gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / bfd / elf64-bpf.c

diff --git a/bfd/elf64-bpf.c b/bfd/elf64-bpf.c
index 3e11f089ecb7f0adda32a5eb1ab4a6f3d355e164..641caa1f058e07a99c3cdb94086fb3586b417d88 100644 (file)
--- a/bfd/elf64-bpf.c
+++ b/bfd/elf64-bpf.c
@@ -1,5 +1,5 @@
 /* Linux bpf specific support for 64-bit ELF
-   Copyright (C) 2019 Free Software Foundation, Inc.
+   Copyright (C) 2019-2020 Free Software Foundation, Inc.
    Contributed by Oracle Inc.
 
    This file is part of BFD, the Binary File Descriptor library.
@@ -64,7 +64,7 @@ static reloc_howto_type bpf_elf_howto_table [] =
         MINUS_ONE,             /* dst_mask */
         TRUE),                 /* pcrel_offset */
 
-  /* 32-immediate in LDDW instruction.  */
+  /* 32-immediate in many instructions. Note: handled manually.  */
   HOWTO (R_BPF_INSN_32,                /* type */
         0,                     /* rightshift */
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
@@ -407,7 +407,7 @@ bpf_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
 
          name = bfd_elf_string_from_elf_section
            (input_bfd, symtab_hdr->sh_link, sym->st_name);
-         name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
+         name = name == NULL ? bfd_section_name (sec) : name;
        }
       else
        {
@@ -460,6 +460,31 @@ bpf_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
             r = bfd_reloc_ok;
             break;
           }
+        case R_BPF_INSN_32:
+          {
+            /*  Write relocated value */
+            bfd_put (howto->bitsize, input_bfd, relocation,
+                     contents + rel->r_offset + 4);
+
+            r = bfd_reloc_ok;
+            break;
+          }
+        case R_BPF_INSN_64:
+          {
+            /*
+                LDDW instructions are 128 bits long, with a 64-bit immediate.
+                The lower 32 bits of the immediate are in the same position
+                as the imm32 field of other instructions.
+                The upper 32 bits of the immediate are stored at the end of
+                the instruction.
+             */
+            bfd_put (32, input_bfd, (relocation & 0xFFFFFFFF),
+                     contents + rel->r_offset + 4);
+            bfd_put (32, input_bfd, (relocation >> 32),
+                     contents + rel->r_offset + 12);
+            r = bfd_reloc_ok;
+            break;
+          }
         default:
           r = _bfd_final_link_relocate (howto, input_bfd, input_section,
                                         contents, rel->r_offset, relocation,