MIPS/GAS: Treat local jump relocs the same no matter if REL or RELA

Do not convert jump relocs against local MIPS16 or microMIPS symbols to
refer to a section symbol instead even on RELA targets, as it makes it
impossible for the linker to make a JAL to JALX conversion based on ISA
symbol annotation, breaking regular and compressed MIPS interlinking.

	gas/
	* config/tc-mips.c (mips_fix_adjustable): Also return 0 for
	jump relocations against MIPS16 or microMIPS symbols on RELA
	targets.
	* testsuite/gas/mips/jalx-local.d: New test.
	* testsuite/gas/mips/jalx-local-n32.d: New test.
	* testsuite/gas/mips/jalx-local-n64.d: New test.
	* testsuite/gas/mips/jalx-local.s: New test source.
	* testsuite/gas/mips/mips.exp: Run the new tests.

	ld/
	* testsuite/ld-mips-elf/jalx-local.d: New test.
	* testsuite/ld-mips-elf/jalx-local-n32.d: New test.
	* testsuite/ld-mips-elf/jalx-local-n64.d: New test.
	* testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 8cf0a50..03f3319 100644 (file)
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,4 +1,15 @@
 2016-05-24  Maciej W. Rozycki  <macro@imgtec.com>
+    
+       * config/tc-mips.c (mips_fix_adjustable): Also return 0 for
+       jump relocations against MIPS16 or microMIPS symbols on RELA
+       targets.
+       * testsuite/gas/mips/jalx-local.d: New test.
+       * testsuite/gas/mips/jalx-local-n32.d: New test.
+       * testsuite/gas/mips/jalx-local-n64.d: New test.
+       * testsuite/gas/mips/jalx-local.s: New test source.
+       * testsuite/gas/mips/mips.exp: Run the new tests.
+
+2016-05-24  Maciej W. Rozycki  <macro@imgtec.com>
 
        * config/tc-mips.c (md_apply_fix)
        <BFD_RELOC_MIPS16_TLS_TPREL_LO16>: Remove fall-through, adjust

diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c
index 82bd830..2e8be58 100644 (file)
--- a/gas/config/tc-mips.c
+++ b/gas/config/tc-mips.c
@@ -17165,9 +17165,9 @@ mips_fix_adjustable (fixS *fixp)
      There is a further restriction:
 
        5. We cannot reduce jump relocations (R_MIPS_26, R_MIPS16_26 or
-         R_MICROMIPS_26_S1) against MIPS16 or microMIPS symbols on
-         targets with in-place addends; the relocation field cannot
-         encode the low bit.
+         R_MICROMIPS_26_S1) against MIPS16 or microMIPS symbols because
+         we need to keep the MIPS16 or microMIPS symbol for the purpose
+         of converting JAL to JALX instructions in the linker.
 
      For simplicity, we deal with (3)-(4) by not reducing _any_ relocation
      against a MIPS16 symbol.  We deal with (5) by by not reducing any
@@ -17182,10 +17182,9 @@ mips_fix_adjustable (fixS *fixp)
      that we have for MIPS16 symbols.  */
   if (fixp->fx_subsy == NULL
       && (ELF_ST_IS_MIPS16 (S_GET_OTHER (fixp->fx_addsy))
-         || *symbol_get_tc (fixp->fx_addsy)
-         || (HAVE_IN_PLACE_ADDENDS
-             && ELF_ST_IS_MICROMIPS (S_GET_OTHER (fixp->fx_addsy))
-             && jmp_reloc_p (fixp->fx_r_type))))
+         || (ELF_ST_IS_MICROMIPS (S_GET_OTHER (fixp->fx_addsy))
+             && jmp_reloc_p (fixp->fx_r_type))
+         || *symbol_get_tc (fixp->fx_addsy)))
     return 0;
 
   return 1;

diff --git a/gas/testsuite/gas/mips/jalx-local-n32.d b/gas/testsuite/gas/mips/jalx-local-n32.d
new file mode 100644 (file)
index 0000000..5db4ddb
--- /dev/null
+++ b/gas/testsuite/gas/mips/jalx-local-n32.d
@@ -0,0 +1,29 @@
+#objdump: -dr --prefix-addresses --show-raw-insn
+#name: MIPS JALX local symbol relocation (n32)
+#as: -n32 -march=from-abi
+#source: jalx-local.s
+
+.*: +file format .*mips.*
+
+Disassembly of section \.text:
+       \.\.\.
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> f400 0000    jal     00000000 <foo-0x1000>
+[      ]*[0-9a-f]+: R_MICROMIPS_26_S1  \.text\+0x1020
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> f000 0000    jalx    00000000 <foo-0x1000>
+[      ]*[0-9a-f]+: R_MICROMIPS_26_S1  \.text\+0x1020
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> 001f 0f3c    jr      ra
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> 0000 0000    nop
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+[0-9a-f]+ <[^>]*> 0c000000     jal     00000000 <foo-0x1000>
+[      ]*[0-9a-f]+: R_MIPS_26  foo
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+[0-9a-f]+ <[^>]*> 74000000     jalx    00000000 <foo-0x1000>
+[      ]*[0-9a-f]+: R_MIPS_26  foo
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+[0-9a-f]+ <[^>]*> 03e00009     jalr    zero,ra
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+       \.\.\.

diff --git a/gas/testsuite/gas/mips/jalx-local-n64.d b/gas/testsuite/gas/mips/jalx-local-n64.d
new file mode 100644 (file)
index 0000000..6e592f8
--- /dev/null
+++ b/gas/testsuite/gas/mips/jalx-local-n64.d
@@ -0,0 +1,37 @@
+#objdump: -dr --prefix-addresses --show-raw-insn
+#name: MIPS JALX local symbol relocation (n64)
+#as: -64 -march=from-abi
+#source: jalx-local.s
+
+.*: +file format .*mips.*
+
+Disassembly of section \.text:
+       \.\.\.
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> f400 0000    jal     0000000000000000 <foo-0x1000>
+[      ]*[0-9a-f]+: R_MICROMIPS_26_S1  \.text\+0x1020
+[      ]*[0-9a-f]+: R_MIPS_NONE        \*ABS\*\+0x1020
+[      ]*[0-9a-f]+: R_MIPS_NONE        \*ABS\*\+0x1020
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> f000 0000    jalx    0000000000000000 <foo-0x1000>
+[      ]*[0-9a-f]+: R_MICROMIPS_26_S1  \.text\+0x1020
+[      ]*[0-9a-f]+: R_MIPS_NONE        \*ABS\*\+0x1020
+[      ]*[0-9a-f]+: R_MIPS_NONE        \*ABS\*\+0x1020
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> 001f 0f3c    jr      ra
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> 0000 0000    nop
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+[0-9a-f]+ <[^>]*> 0c000000     jal     0000000000000000 <foo-0x1000>
+[      ]*[0-9a-f]+: R_MIPS_26  foo
+[      ]*[0-9a-f]+: R_MIPS_NONE        \*ABS\*
+[      ]*[0-9a-f]+: R_MIPS_NONE        \*ABS\*
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+[0-9a-f]+ <[^>]*> 74000000     jalx    0000000000000000 <foo-0x1000>
+[      ]*[0-9a-f]+: R_MIPS_26  foo
+[      ]*[0-9a-f]+: R_MIPS_NONE        \*ABS\*
+[      ]*[0-9a-f]+: R_MIPS_NONE        \*ABS\*
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+[0-9a-f]+ <[^>]*> 03e00009     jalr    zero,ra
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+       \.\.\.

diff --git a/gas/testsuite/gas/mips/jalx-local.d b/gas/testsuite/gas/mips/jalx-local.d
new file mode 100644 (file)
index 0000000..e380160
--- /dev/null
+++ b/gas/testsuite/gas/mips/jalx-local.d
@@ -0,0 +1,28 @@
+#objdump: -dr --prefix-addresses --show-raw-insn
+#name: MIPS JALX local symbol relocation
+#as: -32
+
+.*: +file format .*mips.*
+
+Disassembly of section \.text:
+       \.\.\.
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> f400 0810    jal     00001020 <bar>
+[      ]*[0-9a-f]+: R_MICROMIPS_26_S1  \.text
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> f000 0408    jalx    00001020 <bar>
+[      ]*[0-9a-f]+: R_MICROMIPS_26_S1  \.text
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> 001f 0f3c    jr      ra
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> 0000 0000    nop
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+[0-9a-f]+ <[^>]*> 0c000000     jal     00000000 <foo-0x1000>
+[      ]*[0-9a-f]+: R_MIPS_26  foo
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+[0-9a-f]+ <[^>]*> 74000000     jalx    00000000 <foo-0x1000>
+[      ]*[0-9a-f]+: R_MIPS_26  foo
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+[0-9a-f]+ <[^>]*> 03e00009     jalr    zero,ra
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+       \.\.\.

diff --git a/gas/testsuite/gas/mips/jalx-local.s b/gas/testsuite/gas/mips/jalx-local.s
new file mode 100644 (file)
index 0000000..fc345f6
--- /dev/null
+++ b/gas/testsuite/gas/mips/jalx-local.s
@@ -0,0 +1,33 @@
+       .text
+       .set    noreorder
+       .space  0x1000
+
+       .align  4
+       .set    micromips
+       .ent    foo
+foo:
+       nor     $0, $0
+       jal     bar
+        nor    $0, $0
+       jalx    bar
+        nor    $0, $0
+       jalr    $0, $ra
+        nor    $0, $0
+       .end    foo
+
+       .align  4
+       .set    nomicromips
+       .ent    bar
+bar:
+       nor     $0, $0
+       jal     foo
+        nor    $0, $0
+       jalx    foo
+        nor    $0, $0
+       jalr    $0, $ra
+        nor    $0, $0
+       .end    bar
+
+# Force some (non-delay-slot) zero bytes, to make 'objdump' print ...
+       .align  4, 0
+       .space  16

diff --git a/gas/testsuite/gas/mips/mips.exp b/gas/testsuite/gas/mips/mips.exp
index 1b1ac02..f5ed674 100644 (file)
--- a/gas/testsuite/gas/mips/mips.exp
+++ b/gas/testsuite/gas/mips/mips.exp
@@ -796,11 +796,14 @@ if { [istarget mips*-*-vxworks*] } {
     run_dump_test "mips-jalx-2"
     run_dump_test "jalx-imm"
     run_dump_test "jalx-addend"
+    run_dump_test "jalx-local"
     if $has_newabi {
        run_dump_test "jalx-imm-n32"
        run_dump_test "jalx-addend-n32"
+       run_dump_test "jalx-local-n32"
        run_dump_test "jalx-imm-n64"
        run_dump_test "jalx-addend-n64"
+       run_dump_test "jalx-local-n64"
     }
     # Check MIPS16 HI16/LO16 relocations
     run_dump_test "mips16-hilo"

diff --git a/ld/ChangeLog b/ld/ChangeLog
index 6509f33..aaab50d 100644 (file)
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,10 @@
+2016-05-24  Maciej W. Rozycki  <macro@imgtec.com>
+    
+       * testsuite/ld-mips-elf/jalx-local.d: New test.
+       * testsuite/ld-mips-elf/jalx-local-n32.d: New test.
+       * testsuite/ld-mips-elf/jalx-local-n64.d: New test.
+       * testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
+
 2016-05-23  Kuba Sejdak  <jakub.sejdak@phoesys.com>
 
        * Makefile.am: Add earmelf_phoenix.c.

diff --git a/ld/testsuite/ld-mips-elf/jalx-local-n32.d b/ld/testsuite/ld-mips-elf/jalx-local-n32.d
new file mode 100644 (file)
index 0000000..b5615b9
--- /dev/null
+++ b/ld/testsuite/ld-mips-elf/jalx-local-n32.d
@@ -0,0 +1,6 @@
+#name: MIPS JALX to local symbol (n32)
+#source: ../../../gas/testsuite/gas/mips/jalx-local.s
+#as: -EB -n32 -march=from-abi
+#ld: -EB -Ttext 0x1c000000 -e 0x1c000000
+#objdump: -dr --prefix-addresses --show-raw-insn
+#dump: jalx-local.d

diff --git a/ld/testsuite/ld-mips-elf/jalx-local-n64.d b/ld/testsuite/ld-mips-elf/jalx-local-n64.d
new file mode 100644 (file)
index 0000000..3a18363
--- /dev/null
+++ b/ld/testsuite/ld-mips-elf/jalx-local-n64.d
@@ -0,0 +1,6 @@
+#name: MIPS JALX to local symbol (n64)
+#source: ../../../gas/testsuite/gas/mips/jalx-local.s
+#as: -EB -64 -march=from-abi
+#ld: -EB -Ttext 0x1c000000 -e 0x1c000000
+#objdump: -dr --prefix-addresses --show-raw-insn
+#dump: jalx-local.d

diff --git a/ld/testsuite/ld-mips-elf/jalx-local.d b/ld/testsuite/ld-mips-elf/jalx-local.d
new file mode 100644 (file)
index 0000000..0453858
--- /dev/null
+++ b/ld/testsuite/ld-mips-elf/jalx-local.d
@@ -0,0 +1,26 @@
+#name: MIPS JALX to local symbol
+#source: ../../../gas/testsuite/gas/mips/jalx-local.s
+#as: -EB -32
+#ld: -EB -Ttext 0x1c000000 -e 0x1c000000
+#objdump: -dr --prefix-addresses --show-raw-insn
+
+.*: +file format .*mips.*
+
+Disassembly of section \.text:
+       \.\.\.
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> f300 0408    jalx    0*1c001020 <.*>
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> f300 0408    jalx    0*1c001020 <.*>
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> 001f 0f3c    jr      ra
+[0-9a-f]+ <[^>]*> 0000 02d0    not     zero,zero
+[0-9a-f]+ <[^>]*> 0000 0000    nop
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+[0-9a-f]+ <[^>]*> 77000400     jalx    0*1c001000 <.*>
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+[0-9a-f]+ <[^>]*> 77000400     jalx    0*1c001000 <.*>
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+[0-9a-f]+ <[^>]*> 03e00009     jalr    zero,ra
+[0-9a-f]+ <[^>]*> 00000027     nor     zero,zero,zero
+       \.\.\.

diff --git a/ld/testsuite/ld-mips-elf/mips-elf.exp b/ld/testsuite/ld-mips-elf/mips-elf.exp
index 741f2e2..615f173 100644 (file)
--- a/ld/testsuite/ld-mips-elf/mips-elf.exp
+++ b/ld/testsuite/ld-mips-elf/mips-elf.exp
@@ -169,9 +169,12 @@ if { $linux_gnu } {
 }
 
 run_dump_test "jalx-addend" [list [list ld $abi_ldflags(o32)]]
+run_dump_test "jalx-local" [list [list ld $abi_ldflags(o32)]]
 if $has_newabi {
     run_dump_test "jalx-addend-n32" [list [list ld $abi_ldflags(n32)]]
+    run_dump_test "jalx-local-n32" [list [list ld $abi_ldflags(n32)]]
     run_dump_test "jalx-addend-n64" [list [list ld $abi_ldflags(n64)]]
+    run_dump_test "jalx-local-n64" [list [list ld $abi_ldflags(n64)]]
 }
 
 # Test multi-got link.  We only do this on GNU/Linux because it requires