@@ -1175,10 +1175,42 @@ static bool roms_overlap(Rom *last_rom, Rom *this_rom)
last_rom->addr + last_rom->romsize > this_rom->addr;
}
+static const char *rom_as_name(Rom *rom)
+{
+ const char *name = rom->as ? rom->as->name : NULL;
+ return name ?: "anonymous";
+}
+
+static void rom_print_overlap_error_header(void)
+{
+ error_report("Some ROM regions are overlapping");
+ error_printf(
+ "These ROM regions might have been loaded by "
+ "direct user request or by default.\n"
+ "They could be BIOS/firmware images, a guest kernel, "
+ "initrd or some other file loaded into guest memory.\n"
+ "Check whether you intended to load all this guest code, and "
+ "whether it has been built to load to the correct addresses.\n");
+}
+
+static void rom_print_one_overlap_error(Rom *last_rom, Rom *rom)
+{
+ error_printf(
+ "\nThe following two regions overlap (in the %s address space):\n",
+ rom_as_name(rom));
+ error_printf(
+ " %s (addresses 0x" TARGET_FMT_plx " - 0x" TARGET_FMT_plx ")\n",
+ last_rom->name, last_rom->addr, last_rom->addr + last_rom->romsize);
+ error_printf(
+ " %s (addresses 0x" TARGET_FMT_plx " - 0x" TARGET_FMT_plx ")\n",
+ rom->name, rom->addr, rom->addr + rom->romsize);
+}
+
int rom_check_and_register_reset(void)
{
MemoryRegionSection section;
Rom *rom, *last_rom = NULL;
+ bool found_overlap = false;
QTAILQ_FOREACH(rom, &roms, next) {
if (rom->fw_file) {
@@ -1186,12 +1218,12 @@ int rom_check_and_register_reset(void)
}
if (!rom->mr) {
if (roms_overlap(last_rom, rom)) {
- fprintf(stderr, "rom: requested regions overlap "
- "(rom %s. free=0x" TARGET_FMT_plx
- ", addr=0x" TARGET_FMT_plx ")\n",
- rom->name, last_rom->addr + last_rom->romsize,
- rom->addr);
- return -1;
+ if (!found_overlap) {
+ found_overlap = true;
+ rom_print_overlap_error_header();
+ }
+ rom_print_one_overlap_error(last_rom, rom);
+ /* Keep going through the list so we report all overlaps */
}
last_rom = rom;
}
@@ -1200,6 +1232,10 @@ int rom_check_and_register_reset(void)
rom->isrom = int128_nz(section.size) && memory_region_is_rom(section.mr);
memory_region_unref(section.mr);
}
+ if (found_overlap) {
+ return -1;
+ }
+
qemu_register_reset(rom_reset, NULL);
roms_loaded = 1;
return 0;
@@ -4459,7 +4459,6 @@ void qemu_init(int argc, char **argv, char **envp)
qemu_run_machine_init_done_notifiers();
if (rom_check_and_register_reset() != 0) {
- error_report("rom check and register reset failed");
exit(1);
}
In rom_check_and_register_reset() we report to the user if there is a "ROM region overlap". This has a couple of problems: * the reported information is not very easy to intepret * the function just prints the overlap to stderr (and relies on its single callsite in vl.c to do an error_report() and exit) * only the first overlap encountered is diagnosed Make this function use error_report() and error_printf() and report a more user-friendly report with all the overlaps diagnosed. Sample old output: rom: requested regions overlap (rom dtb. free=0x0000000000008000, addr=0x0000000000000000) qemu-system-aarch64: rom check and register reset failed Sample new output: qemu-system-aarch64: Some ROM regions are overlapping These ROM regions might have been loaded by direct user request or by default. They could be BIOS/firmware images, a guest kernel, initrd or some other file loaded into guest memory. Check whether you intended to load all this guest code, and whether it has been built to load to the correct addresses. The following two regions overlap (in the cpu-memory-0 address space): phdr #0: /home/petmay01/linaro/qemu-misc-tests/ldmia-fault.axf (addresses 0x0000000000000000 - 0x0000000000008000) dtb (addresses 0x0000000000000000 - 0x0000000000100000) The following two regions overlap (in the cpu-memory-0 address space): phdr #1: /home/petmay01/linaro/qemu-misc-tests/bad-psci-call.axf (addresses 0x0000000040000000 - 0x0000000040000010) phdr #0: /home/petmay01/linaro/qemu-misc-tests/bp-test.elf (addresses 0x0000000040000000 - 0x0000000040000020) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> --- The sample output is from a completely bogus commandline where I just loaded multiple clashing ELF files I had to hand using -device loader. --- hw/core/loader.c | 48 ++++++++++++++++++++++++++++++++++++++++++------ softmmu/vl.c | 1 - 2 files changed, 42 insertions(+), 7 deletions(-)