Hi all,
I just triggered a nasty indefinite recursion in pci_default_read_config:
uint32_t pci_default_read_config(PCIDevice *d,
uint32_t address, int len)
{
uint32_t val = 0;
assert(len == 1 || len == 2 || len == 4);
if (pci_access_cap_config(d, address, len)) {
return d->cap.config_read(d, address, len);
}
len = MIN(len, pci_config_size(d) - address);
memcpy(&val, d->config + address, len);
return le32_to_cpu(val);
}
And d->cap.config_read is pointing to pci_default_read_config:
(gdb) print *d
$3 = {qdev = {id = 0xc99b10 "01:10.0", state = DEV_STATE_INITIALIZED,
opts = 0xc99ad0, hotplugged = 0, info = 0x837e60, parent_bus = 0xc71710,
num_gpio_out = 0, gpio_out = 0x0, num_gpio_in = 0, gpio_in = 0x0,
child_bus = {lh_first = 0x0}, num_child_bus = 0, sibling = {
le_next = 0xc99c30, le_prev = 0xc71730}},
config = 0xca3010 "\206\200\312\020\003",
cmask = 0xca3120 "\377\377\377\377", wmask = 0xca3230 "",
used = 0xca3340 "", bus = 0xc71710, devfn = 32,
name = "pci-assign", '\000'<repeats 53 times>, io_regions = {{
addr = 4060102656, size = 16384, filtered_size = 16384, type = 0 '\000',
map_func = 0x46a5f0<assigned_dev_iomem_map>}, {addr = 0, size = 0,
filtered_size = 0, type = 0 '\000', map_func = 0}, {addr = 0, size = 0,
filtered_size = 0, type = 0 '\000', map_func = 0}, {addr = 4060119040,
size = 16384, filtered_size = 16384, type = 0 '\000',
map_func = 0x46a5f0<assigned_dev_iomem_map>}, {addr = 0, size = 0,
filtered_size = 0, type = 0 '\000', map_func = 0}, {addr = 0, size = 0,
filtered_size = 0, type = 0 '\000', map_func = 0}, {addr = 0, size = 0,
filtered_size = 0, type = 0 '\000', map_func = 0}},
config_read = 0x46a050<assigned_dev_pci_read_config>,
config_write = 0x469f30<assigned_dev_pci_write_config>, irq = 0xca3450,
irq_state = 0 '\000', cap_present = 0, msix_cap = 0 '\000',
msix_entries_nr = 0, msix_table_page = 0x0, msix_mmio_index = 0,
msix_entry_used = 0x0, msix_bar_size = 0, version_id = 2,
msix_page_size = 0, msix_irq_entries = 0x0, cap = {supported = 1,
start = 64, length = 16,
config_read = 0x416770<pci_default_cap_read_config>,
config_write = 0x46b750<assigned_device_pci_cap_write_config>}}
