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2015-03-31exceptions: Catch exceptions at boot timeBenjamin Herrenschmidt1-0/+2
And print some informations about GPR state, backtrace, etc... Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-11-22opal: Remove MCE handling code.Mahesh Salgaonkar1-1/+0
Removed following: - Machine check handle and other related routines. - per-cpu MCE event used to record machine check data cpu_thread->mc_event; - Machine check related definition including mce event structure from include/opal.h - A comment above GET_STACK() #define that warns about runtime modification made to GET_STACK macro by MC patching code. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-22opal: Remove machine check interrupt patching in OPAL.Mahesh Salgaonkar1-7/+1
Now that we catch/handle machine check interrupt directly in Linux host PowerNV kernel, we are not anymore dependent on OPAL firmware to do MCE handling job for us. The MCE handling code in OPAL has exclusive stack space (4k size) reserved and remains unused with Linux host not being dependent on it anymore. Hence, this patch removes the code that allows machine check interrupt patching in OPAL and reclaims back 4k of stack space for use of normal stack. For older kernel the patching request will result into an error. The subsequent patch will remove the rest of MCE handling code from OPAL. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-18Add symbolic backtraces and expose skiboot map to LinuxBenjamin Herrenschmidt1-1/+1
We use a double link technique, doing a first pass with a .o containing a dummy symbol map, then re-linking with a new .o Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-18Capture backtraces when measuring stack depthBenjamin Herrenschmidt1-2/+2
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-18Add functions to backtrace into a non-text bufferBenjamin Herrenschmidt1-0/+26
Separate text translation from capture of the backtrace Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-17Stack checking extensionsBenjamin Herrenschmidt1-0/+12
This patch adds: - Normal builds are done with -fstack-protector (we want to investigate using -fstack-protector-strong on gcc4.9 but for now we just use that - Build with STACK_CHECK=1 will use -fstack-protector-all and -pg and will check the stack in mcount Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-02Initial commit of Open Source releaseBenjamin Herrenschmidt1-0/+92
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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