mirror of https://github.com/kholia/OSX-KVM.git
34 lines
1.3 KiB
Plaintext
34 lines
1.3 KiB
Plaintext
|
1. How do I symbolicate kernel panic traces?
|
||
|
|
|
||
|
|
Just add keepsyms=1 to either the Kernel Flags setting in /Library/Preferences/SystemConfiguration/com.apple.Boot.plist,
|
||
|
|
or to the boot-args NVRAM variable. Reboot, and any subsequent panics will be automatically symbolicated. You can run
|
||
|
|
mangled C++ symbols through the c++filt command line utility to get the proper C++ function signatures.
|
||
|
|
|
||
|
|
$ sudo nvram boot-args="-v keepsyms=1"
|
||
|
|
|
||
|
|
Thanks for Phil Dennis-Jordan for this great tip.
|
||
|
|
|
||
|
|
2. Debugging a AVX related crash which occurs at bootup.
|
||
|
|
|
||
|
|
$ nm /System/Library/Extensions/corecrypto.kext/Contents/MacOS/corecrypto | grep avx
|
||
|
|
0000000000001840 T _ccsha256_vng_intel_avx1_compress
|
||
|
|
0000000000036708 T _ccsha256_vng_intel_avx2_compress
|
||
|
|
0000000000026973 T _ccsha512_vng_intel_avx1_compress
|
||
|
|
00000000000327cb T _ccsha512_vng_intel_avx2_compress
|
||
|
|
000000000001d960 T _gcmDecrypt_avx1
|
||
|
|
000000000001c980 T _gcmEncrypt_avx1
|
||
|
|
|
||
|
|
$ gdb /System/Library/Extensions/corecrypto.kext/Contents/MacOS/corecrypto
|
||
|
|
(gdb) x/16i 0x0000000000001840
|
||
|
|
0x1840: push %rbp
|
||
|
|
0x1841: mov %rsp,%rbp
|
||
|
|
0x1844: push %rbx
|
||
|
|
0x1845: push %r12
|
||
|
|
0x1847: push %r13
|
||
|
|
0x1849: push %r14
|
||
|
|
0x184b: push %r15
|
||
|
|
0x184d: sub $0x168,%rsp
|
||
|
|
0x1854: lea 0x60(%rsp),%rax
|
||
|
|
0x1859: and $0xffffffffffffffe0,%rax
|
||
|
|
0x185d: vmovdqa %ymm0,(%rax) <--- the crash occurs here due to lack of "xsave" support
|