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Diffstat (limited to 'bfd/elf64-x86-64.c')
-rw-r--r--bfd/elf64-x86-64.c222
1 files changed, 196 insertions, 26 deletions
diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c
index 51204a5..f2f803a 100644
--- a/bfd/elf64-x86-64.c
+++ b/bfd/elf64-x86-64.c
@@ -982,7 +982,7 @@ elf_x86_64_create_dynamic_sections (bfd *dynobj,
&& htab->elf.splt != NULL)
{
const struct elf_x86_64_backend_data *const abed
- = get_elf_x86_64_backend_data (dynobj);
+ = get_elf_x86_64_backend_data (dynobj);
flagword flags = get_elf_backend_data (dynobj)->dynamic_sec_flags;
htab->plt_eh_frame
= bfd_make_section_with_flags (dynobj, ".eh_frame",
@@ -993,9 +993,9 @@ elf_x86_64_create_dynamic_sections (bfd *dynobj,
htab->plt_eh_frame->size = abed->eh_frame_plt_size;
htab->plt_eh_frame->contents
- = bfd_alloc (dynobj, htab->plt_eh_frame->size);
+ = bfd_alloc (dynobj, htab->plt_eh_frame->size);
memcpy (htab->plt_eh_frame->contents,
- abed->eh_frame_plt, abed->eh_frame_plt_size);
+ abed->eh_frame_plt, abed->eh_frame_plt_size);
}
return TRUE;
}
@@ -1075,6 +1075,14 @@ elf64_x86_64_elf_object_p (bfd *abfd)
return TRUE;
}
+static bfd_boolean
+elf32_x86_64_elf_object_p (bfd *abfd)
+{
+ /* Set the right machine number for an x86-64 elf32 file. */
+ bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
+ return TRUE;
+}
+
/* Return TRUE if the TLS access code sequence support transition
from R_TYPE. */
@@ -5087,6 +5095,179 @@ static const struct bfd_elf_special_section
#include "elf64-target.h"
+/* Native Client support. */
+
+#undef TARGET_LITTLE_SYM
+#define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec
+#undef TARGET_LITTLE_NAME
+#define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
+#undef elf64_bed
+#define elf64_bed elf64_x86_64_nacl_bed
+
+#undef ELF_MAXPAGESIZE
+#undef ELF_MINPAGESIZE
+#undef ELF_COMMONPAGESIZE
+#define ELF_MAXPAGESIZE 0x10000
+#define ELF_MINPAGESIZE 0x10000
+#define ELF_COMMONPAGESIZE 0x10000
+
+/* Restore defaults. */
+#undef ELF_OSABI
+#undef elf_backend_static_tls_alignment
+#undef elf_backend_want_plt_sym
+#define elf_backend_want_plt_sym 0
+
+/* NaCl uses substantially different PLT entries for the same effects. */
+
+#undef elf_backend_plt_alignment
+#define elf_backend_plt_alignment 5
+#define NACL_PLT_ENTRY_SIZE 64
+#define NACLMASK 0xe0 /* 32-byte alignment mask. */
+
+static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
+ {
+ 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
+ 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
+ 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
+ 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
+ 0x41, 0xff, 0xe3, /* jmpq *%r11 */
+
+ /* 41 bytes of nop to pad out to the standard size. */
+ 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
+ 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
+ 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
+ 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
+ 0x66, 0x66, /* excess data32 prefixes */
+ 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
+ };
+
+static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
+ {
+ 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
+ 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
+ 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
+ 0x41, 0xff, 0xe3, /* jmpq *%r11 */
+
+ /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
+ 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
+ 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
+
+ /* Lazy GOT entries point here (32-byte aligned). */
+ 0x68, /* pushq immediate */
+ 0, 0, 0, 0, /* replaced with index into relocation table. */
+ 0xe9, /* jmp relative */
+ 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
+
+ /* 22 bytes of nop to pad out to the standard size. */
+ 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
+ 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
+ 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
+ };
+
+/* .eh_frame covering the .plt section. */
+
+static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
+ {
+#if (PLT_CIE_LENGTH != 20 \
+ || PLT_FDE_LENGTH != 36 \
+ || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
+ || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
+# error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
+#endif
+ PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
+ 0, 0, 0, 0, /* CIE ID */
+ 1, /* CIE version */
+ 'z', 'R', 0, /* Augmentation string */
+ 1, /* Code alignment factor */
+ 0x78, /* Data alignment factor */
+ 16, /* Return address column */
+ 1, /* Augmentation size */
+ DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
+ DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
+ DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
+ DW_CFA_nop, DW_CFA_nop,
+
+ PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
+ PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
+ 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
+ 0, 0, 0, 0, /* .plt size goes here */
+ 0, /* Augmentation size */
+ DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
+ DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
+ DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
+ DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
+ DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
+ 13, /* Block length */
+ DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
+ DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
+ DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
+ DW_OP_lit3, DW_OP_shl, DW_OP_plus,
+ DW_CFA_nop, DW_CFA_nop
+ };
+
+static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
+ {
+ elf_x86_64_nacl_plt0_entry, /* plt0_entry */
+ elf_x86_64_nacl_plt_entry, /* plt_entry */
+ NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
+ 2, /* plt0_got1_offset */
+ 9, /* plt0_got2_offset */
+ 13, /* plt0_got2_insn_end */
+ 3, /* plt_got_offset */
+ 33, /* plt_reloc_offset */
+ 38, /* plt_plt_offset */
+ 7, /* plt_got_insn_size */
+ 42, /* plt_plt_insn_end */
+ 32, /* plt_lazy_offset */
+ elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
+ sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
+ };
+
+#undef elf_backend_arch_data
+#define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
+
+#include "elf64-target.h"
+
+/* Native Client x32 support. */
+
+#undef TARGET_LITTLE_SYM
+#define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec
+#undef TARGET_LITTLE_NAME
+#define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
+#undef elf32_bed
+#define elf32_bed elf32_x86_64_nacl_bed
+
+#define bfd_elf32_bfd_link_hash_table_create \
+ elf_x86_64_link_hash_table_create
+#define bfd_elf32_bfd_link_hash_table_free \
+ elf_x86_64_link_hash_table_free
+#define bfd_elf32_bfd_reloc_type_lookup \
+ elf_x86_64_reloc_type_lookup
+#define bfd_elf32_bfd_reloc_name_lookup \
+ elf_x86_64_reloc_name_lookup
+#define bfd_elf32_mkobject \
+ elf_x86_64_mkobject
+
+#undef elf_backend_object_p
+#define elf_backend_object_p \
+ elf32_x86_64_elf_object_p
+
+#undef elf_backend_bfd_from_remote_memory
+#define elf_backend_bfd_from_remote_memory \
+ _bfd_elf32_bfd_from_remote_memory
+
+#undef elf_backend_size_info
+#define elf_backend_size_info \
+ _bfd_elf32_size_info
+
+#include "elf32-target.h"
+
+/* Restore defaults. */
+#undef elf_backend_object_p
+#define elf_backend_object_p elf64_x86_64_elf_object_p
+#undef elf_backend_bfd_from_remote_memory
+#undef elf_backend_size_info
+
/* Intel L1OM support. */
static bfd_boolean
@@ -5115,10 +5296,17 @@ elf64_l1om_elf_object_p (bfd *abfd)
#undef elf_backend_object_p
#define elf_backend_object_p elf64_l1om_elf_object_p
-#undef elf_backend_static_tls_alignment
-
-#undef elf_backend_want_plt_sym
-#define elf_backend_want_plt_sym 0
+/* Restore defaults. */
+#undef ELF_MAXPAGESIZE
+#undef ELF_MINPAGESIZE
+#undef ELF_COMMONPAGESIZE
+#define ELF_MAXPAGESIZE 0x200000
+#define ELF_MINPAGESIZE 0x1000
+#define ELF_COMMONPAGESIZE 0x1000
+#undef elf_backend_plt_alignment
+#define elf_backend_plt_alignment 4
+#undef elf_backend_arch_data
+#define elf_backend_arch_data &elf_x86_64_arch_bed
#include "elf64-target.h"
@@ -5189,18 +5377,11 @@ elf64_k1om_elf_object_p (bfd *abfd)
/* 32bit x86-64 support. */
-static bfd_boolean
-elf32_x86_64_elf_object_p (bfd *abfd)
-{
- /* Set the right machine number for an x86-64 elf32 file. */
- bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
- return TRUE;
-}
-
#undef TARGET_LITTLE_SYM
#define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf32-x86-64"
+#undef elf32_bed
#undef ELF_ARCH
#define ELF_ARCH bfd_arch_i386
@@ -5208,17 +5389,6 @@ elf32_x86_64_elf_object_p (bfd *abfd)
#undef ELF_MACHINE_CODE
#define ELF_MACHINE_CODE EM_X86_64
-#define bfd_elf32_bfd_link_hash_table_create \
- elf_x86_64_link_hash_table_create
-#define bfd_elf32_bfd_link_hash_table_free \
- elf_x86_64_link_hash_table_free
-#define bfd_elf32_bfd_reloc_type_lookup \
- elf_x86_64_reloc_type_lookup
-#define bfd_elf32_bfd_reloc_name_lookup \
- elf_x86_64_reloc_name_lookup
-#define bfd_elf32_mkobject \
- elf_x86_64_mkobject
-
#undef ELF_OSABI
#undef elf_backend_object_p
generated by cgit v1.1 at 2024-11-25 19:27:36 +0000