The copy of ipxe used during Xen tools build does not define
ISA_PROBE_ADDRS. As a result isa_extra_probe_addrs[] has a size of 0.
ISA_IOADDR() tries to access that empty array, which is detected by the
newer gcc (or perhaps the warning was just turned into an error)
drivers/bus/isa.c: In function 'isabus_probe':
drivers/bus/isa.c:112:18: error: array subscript is above array bounds
[-Werror=array-bounds]
---
src/drivers/bus/isa.c | 3 +++
1 file changed, 3 insertions(+)
Index: ipxe/src/drivers/bus/isa.c
===================================================================
--- ipxe.orig/src/drivers/bus/isa.c
+++ ipxe/src/drivers/bus/isa.c
@@ -97,6 +97,9 @@ static int isabus_probe ( struct root_de
int ioidx;
int rc;
+ if ( ISA_EXTRA_PROBE_ADDR_COUNT == 0 )
+ return 0;
+
for_each_table_entry ( driver, ISA_DRIVERS ) {
for ( ioidx = ISA_IOIDX_MIN ( driver ) ;
ioidx <= ISA_IOIDX_MAX ( driver ) ; ioidx++ ) {
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