https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276376
Bug ID: 276376
Summary: arm64 ddb: the disassembler does not recognise STP
instructions
Product: Base System
Version: 14.0-RELEASE
Hardware: arm64
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Comparing DDB with gdb:
# sysctl debug.kdb.enter=1
debug.kdb.enKDB: enter: sysctl debug.kdb.enter
[ thread pid 873 tid 100293 ]
Stopped at kdb_sysctl_enter+0x98: str xzr, [x19, #256]
db> x/i pci_add_child,10
pci_add_child: undefined a9ba7bfd
pci_add_child+0x4: str x27, [sp, #16]
pci_add_child+0x8: undefined a90267fa
pci_add_child+0xc: undefined a9035ff8
pci_add_child+0x10: undefined a90457f6
pci_add_child+0x14: undefined a9054ff4
pci_add_child+0x18: mov x29, sp
pci_add_child+0x1c: mov x21, x1
pci_add_child+0x20: mov x1, xzr
pci_add_child+0x24: undefined 12800002
pci_add_child+0x28: mov x22, x0
pci_add_child+0x2c: undefined 940b8a7b
pci_add_child+0x30: mov x19, x21
pci_add_child+0x34: mov x1, x21
pci_add_child+0x38: mov x20, x0
pci_add_child+0x3c: str x0, [x19, #24]!
db> c
ter: 0 -> 0
# kgdb ./kernel.full
GNU gdb (GDB) 13.2 [GDB v13.2 for FreeBSD]
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "aarch64-portbld-freebsd14.0".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
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Reading symbols from ./kernel.full...
(kgdb) x/10i pci_add_child
0xffff000000223194 <pci_add_child>: stp x29, x30, [sp, #-96]!
0xffff000000223198 <pci_add_child+4>: str x27, [sp, #16]
0xffff00000022319c <pci_add_child+8>: stp x26, x25, [sp, #32]
0xffff0000002231a0 <pci_add_child+12>: stp x24, x23, [sp, #48]
0xffff0000002231a4 <pci_add_child+16>: stp x22, x21, [sp, #64]
0xffff0000002231a8 <pci_add_child+20>: stp x20, x19, [sp, #80]
0xffff0000002231ac <pci_add_child+24>: mov x29, sp
0xffff0000002231b0 <pci_add_child+28>: mov x21, x1
0xffff0000002231b4 <pci_add_child+32>: mov x1, xzr
0xffff0000002231b8 <pci_add_child+36>: mov w2, #0xffffffff
// #-1
(kgdb) q
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