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MIPS/GAS: Improve bignum operand error diagnostics 

Improve bignum operand error diagnostics for cases where a constant
would be accepted and report them as range errors, also indicating the
offending operand and instruction, e.g.:

$ cat bignum.s
	addiu	$2, 0x10000000000000000
	break	0x10000000000000000
$ as -o bignum.o bignum.s
bignum.s:1: Error: bignum invalid
bignum.s:2: Error: operand 1 must be constant `break 0x10000000000000000'
$

now show as:

$ as -o bignum.o bignum.s
bignum.s:1: Error: operand 2 out of range `addiu $2,0x10000000000000000'
bignum.s:2: Error: operand 1 out of range `break 0x10000000000000000'
$

	gas/
	* config/tc-mips.c (match_const_int): Call `match_out_of_range'
	rather than `match_not_constant' for unrelocated operands
	retrieved as an `O_big' expression.
	(match_int_operand): Call `match_out_of_range' for relocatable
	operands retrieved as an `O_big' expression.
	(match_mips16_insn): Call `match_out_of_range' for relaxable
	operands retrieved as an `O_big' expression.
	* testsuite/gas/mips/addiu-error.d: New test.
	* testsuite/gas/mips/mips16@addiu-error.d: New test.
	* testsuite/gas/mips/micromips@addiu-error.d: New test.
	* testsuite/gas/mips/break-error.d: New test.
	* testsuite/gas/mips/lui-1.l: Adjust error message.
	* testsuite/gas/mips/addiu-error.l: New stderr output.
	* testsuite/gas/mips/mips16@addiu-error.l: New stderr output.
	* testsuite/gas/mips/micromips@addiu-error.l: New stderr output.
	* testsuite/gas/mips/break-error.l: New stderr output.
	* testsuite/gas/mips/addiu-error.s: New test source.
	* testsuite/gas/mips/break-error.s: New test source.
	* testsuite/gas/mips/mips.exp: Run the new tests.
This commit is contained in:
Maciej W. Rozycki 2017-05-15 13:17:18 +01:00
parent 1a7bf198b6
commit c96425c560
14 changed files with 109 additions and 2 deletions
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22
gas/ChangeLog
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@ -1,3 +1,25 @@
2017-05-15 Maciej W. Rozycki <macro@imgtec.com>
* config/tc-mips.c (match_const_int): Call `match_out_of_range'
rather than `match_not_constant' for unrelocated operands
retrieved as an `O_big' expression.
(match_int_operand): Call `match_out_of_range' for relocatable
operands retrieved as an `O_big' expression.
(match_mips16_insn): Call `match_out_of_range' for relaxable
operands retrieved as an `O_big' expression.
* testsuite/gas/mips/addiu-error.d: New test.
* testsuite/gas/mips/mips16@addiu-error.d: New test.
* testsuite/gas/mips/micromips@addiu-error.d: New test.
* testsuite/gas/mips/break-error.d: New test.
* testsuite/gas/mips/lui-1.l: Adjust error message.
* testsuite/gas/mips/addiu-error.l: New stderr output.
* testsuite/gas/mips/mips16@addiu-error.l: New stderr output.
* testsuite/gas/mips/micromips@addiu-error.l: New stderr output.
* testsuite/gas/mips/break-error.l: New stderr output.
* testsuite/gas/mips/addiu-error.s: New test source.
* testsuite/gas/mips/break-error.s: New test source.
* testsuite/gas/mips/mips.exp: Run the new tests.
2017-05-15 Maciej W. Rozycki <macro@imgtec.com>
* config/tc-mips.c (match_mips16_insn): Remove the explicit

17
gas/config/tc-mips.c
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@ -4856,7 +4856,10 @@ match_const_int (struct mips_arg_info *arg, offsetT *value)
*value = ex.X_add_number;
else
{
match_not_constant (arg);
if (r[0] == BFD_RELOC_UNUSED && ex.X_op == O_big)
match_out_of_range (arg);
else
match_not_constant (arg);
return FALSE;
}
return TRUE;
@ -5062,6 +5065,12 @@ match_int_operand (struct mips_arg_info *arg,
if (!match_expression (arg, &offset_expr, offset_reloc))
return FALSE;
if (offset_expr.X_op == O_big)
{
match_out_of_range (arg);
return FALSE;
}
if (offset_reloc[0] != BFD_RELOC_UNUSED)
/* Relocation operators were used. Accept the argument and
leave the relocation value in offset_expr and offset_relocs
@ -8261,6 +8270,12 @@ match_mips16_insn (struct mips_cl_insn *insn, const struct mips_opcode *opcode,
return FALSE;
}
if (offset_expr.X_op == O_big)
{
match_out_of_range (&arg);
return FALSE;
}
relax_char = c;
continue;
}

3
gas/testsuite/gas/mips/addiu-error.d Normal file
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@ -0,0 +1,3 @@
#name: MIPS ADDIU errors
#as: -32
#error-output: addiu-error.l

8
gas/testsuite/gas/mips/addiu-error.l Normal file
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@ -0,0 +1,8 @@
.*: Assembler messages:
.*:5: Error: operand 2 out of range `addiu \$2,-32769'
.*:6: Error: operand 2 out of range `addiu \$2,65536'
.*:7: Error: operand 2 out of range `addiu \$2,0x10000000000000000'
.*:8: Error: operand 2 must be an immediate expression `addiu \$2,\$3'
.*:9: Error: invalid operands `addiu \$2,\(\$3\)'
.*:10: Error: register value used as expression `addiu \$2,0\+\$3'
.*:11: Error: register value used as expression `addiu \$2,\(\(\$3\)\)'

11
gas/testsuite/gas/mips/addiu-error.s Normal file
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@ -0,0 +1,11 @@
# Source code used to test error diagnostics with the ADDIU instruction.
.text
foo:
addiu $2, -32769
addiu $2, 65536
addiu $2, 0x10000000000000000
addiu $2, $3
addiu $2, ($3)
addiu $2, 0+$3
addiu $2, (($3))

3
gas/testsuite/gas/mips/break-error.d Normal file
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@ -0,0 +1,3 @@
#name: MIPS BREAK errors
#as: -32
#error-output: break-error.l

8
gas/testsuite/gas/mips/break-error.l Normal file
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@ -0,0 +1,8 @@
.*: Assembler messages:
.*:5: Error: operand 1 out of range `break -1'
.*:6: Error: operand 1 out of range `break 65536'
.*:7: Error: operand 1 out of range `break 0x10000000000000000'
.*:8: Error: operand 1 must be an immediate expression `break \$3'
.*:9: Error: invalid operands `break \(\$3\)'
.*:10: Error: register value used as expression `break 0\+\$3'
.*:11: Error: register value used as expression `break \(\(\$3\)\)'

11
gas/testsuite/gas/mips/break-error.s Normal file
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@ -0,0 +1,11 @@
# Source code used to test error diagnostics with the BREAK instruction.
.text
foo:
break -1
break 65536
break 0x10000000000000000
break $3
break ($3)
break 0+$3
break (($3))

2
gas/testsuite/gas/mips/lui-1.l
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@ -1,7 +1,7 @@
.*\.s: Assembler messages:
.*\.s:5: Error: operand 2 out of range `lui \$2,-1'
.*\.s:6: Error: operand 2 out of range `lui \$2,65536'
.*\.s:7: Error: bignum invalid
.*\.s:7: Error: operand 2 out of range `lui \$2,0x10000000000000000'
.*\.s:8: Error: operand 2 must be an immediate expression `lui \$2,\$3'
.*\.s:9: Error: invalid operands `lui \$2,\(\$3\)'
.*\.s:10: Error: register value used as expression `lui \$2,0\+\$3'

4
gas/testsuite/gas/mips/micromips@addiu-error.d Normal file
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@ -0,0 +1,4 @@
#name: MIPS ADDIU errors
#as: -32
#error-output: micromips@addiu-error.l
#source: addiu-error.s

8
gas/testsuite/gas/mips/micromips@addiu-error.l Normal file
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@ -0,0 +1,8 @@
.*: Assembler messages:
.*:5: Error: operand 2 out of range `addiu \$2,-32769'
.*:6: Error: operand 2 out of range `addiu \$2,65536'
.*:7: Error: operand 2 out of range `addiu \$2,0x10000000000000000'
.*:8: Error: operand 2 must be an immediate expression `addiu \$2,\$3'
.*:9: Error: operand 2 out of range `addiu \$2,\(\$3\)'
.*:10: Error: register value used as expression `addiu \$2,0\+\$3'
.*:11: Error: register value used as expression `addiu \$2,\(\(\$3\)\)'

2
gas/testsuite/gas/mips/mips.exp
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@ -1466,6 +1466,8 @@ if { [istarget mips*-*-vxworks*] } {
run_dump_test_arches "lui" [mips_arch_list_matching mips1]
run_dump_test_arches "lui-1" [mips_arch_list_matching mips1]
run_dump_test_arches "lui-2" [mips_arch_list_matching mips1]
run_dump_test_arches "addiu-error" [mips_arch_list_all]
run_dump_test_arches "break-error" [mips_arch_list_all]
run_dump_test "r5900"
run_dump_test "r5900-full"

4
gas/testsuite/gas/mips/mips16@addiu-error.d Normal file
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@ -0,0 +1,4 @@
#name: MIPS ADDIU errors
#as: -32
#error-output: mips16@addiu-error.l
#source: addiu-error.s

8
gas/testsuite/gas/mips/mips16@addiu-error.l Normal file
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@ -0,0 +1,8 @@
.*: Assembler messages:
.*:5: Error: operand value out of range for instruction
.*:6: Error: operand value out of range for instruction
.*:7: Error: operand 2 out of range `addiu \$2,0x10000000000000000'
.*:8: Error: operand 2 must be an immediate expression `addiu \$2,\$3'
.*:9: Error: invalid operands `addiu \$2,\(\$3\)'
.*:10: Error: register value used as expression `addiu \$2,0\+\$3'
.*:11: Error: register value used as expression `addiu \$2,\(\(\$3\)\)'