Changes in traps.c

f717a8d1 - arch: include linux/cpu.h for trap_init() prototype

Mon, 06 Nov 2023 09:44:55 +0000

arch: include linux/cpu.h for trap_init() prototypesome architectures run into a -Wmissing-prototypes warningfor trap_init()arch/microblaze/kernel/traps.c:21:6: warning: no previous prototype for 'trap_init' [-Wmissing-prototypes]Include the right header to avoid this consistently, removingthe extra declarations on m68k and x86 that were added as localworkarounds already.Signed-off-by: Arnd Bergmann List of files: /linux-6.15/arch/csky/kernel/traps.c

751971af - csky: Fix function name in csky_alignment() and die()

Mon, 27 Dec 2021 18:48:51 +0000

csky: Fix function name in csky_alignment() and die()When building ARCH=csky defconfig:arch/csky/kernel/traps.c: In function 'die':arch/csky/kernel/traps.c:112:17: error: implicit declaration of function'make_dead_task' [-Werror=implicit-function-declaration] 112 | make_dead_task(SIGSEGV); | ^~~~~~~~~~~~~~The function's name is make_task_dead(), change it so there is no morebuild error.Fixes: 0e25498f8cd4 ("exit: Add and use make_task_dead.")Signed-off-by: Nathan Chancellor Reviewed-by: Guo Ren Link: https://lkml.kernel.org/r/20211227184851.2297759-4-nathan@kernel.orgSigned-off-by: Eric W. Biederman List of files: /linux-6.15/arch/csky/kernel/traps.c

0e25498f - exit: Add and use make_task_dead.

Mon, 28 Jun 2021 19:52:01 +0000

exit: Add and use make_task_dead.There are two big uses of do_exit. The first is it's design use to bethe guts of the exit(2) system call. The second use is to terminatea task after something catastrophic has happened like a NULL pointerin kernel code.Add a function make_task_dead that is initialy exactly the same asdo_exit to cover the cases where do_exit is called to handlecatastrophic failure. In time this can probably be reduced to just alight wrapper around do_task_dead. For now keep it exactly the same sothat there will be no behavioral differences introducing this newconcept.Replace all of the uses of do_exit that use it for catastraphictask cleanup with make_task_dead to make it clear what the codeis doing.As part of this rename rewind_stack_do_exitrewind_stack_and_make_dead.Signed-off-by: "Eric W. Biederman" List of files: /linux-6.15/arch/csky/kernel/traps.c

a0793fda - csky: fix typo of fpu config macro

Mon, 01 Nov 2021 15:05:02 +0000

csky: fix typo of fpu config macroFix typo which will cause fpe and privilege exception error.Signed-off-by: Kelly Devilliv Cc: stable Signed-off-by: Guo Ren List of files: /linux-6.15/arch/csky/kernel/traps.c

b0ae5e26 - csky: Remove prologue of page fault handler in entry.S

Thu, 24 Dec 2020 02:02:55 +0000

csky: Remove prologue of page fault handler in entry.SThere is a prologue on page fault handler which marking pages dirtyand/or accessed in page attributes, but all of these have beenhandled in handle_pte_fault. - Add flush_tlb_one in vmalloc page fault instead of prologue. - Using cmxchg_fixup C codes in do_page_fault instead of ASM one.Signed-off-by: Guo Ren List of files: /linux-6.15/arch/csky/kernel/traps.c

5bc46ce2 - csky: Optimize the trap processing flow

Thu, 30 Jul 2020 11:09:51 +0000

csky: Optimize the trap processing flow - Seperate different trap functions - Add trap_no() - Remove panic code print - Redesign die_if_kerenl to die with riscv's - Print exact trap info for app segment fault[ 17.389321] gzip[126]: unhandled signal 11 code 0x3 at 0x0007835a in busybox[8000+d4000][ 17.393882][ 17.393882] CURRENT PROCESS:[ 17.393882][ 17.394309] COMM=gzip PID=126[ 17.394513] TEXT=00008000-000db2e4 DATA=000dcf14-000dd1ad BSS=000dd1ad-000ff000[ 17.395499] USER-STACK=7f888e50 KERNEL-STACK=bf130300[ 17.395499][ 17.396801] PC: 0x0007835a (0x7835a)[ 17.397048] LR: 0x000058b4 (0x58b4)[ 17.397285] SP: 0xbe519f68[ 17.397555] orig_a0: 0x00002852[ 17.397886] PSR: 0x00020341[ 17.398356] a0: 0x00002852 a1: 0x000f2f5a a2: 0x0000d7ae a3: 0x0000005d[ 17.399289] r4: 0x000de150 r5: 0x00000002 r6: 0x00000102 r7: 0x00007efa[ 17.399800] r8: 0x7f888bc4 r9: 0x00000001 r10: 0x000002eb r11: 0x0000aac1[ 17.400166] r12: 0x00002ef2 r13: 0x00000007 r15: 0x000058b4[ 17.400531] r16: 0x0000004c r17: 0x00000031 r18: 0x000f5816 r19: 0x000e8068[ 17.401006] r20: 0x000f5818 r21: 0x000e8068 r22: 0x000f5918 r23: 0x90000000[ 17.401721] r24: 0x00000031 r25: 0x000000c8 r26: 0x00000000 r27: 0x00000000[ 17.402199] r28: 0x2ac2a000 r29: 0x00000000 r30: 0x00000000 tls: 0x2aadbaa8[ 17.402686] hi: 0x00120340 lo: 0x7f888bec/etc/init.ci/ntfs3g_run: line 61: 126 Segmentation fault gzip -c -9 /mnt/test.bin > /mnt/test_bin.gzSigned-off-by: Guo Ren Cc: Arnd Bergmann List of files: /linux-6.15/arch/csky/kernel/traps.c

8f6bb793 - csky: Add uprobes support

Thu, 02 Apr 2020 11:52:27 +0000

csky: Add uprobes supportThis patch adds support for uprobes on csky architecture.Just like kprobe, it support single-step and simulate instructions.Signed-off-by: Guo Ren Cc: Arnd Bergmann Cc: Steven Rostedt (VMware) List of files: /linux-6.15/arch/csky/kernel/traps.c

33e53ae1 - csky: Add kprobes supported

Wed, 01 Apr 2020 01:17:02 +0000

csky: Add kprobes supportedThis patch enable kprobes, kretprobes, ftrace interface. It utilizedsoftware breakpoint and single step debug exceptions, instructionssimulation on csky.We use USR_BKPT replace origin instruction, and the kprobe handlerprepares an excutable memory slot for out-of-line execution with acopy of the original instruction being probed. Most of instructionscould be executed by single-step, but some instructions need originpc value to execute and we need software simulate these instructions.Signed-off-by: Guo Ren Cc: Arnd Bergmann Cc: Steven Rostedt (VMware) List of files: /linux-6.15/arch/csky/kernel/traps.c

9c0e343d - csky: Fixup get wrong psr value from phyical reg

Tue, 31 Mar 2020 15:45:52 +0000

csky: Fixup get wrong psr value from phyical regWe should get psr value from regs->psr in stack, not directly getit from phyiscal register then save the vector number intsk->trap_no.Signed-off-by: Guo Ren List of files: /linux-6.15/arch/csky/kernel/traps.c

3158d289 - csky: Fixup no panic in kernel for some traps

Fri, 10 May 2019 09:07:01 +0000

csky: Fixup no panic in kernel for some trapsThese traps couldn't be hanppen in kernel and we must panic there notsend a signal to userspace.Signed-off-by: Guo Ren Cc: Arnd Bergmann List of files: /linux-6.15/arch/csky/kernel/traps.c

2e1661d2 - signal: Remove the task parameter from force_sig_fault

Thu, 23 May 2019 16:04:24 +0000

signal: Remove the task parameter from force_sig_faultAs synchronous exceptions really only make sense against the currenttask (otherwise how are you synchronous) remove the task parameterfrom from force_sig_fault to make it explicit that is what is goingon.The two known exceptions that deliver a synchronous exception to astopped ptraced task have already been changed toforce_sig_fault_to_task.The callers have been changed with the following emacs regular expression(with obvious variations on the architectures that take more arguments)to avoid typos:force_sig_fault[(]\([^,]+\)[,]\([^,]+\)[,]\([^,]+\)[,]\W+current[)]->force_sig_fault(\1,\2,\3)Signed-off-by: "Eric W. Biederman" List of files: /linux-6.15/arch/csky/kernel/traps.c

17a68777 - csky: remove unused members in processor.h

Sun, 09 Dec 2018 09:31:53 +0000

csky: remove unused members in processor.hCleanup struct cpuinfo_csky and struct thread_struct, remove all esp0related code. We could get pt_regs from sp and backtrace could use fpin switch_stack.Signed-off-by: Guo Ren List of files: /linux-6.15/arch/csky/kernel/traps.c

081860b9 - csky: Exception handling and mm-fault

Wed, 05 Sep 2018 06:25:08 +0000

csky: Exception handling and mm-faultThis patch adds exception handling code, cpuinfo and mm-fault code.Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann List of files: /linux-6.15/arch/csky/kernel/traps.c