* elf64-x86-64.c (elf_x86_64_check_tls_transition): Allow

	64-bit -mcmodel=large -fpic TLS GD and LD sequences.
	(elf_x86_64_relocate_section): Handle -mcmodel=large -fpic
	TLS GD and LD sequences in GD->LE, GD->IE and LD->LE transitions.
ld/testsuite/
	* ld-x86-64/x86-64.exp: Add tlsld3, tlsgd7 and tlsgd8 tests.
	* ld-x86-64/tlspic1.s: Add -mcmodel=large -fpic TLS GD and LD
	sequences.
	* ld-x86-64/tlspic.dd: Adjusted.
	* ld-x86-64/tlspic.rd: Adjusted.
	* ld-x86-64/tlspic-nacl.rd: Adjusted.
	* ld-x86-64/tlsld3.dd: New test.
	* ld-x86-64/tlsld3.s: New file.
	* ld-x86-64/tlsgd7.dd: New test.
	* ld-x86-64/tlsgd7.s: New file.
	* ld-x86-64/tlsgd8.dd: New test.
	* ld-x86-64/tlsgd8.s: New file.

1 files changed, 104 insertions, 20 deletions

diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c
index 0da839a..a89485a 100644
--- a/bfd/elf64-x86-64.c
+++ b/bfd/elf64-x86-64.c
@@ -1089,6 +1089,7 @@ elf_x86_64_check_tls_transition (bfd *abfd,
 {
   unsigned int val;
   unsigned long r_symndx;
+  bfd_boolean largepic = FALSE;
   struct elf_link_hash_entry *h;
   bfd_vma offset;
   struct elf_x86_64_link_hash_table *htab;
@@ -1126,16 +1127,32 @@ elf_x86_64_check_tls_transition (bfd *abfd,
 	     can transit to different access model.  For 32bit, only
 		leaq foo@tlsgd(%rip), %rdi
 		.word 0x6666; rex64; call __tls_get_addr
-	     can transit to different access model.  */
+	     can transit to different access model.  For largepic
+	     we also support:
+	        leaq foo@tlsgd(%rip), %rdi
+	        movabsq $__tls_get_addr@pltoff, %rax
+	        addq $rbx, %rax
+	        call *%rax.  */
 
 	  static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 };
 	  static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
 
-	  if ((offset + 12) > sec->size
-	      || memcmp (contents + offset + 4, call, 4) != 0)
+	  if ((offset + 12) > sec->size)
 	    return FALSE;
 
-	  if (ABI_64_P (abfd))
+	  if (memcmp (contents + offset + 4, call, 4) != 0)
+	    {
+	      if (!ABI_64_P (abfd)
+		  || (offset + 19) > sec->size
+		  || offset < 3
+		  || memcmp (contents + offset - 3, leaq + 1, 3) != 0
+		  || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
+		  || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
+		     != 0)
+		return FALSE;
+	      largepic = TRUE;
+	    }
+	  else if (ABI_64_P (abfd))
 	    {
 	      if (offset < 4
 		  || memcmp (contents + offset - 4, leaq, 4) != 0)
@@ -1153,16 +1170,31 @@ elf_x86_64_check_tls_transition (bfd *abfd,
 	  /* Check transition from LD access model.  Only
 		leaq foo@tlsld(%rip), %rdi;
 		call __tls_get_addr
-	     can transit to different access model.  */
+	     can transit to different access model.  For largepic
+	     we also support:
+	        leaq foo@tlsld(%rip), %rdi
+	        movabsq $__tls_get_addr@pltoff, %rax
+	        addq $rbx, %rax
+	        call *%rax.  */
 
 	  static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
 
 	  if (offset < 3 || (offset + 9) > sec->size)
 	    return FALSE;
 
-	  if (memcmp (contents + offset - 3, lea, 3) != 0
-	      || 0xe8 != *(contents + offset + 4))
+	  if (memcmp (contents + offset - 3, lea, 3) != 0)
 	    return FALSE;
+
+	  if (0xe8 != *(contents + offset + 4))
+	    {
+	      if (!ABI_64_P (abfd)
+		  || (offset + 19) > sec->size
+		  || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
+		  || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
+		     != 0)
+		return FALSE;
+	      largepic = TRUE;
+	    }
 	}
 
       r_symndx = htab->r_sym (rel[1].r_info);
@@ -1174,8 +1206,10 @@ elf_x86_64_check_tls_transition (bfd *abfd,
 	 may be versioned.  */
       return (h != NULL
 	      && h->root.root.string != NULL
-	      && (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
-		  || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32)
+	      && (largepic
+		  ? ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64
+		  : (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
+		     || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32))
 	      && (strncmp (h->root.root.string,
 			   "__tls_get_addr", 14) == 0));
 
@@ -3949,8 +3983,26 @@ direct:
 		     .word 0x6666; rex64; call __tls_get_addr
 		     into:
 		     movl %fs:0, %eax
-		     leaq foo@tpoff(%rax), %rax */
-		  if (ABI_64_P (output_bfd))
+		     leaq foo@tpoff(%rax), %rax
+		     For largepic, change:
+		     leaq foo@tlsgd(%rip), %rdi
+		     movabsq $__tls_get_addr@pltoff, %rax
+		     addq %rbx, %rax
+		     call *%rax
+		     into:
+		     movq %fs:0, %rax
+		     leaq foo@tpoff(%rax), %rax
+		     nopw 0x0(%rax,%rax,1) */
+		  int largepic = 0;
+		  if (ABI_64_P (output_bfd)
+		      && contents[roff + 5] == (bfd_byte) '\xb8')
+		    {
+		      memcpy (contents + roff - 3,
+			      "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
+			      "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
+		      largepic = 1;
+		    }
+		  else if (ABI_64_P (output_bfd))
 		    memcpy (contents + roff - 4,
 			    "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
 			    16);
@@ -3960,8 +4012,8 @@ direct:
 			    15);
 		  bfd_put_32 (output_bfd,
 			      elf_x86_64_tpoff (info, relocation),
-			      contents + roff + 8);
-		  /* Skip R_X86_64_PC32/R_X86_64_PLT32.  */
+			      contents + roff + 8 + largepic);
+		  /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64.  */
 		  rel++;
 		  continue;
 		}
@@ -4196,8 +4248,26 @@ direct:
 		     .word 0x6666; rex64; call __tls_get_addr@plt
 		     into:
 		     movl %fs:0, %eax
-		     addq foo@gottpoff(%rip), %rax */
-		  if (ABI_64_P (output_bfd))
+		     addq foo@gottpoff(%rip), %rax
+		     For largepic, change:
+		     leaq foo@tlsgd(%rip), %rdi
+		     movabsq $__tls_get_addr@pltoff, %rax
+		     addq %rbx, %rax
+		     call *%rax
+		     into:
+		     movq %fs:0, %rax
+		     addq foo@gottpoff(%rax), %rax
+		     nopw 0x0(%rax,%rax,1) */
+		  int largepic = 0;
+		  if (ABI_64_P (output_bfd)
+		      && contents[roff + 5] == (bfd_byte) '\xb8')
+		    {
+		      memcpy (contents + roff - 3,
+			      "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
+			      "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
+		      largepic = 1;
+		    }
+		  else if (ABI_64_P (output_bfd))
 		    memcpy (contents + roff - 4,
 			    "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
 			    16);
@@ -4209,12 +4279,13 @@ direct:
 		  relocation = (htab->elf.sgot->output_section->vma
 				+ htab->elf.sgot->output_offset + off
 				- roff
+				- largepic
 				- input_section->output_section->vma
 				- input_section->output_offset
 				- 12);
 		  bfd_put_32 (output_bfd, relocation,
-			      contents + roff + 8);
-		  /* Skip R_X86_64_PLT32.  */
+			      contents + roff + 8 + largepic);
+		  /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64.  */
 		  rel++;
 		  continue;
 		}
@@ -4276,16 +4347,29 @@ direct:
 		 For 64bit, we change it into:
 		 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
 		 For 32bit, we change it into:
-		 nopl 0x0(%rax); movl %fs:0, %eax.  */
+		 nopl 0x0(%rax); movl %fs:0, %eax.
+		 For largepic, change:
+		 leaq foo@tlsgd(%rip), %rdi
+		 movabsq $__tls_get_addr@pltoff, %rax
+		 addq %rbx, %rax
+		 call *%rax
+		 into:
+		 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
+		 movq %fs:0, %eax */
 
 	      BFD_ASSERT (r_type == R_X86_64_TPOFF32);
-	      if (ABI_64_P (output_bfd))
+	      if (ABI_64_P (output_bfd)
+		  && contents[rel->r_offset + 5] == (bfd_byte) '\xb8')
+		memcpy (contents + rel->r_offset - 3,
+			"\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
+			"\x64\x48\x8b\x04\x25\0\0\0", 22);
+	      else if (ABI_64_P (output_bfd))
 		memcpy (contents + rel->r_offset - 3,
 			"\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
 	      else
 		memcpy (contents + rel->r_offset - 3,
 			"\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
-	      /* Skip R_X86_64_PC32/R_X86_64_PLT32.  */
+	      /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64.  */
 	      rel++;
 	      continue;
 	    }