Date: Mon, 7 Jul 1997 00:00:03 -0700 (PDT) From: Bruce Evans <bde@zeta.org.au> To: freebsd-bugs Subject: Re: gnu/4042: gdb stackframe in static library shows not the calling function Message-ID: <199707070700.AAA28996@hub.freebsd.org>
next in thread | raw e-mail | index | archive | help
The following reply was made to PR gnu/4042; it has been noted by GNATS. From: Bruce Evans <bde@zeta.org.au> To: bde@zeta.org.au, peter@spinner.dialix.com.au Cc: freebsd-gnats-submit@hub.freebsd.org Subject: Re: gnu/4042: gdb stackframe in static library shows not the calling function Date: Mon, 7 Jul 1997 16:50:56 +1000 >> This is caused by the function in the example (strlen) not having a frame >> pointer. The top frame or two gets lost. The problem is most obvious >How much overhead will it be to do the stack frame linkage correctly? As >I see it, it'll mean adding something like this: Not much, unless you count source bloat. >ENTRY(foo) >+ pushl %ebp >+ movl %esp,%ebp > .... >+ leave > ret "Correctly" requires ifdefs for -fomit-frame-pointer, -m486, etc. :-) Bruce
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199707070700.AAA28996>