1 files changed, 84 insertions, 0 deletions

diff --git a/gitlab/issues/target_arm/host_missing/accel_missing/2729.toml b/gitlab/issues/target_arm/host_missing/accel_missing/2729.toml
new file mode 100644
index 00000000..f7102c10
--- /dev/null
+++ b/gitlab/issues/target_arm/host_missing/accel_missing/2729.toml
@@ -0,0 +1,84 @@
+id = 2729
+title = "qemu-system-aarch64 -M raspi4b -- no valid DTB provided in x0 register"
+state = "closed"
+created_at = "2024-12-19T01:59:55.229Z"
+closed_at = "2025-02-04T17:26:34.014Z"
+labels = ["target: arm"]
+url = "https://gitlab.com/qemu-project/qemu/-/issues/2729"
+host-os = "Ubuntu 24.04.1 LTS"
+host-arch = "x86_64"
+qemu-version = "QEMU emulator version 9.2.50 (v9.2.0-319-gca80a5d026)"
+guest-os = "custom"
+guest-arch = "aarch64"
+description = """When starting `qemu-system-aarch64 -M raspi4b`, no valid DTB is provided in x0."""
+reproduce = """Make a simple binary to loop forever
+
+```
+$ cat loop.c
+void _start(void)
+{
+\tfor(;;)
+\t\t;
+}
+$ aarch64-linux-gnu-gcc loop.c -nostdlib
+$ aarch64-linux-gnu-objcopy -O binary a.out loop.bin
+```
+
+Start qemu for debugging and start gdb
+
+```
+$ qemu-system-aarch64 -S -s -M raspi4b -kernel loop.bin
+# in another terminal
+$ aarch64-linux-gnu-gdb
+(gdb) target remote :1234
+Remote debugging using :1234
+warning: No executable has been specified and target does not support
+determining executable automatically.  Try using the "file" command.
+0x0000000000000000 in ?? ()
+(gdb) watch *$x0
+Watchpoint 3: *$x0
+(gdb) watch $x0
+Watchpoint 4: $x0
+(gdb) x/2x$x0
+0x0:\t0x580000c0\t0xaa1f03e1
+(gdb) si
+
+Thread 1 hit Watchpoint 3: *$x0
+
+Old value = 1476395200
+New value = 5
+
+Thread 1 hit Watchpoint 4: $x0
+
+Old value = 0
+New value = 256
+0x0000000000000004 in ?? ()
+(gdb) x/2x$x0
+0x100:\t0x00000005\t0x54410001
+(gdb) si
+0x0000000000000008 in ?? ()
+(gdb) si
+0x000000000000000c in ?? ()
+(gdb) si
+0x000000000000000c in ?? ()
+(gdb) si
+0x0000000000000010 in ?? ()
+(gdb) si
+0x0000000000000014 in ?? ()
+(gdb) si
+0x0000000000080000 in ?? ()
+(gdb) si
+0x0000000000000200 in ?? ()
+(gdb) si
+0x0000000000000200 in ?? ()
+(gdb) si
+0x0000000000000200 in ?? ()
+(gdb) si
+0x0000000000000200 in ?? ()
+(gdb) x/2x$x0
+0x100:\t0x00000005\t0x54410001
+(gdb) 
+```
+
+Note that at no time is a valid DTB provided in x0. I expected to see the DTB magic 0xd00dfeed (or 0xedfe0dd0) at the memory pointed to by x0"""
+additional = "n/a"