Date: Thu, 12 Sep 2024 01:05:34 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 281433] Changing kern.elf64 sysctl's requires press-button reboot Message-ID: <bug-281433-227-9DPJvBPJBK@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-281433-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=281433 --- Comment #3 from dewayne@heuristicsystems.com.au --- (In reply to Konstantin Belousov from comment #1) I'm really impressed that you were able to identify the problem, and so quickly. Thank-you. Could you provide a hint how I can fix? So that I can disable this feature, I need to find where/how PT_GNU_STACK is revealed on my 14.0 boxes using clang version 16.0.6, LLD 16.0.6. My futile attempts involved: # objdump -T -t `which whoami`|grep -i -e stack -e gnu 0000000000000000 DO *UND* 0000000000000000 (FBSD_1.0) __stack_chk_guard 0000000000000000 DF *UND* 0000000000000000 (FBSD_1.0) __stack_chk_fail # readelf -a `which whoami` |grep -i -e stack -e gnu -e id GNU_RELRO 0x0000000000002540 0x0000000000004540 0x0000000000004540 GNU_EH_FRAME 0x00000000000014ac 0x00000000000014ac 0x00000000000014ac GNU_STACK 0x0000000000000000 0x0000000000000000 0x0000000000000000 ... 27: 0000000000000000 0 OBJECT GLOBAL DEFAULT UND __stack_chk_guard@FBSD_1.0 (3) 31: 0000000000000000 0 FUNC GLOBAL DEFAULT UND __stack_chk_fail@FBSD_1.0 (3) GNU 0x00000010 NT_GNU_BUILD_ID (Build id set by ld(1)) Build ID: ef0defaeb38f943913d65e8474989b1c # objdump -T -t /libexec/ld-elf.so.1 | grep -i -e stack -e gnu -e id 000000000000e260 g DF .text 0000000000000007 FBSDprivate_1.0 _rtld_get_stack_prot Nothing helpful. (I also tried hd and ktrace) So is there a clue from my /etc/make*.conf # make -C /usr/src -VCFLAGS -Vspace -VLDFLAGS -O2 -pipe -march=haswell -fomit-frame-pointer -fno-signed-zeros -g0 -ggdb0 -DSTRIP_FBSDID -UDEBUGGING -DNDEBUG -Qunused-arguments -Wno-error=unused-command-line-argument -Wno-error=unknown-warning-option -fno-common -fno-asynchronous-unwind-tables -Wl,-zrelro -Wl,-znow -Wl,--strip-debug -Wl,--build-id=md5 -Wl,--hash-style=sysv -DPIC -fpie -Wl,-zrelro -Wl,-znow -Wl,--strip-debug -Wl,--build-id=md5 -Wl,--hash-style=sysv -pie -- You are receiving this mail because: You are the assignee for the bug.home | help
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