Hi, David Mair Thank you for the fix. 在 2020年09月11日 00:00, crash-utility-request@xxxxxxxxxx 写道: > Message: 2 > Date: Thu, 10 Sep 2020 09:35:34 +0000 > From: HAGIO KAZUHITO(?????) <k-hagio-ab@xxxxxxx> > To: "Discussion list for crash utility usage, maintenance and > development" <crash-utility@xxxxxxxxxx> > Subject: Re: [PATCH v3] x86_64_exception_frame only > performs EFRAME_VERIFY if it is the only flag > Message-ID: > <OSBPR01MB19919A04D573C74CD0727B82DD270@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> > > Content-Type: text/plain; charset="iso-2022-jp" > > -----Original Message----- >> Hi Kazu, >> >> I swear that last week I couldn't build past: >> >> verify_addr = (local - bt->stackbuf) + bt->stackbase; >> >> without a gcc error on the two char * in the parentheses being >> used in a ulong assignment. Last week it required casts on both >> char * to build for me. This week build of the same workspace >> of expanded source works through the same line without any casts. >> Below is a patch to replace the one in this thread's header post. >> It is cleaned of the casts I previously had in the line above. >> It builds fixes the problems I described in this thread's header >> and is unmodified other than removal of the casts I previously >> had in the line above. > OK, so for the following patch and the v3 commit message [1] > without its last paragraph about the cast to uintptr_t, > > Acked-by: Kazuhito Hagio <k-hagio-ab@xxxxxxx> > > Please wait for another ack. > > [1] https://www.redhat.com/archives/crash-utility/2020-September/msg00016.html > > Thanks, > Kazu > >> I'm sorry for the trouble getting it tidy. >> >> Signed-off-by: David Mair <dmair@xxxxxxxx> >> --- >> diff --git a/x86_64.c b/x86_64.c >> index fc05e8a..dec3730 100644 >> --- a/x86_64.c >> +++ b/x86_64.c >> @@ -4412,15 +4412,20 @@ x86_64_exception_frame(ulong flags, ulong kvaddr, char *local, >> long r8, r9, r10, r11, r12, r13, r14, r15; >> struct machine_specific *ms; >> struct syment *sp; >> - ulong offset; >> + ulong offset, verify_addr; >> char *pt_regs_buf; >> long verified; >> long err; >> char buf[BUFSIZE]; >> >> - if (flags == EFRAME_VERIFY) { >> - if (!accessible(kvaddr) || >> - !accessible(kvaddr + SIZE(pt_regs) - sizeof(long))) Actually, that would be good to have a simple code comment for this change. Anyway, this fix looks good to me. Acked-by: Lianbo Jiang <lijiang@xxxxxxxxxx> >> + if (flags & EFRAME_VERIFY) { >> + if (kvaddr) >> + verify_addr = kvaddr; >> + else >> + verify_addr = (local - bt->stackbuf) + bt->stackbase; >> + >> + if (!accessible(verify_addr) || >> + !accessible(verify_addr + SIZE(pt_regs) - sizeof(long))) >> return FALSE; >> } >> >> >> -- >> Crash-utility mailing list >> Crash-utility@xxxxxxxxxx >> https://www.redhat.com/mailman/listinfo/crash-utility -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
