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-rw-r--r--arch/sh/kernel/entry-common.S2
-rw-r--r--arch/sh/kernel/io_generic.c3
-rw-r--r--arch/sh/kernel/process.c5
-rw-r--r--arch/sh/kernel/ptrace.c45
-rw-r--r--arch/sh/kernel/signal.c4
-rw-r--r--arch/sh/kernel/vmlinux.lds.S3
6 files changed, 41 insertions, 21 deletions
diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index ab4ebb856c2..b4672802719 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -224,7 +224,7 @@ work_resched:
syscall_exit_work:
! r0: current_thread_info->flags
! r8: current_thread_info
- tst #_TIF_SYSCALL_TRACE, r0
+ tst #_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP, r0
bt/s work_pending
tst #_TIF_NEED_RESCHED, r0
#ifdef CONFIG_TRACE_IRQFLAGS
diff --git a/arch/sh/kernel/io_generic.c b/arch/sh/kernel/io_generic.c
index 66626c03e1e..771ea423044 100644
--- a/arch/sh/kernel/io_generic.c
+++ b/arch/sh/kernel/io_generic.c
@@ -14,7 +14,6 @@
#include <linux/module.h>
#include <linux/io.h>
#include <asm/machvec.h>
-#include <asm/cacheflush.h>
#ifdef CONFIG_CPU_SH3
/* SH3 has a PCMCIA bug that needs a dummy read from area 6 for a
@@ -96,7 +95,6 @@ void generic_insw(unsigned long port, void *dst, unsigned long count)
while (count--)
*buf++ = *port_addr;
- flush_dcache_all();
dummy_read();
}
@@ -171,7 +169,6 @@ void generic_outsw(unsigned long port, const void *src, unsigned long count)
while (count--)
*port_addr = *buf++;
- flush_dcache_all();
dummy_read();
}
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 9d6a438b3ea..e7607366ac4 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -250,12 +250,11 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
childregs->regs[15] = usp;
ti->addr_limit = USER_DS;
} else {
- childregs->regs[15] = (unsigned long)task_stack_page(p) +
- THREAD_SIZE;
+ childregs->regs[15] = (unsigned long)childregs;
ti->addr_limit = KERNEL_DS;
}
- if (clone_flags & CLONE_SETTLS)
+ if (clone_flags & CLONE_SETTLS)
childregs->gbr = childregs->regs[0];
childregs->regs[0] = 0; /* Set return value for child */
diff --git a/arch/sh/kernel/ptrace.c b/arch/sh/kernel/ptrace.c
index 04ca13a041c..855f7246cff 100644
--- a/arch/sh/kernel/ptrace.c
+++ b/arch/sh/kernel/ptrace.c
@@ -8,7 +8,6 @@
* SuperH version: Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
*
*/
-
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
@@ -20,8 +19,7 @@
#include <linux/slab.h>
#include <linux/security.h>
#include <linux/signal.h>
-
-#include <asm/io.h>
+#include <linux/io.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/system.h>
@@ -59,6 +57,23 @@ static inline int put_stack_long(struct task_struct *task, int offset,
return 0;
}
+static void ptrace_disable_singlestep(struct task_struct *child)
+{
+ clear_tsk_thread_flag(child, TIF_SINGLESTEP);
+
+ /*
+ * Ensure the UBC is not programmed at the next context switch.
+ *
+ * Normally this is not needed but there are sequences such as
+ * singlestep, signal delivery, and continue that leave the
+ * ubc_pc non-zero leading to spurious SIGTRAPs.
+ */
+ if (child->thread.ubc_pc != 0) {
+ ubc_usercnt -= 1;
+ child->thread.ubc_pc = 0;
+ }
+}
+
/*
* Called by kernel/ptrace.c when detaching..
*
@@ -66,7 +81,7 @@ static inline int put_stack_long(struct task_struct *task, int offset,
*/
void ptrace_disable(struct task_struct *child)
{
- /* nothing to do.. */
+ ptrace_disable_singlestep(child);
}
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
@@ -76,7 +91,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
switch (request) {
/* when I and D space are separate, these will need to be fixed. */
- case PTRACE_PEEKTEXT: /* read word at location addr. */
+ case PTRACE_PEEKTEXT: /* read word at location addr. */
case PTRACE_PEEKDATA: {
unsigned long tmp;
int copied;
@@ -94,7 +109,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
unsigned long tmp;
ret = -EIO;
- if ((addr & 3) || addr < 0 ||
+ if ((addr & 3) || addr < 0 ||
addr > sizeof(struct user) - 3)
break;
@@ -129,7 +144,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
ret = -EIO;
- if ((addr & 3) || addr < 0 ||
+ if ((addr & 3) || addr < 0 ||
addr > sizeof(struct user) - 3)
break;
@@ -156,6 +171,9 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
else
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+
+ ptrace_disable_singlestep(child);
+
child->exit_code = data;
wake_up_process(child);
ret = 0;
@@ -163,14 +181,15 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
}
/*
- * make the child exit. Best I can do is send it a sigkill.
- * perhaps it should be put in the status that it wants to
+ * make the child exit. Best I can do is send it a sigkill.
+ * perhaps it should be put in the status that it wants to
* exit.
*/
case PTRACE_KILL: {
ret = 0;
if (child->exit_state == EXIT_ZOMBIE) /* already dead */
break;
+ ptrace_disable_singlestep(child);
child->exit_code = SIGKILL;
wake_up_process(child);
break;
@@ -196,6 +215,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
ubc_usercnt += 1;
child->thread.ubc_pc = pc;
+ set_tsk_thread_flag(child, TIF_SINGLESTEP);
child->exit_code = data;
/* give it a chance to run. */
wake_up_process(child);
@@ -248,14 +268,15 @@ asmlinkage void do_syscall_trace(void)
{
struct task_struct *tsk = current;
- if (!test_thread_flag(TIF_SYSCALL_TRACE))
+ if (!test_thread_flag(TIF_SYSCALL_TRACE) &&
+ !test_thread_flag(TIF_SINGLESTEP))
return;
if (!(tsk->ptrace & PT_PTRACED))
return;
/* the 0x80 provides a way for the tracing parent to distinguish
between a syscall stop and SIGTRAP delivery */
- ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
- ? 0x80 : 0));
+ ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) &&
+ !test_thread_flag(TIF_SINGLESTEP) ? 0x80 : 0));
/*
* this isn't the same as continuing with a signal, but it will do
diff --git a/arch/sh/kernel/signal.c b/arch/sh/kernel/signal.c
index 32f10a03fbb..9f39ef1f73d 100644
--- a/arch/sh/kernel/signal.c
+++ b/arch/sh/kernel/signal.c
@@ -589,6 +589,8 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
if (test_thread_flag(TIF_RESTORE_SIGMASK))
clear_thread_flag(TIF_RESTORE_SIGMASK);
}
+
+ return;
}
no_signal:
@@ -598,7 +600,7 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
if (regs->regs[0] == -ERESTARTNOHAND ||
regs->regs[0] == -ERESTARTSYS ||
regs->regs[0] == -ERESTARTNOINTR) {
- regs->regs[0] = save_r0;
+ regs->regs[0] = save_r0;
regs->pc -= 2;
} else if (regs->regs[0] == -ERESTART_RESTARTBLOCK) {
regs->pc -= 2;
diff --git a/arch/sh/kernel/vmlinux.lds.S b/arch/sh/kernel/vmlinux.lds.S
index 75de165867a..78a6c09875b 100644
--- a/arch/sh/kernel/vmlinux.lds.S
+++ b/arch/sh/kernel/vmlinux.lds.S
@@ -3,6 +3,7 @@
* Written by Niibe Yutaka
*/
#include <asm/thread_info.h>
+#include <asm/cache.h>
#include <asm-generic/vmlinux.lds.h>
#ifdef CONFIG_CPU_LITTLE_ENDIAN
@@ -53,7 +54,7 @@ SECTIONS
. = ALIGN(PAGE_SIZE);
.data.page_aligned : { *(.data.page_aligned) }
- . = ALIGN(32);
+ . = ALIGN(L1_CACHE_BYTES);
__per_cpu_start = .;
.data.percpu : { *(.data.percpu) }
__per_cpu_end = .;
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-16 08:32:58 +0000