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71e308a239
linux/arch/powerpc/kernel
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Steven Rostedt 71e308a239 function-graph: add stack frame test 
In case gcc does something funny with the stack frames, or the return
from function code, we would like to detect that.

An arch may implement passing of a variable that is unique to the
function and can be saved on entering a function and can be tested
when exiting the function. Usually the frame pointer can be used for
this purpose.

This patch also implements this for x86. Where it passes in the stack
frame of the parent function, and will test that frame on exit.

There was a case in x86_32 with optimize for size (-Os) where, for a
few functions, gcc would align the stack frame and place a copy of the
return address into it. The function graph tracer modified the copy and
not the actual return address. On return from the funtion, it did not go
to the tracer hook, but returned to the parent. This broke the function
graph tracer, because the return of the parent (where gcc did not do
this funky manipulation) returned to the location that the child function
was suppose to. This caused strange kernel crashes.

This test detected the problem and pointed out where the issue was.

This modifies the parameters of one of the functions that the arch
specific code calls, so it includes changes to arch code to accommodate
the new prototype.

Note, I notice that the parsic arch implements its own push_return_trace.
This is now a generic function and the ftrace_push_return_trace should be
used instead. This patch does not touch that code.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2009-06-18 18:40:18 -04:00
..
vdso32 powerpc/mm: Introduce MMU features 2008-12-21 14:21:16 +11:00
vdso64 powerpc/mm: Introduce MMU features 2008-12-21 14:21:16 +11:00
.gitignore powerpc: Ignore generated vmlinux.lds in git 2008-10-07 14:26:18 +11:00
align.c powerpc: Fix load/store float double alignment handler 2009-02-26 14:02:53 +11:00
asm-offsets.c Merge branch 'linus' into perfcounters/core-v2 2009-04-06 09:02:57 +02:00
audit.c
btext.c powerpc: Use the common ascii hex helpers 2008-08-20 16:34:57 +10:00
cacheinfo.c powerpc/cacheinfo: Rename cache_dir per-cpu variable 2009-01-13 14:48:02 +11:00
cacheinfo.h powerpc: Rewrite sysfs processor cache info code 2009-01-08 16:25:10 +11:00
clock.c
compat_audit.c
cpu_setup_6xx.S powerpc/mm: e300c2/c3/c4 TLB errata workaround 2009-03-24 13:47:32 +11:00
cpu_setup_44x.S AMCC PPC 460SX redwood SoC platform initial framework 2009-02-14 14:41:29 -05:00
cpu_setup_fsl_booke.S powerpc/fsl-booke: Cleanup init/exception setup to be runtime 2009-01-28 18:16:50 -06:00
cpu_setup_pa6t.S
cpu_setup_ppc970.S powerpc: Use LOAD_REG_IMMEDIATE only for constants on 64-bit 2008-09-15 11:08:35 -07:00
cputable.c powerpc/pseries: Really fix the oprofile CPU type on pseries 2009-05-15 16:43:42 +10:00
crash_dump.c powerpc: Unify opcode definitions and support 2009-02-23 10:48:56 +11:00
crash.c powerpc: Increase CRASH_HANDLER_MAX 2008-06-30 22:31:00 +10:00
dbell.c powerpc: Add support for using doorbells for SMP IPI 2009-02-23 15:53:03 +11:00
dma-iommu.c powerpc: Change u64/s64 to a long long integer type 2009-01-13 14:47:59 +11:00
dma.c powerpc: Fix up dma_alloc_coherent() on platforms without cache coherency. 2009-05-27 16:33:59 +10:00
entry_32.S powerpc: Unify opcode definitions and support 2009-02-23 10:48:56 +11:00
entry_64.S Merge branch 'linus' into perfcounters/core-v2 2009-04-06 09:02:57 +02:00
firmware.c
fpu.S powerpc: Disable VSX or current process in giveup_fpu/altivec 2009-04-07 15:18:59 +10:00
ftrace.c function-graph: add stack frame test 2009-06-18 18:40:18 -04:00
head_8xx.S powerpc: convert to use __HEAD and HEAD_TEXT macros. 2009-04-26 09:20:38 -07:00
head_32.S powerpc: convert to use __HEAD and HEAD_TEXT macros. 2009-04-26 09:20:38 -07:00
head_40x.S powerpc: convert to use __HEAD and HEAD_TEXT macros. 2009-04-26 09:20:38 -07:00
head_44x.S powerpc: convert to use __HEAD and HEAD_TEXT macros. 2009-04-26 09:20:38 -07:00
head_64.S powerpc/kconfig: Kill PPC_MULTIPLATFORM 2009-03-11 17:11:35 +11:00
head_booke.h Merge commit 'jwb/next' into next 2009-03-03 13:30:03 +11:00
head_fsl_booke.S powerpc: convert to use __HEAD and HEAD_TEXT macros. 2009-04-26 09:20:38 -07:00
ibmebus.c powerpc: struct device - replace bus_id with dev_name(), dev_set_name() 2008-12-16 15:53:38 +11:00
idle_6xx.S powerpc: Fix for getting CPU number in power_save_ppc32_restore() 2008-09-03 20:53:47 +10:00
idle_e500.S powerpc: Fix for getting CPU number in power_save_ppc32_restore() 2008-09-03 20:53:47 +10:00
idle_power4.S
idle.c powerpc: ftrace, do not latency trace idle 2008-11-20 10:51:15 -08:00
init_task.c take init_fs to saner place 2008-12-31 18:07:42 -05:00
io.c ftrace: support for PowerPC 2008-05-23 22:43:11 +02:00
iomap.c
iommu.c powerpc: Change u64/s64 to a long long integer type 2009-01-13 14:47:59 +11:00
irq.c perfcounters: remove powerpc definitions of perf_counter_do_pending 2009-06-11 20:03:13 -07:00
isa-bridge.c [POWERPC] Remove leftover printk in isa-bridge.c 2008-05-09 20:22:59 +10:00
kgdb.c kgdb, x86, arm, mips, powerpc: ignore user space single stepping 2008-09-26 10:36:41 -05:00
kprobes.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-01-07 11:31:52 -08:00
l2cr_6xx.S Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
legacy_serial.c powerpc/powermac: Fixup default serial port device for pmac_zilog 2008-07-28 16:30:53 +10:00
lparcfg.c powerpc/pseries: Add dispatch dispersion statistics 2009-04-07 15:18:59 +10:00
machine_kexec_32.c kexec jump: rename KEXEC_CONTROL_CODE_SIZE to KEXEC_CONTROL_PAGE_SIZE 2008-08-15 08:35:42 -07:00
machine_kexec_64.c powerpc/32: Setup OF properties for kdump 2008-12-23 15:13:29 +11:00
machine_kexec.c powerpc: Allow mem=x cmdline to work with 4G+ 2009-05-15 16:43:41 +10:00
Makefile perf_counters: powerpc: Add support for POWER7 processors 2009-06-11 16:48:37 +02:00
misc_32.S powerpc/44x: Support 16K/64K base page sizes on 44x 2008-12-29 09:53:25 +11:00
misc_64.S powerpc: Disable VSX or current process in giveup_fpu/altivec 2009-04-07 15:18:59 +10:00
misc.S powerpc: Use LOAD_REG_IMMEDIATE only for constants on 64-bit 2008-09-15 11:08:35 -07:00
module_32.c powerpc/ppc32: ftrace, dynamic ftrace to handle modules 2008-11-20 10:52:53 -08:00
module_64.c powerpc: Unify opcode definitions and support 2009-02-23 10:48:56 +11:00
module.c module: cleanup FIXME comments about trimming exception table entries. 2009-06-12 21:47:05 +09:30
msi.c powerpc/PCI: include pci.h in powerpc MSI implementation 2009-03-25 08:54:29 -07:00
nvram_64.c
of_device.c powerpc: struct device - replace bus_id with dev_name(), dev_set_name() 2008-12-16 15:53:38 +11:00
of_platform.c dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
paca.c powerpc: Update page-in counter for CMM 2008-11-05 22:08:28 +11:00
pci_32.c powerpc/pci: Fix PCI<->OF matching of old style multifunc devices 2009-02-23 10:48:57 +11:00
pci_64.c powerpc: Fix PCI ROM access 2009-05-15 16:43:42 +10:00
pci_dn.c [POWERPC] iSeries: eliminate pci_dn bussubno 2008-01-17 14:57:05 +11:00
pci-common.c powerpc: Fix PCI ROM access 2009-05-15 16:43:42 +10:00
perf_counter.c perf_counter: powerpc: Implement generalized cache events for POWER processors 2009-06-11 16:48:37 +02:00
pmc.c [POWERPC] Made FSL Book-E PMC support more generic 2008-02-05 23:34:14 -06:00
power4-pmu.c perf_counter: Rename L2 to LL cache 2009-06-11 17:54:17 +02:00
power5-pmu.c perf_counter: Rename L2 to LL cache 2009-06-11 17:54:17 +02:00
power5+-pmu.c perf_counter: Rename L2 to LL cache 2009-06-11 17:54:17 +02:00
power6-pmu.c perf_counter: Rename L2 to LL cache 2009-06-11 17:54:17 +02:00
power7-pmu.c powerpc, perf_counter: Fix performance counter event types 2009-06-12 14:21:11 +02:00
ppc32.h powerpc: Add VSX context save/restore, ptrace and signal support 2008-07-01 11:28:50 +10:00
ppc970-pmu.c perf_counter: Rename L2 to LL cache 2009-06-11 17:54:17 +02:00
ppc_ksyms.c powerpc: Export cacheable_memzero as its now used in a driver 2009-01-08 16:25:17 +11:00
ppc_save_regs.S powerpc: Prepare xmon_save_regs for use with kdump 2008-12-23 15:13:28 +11:00
proc_ppc64.c powerpc: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
process.c Simplify copy_thread() 2009-04-02 19:04:51 -07:00
prom_init_check.sh powerpc: Print linux_banner in prom_init 2009-03-11 17:11:33 +11:00
prom_init.c powerpc/pseries: Fix ibm,client-architecture comment 2009-04-07 15:18:59 +10:00
prom_parse.c powerpc: Fix of_node_put() exit path in of_irq_map_one() 2009-04-20 12:18:43 -06:00
prom.c powerpc: Allow mem=x cmdline to work with 4G+ 2009-05-15 16:43:41 +10:00
ptrace32.c powerpc: Fix ptrace compat wrapper for FPU register access 2009-04-07 15:19:00 +10:00
ptrace.c powerpc: Don't use the wrong thread_struct for ptrace get/set VSX regs 2008-07-30 15:26:54 +10:00
reloc_64.S powerpc: Make the 64-bit kernel as a position-independent executable 2008-09-15 11:08:38 -07:00
rtas_flash.c proc 2/2: remove struct proc_dir_entry::owner 2009-03-31 01:14:44 +04:00
rtas_pci.c powerpc/pci: Fix various pseries PCI hotplug issues 2008-11-06 09:31:52 +11:00
rtas-proc.c [POWERPC] Fix sparse warnings in arch/powerpc/kernel 2008-05-14 22:31:59 +10:00
rtas-rtc.c
rtas.c powerpc/pseries: Fix partition migration hang under load 2009-02-23 15:53:04 +11:00
setup_32.c powerpc/32: Wire up the trampoline code for kdump 2008-12-23 15:13:29 +11:00
setup_64.c powerpc/mm: Introduce early_init_mmu() on 64-bit 2009-03-24 13:47:34 +11:00
setup-common.c powerpc: Remove duplicated #include's 2009-04-07 15:18:58 +10:00
setup.h
signal_32.c powerpc: Sanitize stack pointer in signal handling code 2009-03-27 16:58:24 +11:00
signal_64.c powerpc: Sanitize stack pointer in signal handling code 2009-03-27 16:58:24 +11:00
signal.c powerpc: Sanitize stack pointer in signal handling code 2009-03-27 16:58:24 +11:00
signal.h powerpc: Sanitize stack pointer in signal handling code 2009-03-27 16:58:24 +11:00
smp-tbsync.c powerpc: Silence software timebase sync 2008-11-05 22:08:28 +11:00
smp.c Merge branch 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-01-02 11:44:09 -08:00
softemu8xx.c Remove asm/a.out.h files for all architectures without a.out support. 2008-09-06 19:30:24 +01:00
stacktrace.c powerpc: Removed duplicated include in stacktrace.c 2008-07-28 16:30:47 +10:00
suspend.c PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures 2008-07-24 10:47:21 -07:00
swsusp_32.S powerpc/mm: Introduce MMU features 2008-12-21 14:21:16 +11:00
swsusp_64.c
swsusp_asm64.S powerpc: Fix 64-bit hibernation with 64k pages 2008-10-07 14:26:20 +11:00
swsusp.c powerpc/mm: Split mmu_context handling 2008-12-21 14:21:15 +11:00
sys_ppc32.c compat: generic compat get/settimeofday 2008-10-16 11:21:33 -07:00
syscalls.c powerpc/mm: Add Strong Access Ordering support 2008-07-09 16:30:45 +10:00
sysfs.c powerpc: Fix bugs introduced by sysfs changes 2009-03-27 16:58:24 +11:00
systbl_chk.c [POWERPC] Fix a couple of copyright symbols 2008-01-25 22:52:50 +11:00
systbl_chk.sh [POWERPC] Fix a couple of copyright symbols 2008-01-25 22:52:50 +11:00
systbl.S
tau_6xx.c on_each_cpu(): kill unused 'retry' parameter 2008-06-26 11:24:38 +02:00
time.c clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
traps.c powerpc: Add support for using doorbells for SMP IPI 2009-02-23 15:53:03 +11:00
udbg_16550.c powerpc/udbg: Fix lost byte during console handover; change LFCR to CRLF 2009-03-11 17:11:34 +11:00
udbg.c powerpc/udbg: Fix lost byte during console handover; change LFCR to CRLF 2009-03-11 17:11:34 +11:00
vdso.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2008-12-28 16:54:33 -08:00
vecemu.c
vector.S
vio.c workqueue: add to_delayed_work() helper function 2009-04-02 19:04:50 -07:00
vmlinux.lds.S powerpc: Explicit alignment for .data.cacheline_aligned 2009-05-18 15:19:05 +10:00