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Diffstat (limited to 'arch/sh/kernel/ptrace_32.c')
-rw-r--r--arch/sh/kernel/ptrace_32.c108
1 files changed, 30 insertions, 78 deletions
diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c
index 668c81631c08..06f765d71a29 100644
--- a/arch/sh/kernel/ptrace_32.c
+++ b/arch/sh/kernel/ptrace_32.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* SuperH process tracing
*
@@ -5,13 +6,10 @@
* Copyright (C) 2002 - 2009 Paul Mundt
*
* Audit support by Yuichi Nakamura <ynakam@hitachisoft.jp>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
*/
#include <linux/kernel.h>
#include <linux/sched.h>
+#include <linux/sched/task_stack.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/errno.h>
@@ -22,12 +20,10 @@
#include <linux/io.h>
#include <linux/audit.h>
#include <linux/seccomp.h>
-#include <linux/tracehook.h>
#include <linux/elf.h>
#include <linux/regset.h>
#include <linux/hw_breakpoint.h>
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
+#include <linux/uaccess.h>
#include <asm/processor.h>
#include <asm/mmu_context.h>
#include <asm/syscalls.h>
@@ -137,26 +133,11 @@ void ptrace_disable(struct task_struct *child)
static int genregs_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
const struct pt_regs *regs = task_pt_regs(target);
- int ret;
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- regs->regs,
- 0, 16 * sizeof(unsigned long));
- if (!ret)
- /* PC, PR, SR, GBR, MACH, MACL, TRA */
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &regs->pc,
- offsetof(struct pt_regs, pc),
- sizeof(struct pt_regs));
- if (!ret)
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- sizeof(struct pt_regs), -1);
-
- return ret;
+ return membuf_write(&to, regs, sizeof(struct pt_regs));
}
static int genregs_set(struct task_struct *target,
@@ -176,17 +157,16 @@ static int genregs_set(struct task_struct *target,
offsetof(struct pt_regs, pc),
sizeof(struct pt_regs));
if (!ret)
- ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
- sizeof(struct pt_regs), -1);
+ user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+ sizeof(struct pt_regs), -1);
return ret;
}
#ifdef CONFIG_SH_FPU
-int fpregs_get(struct task_struct *target,
+static int fpregs_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
int ret;
@@ -194,12 +174,8 @@ int fpregs_get(struct task_struct *target,
if (ret)
return ret;
- if ((boot_cpu_data.flags & CPU_HAS_FPU))
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.xstate->hardfpu, 0, -1);
-
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.xstate->softfpu, 0, -1);
+ return membuf_write(&to, target->thread.xstate,
+ sizeof(struct user_fpu_struct));
}
static int fpregs_set(struct task_struct *target,
@@ -233,20 +209,12 @@ static int fpregs_active(struct task_struct *target,
#ifdef CONFIG_SH_DSP
static int dspregs_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
const struct pt_dspregs *regs =
(struct pt_dspregs *)&target->thread.dsp_status.dsp_regs;
- int ret;
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, regs,
- 0, sizeof(struct pt_dspregs));
- if (!ret)
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- sizeof(struct pt_dspregs), -1);
- return ret;
+ return membuf_write(&to, regs, sizeof(struct pt_dspregs));
}
static int dspregs_set(struct task_struct *target,
@@ -261,8 +229,8 @@ static int dspregs_set(struct task_struct *target,
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, regs,
0, sizeof(struct pt_dspregs));
if (!ret)
- ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
- sizeof(struct pt_dspregs), -1);
+ user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+ sizeof(struct pt_dspregs), -1);
return ret;
}
@@ -323,21 +291,21 @@ static const struct user_regset sh_regsets[] = {
* PC, PR, SR, GBR, MACH, MACL, TRA
*/
[REGSET_GENERAL] = {
- .core_note_type = NT_PRSTATUS,
+ USER_REGSET_NOTE_TYPE(PRSTATUS),
.n = ELF_NGREG,
.size = sizeof(long),
.align = sizeof(long),
- .get = genregs_get,
+ .regset_get = genregs_get,
.set = genregs_set,
},
#ifdef CONFIG_SH_FPU
[REGSET_FPU] = {
- .core_note_type = NT_PRFPREG,
+ USER_REGSET_NOTE_TYPE(PRFPREG),
.n = sizeof(struct user_fpu_struct) / sizeof(long),
.size = sizeof(long),
.align = sizeof(long),
- .get = fpregs_get,
+ .regset_get = fpregs_get,
.set = fpregs_set,
.active = fpregs_active,
},
@@ -348,7 +316,7 @@ static const struct user_regset sh_regsets[] = {
.n = sizeof(struct pt_dspregs) / sizeof(long),
.size = sizeof(long),
.align = sizeof(long),
- .get = dspregs_get,
+ .regset_get = dspregs_get,
.set = dspregs_set,
.active = dspregs_active,
},
@@ -484,40 +452,24 @@ long arch_ptrace(struct task_struct *child, long request,
return ret;
}
-static inline int audit_arch(void)
-{
- int arch = EM_SH;
-
-#ifdef CONFIG_CPU_LITTLE_ENDIAN
- arch |= __AUDIT_ARCH_LE;
-#endif
-
- return arch;
-}
-
asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
{
- long ret = 0;
-
- secure_computing_strict(regs->regs[0]);
-
if (test_thread_flag(TIF_SYSCALL_TRACE) &&
- tracehook_report_syscall_entry(regs))
- /*
- * Tracing decided this syscall should not happen.
- * We'll return a bogus call number to get an ENOSYS
- * error, but leave the original number in regs->regs[0].
- */
- ret = -1L;
+ ptrace_report_syscall_entry(regs)) {
+ regs->regs[0] = -ENOSYS;
+ return -1;
+ }
+
+ if (secure_computing() == -1)
+ return -1;
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_enter(regs, regs->regs[0]);
- audit_syscall_entry(audit_arch(), regs->regs[3],
- regs->regs[4], regs->regs[5],
+ audit_syscall_entry(regs->regs[3], regs->regs[4], regs->regs[5],
regs->regs[6], regs->regs[7]);
- return ret ?: regs->regs[0];
+ return 0;
}
asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
@@ -531,5 +483,5 @@ asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
step = test_thread_flag(TIF_SINGLESTEP);
if (step || test_thread_flag(TIF_SYSCALL_TRACE))
- tracehook_report_syscall_exit(regs, step);
+ ptrace_report_syscall_exit(regs, step);
}
generated by cgit (git 2.34.1) at 2025-12-25 17:17:14 +0000