From 01573e231f18eb2d99162747186f59511f56b64d Mon Sep 17 00:00:00 2001 From: hc <hc@nodka.com> Date: Fri, 08 Dec 2023 10:40:48 +0000 Subject: [PATCH] 移去rt --- kernel/arch/arc/kernel/entry.S | 47 ++++++++++++++++++++++++++--------------------- 1 files changed, 26 insertions(+), 21 deletions(-) diff --git a/kernel/arch/arc/kernel/entry.S b/kernel/arch/arc/kernel/entry.S index 37ad245..6ee9cb5 100644 --- a/kernel/arch/arc/kernel/entry.S +++ b/kernel/arch/arc/kernel/entry.S @@ -1,13 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Common Low Level Interrupts/Traps/Exceptions(non-TLB) Handling for ARC * (included from entry-<isa>.S * * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com) * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ /*------------------------------------------------------------------ @@ -37,6 +34,18 @@ b .Lret_from_system_call END(sys_clone_wrapper) + +ENTRY(sys_clone3_wrapper) + SAVE_CALLEE_SAVED_USER + bl @sys_clone3 + DISCARD_CALLEE_SAVED_USER + + GET_CURR_THR_INFO_FLAGS r10 + btst r10, TIF_SYSCALL_TRACE + bnz tracesys_exit + + b .Lret_from_system_call +END(sys_clone3_wrapper) ENTRY(ret_from_fork) ; when the forked child comes here from the __switch_to function @@ -156,7 +165,6 @@ tracesys: ; save EFA in case tracer wants the PC of traced task ; using ERET won't work since next-PC has already committed - lr r12, [efa] GET_CURR_TASK_FIELD_PTR TASK_THREAD, r11 st r12, [r11, THREAD_FAULT_ADDR] ; thread.fault_address @@ -191,6 +199,7 @@ st r0, [sp, PT_r0] ; sys call return value in pt_regs ;POST Sys Call Ptrace Hook + mov r0, sp ; pt_regs needed bl @syscall_trace_exit b ret_from_exception ; NOT ret_from_system_call at is saves r0 which ; we'd done before calling post hook above @@ -199,14 +208,8 @@ ; Breakpoint TRAP ; --------------------------------------------- trap_with_param: - - ; stop_pc info by gdb needs this info - lr r0, [efa] + mov r0, r12 ; EFA in case ptracer/gdb wants stop_pc mov r1, sp - - ; Now that we have read EFA, it is safe to do "fake" rtie - ; and get out of CPU exception mode - FAKE_RET_FROM_EXCPN ; Save callee regs in case gdb wants to have a look ; SP will grow up by size of CALLEE Reg-File @@ -234,15 +237,16 @@ EXCEPTION_PROLOGUE + lr r12, [efa] + + FAKE_RET_FROM_EXCPN + ;============ TRAP 1 :breakpoints - ; Check ECR for trap with arg (PROLOGUE ensures r9 has ECR) - bmsk.f 0, r9, 7 + ; Check ECR for trap with arg (PROLOGUE ensures r10 has ECR) + bmsk.f 0, r10, 7 bnz trap_with_param ;============ TRAP (no param): syscall top level - - ; First return from Exception to pure K mode (Exception/IRQs renabled) - FAKE_RET_FROM_EXCPN ; If syscall tracing ongoing, invoke pre-post-hooks GET_CURR_THR_INFO_FLAGS r10 @@ -304,7 +308,8 @@ mov r0, sp ; pt_regs for arg to do_signal()/do_notify_resume() GET_CURR_THR_INFO_FLAGS r9 - bbit0 r9, TIF_SIGPENDING, .Lchk_notify_resume + and.f 0, r9, _TIF_SIGPENDING|_TIF_NOTIFY_SIGNAL + bz .Lchk_notify_resume ; Normal Trap/IRQ entry only saves Scratch (caller-saved) regs ; in pt_reg since the "C" ABI (kernel code) will automatically @@ -340,11 +345,11 @@ resume_kernel_mode: ; Disable Interrupts from this point on - ; CONFIG_PREEMPT: This is a must for preempt_schedule_irq() - ; !CONFIG_PREEMPT: To ensure restore_regs is intr safe + ; CONFIG_PREEMPTION: This is a must for preempt_schedule_irq() + ; !CONFIG_PREEMPTION: To ensure restore_regs is intr safe IRQ_DISABLE r9 -#ifdef CONFIG_PREEMPT +#ifdef CONFIG_PREEMPTION ; Can't preempt if preemption disabled GET_CURR_THR_INFO_FROM_SP r10 -- Gitblit v1.6.2