Date: Tue, 28 Feb 2023 16:10:23 GMT From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 092a543ec3d2 - main - dtrace_kinst.4: Demonstrate usage of the "regs" variable Message-ID: <202302281610.31SGANW3096422@gitrepo.freebsd.org>
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The branch main has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=092a543ec3d276e48da09538ae29c736fdce4631 commit 092a543ec3d276e48da09538ae29c736fdce4631 Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2023-02-28 16:09:26 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2023-02-28 16:10:04 +0000 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 --- share/man/man4/dtrace_kinst.4 | 14 +++++++------- 1 file 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
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