gas: Add md_generic_table_relax_frag

[deliverable/binutils-gdb.git] / bfd / elf32-wasm32.c

diff --git a/bfd/elf32-wasm32.c b/bfd/elf32-wasm32.c
index 9b3827248fb464be331842843eac97fb9bb6ffba..0e731984d338627b71021836d5b73a7919513f15 100644 (file)
--- a/bfd/elf32-wasm32.c
+++ b/bfd/elf32-wasm32.c
@@ -1,5 +1,5 @@
 /* 32-bit ELF for the WebAssembly target
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2019 Free Software Foundation, Inc.
 
    This file is part of BFD, the Binary File Descriptor library.
 
@@ -22,9 +22,111 @@
 #include "bfd.h"
 #include "libbfd.h"
 #include "elf-bfd.h"
-#include "bfd_stdint.h"
+#include "libiberty.h"
 #include "elf/wasm32.h"
 
+static reloc_howto_type elf32_wasm32_howto_table[] =
+{
+  HOWTO (R_WASM32_NONE,                /* type */
+        0,                     /* rightshift */
+        3,                     /* size (0 = byte, 1 = short, 2 = long) */
+        0,                     /* bitsize */
+        FALSE,                 /* pc_relative */
+        0,                     /* bitpos */
+        complain_overflow_dont,/* complain_on_overflow */
+        bfd_elf_generic_reloc, /* special_function */
+        "R_WASM32_NONE",       /* name */
+        FALSE,                 /* partial_inplace */
+        0,                     /* src_mask */
+        0,                     /* dst_mask */
+        FALSE),                /* pcrel_offset */
+
+  /* 32 bit absolute */
+  HOWTO (R_WASM32_32,          /* type */
+        0,                     /* rightshift */
+        2,                     /* size (0 = byte, 1 = short, 2 = long) */
+        32,                    /* bitsize */
+        FALSE,                 /* pc_relative */
+        0,                     /* bitpos */
+        complain_overflow_bitfield,/* complain_on_overflow */
+        bfd_elf_generic_reloc, /* special_function */
+        "R_WASM32_32", /* name */
+        FALSE,                 /* partial_inplace */
+        0xffffffff,            /* src_mask */
+        0xffffffff,            /* dst_mask */
+        FALSE),                /* pcrel_offset */
+};
+
+/* Look up the relocation CODE.  */
+
+static reloc_howto_type *
+elf32_wasm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+                               bfd_reloc_code_real_type code)
+{
+  switch (code)
+    {
+    case BFD_RELOC_NONE:
+      return &elf32_wasm32_howto_table[R_WASM32_NONE];
+    case BFD_RELOC_32:
+      return &elf32_wasm32_howto_table[R_WASM32_32];
+    default:
+      break;
+    }
+
+  return NULL;
+}
+
+/* Look up the relocation R_NAME.  */
+
+static reloc_howto_type *
+elf32_wasm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+                               const char *r_name)
+{
+  unsigned int i;
+
+  for (i = 0; i < ARRAY_SIZE (elf32_wasm32_howto_table); i++)
+    if (elf32_wasm32_howto_table[i].name != NULL
+       && strcasecmp (elf32_wasm32_howto_table[i].name, r_name) == 0)
+      return &elf32_wasm32_howto_table[i];
+
+  return NULL;
+}
+
+/* Look up the relocation R_TYPE.  */
+
+static reloc_howto_type *
+elf32_wasm32_rtype_to_howto (bfd *abfd, unsigned r_type)
+{
+  unsigned int i = r_type;
+
+  if (i >= ARRAY_SIZE (elf32_wasm32_howto_table))
+    {
+      /* xgettext:c-format */
+      _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
+                         abfd, r_type);
+      bfd_set_error (bfd_error_bad_value);
+      return NULL;
+    }
+
+  if (elf32_wasm32_howto_table[i].type != r_type)
+    return NULL;
+
+  return elf32_wasm32_howto_table + i;
+}
+
+/* Translate the ELF-internal relocation RELA into CACHE_PTR.  */
+
+static bfd_boolean
+elf32_wasm32_info_to_howto_rela (bfd *abfd,
+                               arelent *cache_ptr,
+                               Elf_Internal_Rela *dst)
+{
+  unsigned int r_type = ELF32_R_TYPE (dst->r_info);
+
+  cache_ptr->howto = elf32_wasm32_rtype_to_howto (abfd, r_type);
+  return cache_ptr->howto != NULL;
+}
+
 #define ELF_ARCH               bfd_arch_wasm32
 #define ELF_TARGET_ID          EM_WEBASSEMBLY
 #define ELF_MACHINE_CODE       EM_WEBASSEMBLY
@@ -32,21 +134,24 @@
    https://github.com/pipcet/binutils-gdb/issues/4  */
 #define ELF_MAXPAGESIZE                4096
 
-#define TARGET_LITTLE_SYM       wasm32_elf32_vec
+#define TARGET_LITTLE_SYM      wasm32_elf32_vec
 #define TARGET_LITTLE_NAME     "elf32-wasm32"
 
-#define elf_backend_can_gc_sections     1
-#define elf_backend_rela_normal         1
+#define elf_backend_can_gc_sections    1
+#define elf_backend_rela_normal                1
 /* For testing. */
-#define elf_backend_want_dynrelro       1
+#define elf_backend_want_dynrelro      1
+
+#define elf_info_to_howto              elf32_wasm32_info_to_howto_rela
+#define elf_info_to_howto_rel          NULL
 
-#define bfd_elf32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
-#define bfd_elf32_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
+#define bfd_elf32_bfd_reloc_type_lookup elf32_wasm32_reloc_type_lookup
+#define bfd_elf32_bfd_reloc_name_lookup elf32_wasm32_reloc_name_lookup
 
-#define ELF_DYNAMIC_INTERPRETER  "/sbin/elf-dynamic-interpreter.so"
+#define ELF_DYNAMIC_INTERPRETER         "/sbin/elf-dynamic-interpreter.so"
 
-#define elf_backend_want_got_plt       1
-#define elf_backend_plt_readonly       1
-#define elf_backend_got_header_size    0
+#define elf_backend_want_got_plt       1
+#define elf_backend_plt_readonly       1
+#define elf_backend_got_header_size    0
 
 #include "elf32-target.h"