/* AArch64-specific backend routines.
- Copyright (C) 2009-2016 Free Software Foundation, Inc.
+ Copyright (C) 2009-2019 Free Software Foundation, Inc.
Contributed by ARM Ltd.
This file is part of BFD, the Binary File Descriptor library.
along with this program; see the file COPYING3. If not,
see <http://www.gnu.org/licenses/>. */
-#include "bfd.h"
-#include "elf-bfd.h"
-#include "stdint.h"
+extern void bfd_elf64_aarch64_init_maps
+ (bfd *);
+
+extern void bfd_elf32_aarch64_init_maps
+ (bfd *);
+
+/* Types of PLTs based on the level of security. This would be a
+ bit-mask to denote which of the combinations of security features
+ are enabled:
+ - No security feature PLTs
+ - PLTs with BTI instruction
+ - PLTs with PAC instruction
+*/
+typedef enum
+{
+ PLT_NORMAL = 0x0, /* Normal plts. */
+ PLT_BTI = 0x1, /* plts with bti. */
+ PLT_PAC = 0x2, /* plts with pointer authentication. */
+ PLT_BTI_PAC = PLT_BTI | PLT_PAC
+} aarch64_plt_type;
+
+/* To indicate if BTI is enabled with/without warning. */
+typedef enum
+{
+ BTI_NONE = 0, /* BTI is not enabled. */
+ BTI_WARN = 1, /* BTI is enabled with -z force-bti. */
+} aarch64_enable_bti_type;
+
+/* A structure to encompass all information coming from BTI or PAC
+ related command line options. This involves the "PLT_TYPE" to determine
+ which version of PLTs to pick and "BTI_TYPE" to determine if
+ BTI should be turned on with any warnings. */
+typedef struct
+{
+ aarch64_plt_type plt_type;
+ aarch64_enable_bti_type bti_type;
+} aarch64_bti_pac_info;
+
+/* An enum to define what kind of erratum fixes we should apply. This gives the
+ user a bit more control over the sequences we generate. */
+typedef enum
+{
+ ERRAT_NONE = (1 << 0), /* No erratum workarounds allowed. */
+ ERRAT_ADR = (1 << 1), /* Erratum workarounds using ADR allowed. */
+ ERRAT_ADRP = (1 << 2), /* Erratum workarounds using ADRP are allowed. */
+} erratum_84319_opts;
+
+extern void bfd_elf64_aarch64_set_options
+ (bfd *, struct bfd_link_info *, int, int, int, int, erratum_84319_opts, int,
+ aarch64_bti_pac_info);
+
+extern void bfd_elf32_aarch64_set_options
+ (bfd *, struct bfd_link_info *, int, int, int, int, erratum_84319_opts, int,
+ aarch64_bti_pac_info);
+
+/* AArch64 stub generation support for ELF64. Called from the linker. */
+extern int elf64_aarch64_setup_section_lists
+ (bfd *, struct bfd_link_info *);
+extern void elf64_aarch64_next_input_section
+ (struct bfd_link_info *, struct bfd_section *);
+extern bfd_boolean elf64_aarch64_size_stubs
+ (bfd *, bfd *, struct bfd_link_info *, bfd_signed_vma,
+ struct bfd_section * (*) (const char *, struct bfd_section *),
+ void (*) (void));
+extern bfd_boolean elf64_aarch64_build_stubs
+ (struct bfd_link_info *);
+/* AArch64 stub generation support for ELF32. Called from the linker. */
+extern int elf32_aarch64_setup_section_lists
+ (bfd *, struct bfd_link_info *);
+extern void elf32_aarch64_next_input_section
+ (struct bfd_link_info *, struct bfd_section *);
+extern bfd_boolean elf32_aarch64_size_stubs
+ (bfd *, bfd *, struct bfd_link_info *, bfd_signed_vma,
+ struct bfd_section * (*) (const char *, struct bfd_section *),
+ void (*) (void));
+extern bfd_boolean elf32_aarch64_build_stubs
+ (struct bfd_link_info *);
/* Take the PAGE component of an address or offset. */
-#define PG(x) ((x) & ~ (bfd_vma) 0xfff)
+#define PG(x) ((x) & ~ (bfd_vma) 0xfff)
#define PG_OFFSET(x) ((x) & (bfd_vma) 0xfff)
#define AARCH64_ADR_OP 0x10000000
reloc_howto_type *, bfd_signed_vma);
extern bfd_vma
-_bfd_aarch64_elf_resolve_relocation (bfd_reloc_code_real_type, bfd_vma, bfd_vma,
- bfd_vma, bfd_boolean);
-
-extern bfd_boolean
-_bfd_aarch64_elf_add_symbol_hook (bfd *, struct bfd_link_info *,
- Elf_Internal_Sym *, const char **,
- flagword *, asection **, bfd_vma *);
+_bfd_aarch64_elf_resolve_relocation (bfd *, bfd_reloc_code_real_type, bfd_vma,
+ bfd_vma, bfd_vma, bfd_boolean);
extern bfd_boolean
_bfd_aarch64_elf_grok_prstatus (bfd *, Elf_Internal_Note *);
extern char *
_bfd_aarch64_elf_write_core_note (bfd *, char *, int *, int, ...);
-#define elf_backend_add_symbol_hook _bfd_aarch64_elf_add_symbol_hook
#define elf_backend_grok_prstatus _bfd_aarch64_elf_grok_prstatus
-#define elf_backend_grok_psinfo _bfd_aarch64_elf_grok_psinfo
-#define elf_backend_write_core_note _bfd_aarch64_elf_write_core_note
+#define elf_backend_grok_psinfo _bfd_aarch64_elf_grok_psinfo
+#define elf_backend_write_core_note _bfd_aarch64_elf_write_core_note
+
+extern bfd *
+_bfd_aarch64_elf_link_setup_gnu_properties (struct bfd_link_info *,
+ uint32_t *);
+
+extern enum elf_property_kind
+_bfd_aarch64_elf_parse_gnu_properties (bfd *, unsigned int,
+ bfd_byte *, unsigned int);
+
+extern bfd_boolean
+_bfd_aarch64_elf_merge_gnu_properties (struct bfd_link_info *, bfd *,
+ elf_property *, elf_property *,
+ uint32_t);
+
+extern void
+_bfd_aarch64_elf_link_fixup_gnu_properties (struct bfd_link_info *,
+ elf_property_list **);
+
+#define elf_backend_parse_gnu_properties \
+ _bfd_aarch64_elf_parse_gnu_properties
+
+#define elf_backend_fixup_gnu_properties \
+ _bfd_aarch64_elf_link_fixup_gnu_properties