1 /*
2 * ThreadX API Runtime Error Support
3 *
4 * Copyright 1983-2019 Green Hills Software LLC.
5 *
6 * This program is the property of Green Hills Software LLC.,
7 * its contents are proprietary information and no part of it
8 * is to be disclosed to anyone except employees of Green Hills
9 * Software LLC., or as agreed in writing signed by the President
10 * of Green Hills Software LLC.
11 */
12
13 /* #include "tx_ghs.h" */
14 #ifndef TX_DISABLE_ERROR_CHECKING
15 #define TX_DISABLE_ERROR_CHECKING
16 #endif
17 #include "tx_api.h"
18
19 /* Customized ThreadX API runtime error support routine. */
20
21 void _rnerr(int num, int linenum, const char*str, void*ptr, ...);
22
23 /* __ghs_rnerr()
24 This is the custom runtime error checking routine.
25 This implementation uses the existing __rnerr() routine.
26 Another implementation could use the .syscall mechanism,
27 provided MULTI was modified to understand that.
28 */
__ghs_rnerr(char * errMsg,int stackLevels,int stackTraceDisplay,void * hexVal)29 void __ghs_rnerr(char *errMsg, int stackLevels, int stackTraceDisplay, void *hexVal) {
30 TX_INTERRUPT_SAVE_AREA
31 int num;
32 /*
33 Initialize the stack levels value.
34
35 Add 3 to account for the calls to _rnerr, __rnerr, and
36 __ghs_rnerr.
37
38 If the implementation changes, calls to __ghs_rnerr
39 will not need to be changed.
40
41 Zero is not permitted, so substitute 3 in that case.
42 */
43 num = (stackLevels+3) & 0xf;
44 if (!num) {
45 num = 3;
46 }
47 /*
48 Shift the stack levels value to bits 12..15 and
49 insert the stack trace display value in bit 11.
50 Bits 0..10 are unused.
51 */
52 num = (num << 12) | (stackTraceDisplay ? 0x800 : 0);
53
54 /* This will mask all interrupts in the RTEC code, which is probably
55 unacceptable for many targets. */
56 TX_DISABLE
57 _rnerr(num, -1, (const char *)hexVal, (void *)errMsg);
58 TX_RESTORE
59 }
60
61
62 /* ThreadX thread stack checking runtime support routine. */
63
64 extern char __ghsbegin_stack[];
65
__stkchk(void)66 void __stkchk(void) {
67 int i;
68 TX_THREAD *current_thread_ptr;
69
70 /* Pickup current thread pointer. */
71 TX_THREAD_GET_CURRENT(current_thread_ptr)
72
73 if(current_thread_ptr)
74 {
75 if((unsigned)(&i) <=
76 (unsigned)(current_thread_ptr -> tx_thread_stack_start))
77 {
78 _rnerr(21, -1, 0, 0);
79 }
80 }
81 else
82 {
83 if((unsigned)(&i) <= (unsigned)__ghsbegin_stack)
84 {
85 _rnerr(21, -1, 0, 0);
86 }
87 }
88 }
89
