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

To: christos%NetBSD.org@localhost, netbsd-bugs%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, kamil%NetBSD.org@localhost, dyoung%ojctech.com@localhost
Subject: Re: toolchain/46476 (on i386, gdb silently fails to set a breakpoint on PaX-MPROTECTed binary)
From: kamil%NetBSD.org@localhost
Date: Fri, 6 Oct 2017 21:35:22 +0000 (UTC)

Synopsis: on i386, gdb silently fails to set a breakpoint on PaX-MPROTECTed binary

State-Changed-From-To: open->closed
State-Changed-By: kamil%NetBSD.org@localhost
State-Changed-When: Fri, 06 Oct 2017 23:35:21 +0200
State-Changed-Why:
GDB and any other debugger via ptrace(2) can set breakpoints now with PaX MPROTECT

$ sysctl -d security.pax.mprotect.ptrace                                                                                                                                               
security.pax.mprotect.ptrace: When enabled, allow ptrace(2) to override mprotect permissions on traced processes

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