SPARC_ELF_BUILD_PLT_ENTRY (htab, output_bfd, splt,
+ h->plt.offset, splt->size,
+ &r_offset);
+
+ rela.r_offset = r_offset
+ + (splt->output_section->vma + splt->output_offset);
+ if (! ABI_64_P (output_bfd)
+ || h->plt.offset < (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE))
+ {
+ rela.r_addend = 0;
+ }
+ else
+ {
+ rela.r_addend = (-(h->plt.offset + 4)
+ - splt->output_section->vma
+ - splt->output_offset);
+ }
}
rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx, R_SPARC_JMP_SLOT);
@@ -3577,10 +3796,12 @@ _bfd_sparc_elf_finish_dynamic_symbol (bfd *output_bfd,
SPARC_ELF_APPEND_RELA (htab, output_bfd, s, &rela);
}
- /* Mark some specially defined symbols as absolute. */
+ /* Mark some specially defined symbols as absolute. On VxWorks,
+ _GLOBAL_OFFSET_TABLE_ is not absolute: it is relative to the
+ ".got" section. Likewise _PROCEDURE_LINKAGE_TABLE_ and ".plt". */
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
- || h == htab->elf.hgot
- || h == htab->elf.hplt)
+ || (!htab->is_vxworks
+ && (h == htab->elf.hgot || h == htab->elf.hplt)))
sym->st_shndx = SHN_ABS;
return TRUE;
@@ -3648,13 +3869,14 @@ sparc64_finish_dyn (bfd *output_bfd, struct bfd_link_info *info,
#endif
static bfd_boolean
-sparc32_finish_dyn (bfd *output_bfd,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
+sparc32_finish_dyn (bfd *output_bfd, struct bfd_link_info *info,
bfd *dynobj, asection *sdyn,
asection *splt ATTRIBUTE_UNUSED)
{
Elf32_External_Dyn *dyncon, *dynconend;
+ struct _bfd_sparc_elf_link_hash_table *htab;
+ htab = _bfd_sparc_elf_hash_table (info);
dyncon = (Elf32_External_Dyn *) sdyn->contents;
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
for (; dyncon < dynconend; dyncon++)
@@ -3665,34 +3887,150 @@ sparc32_finish_dyn (bfd *output_bfd,
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
- switch (dyn.d_tag)
+ if (htab->is_vxworks && dyn.d_tag == DT_RELASZ)
{
- case DT_PLTGOT: name = ".plt"; size = FALSE; break;
- case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE; break;
- case DT_JMPREL: name = ".rela.plt"; size = FALSE; break;
- default: name = NULL; size = FALSE; break;
+ /* On VxWorks, DT_RELASZ should not include the relocations
+ in .rela.plt. */
+ if (htab->srelplt)
+ {
+ dyn.d_un.d_val -= htab->srelplt->size;
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ }
}
-
- if (name != NULL)
+ else if (htab->is_vxworks && dyn.d_tag == DT_PLTGOT)
{
- asection *s;
+ /* On VxWorks, DT_PLTGOT should point to the start of the GOT,
+ not to the start of the PLT. */
+ if (htab->sgotplt)
+ {
+ dyn.d_un.d_val = (htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset);
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ }
+ }
+ else
+ {
+ switch (dyn.d_tag)
+ {
+ case DT_PLTGOT: name = ".plt"; size = FALSE; break;
+ case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE; break;
+ case DT_JMPREL: name = ".rela.plt"; size = FALSE; break;
+ default: name = NULL; size = FALSE; break;
+ }
- s = bfd_get_section_by_name (output_bfd, name);
- if (s == NULL)
- dyn.d_un.d_val = 0;
- else
+ if (name != NULL)
{
- if (! size)
- dyn.d_un.d_ptr = s->vma;
+ asection *s;
+
+ s = bfd_get_section_by_name (output_bfd, name);
+ if (s == NULL)
+ dyn.d_un.d_val = 0;
else
- dyn.d_un.d_val = s->size;
+ {
+ if (! size)
+ dyn.d_un.d_ptr = s->vma;
+ else
+ dyn.d_un.d_val = s->size;
+ }
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
}
- bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
}
}
return TRUE;
}
+/* Install the first PLT entry in a VxWorks executable and make sure that
+ .rela.plt.unloaded relocations have the correct symbol indexes. */
+
+static void
+sparc_vxworks_finish_exec_plt (bfd *output_bfd, struct bfd_link_info *info)
+{
+ struct _bfd_sparc_elf_link_hash_table *htab;
+ Elf_Internal_Rela rela;
+ bfd_vma got_base;
+ bfd_byte *loc;
+
+ htab = _bfd_sparc_elf_hash_table (info);
+
+ /* Calculate the absolute value of _GLOBAL_OFFSET_TABLE_. */
+ got_base = (htab->elf.hgot->root.u.def.section->output_section->vma
+ + htab->elf.hgot->root.u.def.section->output_offset
+ + htab->elf.hgot->root.u.def.value);
+
+ /* Install the initial PLT entry. */
+ bfd_put_32 (output_bfd,
+ sparc_vxworks_exec_plt0_entry[0] + ((got_base + 8) >> 10),
+ htab->splt->contents);
+ bfd_put_32 (output_bfd,
+ sparc_vxworks_exec_plt0_entry[1] + ((got_base + 8) & 0x3ff),
+ htab->splt->contents + 4);
+ bfd_put_32 (output_bfd,
+ sparc_vxworks_exec_plt0_entry[2],
+ htab->splt->contents + 8);
+ bfd_put_32 (output_bfd,
+ sparc_vxworks_exec_plt0_entry[3],
+ htab->splt->contents + 12);
+ bfd_put_32 (output_bfd,
+ sparc_vxworks_exec_plt0_entry[4],
+ htab->splt->contents + 16);
+
+ loc = htab->srelplt2->contents;
+
+ /* Add an unloaded relocation for the initial entry's "sethi". */
+ rela.r_offset = (htab->splt->output_section->vma
+ + htab->splt->output_offset);
+ rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_HI22);
+ rela.r_addend = 8;
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ loc += sizeof (Elf32_External_Rela);
+
+ /* Likewise the following "or". */
+ rela.r_offset += 4;
+ rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_LO10);
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ loc += sizeof (Elf32_External_Rela);
+
+ /* Fix up the remaining .rela.plt.unloaded relocations. They may have
+ the wrong symbol index for _G_O_T_ or _P_L_T_ depending on the order
+ in which symbols were output. */
+ while (loc < htab->srelplt2->contents + htab->srelplt2->size)
+ {
+ Elf_Internal_Rela rel;
+
+ /* The entry's initial "sethi" (against _G_O_T_). */
+ bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
+ rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_HI22);
+ bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
+ loc += sizeof (Elf32_External_Rela);
+
+ /* The following "or" (also against _G_O_T_). */
+ bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
+ rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_LO10);
+ bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
+ loc += sizeof (Elf32_External_Rela);
+
+ /* The .got.plt entry (against _P_L_T_). */
+ bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
+ rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_SPARC_32);
+ bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
+ loc += sizeof (Elf32_External_Rela);
+ }
+}
+
+/* Install the first PLT entry in a VxWorks shared object. */
+
+static void
+sparc_vxworks_finish_shared_plt (bfd *output_bfd, struct bfd_link_info *info)
+{
+ struct _bfd_sparc_elf_link_hash_table *htab;
+ unsigned int i;
+
+ htab = _bfd_sparc_elf_hash_table (info);
+ for (i = 0; i < ARRAY_SIZE (sparc_vxworks_shared_plt0_entry); i++)
+ bfd_put_32 (output_bfd, sparc_vxworks_shared_plt0_entry[i],
+ htab->splt->contents + i * 4);
+}
+
bfd_boolean
_bfd_sparc_elf_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
{
@@ -3726,18 +4064,24 @@ _bfd_sparc_elf_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *i
/* Initialize the contents of the .plt section. */
if (splt->size > 0)
{
- if (ABI_64_P (output_bfd))
- memset (splt->contents, 0, 4 * PLT64_ENTRY_SIZE);
+ if (htab->is_vxworks)
+ {
+ if (info->shared)
+ sparc_vxworks_finish_shared_plt (output_bfd, info);
+ else
+ sparc_vxworks_finish_exec_plt (output_bfd, info);
+ }
else
{
- memset (splt->contents, 0, 4 * PLT32_ENTRY_SIZE);
- bfd_put_32 (output_bfd, (bfd_vma) SPARC_NOP,
- splt->contents + splt->size - 4);
+ memset (splt->contents, 0, htab->plt_header_size);
+ if (!ABI_64_P (output_bfd))
+ bfd_put_32 (output_bfd, (bfd_vma) SPARC_NOP,
+ splt->contents + splt->size - 4);
}
}
- elf_section_data (splt->output_section)->this_hdr.sh_entsize =
- (ABI_64_P (output_bfd) ? PLT64_ENTRY_SIZE : PLT32_ENTRY_SIZE);
+ elf_section_data (splt->output_section)->this_hdr.sh_entsize
+ = htab->plt_entry_size;
}
/* Set the first entry in the global offset table to the address of
diff --git a/bfd/elfxx-sparc.h b/bfd/elfxx-sparc.h
index 624aea527..0a5a88b 100644
--- a/bfd/elfxx-sparc.h
+++ b/bfd/elfxx-sparc.h
@@ -61,6 +61,15 @@ struct _bfd_sparc_elf_link_hash_table
/* Small local sym to section mapping cache. */
struct sym_sec_cache sym_sec;
+ /* True if the target system is VxWorks. */
+ int is_vxworks;
+
+ /* The (unloaded but important) .rela.plt.unloaded section, for VxWorks. */
+ asection *srelplt2;
+
+ /* .got.plt is only used on VxWorks. */
+ asection *sgotplt;
+
void (*put_word) (bfd *, bfd_vma, void *);
void (*append_rela) (bfd *, asection *, Elf_Internal_Rela *);
bfd_vma (*r_info) (Elf_Internal_Rela *, bfd_vma, bfd_vma);
@@ -70,6 +79,8 @@ struct _bfd_sparc_elf_link_hash_table
int dynamic_interpreter_size;
unsigned int word_align_power;
unsigned int align_power_max;
+ unsigned int plt_header_size;
+ unsigned int plt_entry_size;
int bytes_per_word;
int bytes_per_rela;
int dtpoff_reloc;
diff --git a/bfd/targets.c b/bfd/targets.c
index 0649179..849eb94 100644
--- a/bfd/targets.c
+++ b/bfd/targets.c
@@ -634,6 +634,7 @@ extern const bfd_target bfd_elf32_shlin_vec;
extern const bfd_target bfd_elf32_shlnbsd_vec;
extern const bfd_target bfd_elf32_shnbsd_vec;
extern const bfd_target bfd_elf32_sparc_vec;
+extern const bfd_target bfd_elf32_sparc_vxworks_vec;
extern const bfd_target bfd_elf32_tradbigmips_vec;
extern const bfd_target bfd_elf32_tradlittlemips_vec;
extern const bfd_target bfd_elf32_us_cris_vec;
@@ -948,6 +949,7 @@ static const bfd_target * const _bfd_target_vector[] = {
&bfd_elf32_sh64blin_vec,
#endif
&bfd_elf32_sparc_vec,
+ &bfd_elf32_sparc_vxworks_vec,
&bfd_elf32_tradbigmips_vec,
&bfd_elf32_tradlittlemips_vec,
&bfd_elf32_us_cris_vec,
generated by cgit v1.1 at 2024-12-21 07:57:20 +0000