Hello,
I noticed that several division related routines provided by libgcc such
as __divdi3, __moddi3 and __umoddi3 have references to _Unwind_Resume
for the sparc-rtems target. For example:
.file "libgcc2.c"
! GNU C17 (GCC) version 13.0.0 20220621 (experimental) [master
r13-1187-gab981aab92c] (sparc-rtems6)
! compiled by GNU C version 12.1.1 20220517 [revision
325d82b08696da17fb26bd2e1b6ba607649357fb], GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3, isl version isl-0.16.1-GMP
! GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
! options passed: -msoft-float -mcpu=leon3 -g -g -g -O0 -O2 -O0
-fbuilding-libgcc -fno-stack-protector -fexceptions
-fnon-call-exceptions -fvisibility=hidden
.LLBE7:
.LLBE6:
! /home/EB/sebastian_h/src/gcc/libgcc/libgcc2.c:1225: w = __udivmoddi4
(uu.ll, vv.ll, (UDWtype *) 0);
.loc 1 1225 5
std %g2, [%fp-16] ! D.3900, w
! /home/EB/sebastian_h/src/gcc/libgcc/libgcc2.c:1226: if (c)
.loc 1 1226 6
ld [%fp-4], %g1 ! c, tmp284
cmp %g1, 0 ! tmp284,
be .LL25
nop !
b .LL28
nop !
.LL27:
mov %i0, %g1 !, tmp283
mov %g1, %o0 ! D.3909,
.LLEHB2:
call _Unwind_Resume, 0
nop !,
.LL28:
Could someone please give me a hint, why the compiler generates this
code? I was unable to figure this out by looking at the pre-processed
code. I tried to reproduce it with a simple division by zero test case,
but this didn't work:
unsigned f(unsigned i)
{
return i / 0;
}
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