Hello
I am using the latest version of cygwin to compile c++ programs into to
mips-elfs, and I have several serious problems. One in particular is that fact
that the allocation and deallocation of memory on the stack for function and
procedure calls is not done correctly. For some reason the compiler allocates
memory on the stack by issuing a Addui sp,sp with some negative number, however
the negative number is only sixteen bits and therefore because the instruction
is an add unsigned immediate this negative number gets treated like a positve
number. Now once the statements in the function have been executed, you get to
the code which attempts to deallocate the space on the stack which was
allocated at the beginning, well the compiler does this by issuing another
addui but this time using the positve version of the number which was used
before, well this part would work just fine if the prior allocation had been
done with an add immediate instruction but because it doesn't what happens is
the stack grows a little more now you can imagine this can become a problem
very quickly, causing stack overflow. I have pasted in some dissasembly code
below for you guys to take a look just look at any one of the function at the
allocation and deallocation of memory on the stack and you'll see it.
senchk.bin: file format elf32-tradbigmips
Disassembly of section .text:
00000000 <start>:
start():
0: 201c2fa8 addi gp,zero,12200
4: 0c00010f jal 43c <main>
8: 00000000 nop
0000000c <_exit>:
c: 1000ffff 00000000 ........
00000014 <_Z10delay_funcii>:
_Z10delay_funcii():
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:5
#ifndef _DELAY_FUNC_H_
#define _DELAY_FUNC_H_
void delay_func (int delay_count, int time_scale)
{
14: 27bdfff0 addiu sp,sp,-16
18: afbe0008 sw s8,8(sp)
1c: 03a0f021 move s8,sp
20: afc40010 sw a0,16(s8)
24: afc50014 sw a1,20(s8)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:8
int delay_counter;
if ( time_scale == 1 ) {
28: 8fc30014 lw v1,20(s8)
2c: 24020001 li v0,1
30: 14620018 bne v1,v0,94 <_Z10delay_funcii+0x80>
34: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:11
delay_counter = 0;
38: afc00000 sw zero,0(s8)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:12
while ( delay_counter != delay_count * 5000000 ) { // changed
from 50000000 to 5000000 because the time was too long, it exceed a second by
about 6 times
3c: 8fc40010 lw a0,16(s8)
40: 00000000 nop
44: 00801021 move v0,a0
48: 00021940 sll v1,v0,0x5
4c: 00641823 subu v1,v1,a0
50: 00031180 sll v0,v1,0x6
54: 00431023 subu v0,v0,v1
58: 000210c0 sll v0,v0,0x3
5c: 00441021 addu v0,v0,a0
60: 00021880 sll v1,v0,0x2
64: 00431021 addu v0,v0,v1
68: 00021980 sll v1,v0,0x6
6c: 8fc20000 lw v0,0(s8)
70: 00000000 nop
74: 10620052 beq v1,v0,1c0 <_Z10delay_funcii+0x1ac>
78: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:14
delay_counter ++;
7c: 8fc20000 lw v0,0(s8)
80: 00000000 nop
84: 24420001 addiu v0,v0,1
88: afc20000 sw v0,0(s8)
8c: 1000ffeb b 3c <_Z10delay_funcii+0x28>
90: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:18
}
} else if ( time_scale == 2 ) {
94: 8fc30014 lw v1,20(s8)
98: 24020002 li v0,2
9c: 14620016 bne v1,v0,f8 <_Z10delay_funcii+0xe4>
a0: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:21
delay_counter = 0;
a4: afc00000 sw zero,0(s8)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:22
while ( delay_counter != delay_count * 5000 ) {
a8: 8fc30010 lw v1,16(s8)
ac: 00000000 nop
b0: 00601021 move v0,v1
b4: 00021080 sll v0,v0,0x2
b8: 00431021 addu v0,v0,v1
bc: 000210c0 sll v0,v0,0x3
c0: 00431023 subu v0,v0,v1
c4: 00021100 sll v0,v0,0x4
c8: 00431021 addu v0,v0,v1
cc: 000218c0 sll v1,v0,0x3
d0: 8fc20000 lw v0,0(s8)
d4: 00000000 nop
d8: 10620039 beq v1,v0,1c0 <_Z10delay_funcii+0x1ac>
dc: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:24
delay_counter ++;
e0: 8fc20000 lw v0,0(s8)
e4: 00000000 nop
e8: 24420001 addiu v0,v0,1
ec: afc20000 sw v0,0(s8)
f0: 1000ffed b a8 <_Z10delay_funcii+0x94>
f4: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:27
}
} else if ( time_scale == 3 ) {
f8: 8fc30014 lw v1,20(s8)
fc: 24020003 li v0,3
100: 14620014 bne v1,v0,154 <_Z10delay_funcii+0x140>
104: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:29
delay_counter = 0;
108: afc00000 sw zero,0(s8)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:30
while ( delay_counter != delay_count * 50 ) {
10c: 8fc30010 lw v1,16(s8)
110: 00000000 nop
114: 00601021 move v0,v1
118: 00021040 sll v0,v0,0x1
11c: 00431021 addu v0,v0,v1
120: 000210c0 sll v0,v0,0x3
124: 00431021 addu v0,v0,v1
128: 00021840 sll v1,v0,0x1
12c: 8fc20000 lw v0,0(s8)
130: 00000000 nop
134: 10620022 beq v1,v0,1c0 <_Z10delay_funcii+0x1ac>
138: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:32
delay_counter ++;
13c: 8fc20000 lw v0,0(s8)
140: 00000000 nop
144: 24420001 addiu v0,v0,1
148: afc20000 sw v0,0(s8)
14c: 1000ffef b 10c <_Z10delay_funcii+0xf8>
150: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:35
}
} else if ( time_scale == 4 ) {
154: 8fc30014 lw v1,20(s8)
158: 24020004 li v0,4
15c: 14620018 bne v1,v0,1c0 <_Z10delay_funcii+0x1ac>
160: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:37
delay_counter = 0;
164: afc00000 sw zero,0(s8)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:39
if ( delay_count >= 20 ) {
168: 8fc20010 lw v0,16(s8)
16c: 00000000 nop
170: 28420014 slti v0,v0,20
174: 14400012 bnez v0,1c0 <_Z10delay_funcii+0x1ac>
178: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:41
while ( delay_counter != delay_count / 20 ) {
17c: 8fc30010 lw v1,16(s8)
180: 24020014 li v0,20
184: 0062001a div zero,v1,v0
188: 14400002 bnez v0,194 <_Z10delay_funcii+0x180>
18c: 00000000 nop
190: 0007000d break 0x7
194: 00001812 mflo v1
198: 8fc20000 lw v0,0(s8)
19c: 00000000 nop
1a0: 10620007 beq v1,v0,1c0 <_Z10delay_funcii+0x1ac>
1a4: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:43
delay_counter ++;
1a8: 8fc20000 lw v0,0(s8)
1ac: 00000000 nop
1b0: 24420001 addiu v0,v0,1
1b4: afc20000 sw v0,0(s8)
1b8: 1000fff0 b 17c <_Z10delay_funcii+0x168>
1bc: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/DELAY_FUNC.H:50
}
}
} else {
return;
}
}
1c0: 03c0e821 move sp,s8
1c4: 8fbe0008 lw s8,8(sp)
1c8: 27bd0010 addiu sp,sp,16
1cc: 03e00008 jr ra
1d0: 00000000 nop
000001d4 <_Z15i2c_range_rd_wrii>:
_Z15i2c_range_rd_wrii():
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:4
#ifndef _I2C_RANGE_RD_WR_H_
#define _I2C_RANGE_RD_WR_H_
void i2c_range_rd_wr (int sensor_sel, int op_sel) {
1d4: 27bdfff0 addiu sp,sp,-16
1d8: afbe0008 sw s8,8(sp)
1dc: 03a0f021 move s8,sp
1e0: afc40010 sw a0,16(s8)
1e4: afc50014 sw a1,20(s8)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:8
// I2C address format
// 7 6 5 4 3 2 1 0
switch (sensor_sel) { // <-------Address---------->
Read/Write Bit
1e8: 8fc20010 lw v0,16(s8)
1ec: 00000000 nop
1f0: afc20000 sw v0,0(s8)
1f4: 24020002 li v0,2
1f8: 8fc30000 lw v1,0(s8)
1fc: 00000000 nop
200: 10620028 beq v1,v0,2a4 <_Z15i2c_range_rd_wrii+0xd0>
204: 00000000 nop
208: 8fc30000 lw v1,0(s8)
20c: 00000000 nop
210: 28620003 slti v0,v1,3
214: 10400008 beqz v0,238 <_Z15i2c_range_rd_wrii+0x64>
218: 00000000 nop
21c: 24020001 li v0,1
220: 8fc30000 lw v1,0(s8)
224: 00000000 nop
228: 1062000a beq v1,v0,254 <_Z15i2c_range_rd_wrii+0x80>
22c: 00000000 nop
230: 10000042 b 33c <_Z15i2c_range_rd_wrii+0x168>
234: 00000000 nop
238: 24020003 li v0,3
23c: 8fc30000 lw v1,0(s8)
240: 00000000 nop
244: 1062002b beq v1,v0,2f4 <_Z15i2c_range_rd_wrii+0x120>
248: 00000000 nop
24c: 1000003b b 33c <_Z15i2c_range_rd_wrii+0x168>
250: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:12
case 1: //Right Sensor
if ( op_sel == 2 ) {
254: 8fc30014 lw v1,20(s8)
258: 24020002 li v0,2
25c: 14620007 bne v1,v0,27c <_Z15i2c_range_rd_wrii+0xa8>
260: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:14
*i2c_interface = 0xE603E700; // READ
264: 8f82ff48 lw v0,-184(gp)
268: 3c03e603 lui v1,0xe603
26c: 3463e700 ori v1,v1,0xe700
270: ac430000 sw v1,0(v0)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:15
break;
274: 10000031 b 33c <_Z15i2c_range_rd_wrii+0x168>
278: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:17
} else if ( op_sel == 1 ) {
27c: 8fc30014 lw v1,20(s8)
280: 24020001 li v0,1
284: 1462002d bne v1,v0,33c <_Z15i2c_range_rd_wrii+0x168>
288: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:19
*i2c_interface = 0xE6005100; // WRITE
28c: 8f82ff48 lw v0,-184(gp)
290: 3c03e600 lui v1,0xe600
294: 34635100 ori v1,v1,0x5100
298: ac430000 sw v1,0(v0)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:20
break;
29c: 10000027 b 33c <_Z15i2c_range_rd_wrii+0x168>
2a0: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:30
} else {
break;
}
case 2: //Middle Sensor
if ( op_sel == 2 ) {
2a4: 8fc30014 lw v1,20(s8)
2a8: 24020002 li v0,2
2ac: 14620007 bne v1,v0,2cc <_Z15i2c_range_rd_wrii+0xf8>
2b0: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:32
*i2c_interface = 0xE803E900;
2b4: 8f82ff48 lw v0,-184(gp)
2b8: 3c03e803 lui v1,0xe803
2bc: 3463e900 ori v1,v1,0xe900
2c0: ac430000 sw v1,0(v0)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:33
break;
2c4: 1000001d b 33c <_Z15i2c_range_rd_wrii+0x168>
2c8: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:34
} else if ( op_sel == 1 ) {
2cc: 8fc30014 lw v1,20(s8)
2d0: 24020001 li v0,1
2d4: 14620019 bne v1,v0,33c <_Z15i2c_range_rd_wrii+0x168>
2d8: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:36
*i2c_interface = 0xE8005100;
2dc: 8f82ff48 lw v0,-184(gp)
2e0: 3c03e800 lui v1,0xe800
2e4: 34635100 ori v1,v1,0x5100
2e8: ac430000 sw v1,0(v0)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:37
break;
2ec: 10000013 b 33c <_Z15i2c_range_rd_wrii+0x168>
2f0: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:45
} else {
break;
}
case 3: //Left Sensor
if ( op_sel == 2 ) {
2f4: 8fc30014 lw v1,20(s8)
2f8: 24020002 li v0,2
2fc: 14620007 bne v1,v0,31c <_Z15i2c_range_rd_wrii+0x148>
300: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:47
*i2c_interface = 0xEA03EB00;
304: 8f82ff48 lw v0,-184(gp)
308: 3c03ea03 lui v1,0xea03
30c: 3463eb00 ori v1,v1,0xeb00
310: ac430000 sw v1,0(v0)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:48
break;
314: 10000009 b 33c <_Z15i2c_range_rd_wrii+0x168>
318: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:49
} else if ( op_sel == 1 ) {
31c: 8fc30014 lw v1,20(s8)
320: 24020001 li v0,1
324: 14620005 bne v1,v0,33c <_Z15i2c_range_rd_wrii+0x168>
328: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:51
*i2c_interface = 0xEA051000;
32c: 8f82ff48 lw v0,-184(gp)
330: 3c03ea05 lui v1,0xea05
334: 34631000 ori v1,v1,0x1000
338: ac430000 sw v1,0(v0)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/I2C_RANGE_RD_WR.H:63
break;
} else {
break;
}
default:
break;
}
}
33c: 03c0e821 move sp,s8
340: 8fbe0008 lw s8,8(sp)
344: 27bd0010 addiu sp,sp,16
348: 03e00008 jr ra
34c: 00000000 nop
00000350 <_Z9init_funcv>:
_Z9init_funcv():
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:4
#ifndef _INIT_FUNC_H_
#define _INIT_FUNC_H_
void init_func (void) {
350: 27bdffd8 addiu sp,sp,-40
354: afbf0024 sw ra,36(sp)
358: afbe0020 sw s8,32(sp)
35c: 03a0f021 move s8,sp
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:6
int five_seconds = 2500000;
360: 3c020026 lui v0,0x26
364: 344225a0 ori v0,v0,0x25a0
368: afc20010 sw v0,16(s8)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:8
int idle = 1500;
36c: 240205dc li v0,1500
370: afc20014 sw v0,20(s8)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:9
int right = 1000;
374: 240203e8 li v0,1000
378: afc20018 sw v0,24(s8)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:10
int left = 2000;
37c: 240207d0 li v0,2000
380: afc2001c sw v0,28(s8)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:12
*i2c_clk_gen = I2C_SPI_100Kbps;
384: 8f83ff3c lw v1,-196(gp)
388: 24020001 li v0,1
38c: ac620000 sw v0,0(v1)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:13
*spi_clk_gen = I2C_SPI_3Mbps;
390: 8f83ff40 lw v1,-192(gp)
394: 24020003 li v0,3
398: ac620000 sw v0,0(v1)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:14
*baud_rate_gen = Baud9600;
39c: 8f83ff44 lw v1,-188(gp)
3a0: 24020005 li v0,5
3a4: ac620000 sw v0,0(v1)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:16
*throttle_pwm = idle;
3a8: 8f83ff58 lw v1,-168(gp)
3ac: 8fc20014 lw v0,20(s8)
3b0: 00000000 nop
3b4: ac620000 sw v0,0(v1)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:18
*seven_segment_display = 0;
3b8: 8f82ff6c lw v0,-148(gp)
3bc: 00000000 nop
3c0: ac400000 sw zero,0(v0)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:20
*steering_pwm = left;
3c4: 8f83ff54 lw v1,-172(gp)
3c8: 8fc2001c lw v0,28(s8)
3cc: 00000000 nop
3d0: ac620000 sw v0,0(v1)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:21
delay_func(40,nanoseconds);
3d4: 24040028 li a0,40
3d8: 24050004 li a1,4
3dc: 0c000005 jal 14 <_Z10delay_funcii>
3e0: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:23
*steering_pwm = right;
3e4: 8f83ff54 lw v1,-172(gp)
3e8: 8fc20018 lw v0,24(s8)
3ec: 00000000 nop
3f0: ac620000 sw v0,0(v1)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:24
delay_func(40,nanoseconds);
3f4: 24040028 li a0,40
3f8: 24050004 li a1,4
3fc: 0c000005 jal 14 <_Z10delay_funcii>
400: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:27
*steering_pwm = idle;
404: 8f83ff54 lw v1,-172(gp)
408: 8fc20014 lw v0,20(s8)
40c: 00000000 nop
410: ac620000 sw v0,0(v1)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:28
delay_func(40,nanoseconds);
414: 24040028 li a0,40
418: 24050004 li a1,4
41c: 0c000005 jal 14 <_Z10delay_funcii>
420: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/INIT_FUNC.H:32
//*seven_segment_display = temp_sensor;
}
424: 03c0e821 move sp,s8
428: 8fbf0024 lw ra,36(sp)
42c: 8fbe0020 lw s8,32(sp)
430: 27bd0028 addiu sp,sp,40
434: 03e00008 jr ra
438: 00000000 nop
0000043c <main>:
main():
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:8
#include "INIT_FUNC.H"
int main()
{
43c: 27bdffe8 addiu sp,sp,-24
440: afbf0014 sw ra,20(sp)
444: afbe0010 sw s8,16(sp)
448: 03a0f021 move s8,sp
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:10
init_func();
44c: 0c0000d4 jal 350 <_Z9init_funcv>
450: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:11
*power_register = 0;
454: 8f82ff74 lw v0,-140(gp)
458: 00000000 nop
45c: ac400000 sw zero,0(v0)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:13
while ( *usr_cntrl_reg != 255 ) {
460: 8f82ff38 lw v0,-200(gp)
464: 00000000 nop
468: 8c430000 lw v1,0(v0)
46c: 240200ff li v0,255
470: 10620037 beq v1,v0,550 <main+0x114>
474: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:15
if ( *usr_cntrl_reg != 0 ) {
478: 8f82ff38 lw v0,-200(gp)
47c: 00000000 nop
480: 8c420000 lw v0,0(v0)
484: 00000000 nop
488: 1040fff5 beqz v0,460 <main+0x24>
48c: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:17
*led_register = *usr_cntrl_reg;
490: 8f82ff70 lw v0,-144(gp)
494: 8f83ff38 lw v1,-200(gp)
498: 00000000 nop
49c: 8c630000 lw v1,0(v1)
4a0: 00000000 nop
4a4: ac430000 sw v1,0(v0)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:19
while ( *power_register != 11 ) {
4a8: 8f82ff74 lw v0,-140(gp)
4ac: 00000000 nop
4b0: 8c430000 lw v1,0(v0)
4b4: 2402000b li v0,11
4b8: 1062000e beq v1,v0,4f4 <main+0xb8>
4bc: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:21
delay_func(1,microseconds);
4c0: 24040001 li a0,1
4c4: 24050003 li a1,3
4c8: 0c000005 jal 14 <_Z10delay_funcii>
4cc: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:22
*power_register = *power_register + 1;
4d0: 8f83ff74 lw v1,-140(gp)
4d4: 8f82ff74 lw v0,-140(gp)
4d8: 00000000 nop
4dc: 8c420000 lw v0,0(v0)
4e0: 00000000 nop
4e4: 24420001 addiu v0,v0,1
4e8: ac620000 sw v0,0(v1)
4ec: 1000ffee b 4a8 <main+0x6c>
4f0: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:25
}
*seven_segment_display = 3;
4f4: 8f83ff6c lw v1,-148(gp)
4f8: 24020003 li v0,3
4fc: ac620000 sw v0,0(v1)
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:27
while ( *usr_cntrl_reg != 255 ) {
500: 8f82ff38 lw v0,-200(gp)
504: 00000000 nop
508: 8c430000 lw v1,0(v0)
50c: 240200ff li v0,255
510: 1062ffd3 beq v1,v0,460 <main+0x24>
514: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:29
i2c_range_rd_wr(1, 1);
518: 24040001 li a0,1
51c: 24050001 li a1,1
520: 0c000075 jal 1d4 <_Z15i2c_range_rd_wrii>
524: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:30
delay_func(70,microseconds);
528: 24040046 li a0,70
52c: 24050003 li a1,3
530: 0c000005 jal 14 <_Z10delay_funcii>
534: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:31
i2c_range_rd_wr(1, 2);
538: 24040001 li a0,1
53c: 24050002 li a1,2
540: 0c000075 jal 1d4 <_Z15i2c_range_rd_wrii>
544: 00000000 nop
548: 1000ffed b 500 <main+0xc4>
54c: 00000000 nop
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:40
}
}
}
// visually inspect the new addresses you should see the numbers 0 1 2 3 4 5 6
appear in binary little endian
return (0);
550: 00001021 move v0,zero
/cygdrive/c/users/TheOne1/sde-6.06/sde/examples/Init_Program/sensor_display_check_program.cpp:41
}
554: 03c0e821 move sp,s8
558: 8fbf0014 lw ra,20(sp)
55c: 8fbe0010 lw s8,16(sp)
560: 27bd0018 addiu sp,sp,24
564: 03e00008 jr ra
568: 00000000 nop
--
Summary: MIPS stack overflow caused by addui instruction
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: derrick_chi at msn dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35788
