or1k: Implement relocation R_OR1K_GOT_AHI16 for gotha()

The gotha() relocation mnemonic will be outputted by OpenRISC GCC when
using the -mcmodel=large option.  This relocation is used along with
got() to generate 32-bit GOT offsets.  This increases the previous GOT
offset limit from the previous 16-bit (64K) limit.

This is needed on large binaries where the GOT grows larger than 64k.

bfd/ChangeLog:

	PR 21464
	* bfd-in2.h: Add BFD_RELOC_OR1K_GOT_AHI16 relocation.
	* elf32-or1k.c (or1k_elf_howto_table, or1k_reloc_map): Likewise.
	(or1k_final_link_relocate, or1k_elf_relocate_section,
	or1k_elf_check_relocs): Likewise.
	* libbfd.h (bfd_reloc_code_real_names): Likewise.
	* reloc.c: Likewise.

cpu/ChangeLog:

	PR 21464
	* or1k.opc (or1k_imm16_relocs, parse_reloc): Define parse logic
	for gotha() relocation.

include/ChangeLog:

	PR 21464
	* elf/or1k.h (elf_or1k_reloc_type): Define R_OR1K_GOT_AHI16 number.

opcodes/ChangeLog:

	PR 21464
	* or1k-asm.c: Regenerate.

gas/ChangeLog:

	PR 21464
	* testsuite/gas/or1k/reloc-1.s: Add test for new relocation.
	* testsuite/gas/or1k/reloc-1.d: Add test result for new
	relocation.

Cc: Giulio Benetti <giulio.benetti@benettiengineering.com>

fixup reloc, add tests

5 files changed, 34 insertions, 1 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 7a6b9a1..c4a83df 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,5 +1,15 @@
 2021-05-06  Stafford Horne  <shorne@gmail.com>
 
+	PR 21464
+	* bfd-in2.h: Add BFD_RELOC_OR1K_GOT_AHI16 relocation.
+	* elf32-or1k.c (or1k_elf_howto_table, or1k_reloc_map): Likewise.
+	(or1k_final_link_relocate, or1k_elf_relocate_section,
+	or1k_elf_check_relocs): Likewise.
+	* libbfd.h (bfd_reloc_code_real_names): Likewise.
+	* reloc.c: Likewise.
+
+2021-05-06  Stafford Horne  <shorne@gmail.com>
+
 	PR 27624
 	* elf32-or1k.c (or1k_elf_adjust_dynamic_symbol): Change
 	condition used to cleanup plt entries to cleanup forced local
diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h
index d5780e4..7650522 100644
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@@ -5032,6 +5032,7 @@ then it may be truncated to 8 bits.  */
   BFD_RELOC_OR1K_TLS_TPOFF,
   BFD_RELOC_OR1K_TLS_DTPOFF,
   BFD_RELOC_OR1K_TLS_DTPMOD,
+  BFD_RELOC_OR1K_GOT_AHI16,
 
 /* H8 elf Relocations.  */
   BFD_RELOC_H8_DIR16A8,
diff --git a/bfd/elf32-or1k.c b/bfd/elf32-or1k.c
index cc6c512..1b8938d 100644
--- a/bfd/elf32-or1k.c
+++ b/bfd/elf32-or1k.c
@@ -808,6 +808,20 @@ static reloc_howto_type or1k_elf_howto_table[] =
 	 0,			/* Source Mask.  */
 	 0x03ffffff,		/* Dest Mask.  */
 	 true),			/* PC relative offset?  */
+
+  HOWTO (R_OR1K_GOT_AHI16,	/* type */
+	 16,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_OR1K_GOT_AHI16",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
 };
 
 /* Map BFD reloc types to Or1k ELF reloc types.  */
@@ -871,6 +885,7 @@ static const struct or1k_reloc_map or1k_reloc_map[] =
   { BFD_RELOC_OR1K_TLS_IE_LO13,	R_OR1K_TLS_IE_LO13 },
   { BFD_RELOC_OR1K_SLO13,	R_OR1K_SLO13 },
   { BFD_RELOC_OR1K_PLTA26,	R_OR1K_PLTA26 },
+  { BFD_RELOC_OR1K_GOT_AHI16,	R_OR1K_GOT_AHI16 },
 };
 
 /* tls_type is a mask used to track how each symbol is accessed,
@@ -1111,6 +1126,7 @@ or1k_final_link_relocate (reloc_howto_type *howto, bfd *input_bfd,
   switch (howto->type)
     {
     case R_OR1K_AHI16:
+    case R_OR1K_GOT_AHI16:
     case R_OR1K_GOTOFF_AHI16:
     case R_OR1K_TLS_IE_AHI16:
     case R_OR1K_TLS_LE_AHI16:
@@ -1373,6 +1389,7 @@ or1k_elf_relocate_section (bfd *output_bfd,
 	    }
 	  break;
 
+	case R_OR1K_GOT_AHI16:
 	case R_OR1K_GOT16:
 	case R_OR1K_GOT_PG21:
 	case R_OR1K_GOT_LO13:
@@ -1464,7 +1481,8 @@ or1k_elf_relocate_section (bfd *output_bfd,
 	    /* The GOT_PG21 and GOT_LO13 relocs are pc-relative,
 	       while the GOT16 reloc is GOT relative.  */
 	    relocation = got_base + off;
-	    if (r_type == R_OR1K_GOT16)
+	    if (r_type == R_OR1K_GOT16
+		|| r_type == R_OR1K_GOT_AHI16)
 	      relocation -= got_sym_value;
 
 	  /* Addend should be zero.  */
@@ -1990,6 +2008,7 @@ or1k_elf_check_relocs (bfd *abfd,
 	    }
 	  break;
 
+	case R_OR1K_GOT_AHI16:
 	case R_OR1K_GOT16:
 	case R_OR1K_GOT_PG21:
 	case R_OR1K_GOT_LO13:
diff --git a/bfd/libbfd.h b/bfd/libbfd.h
index f3a32fa..bbd3b0d 100644
--- a/bfd/libbfd.h
+++ b/bfd/libbfd.h
@@ -2774,6 +2774,7 @@ static const char *const bfd_reloc_code_real_names[] = { "@@uninitialized@@",
   "BFD_RELOC_OR1K_TLS_TPOFF",
   "BFD_RELOC_OR1K_TLS_DTPOFF",
   "BFD_RELOC_OR1K_TLS_DTPMOD",
+  "BFD_RELOC_OR1K_GOT_AHI16",
   "BFD_RELOC_H8_DIR16A8",
   "BFD_RELOC_H8_DIR16R8",
   "BFD_RELOC_H8_DIR24A8",
diff --git a/bfd/reloc.c b/bfd/reloc.c
index 674b075..6d920e1 100644
--- a/bfd/reloc.c
+++ b/bfd/reloc.c
@@ -6207,6 +6207,8 @@ ENUMX
 ENUMX
   BFD_RELOC_OR1K_GOTPC_LO16
 ENUMX
+  BFD_RELOC_OR1K_GOT_AHI16
+ENUMX
   BFD_RELOC_OR1K_GOT16
 ENUMX
   BFD_RELOC_OR1K_GOT_PG21