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gas: Update fr_literal access in frag for GCC 10

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When access fr_literal in

struct frag {
  ...
  /* Data begins here.  */
  char fr_literal[1];
};

with

char *buf = fragp->fr_fix + fragp->fr_literal;

GCC 10 gave

gas/config/tc-csky.c: In function ‘md_convert_frag’:
gas/config/tc-csky.c:4507:9: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
 4507 |  buf[1] = BYTE_1 (CSKYV1_INST_SUBI | (7 << 4));
      |         ^

Change

  char *buf = fragp->fr_fix + fragp->fr_literal;

to

  char *buf = fragp->fr_fix + &fragp->fr_literal[0];

to silence GCC 10 warning.

	* config/tc-csky.c (md_convert_frag): Replace fragp->fr_literal
	with &fragp->fr_literal[0].
	* config/tc-microblaze.c (md_apply_fix): Likewise.
	* config/tc-sh.c (md_convert_frag): Likewise.
This commit is contained in:
H.J. Lu 2020-05-25 04:50:56 -07:00
parent 8f7d38efad
commit a39d29cda1
4 changed files with 10 additions and 3 deletions
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7
gas/ChangeLog
View File

@ -1,3 +1,10 @@
2020-05-25 H.J. Lu <hongjiu.lu@intel.com>
* config/tc-csky.c (md_convert_frag): Replace fragp->fr_literal
with &fragp->fr_literal[0].
* config/tc-microblaze.c (md_apply_fix): Likewise.
* config/tc-sh.c (md_convert_frag): Likewise.
2020-05-24 Jim Wilson <jimw@sifive.com>
PR 26025

2
gas/config/tc-csky.c
View File

@ -4196,7 +4196,7 @@ void
md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
{
offsetT disp;
char *buf = fragp->fr_fix + fragp->fr_literal;
char *buf = fragp->fr_fix + &fragp->fr_literal[0];
gas_assert (fragp->fr_symbol);
if (IS_EXTERNAL_SYM (fragp->fr_symbol, asec))

2
gas/config/tc-microblaze.c
View File

@ -1983,7 +1983,7 @@ md_apply_fix (fixS * fixP,
valueT * valp,
segT segment)
{
char * buf = fixP->fx_where + fixP->fx_frag->fr_literal;
char * buf = fixP->fx_where + &fixP->fx_frag->fr_literal[0];
const char * file = fixP->fx_file ? fixP->fx_file : _("unknown");
const char * symname;
/* Note: use offsetT because it is signed, valueT is unsigned. */

2
gas/config/tc-sh.c
View File

@ -3081,7 +3081,7 @@ md_convert_frag (bfd *headers ATTRIBUTE_UNUSED, segT seg, fragS *fragP)
differently from ones without delay slots. */
{
unsigned char *buffer =
(unsigned char *) (fragP->fr_fix + fragP->fr_literal);
(unsigned char *) (fragP->fr_fix + &fragP->fr_literal[0]);
int highbyte = target_big_endian ? 0 : 1;
int lowbyte = target_big_endian ? 1 : 0;
int delay = fragP->fr_subtype == C (COND_JUMP_DELAY, COND12);