gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / bfd / elfxx-x86.h

diff --git a/bfd/elfxx-x86.h b/bfd/elfxx-x86.h
index dce24dc10690366c3d14d83c7cb82846db1ae928..c717cd16e56ed18749fd9589410cad42adada3b9 100644 (file)
--- a/bfd/elfxx-x86.h
+++ b/bfd/elfxx-x86.h
@@ -1,5 +1,5 @@
 /* x86 specific support for ELF
-   Copyright (C) 2017-2019 Free Software Foundation, Inc.
+   Copyright (C) 2017-2020 Free Software Foundation, Inc.
 
    This file is part of BFD, the Binary File Descriptor library.
 
@@ -24,6 +24,7 @@
 #include "libbfd.h"
 #include "elf-bfd.h"
 #include "hashtab.h"
+#include "elf-linker-x86.h"
 
 #define PLT_CIE_LENGTH         20
 #define PLT_FDE_LENGTH         36
@@ -118,19 +119,23 @@
    Copy dynamic function pointer relocations.  Don't generate dynamic
    relocations against resolved undefined weak symbols in PIE, except
    when PC32_RELOC is TRUE.  Undefined weak symbol is bound locally
-   when PIC is false.  */
-#define GENERATE_DYNAMIC_RELOCATION_P(INFO, EH, R_TYPE, \
+   when PIC is false.  Don't generate dynamic relocations against
+   non-preemptible absolute symbol.  */
+#define GENERATE_DYNAMIC_RELOCATION_P(INFO, EH, R_TYPE, SEC, \
                                      NEED_COPY_RELOC_IN_PIE, \
                                      RESOLVED_TO_ZERO, PC32_RELOC) \
   ((bfd_link_pic (INFO) \
+    && !(bfd_is_abs_section (SEC) \
+        && ((EH) == NULL \
+            || SYMBOL_REFERENCES_LOCAL (INFO, &(EH)->elf))) \
     && !(NEED_COPY_RELOC_IN_PIE) \
     && ((EH) == NULL \
        || ((ELF_ST_VISIBILITY ((EH)->elf.other) == STV_DEFAULT \
             && (!(RESOLVED_TO_ZERO) || PC32_RELOC)) \
            || (EH)->elf.root.type != bfd_link_hash_undefweak)) \
-    && ((!X86_PCREL_TYPE_P (R_TYPE) \
-        && !X86_SIZE_TYPE_P (R_TYPE)) \
-        || ! SYMBOL_CALLS_LOCAL ((INFO), &(EH)->elf))) \
+    && ((!X86_PCREL_TYPE_P (R_TYPE) && !X86_SIZE_TYPE_P (R_TYPE)) \
+       || ! SYMBOL_CALLS_LOCAL ((INFO), \
+                                (struct elf_link_hash_entry *) (EH)))) \
    || (ELIMINATE_COPY_RELOCS \
        && !bfd_link_pic (INFO) \
        && (EH) != NULL \
@@ -161,17 +166,33 @@
        || (ELF_ST_VISIBILITY ((H)->other) \
           && (H)->root.type == bfd_link_hash_undefweak))
 
+/* TRUE if this symbol isn't defined by a shared object.  */
+#define SYMBOL_DEFINED_NON_SHARED_P(H) \
+  ((H)->def_regular \
+   || (H)->root.linker_def \
+   || (H)->root.ldscript_def \
+   || ((struct elf_x86_link_hash_entry *) (H))->linker_def \
+   || ELF_COMMON_DEF_P (H))
+
+/* Return TRUE if the symbol described by a linker hash entry H is
+   going to be absolute.  Similar to bfd_is_abs_symbol, but excluding
+   all linker-script defined symbols.  */
+#define ABS_SYMBOL_P(H) \
+  (bfd_is_abs_symbol (&(H)->root) && !(H)->root.ldscript_def)
+
 /* TRUE if relative relocation should be generated.  GOT reference to
    global symbol in PIC will lead to dynamic symbol.  It becomes a
    problem when "time" or "times" is defined as a variable in an
    executable, clashing with functions of the same name in libc.  If a
    symbol isn't undefined weak symbol, don't make it dynamic in PIC and
-   generate relative relocation.  */
+   generate relative relocation.   Don't generate relative relocation
+   against non-preemptible absolute symbol.  */
 #define GENERATE_RELATIVE_RELOC_P(INFO, H) \
   ((H)->dynindx == -1 \
    && !(H)->forced_local \
    && (H)->root.type != bfd_link_hash_undefweak \
-   && bfd_link_pic (INFO))
+   && bfd_link_pic (INFO) \
+   && !ABS_SYMBOL_P (H))
 
 /* TRUE if this is a pointer reference to a local IFUNC.  */
 #define POINTER_LOCAL_IFUNC_P(INFO, H) \
@@ -229,9 +250,6 @@ struct elf_x86_link_hash_entry
 {
   struct elf_link_hash_entry elf;
 
-  /* Track dynamic relocs copied for this symbol.  */
-  struct elf_dyn_relocs *dyn_relocs;
-
   unsigned char tls_type;
 
   /* Bit 0: Symbol has no GOT nor PLT relocations.
@@ -405,6 +423,7 @@ struct elf_x86_plt_layout
 #define GOT_TLS_IE_NEG 6
 #define GOT_TLS_IE_BOTH 7
 #define GOT_TLS_GDESC  8
+#define GOT_ABS                9
 #define GOT_TLS_GD_BOTH_P(type)        \
   ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
 #define GOT_TLS_GD_P(type) \
@@ -523,6 +542,9 @@ struct elf_x86_link_hash_table
   int dynamic_interpreter_size;
   const char *dynamic_interpreter;
   const char *tls_get_addr;
+
+  /* Options passed from the linker.  */
+  struct elf_linker_x86_params *params;
 };
 
 /* Architecture-specific backend data for x86.  */
@@ -589,6 +611,9 @@ struct elf_x86_plt
   long count;
 };
 
+/* Set if a relocation is converted from a GOTPCREL relocation.  */
+#define R_X86_64_converted_reloc_bit (1 << 7)
+
 #define elf_x86_tdata(abfd) \
   ((struct elf_x86_obj_tdata *) (abfd)->tdata.any)
 
@@ -640,6 +665,11 @@ extern int _bfd_x86_elf_compare_relocs
 extern bfd_boolean _bfd_x86_elf_link_check_relocs
   (bfd *, struct bfd_link_info *);
 
+extern bfd_boolean _bfd_elf_x86_valid_reloc_p
+  (asection *, struct bfd_link_info *, struct elf_x86_link_hash_table *,
+   const Elf_Internal_Rela *, struct elf_link_hash_entry *,
+   Elf_Internal_Sym *, Elf_Internal_Shdr *, bfd_boolean *);
+
 extern bfd_boolean _bfd_x86_elf_size_dynamic_sections
   (bfd *, struct bfd_link_info *);
 
@@ -684,7 +714,7 @@ extern enum elf_property_kind _bfd_x86_elf_parse_gnu_properties
   (bfd *, unsigned int, bfd_byte *, unsigned int);
 
 extern bfd_boolean _bfd_x86_elf_merge_gnu_properties
-  (struct bfd_link_info *, bfd *, elf_property *, elf_property *);
+  (struct bfd_link_info *, bfd *, bfd *, elf_property *, elf_property *);
 
 extern void _bfd_x86_elf_link_fixup_gnu_properties
   (struct bfd_link_info *, elf_property_list **);