mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
2.6 KiB
118 lines
2.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
// Copyright (C) 2005-2017 Andes Technology Corporation |
|
|
|
#include <linux/ptrace.h> |
|
#include <linux/regset.h> |
|
#include <linux/tracehook.h> |
|
#include <linux/elf.h> |
|
#include <linux/sched/task_stack.h> |
|
|
|
enum nds32_regset { |
|
REGSET_GPR, |
|
}; |
|
|
|
static int gpr_get(struct task_struct *target, |
|
const struct user_regset *regset, |
|
struct membuf to) |
|
{ |
|
return membuf_write(&to, &task_pt_regs(target)->user_regs, |
|
sizeof(struct user_pt_regs)); |
|
} |
|
|
|
static int 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 err; |
|
struct user_pt_regs newregs = task_pt_regs(target)->user_regs; |
|
|
|
err = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &newregs, 0, -1); |
|
if (err) |
|
return err; |
|
|
|
task_pt_regs(target)->user_regs = newregs; |
|
return 0; |
|
} |
|
|
|
static const struct user_regset nds32_regsets[] = { |
|
[REGSET_GPR] = { |
|
.core_note_type = NT_PRSTATUS, |
|
.n = sizeof(struct user_pt_regs) / sizeof(u32), |
|
.size = sizeof(elf_greg_t), |
|
.align = sizeof(elf_greg_t), |
|
.regset_get = gpr_get, |
|
.set = gpr_set} |
|
}; |
|
|
|
static const struct user_regset_view nds32_user_view = { |
|
.name = "nds32", |
|
.e_machine = EM_NDS32, |
|
.regsets = nds32_regsets, |
|
.n = ARRAY_SIZE(nds32_regsets) |
|
}; |
|
|
|
const struct user_regset_view *task_user_regset_view(struct task_struct *task) |
|
{ |
|
return &nds32_user_view; |
|
} |
|
|
|
void ptrace_disable(struct task_struct *child) |
|
{ |
|
user_disable_single_step(child); |
|
} |
|
|
|
/* do_ptrace() |
|
* |
|
* Provide ptrace defined service. |
|
*/ |
|
long arch_ptrace(struct task_struct *child, long request, unsigned long addr, |
|
unsigned long data) |
|
{ |
|
int ret = -EIO; |
|
|
|
switch (request) { |
|
default: |
|
ret = ptrace_request(child, request, addr, data); |
|
break; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
void user_enable_single_step(struct task_struct *child) |
|
{ |
|
struct pt_regs *regs; |
|
regs = task_pt_regs(child); |
|
regs->ipsw |= PSW_mskHSS; |
|
set_tsk_thread_flag(child, TIF_SINGLESTEP); |
|
} |
|
|
|
void user_disable_single_step(struct task_struct *child) |
|
{ |
|
struct pt_regs *regs; |
|
regs = task_pt_regs(child); |
|
regs->ipsw &= ~PSW_mskHSS; |
|
clear_tsk_thread_flag(child, TIF_SINGLESTEP); |
|
} |
|
|
|
/* sys_trace() |
|
* |
|
* syscall trace handler. |
|
*/ |
|
|
|
asmlinkage int syscall_trace_enter(struct pt_regs *regs) |
|
{ |
|
if (test_thread_flag(TIF_SYSCALL_TRACE)) { |
|
if (tracehook_report_syscall_entry(regs)) |
|
forget_syscall(regs); |
|
} |
|
return regs->syscallno; |
|
} |
|
|
|
asmlinkage void syscall_trace_leave(struct pt_regs *regs) |
|
{ |
|
int step = test_thread_flag(TIF_SINGLESTEP); |
|
if (step || test_thread_flag(TIF_SYSCALL_TRACE)) |
|
tracehook_report_syscall_exit(regs, step); |
|
|
|
}
|
|
|