kernel.git/arch/nds32/kernel/traps.c, branch linux-5.4.y

exit: Add and use make_task_dead.

2023-02-06T06:52:49Z

commit 0e25498f8cd43c1b5aa327f373dd094e9a006da7 upstream. There are two big uses of do_exit. The first is it's design use to be the guts of the exit(2) system call. The second use is to terminate a task after something catastrophic has happened like a NULL pointer in kernel code. Add a function make_task_dead that is initialy exactly the same as do_exit to cover the cases where do_exit is called to handle catastrophic failure. In time this can probably be reduced to just a light wrapper around do_task_dead. For now keep it exactly the same so that there will be no behavioral differences introducing this new concept. Replace all of the uses of do_exit that use it for catastraphic task cleanup with make_task_dead to make it clear what the code is doing. As part of this rename rewind_stack_do_exit rewind_stack_and_make_dead. Signed-off-by: "Eric W. Biederman" Signed-off-by: Eric Biggers Signed-off-by: Sasha Levin

signal: Remove the task parameter from force_sig_fault

2019-05-29T14:31:43Z

As synchronous exceptions really only make sense against the current task (otherwise how are you synchronous) remove the task parameter from from force_sig_fault to make it explicit that is what is going on. The two known exceptions that deliver a synchronous exception to a stopped ptraced task have already been changed to force_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"

signal: Explicitly call force_sig_fault on current

2019-05-29T14:31:43Z

Update the calls of force_sig_fault that pass in a variable that is set to current earlier to explicitly use current. This is to make the next change that removes the task parameter from force_sig_fault easier to verify. Signed-off-by: "Eric W. Biederman"

signal/nds32: Remove tsk parameter from send_sigtrap

2019-05-29T14:31:42Z

The send_sigtrap function is always called with tsk == current. Make that obvious by removing the tsk parameter. This also makes it clear that send_sigtrap always calls force_sig_fault on the current task. Signed-off-by: "Eric W. Biederman"

signal: Remove task parameter from force_sig

2019-05-27T14:36:28Z

All of the remaining callers pass current into force_sig so remove the task parameter to make this obvious and to make misuse more difficult in the future. This also makes it clear force_sig passes current into force_sig_info. Signed-off-by: "Eric W. Biederman"

nds32: nds32 FPU port

2018-11-22T10:13:13Z

This patch set contains basic components for supporting the nds32 FPU, such as exception handlers and context switch for FPU registers. By default, the lazy FPU scheme is supported and the user can configure it via CONFIG_LZAY_FPU. Signed-off-by: Vincent Chen Acked-by: Greentime Hu Signed-off-by: Greentime Hu

nds32: Only print one page of stack when die to prevent printing too much information.

2018-09-04T06:45:19Z

It may print too much information sometimes if the stack is wrong or too big. This patch can limit the debug information in a page of stack. Signed-off-by: Greentime Hu

nds32: Add macro definition for offset of lp register on stack

2018-09-04T06:45:19Z

Use macro to replace the magic number. Signed-off-by: Zong Li Acked-by: Greentime Hu Signed-off-by: Greentime Hu

nds32: Remove the deprecated ABI implementation

2018-09-04T06:45:19Z

We are not using NDS32 ABI 2 for now, just remove the preprocessor directives __NDS32_ABI_2. Signed-off-by: Zong Li Acked-by: Greentime Hu Signed-off-by: Greentime Hu

nds32/stack: Get real return address by using ftrace_graph_ret_addr

2018-09-04T06:45:18Z

Function graph tracer has modified the return address to 'return_to_handler' on stack, and provide the 'ftrace_graph_ret_addr' to get the real return address. Signed-off-by: Zong Li Acked-by: Greentime Hu Signed-off-by: Greentime Hu