Re: toolchain/46476: on i386, gdb silently fails to set a breakpoint on PaX-MPROTECTed binary

[christos%zoulas.com@localhost (Christos Zoulas)]

On May 23,  4:45pm, dyoung%ojctech.com@localhost (dyoung%ojctech.com@localhost) 
wrote:
-- Subject: toolchain/46476: on i386, gdb silently fails to set a breakpoint 

Works on current, what version is it broken (kernel version, userland version,
gdb version)?

GNU gdb (GDB) 7.3.1
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
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This GDB was configured as "i486--netbsdelf".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from 
/net/shiny/src-6/NetBSD/cvsroot/src/external/gpl3/gdb/bin/gdb/hello...done.
(gdb) break main
Breakpoint 1 at 0x8048709: file hello.c, line 6.
(gdb) r
Starting program: 
/net/shiny/src-6/NetBSD/cvsroot/src/external/gpl3/gdb/bin/gdb/hello 
Warning:
Cannot insert breakpoint 1.
Error accessing memory address 0x8048709: Input/output error.
Cannot insert breakpoint -1.
Temporarily disabling shared library breakpoints:
breakpoint #-1

(gdb) q