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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2024-12-29 09:13:38 +00:00
parisc: Move thread_info into task struct
This implements the CONFIG_THREAD_INFO_IN_TASK option. With this change: - before thread_info was part of the stack and located at the beginning of the stack - now the thread_info struct is moved and located inside the task_struct structure - the stack is allocated and handled like the major other platforms - drop the cpu field of thread_info and use instead the one in task_struct Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Sven Schnelle <svens@stackframe.org>
This commit is contained in:
Helge Deller
parent
bc294838cc
commit
2214c0e772
@ -20,7 +20,7 @@
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| nds32: | ok |
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| nios2: | TODO |
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| openrisc: | TODO |
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| parisc: | TODO |
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| parisc: | ok |
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| powerpc: | ok |
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| riscv: | ok |
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| s390: | ok |
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@ -56,6 +56,7 @@ config PARISC
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select HAVE_UNSTABLE_SCHED_CLOCK if SMP
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select LEGACY_TIMER_TICK
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select CPU_NO_EFFICIENT_FFS
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select THREAD_INFO_IN_TASK
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select NEED_DMA_MAP_STATE
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select NEED_SG_DMA_LENGTH
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select HAVE_ARCH_KGDB
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19
arch/parisc/include/asm/current.h
Normal file
19
arch/parisc/include/asm/current.h
Normal file
@ -0,0 +1,19 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_PARISC_CURRENT_H
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#define _ASM_PARISC_CURRENT_H
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#include <asm/special_insns.h>
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#ifndef __ASSEMBLY__
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struct task_struct;
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static __always_inline struct task_struct *get_current(void)
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{
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return (struct task_struct *) mfctl(30);
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}
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#define current get_current()
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_PARISC_CURRENT_H */
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@ -102,8 +102,6 @@ DECLARE_PER_CPU(struct cpuinfo_parisc, cpu_data);
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#define CPU_HVERSION ((boot_cpu_data.hversion >> 4) & 0x0FFF)
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#define ARCH_MIN_TASKALIGN FRAME_ALIGN
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struct thread_struct {
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struct pt_regs regs;
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unsigned long task_size;
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@ -34,8 +34,23 @@ extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
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#endif /* !ASSEMBLY */
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#define raw_smp_processor_id() (current_thread_info()->cpu)
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/*
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* This is particularly ugly: it appears we can't actually get the definition
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* of task_struct here, but we need access to the CPU this task is running on.
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* Instead of using task_struct we're using TASK_CPU which is extracted from
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* asm-offsets.h by kbuild to get the current processor ID.
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*
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* This also needs to be safeguarded when building asm-offsets.s because at
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* that time TASK_CPU is not defined yet. It could have been guarded by
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* TASK_CPU itself, but we want the build to fail if TASK_CPU is missing
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* when building something else than asm-offsets.s
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*/
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#ifdef GENERATING_ASM_OFFSETS
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#define raw_smp_processor_id() (0)
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#else
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#include <asm/asm-offsets.h>
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#define raw_smp_processor_id() (*(unsigned int *)((void *)current + TASK_CPU))
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#endif
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#else /* CONFIG_SMP */
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static inline void smp_send_all_nop(void) { return; }
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@ -9,23 +9,16 @@
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#include <asm/special_insns.h>
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struct thread_info {
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struct task_struct *task; /* main task structure */
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unsigned long flags; /* thread_info flags (see TIF_*) */
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__u32 cpu; /* current CPU */
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int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */
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};
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.flags = 0, \
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.cpu = 0, \
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.preempt_count = INIT_PREEMPT_COUNT, \
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}
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/* how to get the thread information struct from C */
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#define current_thread_info() ((struct thread_info *)mfctl(30))
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#endif /* !__ASSEMBLY */
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/* thread information allocation */
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@ -14,6 +14,8 @@
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* Copyright (C) 2003 James Bottomley <jejb at parisc-linux.org>
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*/
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#define GENERATING_ASM_OFFSETS /* asm/smp.h */
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/thread_info.h>
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@ -35,13 +37,16 @@
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int main(void)
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{
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DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, stack));
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DEFINE(TASK_FLAGS, offsetof(struct task_struct, flags));
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DEFINE(TASK_TI_FLAGS, offsetof(struct task_struct, thread_info.flags));
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DEFINE(TASK_SIGPENDING, offsetof(struct task_struct, pending));
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DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));
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DEFINE(TASK_MM, offsetof(struct task_struct, mm));
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DEFINE(TASK_PERSONALITY, offsetof(struct task_struct, personality));
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DEFINE(TASK_PID, offsetof(struct task_struct, pid));
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DEFINE(TASK_STACK, offsetof(struct task_struct, stack));
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#ifdef CONFIG_SMP
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DEFINE(TASK_CPU, offsetof(struct task_struct, cpu));
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#endif
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BLANK();
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DEFINE(TASK_REGS, offsetof(struct task_struct, thread.regs));
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DEFINE(TASK_PT_PSW, offsetof(struct task_struct, thread.regs.gr[ 0]));
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@ -129,10 +134,6 @@ int main(void)
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DEFINE(TASK_PT_ISR, offsetof(struct task_struct, thread.regs.isr));
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DEFINE(TASK_PT_IOR, offsetof(struct task_struct, thread.regs.ior));
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BLANK();
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DEFINE(TASK_SZ, sizeof(struct task_struct));
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/* TASK_SZ_ALGN includes space for a stack frame. */
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DEFINE(TASK_SZ_ALGN, align_frame(sizeof(struct task_struct), FRAME_ALIGN));
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BLANK();
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DEFINE(PT_PSW, offsetof(struct pt_regs, gr[ 0]));
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DEFINE(PT_GR1, offsetof(struct pt_regs, gr[ 1]));
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DEFINE(PT_GR2, offsetof(struct pt_regs, gr[ 2]));
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@ -217,17 +218,11 @@ int main(void)
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DEFINE(PT_IIR, offsetof(struct pt_regs, iir));
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DEFINE(PT_ISR, offsetof(struct pt_regs, isr));
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DEFINE(PT_IOR, offsetof(struct pt_regs, ior));
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DEFINE(PT_SIZE, sizeof(struct pt_regs));
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/* PT_SZ_ALGN includes space for a stack frame. */
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DEFINE(PT_SZ_ALGN, align_frame(sizeof(struct pt_regs), FRAME_ALIGN));
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BLANK();
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DEFINE(TI_TASK, offsetof(struct thread_info, task));
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DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
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DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
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DEFINE(TI_PRE_COUNT, offsetof(struct thread_info, preempt_count));
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DEFINE(THREAD_SZ, sizeof(struct thread_info));
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/* THREAD_SZ_ALGN includes space for a stack frame. */
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DEFINE(THREAD_SZ_ALGN, align_frame(sizeof(struct thread_info), FRAME_ALIGN));
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DEFINE(TI_PRE_COUNT, offsetof(struct task_struct, thread_info.preempt_count));
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BLANK();
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DEFINE(ICACHE_BASE, offsetof(struct pdc_cache_info, ic_base));
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DEFINE(ICACHE_STRIDE, offsetof(struct pdc_cache_info, ic_stride));
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@ -63,8 +63,8 @@
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* Need to set up a kernel stack, so call the
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* get_stack_use_cr30 macro to set up a pointer
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* to the pt_regs structure contained within the
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* task pointer pointed to by cr30. Set the stack
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* pointer to point to the end of the task structure.
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* task pointer pointed to by cr30. Load the stack
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* pointer from the task structure.
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*
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* Note that we use shadowed registers for temps until
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* we can save %r26 and %r29. %r26 is used to preserve
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@ -76,8 +76,6 @@
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* or handle_interruption. %r29 is used to hold a pointer
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* the register save area, and once again, it needs to
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* be a non-shadowed register so that it survives the rfir.
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*
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* N.B. TASK_SZ_ALGN and PT_SZ_ALGN include space for a stack frame.
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*/
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.macro get_stack_use_cr30
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@ -86,12 +84,11 @@
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copy %r30, %r17
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mfctl %cr30, %r1
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ldo THREAD_SZ_ALGN(%r1), %r30
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mtsp %r0,%sr7
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tophys %r1,%r9 /* task_struct */
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LDREG TASK_STACK(%r9),%r30
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ldo PT_SZ_ALGN(%r30),%r30
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mtsp %r0,%sr7 /* clear sr7 after kernel stack was set! */
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mtsp %r16,%sr3
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tophys %r1,%r9
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LDREG TI_TASK(%r9), %r1 /* thread_info -> task_struct */
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tophys %r1,%r9
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ldo TASK_REGS(%r9),%r9
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STREG %r17,PT_GR30(%r9)
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STREG %r29,PT_GR29(%r9)
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@ -733,7 +730,7 @@ ENTRY(ret_from_kernel_thread)
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BL schedule_tail, %r2
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nop
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LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
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mfctl %cr30,%r1 /* task_struct */
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LDREG TASK_PT_GR25(%r1), %r26
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#ifdef CONFIG_64BIT
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LDREG TASK_PT_GR27(%r1), %r27
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@ -764,7 +761,6 @@ ENTRY_CFI(_switch_to)
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STREG %r30, TASK_PT_KSP(%r26)
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LDREG TASK_PT_KSP(%r25), %r30
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LDREG TASK_THREAD_INFO(%r25), %r25
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bv %r0(%r2)
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mtctl %r25,%cr30
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@ -795,8 +791,7 @@ ENDPROC_CFI(_switch_to)
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.align PAGE_SIZE
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ENTRY_CFI(syscall_exit_rfi)
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mfctl %cr30,%r16
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LDREG TI_TASK(%r16), %r16 /* thread_info -> task_struct */
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mfctl %cr30,%r16 /* task_struct */
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ldo TASK_REGS(%r16),%r16
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/* Force iaoq to userspace, as the user has had access to our current
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* context via sigcontext. Also Filter the PSW for the same reason.
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@ -841,14 +836,14 @@ ENTRY_CFI(syscall_exit_rfi)
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ENTRY(intr_return)
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/* check for reschedule */
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mfctl %cr30,%r1
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LDREG TI_FLAGS(%r1),%r19 /* sched.h: TIF_NEED_RESCHED */
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LDREG TASK_TI_FLAGS(%r1),%r19 /* sched.h: TIF_NEED_RESCHED */
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bb,<,n %r19,31-TIF_NEED_RESCHED,intr_do_resched /* forward */
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.import do_notify_resume,code
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intr_check_sig:
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/* As above */
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mfctl %cr30,%r1
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LDREG TI_FLAGS(%r1),%r19
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LDREG TASK_TI_FLAGS(%r1),%r19
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ldi (_TIF_USER_WORK_MASK & ~_TIF_NEED_RESCHED), %r20
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and,COND(<>) %r19, %r20, %r0
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b,n intr_restore /* skip past if we've nothing to do */
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@ -1692,7 +1687,7 @@ dtlb_fault:
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.macro fork_like name
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ENTRY_CFI(sys_\name\()_wrapper)
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LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
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mfctl %cr30,%r1
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ldo TASK_REGS(%r1),%r1
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reg_save %r1
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mfctl %cr27, %r28
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@ -1712,7 +1707,7 @@ ENTRY(child_return)
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BL schedule_tail, %r2
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nop
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finish_child_return:
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LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
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mfctl %cr30,%r1
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ldo TASK_REGS(%r1),%r1 /* get pt regs */
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LDREG PT_CR27(%r1), %r3
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@ -1723,7 +1718,7 @@ finish_child_return:
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END(child_return)
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ENTRY_CFI(sys_rt_sigreturn_wrapper)
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LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26
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mfctl %cr30,%r26
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ldo TASK_REGS(%r26),%r26 /* get pt regs */
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/* Don't save regs, we are going to restore them from sigcontext. */
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STREG %r2, -RP_OFFSET(%r30)
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@ -1740,7 +1735,7 @@ ENTRY_CFI(sys_rt_sigreturn_wrapper)
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LDREG -RP_OFFSET(%r30), %r2
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/* FIXME: I think we need to restore a few more things here. */
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LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
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mfctl %cr30,%r1
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ldo TASK_REGS(%r1),%r1 /* get pt regs */
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reg_restore %r1
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@ -1759,9 +1754,7 @@ ENTRY(syscall_exit)
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*/
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/* save return value now */
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mfctl %cr30, %r1
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LDREG TI_TASK(%r1),%r1
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STREG %r28,TASK_PT_GR28(%r1)
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/* Seems to me that dp could be wrong here, if the syscall involved
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@ -1772,13 +1765,14 @@ ENTRY(syscall_exit)
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syscall_check_resched:
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/* check for reschedule */
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LDREG TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19 /* long */
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mfctl %cr30,%r19
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LDREG TASK_TI_FLAGS(%r19),%r19 /* long */
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bb,<,n %r19, 31-TIF_NEED_RESCHED, syscall_do_resched /* forward */
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.import do_signal,code
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syscall_check_sig:
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LDREG TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19
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mfctl %cr30,%r19
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LDREG TASK_TI_FLAGS(%r19),%r19
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ldi (_TIF_USER_WORK_MASK & ~_TIF_NEED_RESCHED), %r26
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and,COND(<>) %r19, %r26, %r0
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b,n syscall_restore /* skip past if we've nothing to do */
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@ -1789,7 +1783,7 @@ syscall_do_signal:
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* consistent with all the relevant state of the process
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* before the syscall. We need to verify this.
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*/
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LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
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mfctl %cr30,%r1
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ldo TASK_REGS(%r1), %r26 /* struct pt_regs *regs */
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reg_save %r26
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@ -1800,17 +1794,17 @@ syscall_do_signal:
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BL do_notify_resume,%r2
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ldi 1, %r25 /* long in_syscall = 1 */
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LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
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mfctl %cr30,%r1
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ldo TASK_REGS(%r1), %r20 /* reload pt_regs */
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reg_restore %r20
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b,n syscall_check_sig
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syscall_restore:
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LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
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mfctl %cr30,%r1
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/* Are we being ptraced? */
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LDREG TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19
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LDREG TASK_TI_FLAGS(%r1),%r19
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ldi _TIF_SYSCALL_TRACE_MASK,%r2
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and,COND(=) %r19,%r2,%r0
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b,n syscall_restore_rfi
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@ -35,7 +35,8 @@ END(boot_args)
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__HEAD
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.align 4
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.import init_thread_union,data
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.import init_task,data
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.import init_stack,data
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.import fault_vector_20,code /* IVA parisc 2.0 32 bit */
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#ifndef CONFIG_64BIT
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.import fault_vector_11,code /* IVA parisc 1.1 32 bit */
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@ -123,12 +124,12 @@ $pgt_fill_loop:
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load32 start_parisc,%r11
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/* And the initial task pointer */
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load32 init_thread_union,%r6
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load32 init_task,%r6
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mtctl %r6,%cr30
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/* And the stack pointer too */
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ldo THREAD_SZ_ALGN(%r6),%sp
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load32 init_stack,%sp
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tophys_r1 %sp
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#if defined(CONFIG_64BIT) && defined(CONFIG_FUNCTION_TRACER)
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.import _mcount,data
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/* initialize mcount FPTR */
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@ -186,12 +187,11 @@ common_stext:
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#endif /*CONFIG_SMP*/
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#ifdef CONFIG_64BIT
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tophys_r1 %sp
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mfctl %cr30,%r6 /* PCX-W2 firmware bug */
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tophys_r1 %r6
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/* Save the rfi target address */
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ldd TI_TASK-THREAD_SZ_ALGN(%sp), %r10
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tophys_r1 %r10
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std %r11, TASK_PT_GR11(%r10)
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STREG %r11, TASK_PT_GR11(%r6)
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/* Switch to wide mode Superdome doesn't support narrow PDC
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** calls.
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*/
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@ -206,7 +206,6 @@ common_stext:
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** Someday, palo might not do this for the Monarch either.
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*/
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2:
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mfctl %cr30,%r6 /* PCX-W2 firmware bug */
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ldo PDC_PSW(%r0),%arg0 /* 21 */
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ldo PDC_PSW_SET_DEFAULTS(%r0),%arg1 /* 2 */
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@ -216,13 +215,9 @@ common_stext:
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copy %r0,%arg3
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stext_pdc_ret:
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LDREG TASK_PT_GR11(%r6), %r11
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tovirt_r1 %r6
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mtctl %r6,%cr30 /* restore task thread info */
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/* restore rfi target address*/
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ldd TI_TASK-THREAD_SZ_ALGN(%sp), %r10
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tophys_r1 %r10
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ldd TASK_PT_GR11(%r10), %r11
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tovirt_r1 %sp
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#endif
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/* PARANOID: clear user scratch/user space SR's */
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@ -287,7 +282,9 @@ aligned_rfi:
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load32 KERNEL_PSW,%r10
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mtctl %r10,%ipsw
|
||||
|
||||
|
||||
tovirt_r1 %sp
|
||||
|
||||
/* Jump through hyperspace to Virt Mode */
|
||||
rfi
|
||||
nop
|
||||
@ -343,12 +340,13 @@ smp_slave_stext:
|
||||
#endif
|
||||
|
||||
/* Initialize the SP - monarch sets up smp_init_current_idle_task */
|
||||
load32 PA(smp_init_current_idle_task),%sp
|
||||
LDREG 0(%sp),%sp /* load task address */
|
||||
load32 PA(smp_init_current_idle_task),%r6
|
||||
LDREG 0(%r6),%r6
|
||||
mtctl %r6,%cr30
|
||||
tophys_r1 %r6
|
||||
LDREG TASK_STACK(%r6),%sp
|
||||
tophys_r1 %sp
|
||||
LDREG TASK_THREAD_INFO(%sp),%sp
|
||||
mtctl %sp,%cr30 /* store in cr30 */
|
||||
ldo THREAD_SZ_ALGN(%sp),%sp
|
||||
ldo FRAME_SIZE(%sp),%sp
|
||||
|
||||
/* point CPU to kernel page tables */
|
||||
load32 PA(swapper_pg_dir),%r4
|
||||
|
||||
@ -15,6 +15,7 @@
|
||||
#include <linux/kernel_stat.h>
|
||||
#include <linux/seq_file.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/sched/task_stack.h>
|
||||
#include <asm/io.h>
|
||||
|
||||
#include <asm/softirq_stack.h>
|
||||
@ -399,8 +400,7 @@ static inline void stack_overflow_check(struct pt_regs *regs)
|
||||
#ifdef CONFIG_DEBUG_STACKOVERFLOW
|
||||
#define STACK_MARGIN (256*6)
|
||||
|
||||
/* Our stack starts directly behind the thread_info struct. */
|
||||
unsigned long stack_start = (unsigned long) current_thread_info();
|
||||
unsigned long stack_start = (unsigned long) task_stack_page(current);
|
||||
unsigned long sp = regs->gr[30];
|
||||
unsigned long stack_usage;
|
||||
unsigned int *last_usage;
|
||||
@ -476,7 +476,7 @@ static void execute_on_irq_stack(void *func, unsigned long param1)
|
||||
union_ptr = &per_cpu(irq_stack_union, smp_processor_id());
|
||||
irq_stack = (unsigned long) &union_ptr->stack;
|
||||
irq_stack = ALIGN(irq_stack + sizeof(irq_stack_union.slock),
|
||||
64); /* align for stack frame usage */
|
||||
FRAME_ALIGN); /* align for stack frame usage */
|
||||
|
||||
/* We may be called recursive. If we are already using the irq stack,
|
||||
* just continue to use it. Use spinlocks to serialize
|
||||
|
||||
@ -205,7 +205,7 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
|
||||
/* Must exit via ret_from_kernel_thread in order
|
||||
* to call schedule_tail()
|
||||
*/
|
||||
cregs->ksp = (unsigned long)stack + THREAD_SZ_ALGN + FRAME_SIZE;
|
||||
cregs->ksp = (unsigned long) stack + FRAME_SIZE + PT_SZ_ALGN;
|
||||
cregs->kpc = (unsigned long) &ret_from_kernel_thread;
|
||||
/*
|
||||
* Copy function and argument to be called from
|
||||
@ -228,7 +228,7 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
|
||||
if (likely(usp))
|
||||
cregs->gr[30] = usp;
|
||||
}
|
||||
cregs->ksp = (unsigned long)stack + THREAD_SZ_ALGN + FRAME_SIZE;
|
||||
cregs->ksp = (unsigned long) stack + FRAME_SIZE;
|
||||
cregs->kpc = (unsigned long) &child_return;
|
||||
|
||||
/* Setup thread TLS area */
|
||||
|
||||
@ -324,7 +324,7 @@ int smp_boot_one_cpu(int cpuid, struct task_struct *idle)
|
||||
const struct cpuinfo_parisc *p = &per_cpu(cpu_data, cpuid);
|
||||
long timeout;
|
||||
|
||||
task_thread_info(idle)->cpu = cpuid;
|
||||
idle->cpu = cpuid;
|
||||
|
||||
/* Let _start know what logical CPU we're booting
|
||||
** (offset into init_tasks[],cpu_data[])
|
||||
|
||||
@ -139,9 +139,9 @@ linux_gateway_entry:
|
||||
xor %r1,%r30,%r30 /* ye olde xor trick */
|
||||
xor %r1,%r30,%r1
|
||||
xor %r1,%r30,%r30
|
||||
|
||||
ldo THREAD_SZ_ALGN+FRAME_SIZE(%r30),%r30 /* set up kernel stack */
|
||||
|
||||
LDREG TASK_STACK(%r30),%r30 /* set up kernel stack */
|
||||
ldo FRAME_SIZE(%r30),%r30
|
||||
/* N.B.: It is critical that we don't set sr7 to 0 until r30
|
||||
* contains a valid kernel stack pointer. It is also
|
||||
* critical that we don't start using the kernel stack
|
||||
@ -152,7 +152,6 @@ linux_gateway_entry:
|
||||
ssm PSW_SM_I, %r0 /* enable interrupts */
|
||||
STREGM %r1,FRAME_SIZE(%r30) /* save r1 (usp) here for now */
|
||||
mfctl %cr30,%r1 /* get task ptr in %r1 */
|
||||
LDREG TI_TASK(%r1),%r1
|
||||
|
||||
/* Save some registers for sigcontext and potential task
|
||||
switch (see entry.S for the details of which ones are
|
||||
@ -207,7 +206,7 @@ linux_gateway_entry:
|
||||
|
||||
/* Are we being ptraced? */
|
||||
mfctl %cr30, %r1
|
||||
LDREG TI_FLAGS(%r1),%r1
|
||||
LDREG TASK_TI_FLAGS(%r1),%r1
|
||||
ldi _TIF_SYSCALL_TRACE_MASK, %r19
|
||||
and,COND(=) %r1, %r19, %r0
|
||||
b,n .Ltracesys
|
||||
@ -272,8 +271,7 @@ tracesys:
|
||||
* C bit set, a non-straced syscall entry results in C and D clear
|
||||
* in the saved PSW.
|
||||
*/
|
||||
ldo -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 /* get task ptr */
|
||||
LDREG TI_TASK(%r1), %r1
|
||||
mfctl %cr30,%r1 /* get task ptr */
|
||||
ssm 0,%r2
|
||||
STREG %r2,TASK_PT_PSW(%r1) /* Lower 8 bits only!! */
|
||||
mfsp %sr0,%r2
|
||||
@ -327,8 +325,7 @@ tracesys_next:
|
||||
*/
|
||||
copy %ret0,%r20
|
||||
|
||||
ldo -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 /* get task ptr */
|
||||
LDREG TI_TASK(%r1), %r1
|
||||
mfctl %cr30,%r1 /* get task ptr */
|
||||
LDREG TASK_PT_GR28(%r1), %r28 /* Restore return value */
|
||||
LDREG TASK_PT_GR26(%r1), %r26 /* Restore the users args */
|
||||
LDREG TASK_PT_GR25(%r1), %r25
|
||||
@ -385,16 +382,14 @@ tracesys_next:
|
||||
makes a direct call to syscall_trace. */
|
||||
|
||||
tracesys_exit:
|
||||
ldo -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 /* get task ptr */
|
||||
LDREG TI_TASK(%r1), %r1
|
||||
mfctl %cr30,%r1 /* get task ptr */
|
||||
#ifdef CONFIG_64BIT
|
||||
ldo -16(%r30),%r29 /* Reference param save area */
|
||||
#endif
|
||||
ldo TASK_REGS(%r1),%r26
|
||||
BL do_syscall_trace_exit,%r2
|
||||
STREG %r28,TASK_PT_GR28(%r1) /* save return value now */
|
||||
ldo -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 /* get task ptr */
|
||||
LDREG TI_TASK(%r1), %r1
|
||||
mfctl %cr30,%r1 /* get task ptr */
|
||||
LDREG TASK_PT_GR28(%r1), %r28 /* Restore return val. */
|
||||
|
||||
ldil L%syscall_exit,%r1
|
||||
@ -407,8 +402,7 @@ tracesys_exit:
|
||||
ldo R%tracesys_sigexit(%r2),%r2
|
||||
|
||||
tracesys_sigexit:
|
||||
ldo -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 /* get task ptr */
|
||||
LDREG TI_TASK(%r1), %r1
|
||||
mfctl %cr30,%r1 /* get task ptr */
|
||||
#ifdef CONFIG_64BIT
|
||||
ldo -16(%r30),%r29 /* Reference param save area */
|
||||
#endif
|
||||
|
||||
@ -144,7 +144,7 @@ void show_regs(struct pt_regs *regs)
|
||||
printk("%s IIR: %08lx ISR: " RFMT " IOR: " RFMT "\n",
|
||||
level, regs->iir, regs->isr, regs->ior);
|
||||
printk("%s CPU: %8d CR30: " RFMT " CR31: " RFMT "\n",
|
||||
level, current_thread_info()->cpu, cr30, cr31);
|
||||
level, task_cpu(current), cr30, cr31);
|
||||
printk("%s ORIG_R28: " RFMT "\n", level, regs->orig_r28);
|
||||
|
||||
if (user) {
|
||||
|
||||
@ -14,6 +14,7 @@
|
||||
#include <linux/sched.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/sort.h>
|
||||
#include <linux/sched/task_stack.h>
|
||||
|
||||
#include <linux/uaccess.h>
|
||||
#include <asm/assembly.h>
|
||||
@ -299,12 +300,9 @@ static void unwind_frame_regs(struct unwind_frame_info *info)
|
||||
info->prev_sp = sp - 64;
|
||||
info->prev_ip = 0;
|
||||
|
||||
/* The stack is at the end inside the thread_union
|
||||
* struct. If we reach data, we have reached the
|
||||
* beginning of the stack and should stop unwinding. */
|
||||
if (info->prev_sp >= (unsigned long) task_thread_info(info->t) &&
|
||||
info->prev_sp < ((unsigned long) task_thread_info(info->t)
|
||||
+ THREAD_SZ_ALGN)) {
|
||||
/* Check if stack is inside kernel stack area */
|
||||
if ((info->prev_sp - (unsigned long) task_stack_page(info->t))
|
||||
>= THREAD_SIZE) {
|
||||
info->prev_sp = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user