[AArch64, ILP32] 3/6 Support for ELF32 relocs and refactor reloc handling

bfd/

	* bfd-in2.h: Re-generated.
	* elfnn-aarch64.c (HOWTO64, HOWTO32): New define.
	(IS_AARCH64_TLS_RELOC): Change to be based on the
	bfd reloc enumerators.
	(IS_AARCH64_TLSDESC_RELOC): Likewise.
	(PG, PG_OFFSET): Cast literal to bfd_vma.
	(elf64_aarch64_howto_table): Removed.
	(elf64_aarch64_howto_dynrelocs): Removed.
	(elf64_aarch64_tls_howto_table): Removed.
	(elf64_aarch64_tlsdesc_howto_table): Removed.
	(elfNN_aarch64_howto_table): New table to host all howto entires..
	(R_AARCH64_*): Replaced by AARCH64_R (*) and AARCH64_R_STR (*).
	(elfNN_aarch64_bfd_reloc_from_howto): New function.
	(elfNN_aarch64_bfd_reloc_from_type): Ditto.
	(struct elf_aarch64_reloc_map): New.
	(elf_aarch64_reloc_map): New table.
	(elfNN_aarch64_howto_from_bfd_reloc): New function.
	(elfNN_aarch64_howto_from_type): Update to look up the new table
	elfNN_aarch64_howto_table.
	(struct elf64_aarch64_reloc_map): Remove.
	(elf64_aarch64_reloc_map): Remove.
	(elfNN_aarch64_reloc_type_lookup): Change to call
	elfNN_aarch64_howto_from_bfd_reloc.
	(elfNN_aarch64_reloc_name_lookup): Change to look up the new table
	elfNN_aarch64_howto_table.
	(aarch64_resolve_relocation): Refactor to switch on the bfd
	reloc enumerators.
	(bfd_elf_aarch64_put_addend): Likewise.
	(elfNN_aarch64_final_link_relocate): Likewise.
	(aarch64_tls_transition_without_check): Likewise.
	(aarch64_reloc_got_type): Likewise.
	(aarch64_can_relax_tls): Likewise.
	(aarch64_tls_transition): Likewise.
	(elfNN_aarch64_tls_relax): Likewise.
	(elfNN_aarch64_final_link_relocate): Likewise.
	(elfNN_aarch64_relocate_section): Likewise.
	(elfNN_aarch64_gc_sweep_hook): Likewise.
	(elfNN_aarch64_check_relocs): Likewise.
	(aarch64_tls_transition): Change to return a bfd reloc enumerator.
	* libbfd.h: Re-generated.
	* reloc.c: Re-order the AArch64 bfd reloc enumerators.
	(BFD_RELOC_AARCH64_RELOC_START)
	(BFD_RELOC_AARCH64_RELOC_END)
	(BFD_RELOC_AARCH64_LD_GOT_LO12_NC)
	(BFD_RELOC_AARCH64_LD32_GOT_LO12_NC)
	(BFD_RELOC_AARCH64_TLSDESC_LD_LO12_NC)
	(BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC)
	(BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_LO12_NC)
	(BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC)
	(BFD_RELOC_AARCH64_IRELATIVE): New relocs.

gas/

	* config/tc-aarch64.c (reloc_table): Replace
	BFD_RELOC_AARCH64_LD64_GOT_LO12_NC with
	BFD_RELOC_AARCH64_LD_GOT_LO12_NC; likewise to
	BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC and
	BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_LO12_NC.
	(md_apply_fix): Handle BFD_RELOC_AARCH64_LD_GOT_LO12_NC,
	BFD_RELOC_AARCH64_LD32_GOT_LO12_NC,
	BFD_RELOC_AARCH64_TLSDESC_LD_LO12_NC,
	BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC,
	BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_LO12_NC and
	BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC.
	(aarch64_force_relocation): Likewise.

gas/testsuite/

	* gas/aarch64/ilp32-basic.d: New file.
	* gas/aarch64/ilp32-basic.s: New file.

include/elf/

	* aarch64.h: Add ELF32 reloc codes and remove fake ELF64 ones.
	(R_AARCH64_IRELATIVE): New reloc.

5 files changed, 108 insertions, 3 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 5270688..d998e3b 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,5 +1,20 @@
 2013-06-26  Yufeng Zhang  <yufeng.zhang@arm.com>
 
+	* config/tc-aarch64.c (reloc_table): Replace
+	BFD_RELOC_AARCH64_LD64_GOT_LO12_NC with
+	BFD_RELOC_AARCH64_LD_GOT_LO12_NC; likewise to
+	BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC and
+	BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_LO12_NC.
+	(md_apply_fix): Handle BFD_RELOC_AARCH64_LD_GOT_LO12_NC,
+	BFD_RELOC_AARCH64_LD32_GOT_LO12_NC,
+	BFD_RELOC_AARCH64_TLSDESC_LD_LO12_NC,
+	BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC,
+	BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_LO12_NC and
+	BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC.
+	(aarch64_force_relocation): Likewise.
+
+2013-06-26  Yufeng Zhang  <yufeng.zhang@arm.com>
+
 	* config/tc-aarch64.c (ilp32_p): New static variable.
 	(elf64_aarch64_target_format): Return the target according to the
 	value of 'ilp32_p'.
diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index 239b9ee..52811ef 100644
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -2377,7 +2377,7 @@ static struct reloc_table_entry reloc_table[] = {
    0,
    0,
    0,
-   BFD_RELOC_AARCH64_LD64_GOT_LO12_NC},
+   BFD_RELOC_AARCH64_LD_GOT_LO12_NC},
 
   /* Get to the page containing GOT TLS entry for a symbol */
   {"tlsgd", 0,
@@ -2405,7 +2405,7 @@ static struct reloc_table_entry reloc_table[] = {
    0,
    0,
    BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC,
-   BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC},
+   BFD_RELOC_AARCH64_TLSDESC_LD_LO12_NC},
 
   /* Get to the page containing GOT TLS entry for a symbol */
   {"gottprel", 0,
@@ -2419,7 +2419,7 @@ static struct reloc_table_entry reloc_table[] = {
    0,
    0,
    0,
-   BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC},
+   BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_LO12_NC},
 
   /* Get tp offset for a symbol.  */
   {"tprel", 0,
@@ -6506,10 +6506,33 @@ md_apply_fix (fixS * fixP, valueT * valP, segT seg)
 	}
       break;
 
+    case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_LO12_NC:
+      fixP->fx_r_type = (ilp32_p
+			 ? BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
+			 : BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC);
+      S_SET_THREAD_LOCAL (fixP->fx_addsy);
+      /* Should always be exported to object file, see
+	 aarch64_force_relocation().  */
+      gas_assert (!fixP->fx_done);
+      gas_assert (seg->use_rela_p);
+      break;
+
+    case BFD_RELOC_AARCH64_TLSDESC_LD_LO12_NC:
+      fixP->fx_r_type = (ilp32_p
+			 ? BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
+			 : BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC);
+      S_SET_THREAD_LOCAL (fixP->fx_addsy);
+      /* Should always be exported to object file, see
+	 aarch64_force_relocation().  */
+      gas_assert (!fixP->fx_done);
+      gas_assert (seg->use_rela_p);
+      break;
+
     case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
     case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
     case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
     case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
+    case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
     case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
     case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
     case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
@@ -6521,6 +6544,7 @@ md_apply_fix (fixS * fixP, valueT * valP, segT seg)
     case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
     case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
     case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
+    case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
       S_SET_THREAD_LOCAL (fixP->fx_addsy);
       /* Should always be exported to object file, see
 	 aarch64_force_relocation().  */
@@ -6528,6 +6552,16 @@ md_apply_fix (fixS * fixP, valueT * valP, segT seg)
       gas_assert (seg->use_rela_p);
       break;
 
+    case BFD_RELOC_AARCH64_LD_GOT_LO12_NC:
+      /* Should always be exported to object file, see
+	 aarch64_force_relocation().  */
+      fixP->fx_r_type = (ilp32_p
+			 ? BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
+			 : BFD_RELOC_AARCH64_LD64_GOT_LO12_NC);
+      gas_assert (!fixP->fx_done);
+      gas_assert (seg->use_rela_p);
+      break;
+
     case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
     case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
     case BFD_RELOC_AARCH64_ADD_LO12:
@@ -6539,6 +6573,7 @@ md_apply_fix (fixS * fixP, valueT * valP, segT seg)
     case BFD_RELOC_AARCH64_GOT_LD_PREL19:
     case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
     case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
+    case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
       /* Should always be exported to object file, see
 	 aarch64_force_relocation().  */
       gas_assert (!fixP->fx_done);
@@ -6669,10 +6704,18 @@ aarch64_force_relocation (struct fix *fixp)
          even if the symbol is extern or weak.  */
       return 0;
 
+    case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_LO12_NC:
+    case BFD_RELOC_AARCH64_TLSDESC_LD_LO12_NC:
+    case BFD_RELOC_AARCH64_LD_GOT_LO12_NC:
+      /* Pseudo relocs that need to be fixed up according to
+	 ilp32_p.  */
+      return 0;
+
     case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
     case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
     case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
     case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
+    case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
     case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
     case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
     case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
@@ -6684,8 +6727,10 @@ aarch64_force_relocation (struct fix *fixp)
     case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
     case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
     case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
+    case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
     case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
     case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
+    case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
     case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
     case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
     case BFD_RELOC_AARCH64_ADD_LO12:
diff --git a/gas/testsuite/ChangeLog b/gas/testsuite/ChangeLog
index 6a31de7..e309d0e 100644
--- a/gas/testsuite/ChangeLog
+++ b/gas/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2013-06-26  Yufeng Zhang  <yufeng.zhang@arm.com>
+
+	* gas/aarch64/ilp32-basic.d: New file.
+	* gas/aarch64/ilp32-basic.s: New file.
+
 2013-06-25  Maciej W. Rozycki  <macro@codesourcery.com>
 
 	* gas/mips/micromips-insn32.d: New test.
diff --git a/gas/testsuite/gas/aarch64/ilp32-basic.d b/gas/testsuite/gas/aarch64/ilp32-basic.d
new file mode 100644
index 0000000..b876c7a
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/ilp32-basic.d
@@ -0,0 +1,23 @@
+#as: -milp32
+#objdump: -dr
+
+.*:     file format elf32-.*aarch64
+
+
+Disassembly of section \.text:
+
+00000000 <.*>:
+   0:	90000004 	adrp	x4, c <.*>
+			0: R_AARCH64_P32_ADR_PREL_PG_HI21	ptrs
+   4:	91000083 	add	x3, x4, #0x0
+			4: R_AARCH64_P32_ADD_ABS_LO12_NC	ptrs
+   8:	b9000080 	str	w0, \[x4\]
+			8: R_AARCH64_P32_LDST32_ABS_LO12_NC	ptrs
+   c:	b9000461 	str	w1, \[x3,#4\]
+  10:	b9000862 	str	w2, \[x3,#8\]
+  14:	90000004 	adrp	x4, c <.*>
+			14: R_AARCH64_P32_ADR_GOT_PAGE	ptrs
+  18:	f9400083 	ldr	x3, \[x4\]
+			18: R_AARCH64_P32_LD32_GOT_LO12_NC	ptrs
+  1c:	2a0403e0 	mov	w0, w4
+  20:	d65f03c0 	ret
diff --git a/gas/testsuite/gas/aarch64/ilp32-basic.s b/gas/testsuite/gas/aarch64/ilp32-basic.s
new file mode 100644
index 0000000..790dcdf
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/ilp32-basic.s
@@ -0,0 +1,17 @@
+	.cpu generic
+	.text
+	.align	2
+	.global	foo
+	.type	foo, %function
+foo:
+	adrp	x4, ptrs
+	add	x3, x4, :lo12:ptrs
+	str	w0, [x4,#:lo12:ptrs]
+	str	w1, [x3,4]
+	str	w2, [x3,8]
+	adrp	x4, :got:ptrs
+	ldr	x3, [x4,#:got_lo12:ptrs]
+	mov	w0, w4
+	ret
+	.size	foo, .-foo
+	.comm	ptrs,12,8