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adf1423698
kernel-ark/arch/x86_64/kernel
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Jan Beulich adf1423698 [PATCH] i386/x86-64: Work around gcc bug with noreturn functions in unwinder 
Current gcc generates calls not jumps to noreturn functions. When that happens the
return address can point to the next function, which confuses the unwinder.

This patch works around it by marking asynchronous exception
frames in contrast normal call frames in the unwind information.  Then teach
the unwinder to decode this.

For normal call frames the unwinder now subtracts one from the address which avoids
this problem.  The standard libgcc unwinder uses the same trick.

It doesn't include adjustment of the printed address (i.e. for the original
example, it'd still be kernel_math_error+0 that gets displayed, but the
unwinder wouldn't get confused anymore.

This only works with binutils 2.6.17+ and some versions of H.J.Lu's 2.6.16
unfortunately because earlier binutils don't support .cfi_signal_frame

[AK: added automatic detection of the new binutils and wrote description]

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26 10:52:41 +02:00
..
acpi Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
cpufreq
aperture.c [PATCH] Insert GART region into resource map 2006-09-26 10:52:40 +02:00
apic.c [PATCH] insert IOAPIC(s) and Local APIC into resource map 2006-09-26 10:52:39 +02:00
asm-offsets.c
audit.c [PATCH] audit: AUDIT_PERM support 2006-09-11 13:32:30 -04:00
crash_dump.c
crash.c [PATCH] Remove all ifdefs for local/io apic 2006-09-26 10:52:29 +02:00
e820.c [PATCH] Remove non e820 fallbacks in high level code 2006-09-26 10:52:37 +02:00
early_printk.c [PATCH] Convert x86-64 to early param 2006-09-26 10:52:32 +02:00
early-quirks.c [PATCH] Move early chipset quirks out to new file 2006-09-26 10:52:30 +02:00
entry.S [PATCH] i386/x86-64: Work around gcc bug with noreturn functions in unwinder 2006-09-26 10:52:41 +02:00
functionlist [NET]: make skb_release_data() static 2006-06-29 16:58:30 -07:00
genapic_cluster.c [PATCH] remove int_delivery_dest 2006-09-26 10:52:31 +02:00
genapic_flat.c [PATCH] Replace local_save_flags+local_irq_disable with 2006-09-26 10:52:33 +02:00
genapic.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
head64.c [PATCH] Remove need for early lockdep init 2006-09-26 10:52:32 +02:00
head.S [PATCH] Reload CS when startup_64 is used. 2006-09-26 10:52:38 +02:00
i387.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
i8259.c [PATCH] x86: - restore i8259A eoi status on resume 2006-09-26 10:52:41 +02:00
init_task.c [PATCH] x86_64: Save original IST values for checking stack addresses 2006-08-30 16:05:16 -07:00
io_apic.c [PATCH] Remove APIC version/cpu capability mpparse checking/printing 2006-09-26 10:52:37 +02:00
ioport.c [PATCH] x86-64 TIF flags for debug regs and io bitmap in ctxsw 2006-09-26 10:52:28 +02:00
irq.c [PATCH] Remove apic mismatch counter 2006-09-26 10:52:29 +02:00
k8.c
kprobes.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ldt.c
machine_kexec.c [PATCH] Avoid overwriting the current pgd (V4, x86_64) 2006-09-26 10:52:38 +02:00
Makefile [PATCH] Move early chipset quirks out to new file 2006-09-26 10:52:30 +02:00
mce_amd.c [PATCH] cpu hotplug: use hotplug version of registration in late inits 2006-07-31 13:28:39 -07:00
mce_intel.c
mce.c [PATCH] Remove safe_smp_processor_id() 2006-09-26 10:52:37 +02:00
module.c
mpparse.c [PATCH] Fix coding style and output of the mptable parser 2006-09-26 10:52:37 +02:00
nmi.c [PATCH] x86: i386/x86-64 Add nmi watchdog support for new Intel CPUs 2006-09-26 10:52:27 +02:00
pci-calgary.c [PATCH] Calgary IOMMU: eradicate sole remaining 80 chars per line offender 2006-09-26 10:52:33 +02:00
pci-dma.c [PATCH] Convert x86-64 to early param 2006-09-26 10:52:32 +02:00
pci-gart.c [PATCH] remove superflous BUG_ON's in nommu and gart 2006-09-26 10:52:32 +02:00
pci-nommu.c [PATCH] remove superflous BUG_ON's in nommu and gart 2006-09-26 10:52:32 +02:00
pci-swiotlb.c [PATCH] x86_64: Fix swiotlb=force 2006-07-29 20:59:55 -07:00
pmtimer.c
process.c [PATCH] Fix idle notifiers 2006-09-26 10:52:40 +02:00
ptrace.c [PATCH] i386/x86-64: rename is_at_popf(), add iret to tests and fix 2006-09-26 10:52:33 +02:00
reboot.c
relocate_kernel.S [PATCH] Avoid overwriting the current pgd (V4, x86_64) 2006-09-26 10:52:38 +02:00
setup64.c [PATCH] Remove most of the special cases for the debug IST stack 2006-09-26 10:52:38 +02:00
setup.c [PATCH] Don't synchronize time reading on single core AMD systems 2006-09-26 10:52:41 +02:00
signal.c [PATCH] Remove all traces of signal number conversion 2006-09-26 10:52:41 +02:00
smp.c [PATCH] Remove safe_smp_processor_id() 2006-09-26 10:52:37 +02:00
smpboot.c [PATCH] Convert x86-64 to early param 2006-09-26 10:52:32 +02:00
stacktrace.c [PATCH] Merge stacktrace and show_trace 2006-09-26 10:52:34 +02:00
suspend_asm.S
suspend.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
sys_x86_64.c
syscall.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tce.c [PATCH] Calgary IOMMU: consolidate per bus data structures 2006-09-26 10:52:31 +02:00
time.c [PATCH] Detect clock skew during suspend 2006-09-26 10:52:37 +02:00
trampoline.S [PATCH] Fix gdt table size in trampoline.S 2006-09-26 10:52:32 +02:00
traps.c [PATCH] Don't use kernel_text_address in oops context 2006-09-26 10:52:38 +02:00
vmlinux.lds.S [PATCH] Mark per cpu data initialization __initdata again 2006-09-26 10:52:40 +02:00
vsmp.c
vsyscall.c [PATCH] Add sparse annotation to vsyscall.c 2006-09-26 10:52:33 +02:00
x8664_ksyms.c [PATCH] Fix zeroing on exception in copy_*_user 2006-09-26 10:52:39 +02:00