From c84a88d8cb298b6757ad01a12a8bbba66cb6eaa2 Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Mon, 31 Jan 2011 10:42:26 +0000 Subject: hw/slavio_intctl.c: fix gcc warning about array bounds overrun The Ubuntu 10.10 gcc for ARM complains that we might be overrunning the cpu_irqs[][] array: silence this by correcting the bounds on the loop. (In fact we would not have overrun the array because bit MAX_PILS in pil_pending and irl_out will always be 0.) Also add a comment about why the loop's lower bound is OK. Signed-off-by: Peter Maydell Signed-off-by: Blue Swirl --- hw/slavio_intctl.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'hw') diff --git a/hw/slavio_intctl.c b/hw/slavio_intctl.c index fd69354bb3..a83e5b8272 100644 --- a/hw/slavio_intctl.c +++ b/hw/slavio_intctl.c @@ -289,7 +289,12 @@ static void slavio_check_interrupts(SLAVIO_INTCTLState *s, int set_irqs) pil_pending |= (s->slaves[i].intreg_pending & CPU_SOFTIRQ_MASK) >> 16; if (set_irqs) { - for (j = MAX_PILS; j > 0; j--) { + /* Since there is not really an interrupt 0 (and pil_pending + * and irl_out bit zero are thus always zero) there is no need + * to do anything with cpu_irqs[i][0] and it is OK not to do + * the j=0 iteration of this loop. + */ + for (j = MAX_PILS-1; j > 0; j--) { if (pil_pending & (1 << j)) { if (!(s->slaves[i].irl_out & (1 << j))) { qemu_irq_raise(s->cpu_irqs[i][j]); -- cgit v1.2.1