[PATCH 7/7] binutils/readelf: handle AMDGPU relocation types

[Simon Marchi]

From: Simon Marchi <simon.marchi@efficios.com>

Make readelf recognize AMDGPU relocation types, as documented here:

  https://llvm.org/docs/AMDGPUUsage.html#amdgpu-relocation-records

The user-visible change looks like:

    -000000000004  000400000001 unrecognized: 1       0000000000000000 SCRATCH_RSRC_DWORD0
    -00000000000c  000500000001 unrecognized: 1       0000000000000000 SCRATCH_RSRC_DWORD1
    -000000000014  000600000007 unrecognized: 7       0000000000000000 global_var0
    -00000000001c  000700000008 unrecognized: 8       0000000000000000 global_var1
    -000000000024  000800000009 unrecognized: 9       0000000000000000 global_var2
    -00000000002c  00090000000a unrecognized: a       0000000000000000 global_var3
    -000000000034  000a0000000b unrecognized: b       0000000000000000 global_var4
    +000000000004  000400000001 R_AMDGPU_ABS32_LO 0000000000000000 SCRATCH_RSRC_DWORD0
    +00000000000c  000500000001 R_AMDGPU_ABS32_LO 0000000000000000 SCRATCH_RSRC_DWORD1
    +000000000014  000600000007 R_AMDGPU_GOTPCREL 0000000000000000 global_var0
    +00000000001c  000700000008 R_AMDGPU_GOTPCREL 0000000000000000 global_var1
    +000000000024  000800000009 R_AMDGPU_GOTPCREL 0000000000000000 global_var2
    +00000000002c  00090000000a R_AMDGPU_REL32_LO 0000000000000000 global_var3
    +000000000034  000a0000000b R_AMDGPU_REL32_HI 0000000000000000 global_var4

binutils/ChangeLog:

	* readelf.c (dump_relocations): Handle EM_AMDGPU.

include/ChangeLog:

	* elf/amdgpu.h: Add relocation values.

Change-Id: I2ed4589f4cd37ea11ad2e0cb38d4b682271e1334
---
 binutils/readelf.c   |  3 +++
 include/elf/amdgpu.h | 21 +++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/binutils/readelf.c b/binutils/readelf.c
index ff07112eb843..a2dbaa4722e3 100644
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -1930,6 +1930,9 @@ dump_relocations (Filedata *          filedata,
 	  rtype = elf_loongarch_reloc_type (type);
 	  break;
 
+	case EM_AMDGPU:
+	  rtype = elf_amdgpu_reloc_type (type);
+	  break;
 	}
 
       if (rtype == NULL)
diff --git a/include/elf/amdgpu.h b/include/elf/amdgpu.h
index e3c90dc74e85..140e8996ad25 100644
--- a/include/elf/amdgpu.h
+++ b/include/elf/amdgpu.h
@@ -20,6 +20,8 @@
 #ifndef _ELF_AMDGPU_H
 #define _ELF_AMDGPU_H
 
+#include "elf/reloc-macros.h"
+
 /* e_ident[EI_ABIVERSION] values, when e_ident[EI_OSABI] is
    ELFOSABI_AMDGPU_HSA.  */
 
@@ -91,4 +93,23 @@
 
 #define NT_AMDGPU_METADATA                32
 
+/* Relocations.  */
+
+START_RELOC_NUMBERS (elf_amdgpu_reloc_type)
+ RELOC_NUMBER (R_AMDGPU_NONE,           0)
+ RELOC_NUMBER (R_AMDGPU_ABS32_LO,       1)
+ RELOC_NUMBER (R_AMDGPU_ABS32_HI,       2)
+ RELOC_NUMBER (R_AMDGPU_ABS64,          3)
+ RELOC_NUMBER (R_AMDGPU_REL32,          4)
+ RELOC_NUMBER (R_AMDGPU_REL64,          5)
+ RELOC_NUMBER (R_AMDGPU_ABS32,          6)
+ RELOC_NUMBER (R_AMDGPU_GOTPCREL,       7)
+ RELOC_NUMBER (R_AMDGPU_GOTPCREL32_LO,  8)
+ RELOC_NUMBER (R_AMDGPU_GOTPCREL32_HI,  9)
+ RELOC_NUMBER (R_AMDGPU_REL32_LO,      10)
+ RELOC_NUMBER (R_AMDGPU_REL32_HI,      11)
+ RELOC_NUMBER (R_AMDGPU_RELATIVE64,    13)
+ RELOC_NUMBER (R_AMDGPU_REL16,         16)
+END_RELOC_NUMBERS (R_AMDGPU_max)
+
 #endif /* _ELF_AMDGPU_H */
-- 
2.35.1