https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95353
Bug ID: 95353
Summary: [10/11 Regression] GCC can't build binutils
Product: gcc
Version: 10.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: msebor at gcc dot gnu.org
Target Milestone: ---
Assembler in binutils has
struct frag {
...
/* Data begins here. */
char fr_literal[1];
};
and fr_literal is accessed as
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
[-Wer
ror=stringop-overflow=]
4507 | buf[1] = BYTE_1 (CSKYV1_INST_SUBI | (7 << 4));
| ^
I checked in this:
char *buf = fragp->fr_fix + &fragp->fr_literal[0];
as a workaround. But it doesn't solve the problem in existing binutils
sources and some future version of gcc might see through the obfuscation
of the source, rendering this work-around ineffective. is there a solution
which is future proof?
