From f0bddf50586da81360627a772be0e355b62f071e Mon Sep 17 00:00:00 2001 From: Guo Ren Date: Tue, 21 Feb 2023 22:30:18 -0500 Subject: riscv: entry: Convert to generic entry MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch converts riscv to use the generic entry infrastructure from kernel/entry/*. The generic entry makes maintainers' work easier and codes more elegant. Here are the changes: - More clear entry.S with handle_exception and ret_from_exception - Get rid of complex custom signal implementation - Move syscall procedure from assembly to C, which is much more readable. - Connect ret_from_fork & ret_from_kernel_thread to generic entry. - Wrap with irqentry_enter/exit and syscall_enter/exit_from_user_mode - Use the standard preemption code instead of custom Suggested-by: Huacai Chen Reviewed-by: Björn Töpel Tested-by: Yipeng Zou Tested-by: Jisheng Zhang Signed-off-by: Guo Ren Signed-off-by: Guo Ren Cc: Ben Hutchings Link: https://lore.kernel.org/r/20230222033021.983168-5-guoren@kernel.org Signed-off-by: Palmer Dabbelt --- arch/riscv/include/asm/stacktrace.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/riscv/include/asm/stacktrace.h') diff --git a/arch/riscv/include/asm/stacktrace.h b/arch/riscv/include/asm/stacktrace.h index 3450c1912afd..f7e8ef2418b9 100644 --- a/arch/riscv/include/asm/stacktrace.h +++ b/arch/riscv/include/asm/stacktrace.h @@ -16,4 +16,9 @@ extern void notrace walk_stackframe(struct task_struct *task, struct pt_regs *re extern void dump_backtrace(struct pt_regs *regs, struct task_struct *task, const char *loglvl); +static inline bool on_thread_stack(void) +{ + return !(((unsigned long)(current->stack) ^ current_stack_pointer) & ~(THREAD_SIZE - 1)); +} + #endif /* _ASM_RISCV_STACKTRACE_H */ -- cgit v1.2.3