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S12Z: gas: Fix bug when a symbol name was the single letter 'c'.

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The assembler incorrectly recognised "c" as a register name, and
refused to allow it where it expected a symbol/label.

gas/
	* config/tc-s12z.c (lex_reg_name): Compare the length of the strings
	before the contents.
	* testsuite/gas/s12z/labels.d: New file.
	* testsuite/gas/s12z/labels.s: New file.
	* testsuite/gas/s12z/s12z.exp: Add them.
This commit is contained in:
John Darrington
2019-01-14 16:55:17 +01:00
parent 77fdb0e00b
commit e7b47f2e68
5 changed files with 32 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
gas/ChangeLog
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@ -1,5 +1,10 @@
2019-01-16 John Darrington <john@darrington.wattle.id.au> 2019-01-16 John Darrington <john@darrington.wattle.id.au>
* config/tc-s12z.c (lex_reg_name): Compare the length of the strings
before the contents.
* testsuite/gas/s12z/labels.d: New file.
* testsuite/gas/s12z/labels.s: New file.
* testsuite/gas/s12z/s12z.exp: Add them.
* config/tc-s12z.c (tfr): Change as_bad to as_warn. * config/tc-s12z.c (tfr): Change as_bad to as_warn.
Also fix message typo and semantics. Also fix message typo and semantics.
* config/tc-s12z.c (emit_opr): Emit BFD_RELOC_S12Z_OPR instead of * config/tc-s12z.c (emit_opr): Emit BFD_RELOC_S12Z_OPR instead of

5
gas/config/tc-s12z.c
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@ -308,7 +308,7 @@ lex_reg_name (uint16_t which, int *reg)
p++; p++;
} }
int len = p - input_line_pointer; size_t len = p - input_line_pointer;
if (len <= 0) if (len <= 0)
return 0; return 0;
@ -318,7 +318,8 @@ lex_reg_name (uint16_t which, int *reg)
{ {
gas_assert (registers[i].name); gas_assert (registers[i].name);
if (0 == strncasecmp (registers[i].name, input_line_pointer, len)) if (len == strlen (registers[i].name)
&& 0 == strncasecmp (registers[i].name, input_line_pointer, len))
{ {
if ((0x1U << i) & which) if ((0x1U << i) & which)
{ {

18
gas/testsuite/gas/s12z/labels.d Normal file
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@ -0,0 +1,18 @@
#objdump: -d -r
#name: check that certain symbol labels are correctly accepted.
#source: labels.s
.*: file format elf32-s12z
Disassembly of section .text:
00000000 <.text>:
0: c4 fa 00 00 st d0, 0
4: 00
2: R_S12Z_OPR c
5: c4 bd st d0, d1
7: c5 fa 00 00 st d1, 0
b: 00
9: R_S12Z_OPR xavier

3
gas/testsuite/gas/s12z/labels.s Normal file
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@ -0,0 +1,3 @@
st d0, c ; c is a valid label
st d0, d1 ; Move D0 into the memory at address D1
st d1, xavier ; This is a valid label

1
gas/testsuite/gas/s12z/s12z.exp
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@ -119,6 +119,7 @@ run_dump_test bit-manip-invalid
run_dump_test opr-symbol run_dump_test opr-symbol
run_dump_test brclr-symbols run_dump_test brclr-symbols
run_dump_test dbCC run_dump_test dbCC
run_dump_test labels
# Expression related tests # Expression related tests
run_dump_test opr-expr run_dump_test opr-expr