On Sun, Sep 16, 2018 at 01:43:51PM -0700, Manfred Antar wrote:
> With r338700 support.S i get panic after rebooting:
>
> avail memory = 16529514496 (15763 MB)
> MADT: Found CPU APIC ID 0 ACPI ID 1: enabled
> SMP: Added CPU 0 (AP)
> MADT: Found CPU APIC ID 2 ACPI ID 2: enabled
> SMP: Added CPU 2 (AP)
> MADT: Found CPU APIC ID 1 ACPI ID 3: enabled
> SMP: Added CPU 1 (AP)
> MADT: Found CPU APIC ID 3 ACPI ID 4: enabled
> SMP: Added CPU 3 (AP)
> Event timer "LAPIC" quality 100
> kernel trap 9 with interrupts disabled
>
>
> Fatal trap 9: general protection fault while in kernel mode
> cpuid = 0; apic id = 00
> instruction pointer = 0x20:0x80747d86
> stack pointer = 0x28:0x82451820
> frame pointer = 0x28:0x82451820
> code segment = base 0x0, limit 0xf, type 0x1b
> = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags = resume, IOPL = 0
> current process = 0 ()
> [ thread pid 0 tid 0 ]
> Stopped at strcmp+0x6: movb(%rsi),%dl
> db> bt
> Tracing pid 0 tid 0 td 0x81015180
> strcmp() at strcmp+0x6/frame 0x82451820
> sysctl_register_oid() at sysctl_register_oid+0x4c/frame 0x82451b40
> sysctl_add_oid() at sysctl_add_oid+0x20d/frame 0x82451b90
> et_register() at et_register+0x14d/frame 0x82451bf0
> native_lapic_init() at native_lapic_init+0x4e3/frame 0x82451c10
> madt_setup_local() at madt_setup_local+0x26e/frame 0x82451c40
> apic_setup_local() at apic_setup_local+0x44/frame 0x82451c50
> mi_startup() at mi_startup+0x118/frame 0x82451c70
> btext() at btext+0x2c
> db>
>
> With support.S r338683 no problem
What is your cpu ? Show first 50 lines from the verbose dmesg.
Also please try this patch.
diff --git a/sys/amd64/amd64/support.S b/sys/amd64/amd64/support.S
index f86d3d11506..5a4e62faba1 100644
--- a/sys/amd64/amd64/support.S
+++ b/sys/amd64/amd64/support.S
@@ -122,7 +122,6 @@ ENTRY(memmove_std)
movq%rdx,%rcx
andq$7,%rcx /* any bytes left? */
jne 2f
- movq%r9,%rax
POP_FRAME_POINTER
ret
2:
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