1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-02-03 lizhirui first version
* 2022-11-10 WangXiaoyao Add readable syscall tracing
*/
#include <rthw.h>
#include <rtthread.h>
#define DBG_TAG "syscall"
#define DBG_LVL DBG_WARNING
#include <rtdbg.h>
#include <mmu.h>
#include <page.h>
#include <stack.h>
#include <lwp_user_mm.h>
typedef rt_ubase_t (*syscallfunc_t)(rt_ubase_t, rt_ubase_t, rt_ubase_t, rt_ubase_t, rt_ubase_t, rt_ubase_t, rt_ubase_t);
void syscall_handler(struct rt_hw_stack_frame *regs)
{
const char *syscall_name;
int syscallid = regs->a7;
if (syscallid == 0)
{
LOG_E("syscall id = 0!\n");
while (RT_TRUE)
{
rt_hw_cpu_relax();
}
}
syscallfunc_t syscallfunc = (syscallfunc_t)lwp_get_sys_api(syscallid);
if (syscallfunc == RT_NULL)
{
LOG_E("unsupported syscall!\n");
sys_exit_group(-1);
}
#if DBG_LVL >= DBG_INFO
syscall_name = lwp_get_syscall_name(syscallid);
#else
RT_UNUSED(syscall_name);
#endif
LOG_I("[0x%lx] %s(0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx)", rt_thread_self(), syscall_name,
regs->a0, regs->a1, regs->a2, regs->a3, regs->a4, regs->a5, regs->a6);
regs->a0 = syscallfunc(regs->a0, regs->a1, regs->a2, regs->a3, regs->a4, regs->a5, regs->a6);
regs->a7 = 0;
regs->epc += 4; // skip ecall instruction
LOG_I("[0x%lx] %s ret: 0x%lx", rt_thread_self(), syscall_name, regs->a0);
}
|
