wireguard-linux/arch/csky/kernel/ptrace.c, branch jd/unified-crypt-queue

csky: Implement ptrace regs and stack API

2020-03-08T12:55:14Z

Needed for kprobes support. Copied and adapted from Patrick's patch, but it has been modified for csky's pt_regs. ref: https://lore.kernel.org/linux-riscv/1572919114-3886-2-git-send-email-vincent.chen@sifive.com/raw Signed-off-by: Guo Ren Cc: Patrick Staehlin

csky/syscall_trace: Fixup return processing flow

2019-04-22T07:55:28Z

The function tracehook_report_syscall_entry's return value is __must_check attribute. We should add return processing flow in ptrace.c and set the syscall number to -1 when failed just like riscv's. Signed-off-by: Guo Ren Cc: Arnd Bergmann

csky: Update syscall_trace_enter/exit implementation

2019-04-22T05:44:57Z

Previous syscall_trace implementation couldn't support AUDITSYSCALL and SYSCALL_TRACEPOINTS. Now we redesign it to support audit_syscall and syscall_tracepoints just like other archs'. Signed-off-by: Guo Ren Cc: Dmitry V. Levin Cc: Arnd Bergmann

csky: Fixup wrong pt_regs size

2019-02-13T01:48:14Z

The bug is from commit 2054f4af1957 ("csky: bugfix gdb coredump error.") We change the ELF_NGREG to ELF_NGREG - 2 to fit gdb&gcc define, but forgot modify ptrace regset. Now coredump use ELF_NRGEG to parse GPRs and ptrace use pt_regs_regset, so there are two different reg_sets for userspace. Signed-off-by: Guo Ren

csky: remove unused members in processor.h

2018-12-31T15:16:00Z

Cleanup struct cpuinfo_csky and struct thread_struct, remove all esp0 related code. We could get pt_regs from sp and backtrace could use fp in switch_stack. Signed-off-by: Guo Ren

csky: optimize kernel panic print.

2018-12-31T15:15:38Z

Use STACKTRACE to optimize panic print more pretty and align registers printing. Signed-off-by: Guo Ren

csky: fixup save hi,lo,dspcr regs in switch_stack.

2018-12-31T14:57:27Z

HI, LO, DSPCR registers are 807/810 related regs and no need for 610/860. All of the regs must be saved in pt_regs and switch_stack. This patch fixup saving dspcr reg in switch_stack and pt_regs. Signed-off-by: Guo Ren

csky: Debug and Ptrace GDB

2018-10-25T16:54:25Z

This patch adds arch ptrace implementation, stack dump and bug.h. Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann