BMC/Intel-BMC/linux.git/arch/xtensa/kernel/traps.c, branch dev-4.17

signal/xtensa: Consistenly use SIGBUS in do_unaligned_user

2018-07-03T09:26:46+00:00

commit 7de712ccc096b81d23cc0a941cd9b8cb3956605d upstream. While working on changing this code to use force_sig_fault I discovered that do_unaliged_user is sets si_signo to SIGBUS and passes SIGSEGV to force_sig_info. Which is just b0rked. The code is reporting a SIGBUS error so replace the SIGSEGV with SIGBUS. Cc: Chris Zankel Cc: Max Filippov Cc: linux-xtensa@linux-xtensa.org Cc: stable@vger.kernel.org Acked-by: Max Filippov Fixes: 5a0015d62668 ("[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 3") Signed-off-by: "Eric W. Biederman" Signed-off-by: Greg Kroah-Hartman

xtensa: clean up exception handling structure

2017-12-17T06:37:09+00:00

Instead of using flat array of longs use normal C structure and generate EXC_TABLE_* constants in the asm-offsets.c Signed-off-by: Max Filippov

xtensa: clean up custom-controlled debug output

2017-12-17T06:37:08+00:00

Replace #ifdef'fed/commented out debug printk statements with pr_debug. Replace printk statements with pr_* equivalents. Signed-off-by: Max Filippov

xtensa: fix stack dump output

2017-03-31T22:58:40+00:00

Use %pB in pr_cont format string instead of calling print_symbol separately. It turns [ 19.166249] Call Trace: [ 19.167265] [] [ 19.167843] __warn+0x92/0xa0 [ 19.169656] [] [ 19.170059] warn_slowpath_fmt+0x3c/0x40 [ 19.171934] [] back into [ 18.123240] Call Trace: [ 18.125039] [] __warn+0x92/0xa0 [ 18.126961] [] warn_slowpath_fmt+0x3c/0x40 Signed-off-by: Max Filippov

sched/headers: Prepare to move kstack_end() from to

2017-03-02T07:42:39+00:00

But first update the usage sites with the new header dependency. Acked-by: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:34+00:00

We are going to split out of , which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder file that just maps to to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:29+00:00

Replace with globally

2016-12-24T19:46:01+00:00

This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*' sed -i -e "s!$PATT!#include !" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro Signed-off-by: Linus Torvalds

xtensa: clean up printk usage for boot/crash logging

2016-11-07T07:31:46+00:00

Convert printk(KERN_* to pr_* and printk's without level to pr_cont. This fixes torn register dumps, stack dumps, stack traces and timestamps in the middle of 'Calibrating CPU frequency' message. Also drop unused show_code and drop false comment about show_stack. Signed-off-by: Max Filippov

xtensa: support hardware breakpoints/watchpoints

2016-03-11T08:53:32+00:00

Use perf framework to manage hardware instruction and data breakpoints. Add two new ptrace calls: PTRACE_GETHBPREGS and PTRACE_SETHBPREGS to query and set instruction and data breakpoints. Address bit 0 choose instruction (0) or data (1) break register, bits 31..1 are the register number. Both calls transfer two 32-bit words: address (0) and control (1). Instruction breakpoint contorl word is 0 to clear breakpoint, 1 to set. Data breakpoint control word bit 31 is 'trigger on store', bit 30 is 'trigger on load, bits 29..0 are length. Length 0 is used to clear a breakpoint. To set a breakpoint length must be a power of 2 in the range 1..64 and the address must be length-aligned. Introduce new thread_info flag: TIF_DB_DISABLED. Set it if debug exception is raised by the kernel code accessing watched userspace address and disable corresponding data breakpoint. On exit to userspace check that flag and, if set, restore all data breakpoints. Handle debug exceptions raised with PS.EXCM set. This may happen when window overflow/underflow handler or fast exception handler hits data breakpoint, in which case save and disable all data breakpoints, single-step faulting instruction and restore data breakpoints. Signed-off-by: Max Filippov