mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-14 22:44:27 +08:00
e2c0cdfba7
This patch contains code that is in some way visible to the user: including via system calls, the VDSO, module loading and signal handling. It also contains some generic code that is ABI visible. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
/*
|
|
* Copyright 2010 Tilera Corporation. All Rights Reserved.
|
|
* Copyright 2015 Regents of the University of California
|
|
* Copyright 2017 SiFive
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation, version 2.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* Copied from arch/tile/kernel/ptrace.c
|
|
*/
|
|
|
|
#include <asm/ptrace.h>
|
|
#include <asm/syscall.h>
|
|
#include <asm/thread_info.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/elf.h>
|
|
#include <linux/regset.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/sched/task_stack.h>
|
|
#include <linux/tracehook.h>
|
|
#include <trace/events/syscalls.h>
|
|
|
|
enum riscv_regset {
|
|
REGSET_X,
|
|
};
|
|
|
|
static int riscv_gpr_get(struct task_struct *target,
|
|
const struct user_regset *regset,
|
|
unsigned int pos, unsigned int count,
|
|
void *kbuf, void __user *ubuf)
|
|
{
|
|
struct pt_regs *regs;
|
|
|
|
regs = task_pt_regs(target);
|
|
return user_regset_copyout(&pos, &count, &kbuf, &ubuf, regs, 0, -1);
|
|
}
|
|
|
|
static int riscv_gpr_set(struct task_struct *target,
|
|
const struct user_regset *regset,
|
|
unsigned int pos, unsigned int count,
|
|
const void *kbuf, const void __user *ubuf)
|
|
{
|
|
int ret;
|
|
struct pt_regs *regs;
|
|
|
|
regs = task_pt_regs(target);
|
|
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®s, 0, -1);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static const struct user_regset riscv_user_regset[] = {
|
|
[REGSET_X] = {
|
|
.core_note_type = NT_PRSTATUS,
|
|
.n = ELF_NGREG,
|
|
.size = sizeof(elf_greg_t),
|
|
.align = sizeof(elf_greg_t),
|
|
.get = &riscv_gpr_get,
|
|
.set = &riscv_gpr_set,
|
|
},
|
|
};
|
|
|
|
static const struct user_regset_view riscv_user_native_view = {
|
|
.name = "riscv",
|
|
.e_machine = EM_RISCV,
|
|
.regsets = riscv_user_regset,
|
|
.n = ARRAY_SIZE(riscv_user_regset),
|
|
};
|
|
|
|
const struct user_regset_view *task_user_regset_view(struct task_struct *task)
|
|
{
|
|
return &riscv_user_native_view;
|
|
}
|
|
|
|
void ptrace_disable(struct task_struct *child)
|
|
{
|
|
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
|
|
}
|
|
|
|
long arch_ptrace(struct task_struct *child, long request,
|
|
unsigned long addr, unsigned long data)
|
|
{
|
|
long ret = -EIO;
|
|
|
|
switch (request) {
|
|
default:
|
|
ret = ptrace_request(child, request, addr, data);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Allows PTRACE_SYSCALL to work. These are called from entry.S in
|
|
* {handle,ret_from}_syscall.
|
|
*/
|
|
void do_syscall_trace_enter(struct pt_regs *regs)
|
|
{
|
|
if (test_thread_flag(TIF_SYSCALL_TRACE))
|
|
if (tracehook_report_syscall_entry(regs))
|
|
syscall_set_nr(current, regs, -1);
|
|
|
|
#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
|
|
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
|
|
trace_sys_enter(regs, syscall_get_nr(current, regs));
|
|
#endif
|
|
}
|
|
|
|
void do_syscall_trace_exit(struct pt_regs *regs)
|
|
{
|
|
if (test_thread_flag(TIF_SYSCALL_TRACE))
|
|
tracehook_report_syscall_exit(regs, 0);
|
|
|
|
#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
|
|
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
|
|
trace_sys_exit(regs, regs->regs[0]);
|
|
#endif
|
|
}
|