https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70830
Bug ID: 70830
Summary: ARM interrupt attribute: push/pop do not support
{reglist}^
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: fab...@ritter-vogt.de
Target Milestone: ---
Using attribute((interrupt)) on a function that accesses a local and a global
variable causes gcc to emit broken assembly. It needs to be "ldm" instead of
pop.
Code:
long *a;
__attribute__((interrupt)) void fn1() {
for (int x; x;)
*(long *)8096384 = a[20 / x];
}
Output:
> >arm-none-eabi-gcc -c -Os test.c
> test.s: Assembler messages:
> test.s:47: Error: push/pop do not support {reglist}^ -- `pop
> {r0,r1,r2,r3,pc}^'
