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MIPS16/GAS: Improve disallowed relocation operand error diagnostics 

Improve disallowed relocation operand error diagnostics for MIPS16 code
and make it match corresponding regular MIPS and microMIPS handling,
e.g:

$ cat sltu.s
	sltu	$2, %lo(foo)
$ as -o sltu.o sltu.s
sltu.s: Assembler messages:
sltu.s:1: Error: operand 2 must be constant `sltu $2,%lo(foo)'
$ as -mips16 -o sltu.o sltu.s
sltu.s: Assembler messages:
sltu.s:1: Error: invalid operands `sltu $2,%lo(foo)'
$

To do so call `match_not_constant' from `match_mips16_insn' whenever a
disallowed relocation operation has been noticed, like `match_const_int'
does, making reporting consistent:

$ as -mips16 -o sltu.o sltu.s
sltu.s: Assembler messages:
sltu.s:1: Error: operand 2 must be constant `sltu $2,%lo(foo)'
$

	gas/
	* config/tc-mips.c (match_mips16_insn): Call
	`match_not_constant' for a disallowed relocation operation.
	* testsuite/gas/mips/mips16-reloc-error.d: New test.
	* testsuite/gas/mips/mips16-reloc-error.l: New stderr output.
	* testsuite/gas/mips/mips16-reloc-error.s: New test source.
	* testsuite/gas/mips/mips.exp: Run the new test.
This commit is contained in:
Maciej W. Rozycki 2017-05-15 13:09:37 +01:00
parent c76081bc87
commit e295202f60
6 changed files with 98 additions and 1 deletions
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9
gas/ChangeLog
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@ -1,3 +1,12 @@
2017-05-15 Maciej W. Rozycki <macro@imgtec.com>
* config/tc-mips.c (match_mips16_insn): Call
`match_not_constant' for a disallowed relocation operation.
* testsuite/gas/mips/mips16-reloc-error.d: New test.
* testsuite/gas/mips/mips16-reloc-error.l: New stderr output.
* testsuite/gas/mips/mips16-reloc-error.s: New test source.
* testsuite/gas/mips/mips.exp: Run the new test.
2017-05-15 Maciej W. Rozycki <macro@imgtec.com>
* testsuite/gas/mips/lui-1.d: New test.

5
gas/config/tc-mips.c
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@ -8259,7 +8259,10 @@ match_mips16_insn (struct mips_cl_insn *insn, const struct mips_opcode *opcode,
been allowed to take relocation operators. */
if (offset_reloc[0] != BFD_RELOC_UNUSED
&& (ext_operand->size != 16 || c == '8'))
return FALSE;
{
match_not_constant (&arg);
return FALSE;
}
relax_char = c;
continue;

2
gas/testsuite/gas/mips/mips.exp
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@ -967,6 +967,8 @@ if { [istarget mips*-*-vxworks*] } {
run_dump_test "mips16-hilo-n32"
}
run_dump_test "mips16-hilo-match"
run_dump_test "mips16-reloc-error"
run_dump_test "delay"
run_dump_test "nodelay"
run_dump_test "mips4010"

3
gas/testsuite/gas/mips/mips16-reloc-error.d Normal file
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@ -0,0 +1,3 @@
#name: MIPS16 relocation errors
#as: -32 -mips64r2
#error-output: mips16-reloc-error.l

28
gas/testsuite/gas/mips/mips16-reloc-error.l Normal file
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@ -0,0 +1,28 @@
.*: Assembler messages:
.*:11: Error: operand 3 must be constant `addiu \$3,\$2,%lo\(bar\)'
.*:12: Error: operand 3 must be constant `daddiu \$3,\$2,%lo\(bar\)'
.*:14: Error: operand 2 must be constant `slti \$3,%lo\(bar\)'
.*:15: Error: operand 2 must be constant `sltiu \$3,%lo\(bar\)'
.*:17: Error: operand 3 must be constant `sll \$3,\$2,%lo\(bar\)'
.*:18: Error: operand 3 must be constant `sra \$3,\$2,%lo\(bar\)'
.*:19: Error: operand 3 must be constant `srl \$3,\$2,%lo\(bar\)'
.*:20: Error: operand 3 must be constant `dsll \$3,\$2,%lo\(bar\)'
.*:21: Error: operand 2 must be constant `dsra \$3,%lo\(bar\)'
.*:22: Error: operand 2 must be constant `dsrl \$3,%lo\(bar\)'
.*:24: Error: operand 1 must be constant `break %lo\(bar\)'
.*:25: Error: operand 1 must be constant `sdbbp %lo\(bar\)'
.*:27: Error: invalid operands `b %lo\(bar\)'
.*:28: Error: invalid operands `beqz \$3,%lo\(bar\)'
.*:29: Error: invalid operands `bnez \$3,%lo\(bar\)'
.*:30: Error: invalid operands `bteqz %lo\(bar\)'
.*:31: Error: invalid operands `btnez %lo\(bar\)'
.*:33: Error: invalid operands `jal %lo\(bar\)'
.*:34: Error: invalid operands `jalx %lo\(bar\)'
.*:36: Error: operand 3 must be constant `save \$31,\$16,%lo\(bar\)'
.*:37: Error: operand 3 must be constant `restore \$31,\$16,%lo\(bar\)'
.*:39: Error: operand 6 must be constant `asmacro 0,0,0,0,0,%lo\(bar\)'
.*:40: Error: operand 5 must be constant `asmacro 0,0,0,0,%lo\(bar\),0'
.*:41: Error: operand 4 must be constant `asmacro 0,0,0,%lo\(bar\),0,0'
.*:42: Error: operand 3 must be constant `asmacro 0,0,%lo\(bar\),0,0,0'
.*:43: Error: operand 2 must be constant `asmacro 0,%lo\(bar\),0,0,0,0'
.*:44: Error: operand 1 must be constant `asmacro %lo\(bar\),0,0,0,0,0'

52
gas/testsuite/gas/mips/mips16-reloc-error.s Normal file
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@ -0,0 +1,52 @@
.text
.set bar, 8
.ent foo
.set mips16
foo:
li $2, %hi(bar)
sll $2, $2, 16
addiu $3, $2, %lo(bar)
daddiu $3, $2, %lo(bar)
slti $3, %lo(bar)
sltiu $3, %lo(bar)
sll $3, $2, %lo(bar)
sra $3, $2, %lo(bar)
srl $3, $2, %lo(bar)
dsll $3, $2, %lo(bar)
dsra $3, %lo(bar)
dsrl $3, %lo(bar)
break %lo(bar)
sdbbp %lo(bar)
b %lo(bar)
beqz $3, %lo(bar)
bnez $3, %lo(bar)
bteqz %lo(bar)
btnez %lo(bar)
jal %lo(bar)
jalx %lo(bar)
save $31, $16, %lo(bar)
restore $31, $16, %lo(bar)
asmacro 0, 0, 0, 0, 0, %lo(bar)
asmacro 0, 0, 0, 0, %lo(bar), 0
asmacro 0, 0, 0, %lo(bar), 0, 0
asmacro 0, 0, %lo(bar), 0, 0, 0
asmacro 0, %lo(bar), 0, 0, 0, 0
asmacro %lo(bar), 0, 0, 0, 0, 0
nop
.set nomips16
.end foo
# Force some (non-delay-slot) zero bytes, to make 'objdump' print ...
.align 4, 0
.space 16