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| author | Mark Johnston <markj@FreeBSD.org> | 2023-02-28 16:09:26 +0000 |
|---|---|---|
| committer | Mark Johnston <markj@FreeBSD.org> | 2023-02-28 16:10:04 +0000 |
| commit | 092a543ec3d276e48da09538ae29c736fdce4631 (patch) | |
| tree | 9a5a27723e1acd6b1508efe79cc2a751bdccd64b | |
| parent | eef9f9900f118b5efcabbd5864e7b8b993d09922 (diff) | |
| download | src-092a543ec3d276e48da09538ae29c736fdce4631.tar.gz src-092a543ec3d276e48da09538ae29c736fdce4631.zip | |
dtrace_kinst.4: Demonstrate usage of the "regs" variable
Suggested by: Mina Galić <freebsd@igalic.co>
Reviewed by: christos
Differential Revision: https://reviews.freebsd.org/D38823
| -rw-r--r-- | share/man/man4/dtrace_kinst.4 | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/share/man/man4/dtrace_kinst.4 b/share/man/man4/dtrace_kinst.4 index 0987ba493e55..349cb1aab1dd 100644 --- a/share/man/man4/dtrace_kinst.4 +++ b/share/man/man4/dtrace_kinst.4 @@ -57,7 +57,7 @@ The provider is currently implemented only for amd64. .Sh EXAMPLES Find the offset corresponding to the third instruction in .Fn vm_fault -and trace it: +and trace it, printing the contents of the RSI register: .Bd -literal -offset indent # kgdb (kgdb) disas /r vm_fault @@ -66,12 +66,12 @@ Dump of assembler code for function vm_fault: 0xffffffff80876df1 <+1>: 48 89 e5 mov %rsp,%rbp 0xffffffff80876df4 <+4>: 41 57 push %r15 -# dtrace -n 'kinst::vm_fault:4' - 2 81500 vm_fault:4 - 2 81500 vm_fault:4 - 2 81500 vm_fault:4 - 2 81500 vm_fault:4 - 0 81500 vm_fault:4 +# dtrace -n 'kinst::vm_fault:4 {printf("%#x", regs[R_RSI]);}' + 2 81500 vm_fault:4 0x827c56000 + 2 81500 vm_fault:4 0x827878000 + 2 81500 vm_fault:4 0x1fab9bef0000 + 2 81500 vm_fault:4 0xe16cf749000 + 0 81500 vm_fault:4 0x13587c366000 ... .Ed .Pp |