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/arm/kernel/ptrace.c | 75 +++++++++----------------------------
1 files changed, 18 insertions(+), 57 deletions(-)
diff --git a/kernel/arch/arm/kernel/ptrace.c b/kernel/arch/arm/kernel/ptrace.c
index 492ac74..2771e68 100644
--- a/kernel/arch/arm/kernel/ptrace.c
+++ b/kernel/arch/arm/kernel/ptrace.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/arch/arm/kernel/ptrace.c
*
* By Ross Biro 1/23/92
* edited by Linus Torvalds
* ARM modifications Copyright (C) 2000 Russell King
- *
- * 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.
*/
#include <linux/kernel.h>
#include <linux/sched/signal.h>
@@ -28,7 +25,6 @@
#include <linux/tracehook.h>
#include <linux/unistd.h>
-#include <asm/pgtable.h>
#include <asm/traps.h>
#define CREATE_TRACE_POINTS
@@ -201,22 +197,15 @@
/*
* Handle hitting a breakpoint.
*/
-void ptrace_break(struct task_struct *tsk, struct pt_regs *regs)
+void ptrace_break(struct pt_regs *regs)
{
- siginfo_t info;
-
- clear_siginfo(&info);
- info.si_signo = SIGTRAP;
- info.si_errno = 0;
- info.si_code = TRAP_BRKPT;
- info.si_addr = (void __user *)instruction_pointer(regs);
-
- force_sig_info(SIGTRAP, &info, tsk);
+ force_sig_fault(SIGTRAP, TRAP_BRKPT,
+ (void __user *)instruction_pointer(regs));
}
static int break_trap(struct pt_regs *regs, unsigned int instr)
{
- ptrace_break(current, regs);
+ ptrace_break(regs);
return 0;
}
@@ -580,14 +569,9 @@
static int gpr_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- struct pt_regs *regs = task_pt_regs(target);
-
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- regs,
- 0, sizeof(*regs));
+ return membuf_write(&to, task_pt_regs(target), sizeof(struct pt_regs));
}
static int gpr_set(struct task_struct *target,
@@ -613,12 +597,10 @@
static int fpa_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &task_thread_info(target)->fpstate,
- 0, sizeof(struct user_fp));
+ return membuf_write(&to, &task_thread_info(target)->fpstate,
+ sizeof(struct user_fp));
}
static int fpa_set(struct task_struct *target,
@@ -653,41 +635,20 @@
* vfp_set() ignores this chunk
*
* 1 word for the FPSCR
- *
- * The bounds-checking logic built into user_regset_copyout and friends
- * means that we can make a simple sequence of calls to map the relevant data
- * to/from the specified slice of the user regset structure.
*/
static int vfp_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;
struct thread_info *thread = task_thread_info(target);
struct vfp_hard_struct const *vfp = &thread->vfpstate.hard;
- const size_t user_fpregs_offset = offsetof(struct user_vfp, fpregs);
const size_t user_fpscr_offset = offsetof(struct user_vfp, fpscr);
vfp_sync_hwstate(thread);
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &vfp->fpregs,
- user_fpregs_offset,
- user_fpregs_offset + sizeof(vfp->fpregs));
- if (ret)
- return ret;
-
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- user_fpregs_offset + sizeof(vfp->fpregs),
- user_fpscr_offset);
- if (ret)
- return ret;
-
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &vfp->fpscr,
- user_fpscr_offset,
- user_fpscr_offset + sizeof(vfp->fpscr));
+ membuf_write(&to, vfp->fpregs, sizeof(vfp->fpregs));
+ membuf_zero(&to, user_fpscr_offset - sizeof(vfp->fpregs));
+ return membuf_store(&to, vfp->fpscr);
}
/*
@@ -750,7 +711,7 @@
.n = ELF_NGREG,
.size = sizeof(u32),
.align = sizeof(u32),
- .get = gpr_get,
+ .regset_get = gpr_get,
.set = gpr_set
},
[REGSET_FPR] = {
@@ -762,7 +723,7 @@
.n = sizeof(struct user_fp) / sizeof(u32),
.size = sizeof(u32),
.align = sizeof(u32),
- .get = fpa_get,
+ .regset_get = fpa_get,
.set = fpa_set
},
#ifdef CONFIG_VFP
@@ -775,7 +736,7 @@
.n = ARM_VFPREGS_SIZE / sizeof(u32),
.size = sizeof(u32),
.align = sizeof(u32),
- .get = vfp_get,
+ .regset_get = vfp_get,
.set = vfp_set
},
#endif /* CONFIG_VFP */
@@ -933,7 +894,7 @@
/* Do seccomp after ptrace; syscall may have changed. */
#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
- if (secure_computing(NULL) == -1)
+ if (secure_computing() == -1)
return -1;
#else
/* XXX: remove this once OABI gets fixed */
--
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