Describe the bug
I am currently trying to run Zephyr7.0 on a development board equipped with MCU: NXP MIMXRT1061 CVL5A.
I simply compiled a sample: \samples\basic\blinky, but it couldn't run correctly.
At first I thought it was a problem with the XIP format that caused Zephyr to not be booted correctly, but then I used SWD to debug it and found that it was booted correctly.
But when calling: /zephyr/arch/arm/core/aarch32/prep_c.c: z_bss_zero(); function Zephyr went wrong
Compilation process
The board I use is mimxrt1060_evk, theoretically there is no problem, because 1061 is based on 1060
west build -p auto -b mimxrt1060_evk .\samples\basic\blinky\
west flash
Debugging process
The first debugging was broken at z_interrupt_stacks
z_arm_reset () at C:/Users/zhihao3x/work/zephyrproject/zephyr/arch/arm/core/aarch32/cortex_m\reset.S:105
105 msr BASEPRI, r0
(gdb) n
134 ldr r0, =z_interrupt_stacks
(gdb) n
135 ldr r1, =CONFIG_ISR_STACK_SIZE + MPU_GUARD_ALIGN_AND_SIZE
(gdb) n
136 adds r0, r0, r1
(gdb) n
137 msr PSP, r0
(gdb)
138 mrs r0, CONTROL
(gdb)
139 movs r1, #2
(gdb)
140 orrs r0, r1 /* CONTROL_SPSEL_Msk */
(gdb)
141 msr CONTROL, r0
(gdb)
147 isb
(gdb)
154 bl z_arm_prep_c
(gdb)
134 ldr r0, =z_interrupt_stacks
(gdb)
Program received signal SIGTRAP, Trace/breakpoint trap.
(gdb)
Later, I used single-step debugging and found that Zephyr reached z_bss_zero
(gdb)
z_arm_floating_point_init ()
at C:/Users/zhihao3x/work/zephyrproject/modules/hal/cmsis/CMSIS/Core/Include/cmsis_gcc.h:1003
1003 __ASM volatile ("MSR control, %0" : : "r" (control) : "memory");
(gdb)
163 __set_CONTROL(__get_CONTROL() & (~(CONTROL_FPCA_Msk)));
(gdb)
0x6000305c in __set_CONTROL (control=3758157056)
at C:/Users/zhihao3x/work/zephyrproject/modules/hal/cmsis/CMSIS/Core/Include/cmsis_gcc.h:1003
1003 __ASM volatile ("MSR control, %0" : : "r" (control) : "memory");
(gdb)
1004 __ISB();
(gdb)
__ISB () at C:/Users/zhihao3x/work/zephyrproject/modules/hal/cmsis/CMSIS/Core/Include/cmsis_gcc.h:260
260 __ASM volatile ("isb 0xF":::"memory");
(gdb)
z_arm_prep_c () at C:/Users/zhihao3x/work/zephyrproject/zephyr/arch/arm/core/aarch32/prep_c.c:183
183 z_bss_zero();
(gdb) n
Program received signal SIGTRAP, Trace/breakpoint trap.
0x62652dc0 in ?? ()
Eventually I located the problem in the memset function，when this function is called, it will fall into an infinite loop and then my program will crash
z_arm_prep_c () at C:/Users/zhihao3x/work/zephyrproject/zephyr/arch/arm/core/aarch32/prep_c.c:183
183 z_bss_zero();
(gdb)
z_bss_zero () at C:/Users/zhihao3x/work/zephyrproject/zephyr/kernel/init.c:89
89 (void)memset(__bss_start, 0, __bss_end - __bss_start);
(gdb)
memset (buf=0x80000030 <z_idle_threads>, c=c#entry=0, n=428)
at C:/Users/zhihao3x/work/zephyrproject/zephyr/lib/libc/minimal/source/string/string.c:355
(gdb)
Program received signal SIGTRAP, Trace/breakpoint trap.
0x63f5fbf8 in ?? ()
Later I tried to debug the memset function and found that the dest address did not change during the loop
Very strange, I do not specify whether it is a gdb problem or a zephyr problem. The address is 0x80000030 before the increment, and 0x80000031 after the increment, and it changes back to 0x80000030 when the next cycle is repeated.
357 unsigned char c_byte = (unsigned char)c;
(gdb)
389 while (n > 0) {
(gdb)
390 *(d_byte++) = c_byte;
392 n--;
(gdb) p d_byte
$1 = (unsigned char *) 0x80000030 <z_idle_threads> "\b"
I tried to change the z_bss_zero function
(void)memset(__bss_start, 0, __bss_end - __bss_start);
Changed the size length
(void)memset(__bss_start, 0, 3);
But when I was debugging with gdb, I found that the while loop inside memset exceeded three times without stopping, and it entered an endless loop.
I speculate that there is a problem with the incremented code after these two lines of code, because when I use the gdb print command to print the value of the variable after each increment, the value of the variable does not change
*(d_byte++) = c_byte;
n--;
Another weird place is that when I use gdb to debug, I find that there is a pointer. Gdb will not break to this side, but skip this code and execute it. I doubt that the compiler is doing it to me. Is the code optimized?
More details
When I use next to execute z_bss_zero, gdb will break to an indeterminate address at 0xdeadbeee. I guess it may be that Zephyr destroyed the stack when initializing the memory.
(gdb)
z_arm_prep_c () at C:/Users/zhihao3x/work/zephyrproject/zephyr/arch/arm/core/aarch32/prep_c.c:183
183 z_bss_zero();
(gdb) n
Program received signal SIGTRAP, Trace/breakpoint trap.
0xdeadbeee in ?? ()
At the same time, the Jlink debugger also output an error log
ERROR: Cannot read register 15 (R15) while CPU is running
Reading all registers
ERROR: Cannot read register 0 (R0) while CPU is running
ERROR: Cannot read register 1 (R1) while CPU is running
ERROR: Cannot read register 2 (R2) while CPU is running
ERROR: Cannot read register 3 (R3) while CPU is running
ERROR: Cannot read register 4 (R4) while CPU is running
ERROR: Cannot read register 5 (R5) while CPU is running
ERROR: Cannot read register 6 (R6) while CPU is running
ERROR: Cannot read register 7 (R7) while CPU is running
ERROR: Cannot read register 8 (R8) while CPU is running
ERROR: Cannot read register 9 (R9) while CPU is running
ERROR: Cannot read register 10 (R10) while CPU is running
ERROR: Cannot read register 11 (R11) while CPU is running
ERROR: Cannot read register 12 (R12) while CPU is running
ERROR: Cannot read register 13 (R13) while CPU is running
ERROR: Cannot read register 14 (R14) while CPU is running
ERROR: Cannot read register 15 (R15) while CPU is running
ERROR: Cannot read register 16 (XPSR) while CPU is running
ERROR: Cannot read register 17 (MSP) while CPU is running
ERROR: Cannot read register 18 (PSP) while CPU is running
ERROR: Cannot read register 24 (PRIMASK) while CPU is running
ERROR: Cannot read register 25 (BASEPRI) while CPU is running
ERROR: Cannot read register 26 (FAULTMASK) while CPU is running
ERROR: Cannot read register 27 (CONTROL) while CPU is running
ERROR: Cannot read register 32 (FPSCR) while CPU is running
ERROR: Cannot read register 33 (FPS0) while CPU is running
ERROR: Cannot read register 34 (FPS1) while CPU is running
ERROR: Cannot read register 35 (FPS2) while CPU is running
ERROR: Cannot read register 36 (FPS3) while CPU is running
ERROR: Cannot read register 37 (FPS4) while CPU is running
ERROR: Cannot read register 38 (FPS5) while CPU is running
ERROR: Cannot read register 39 (FPS6) while CPU is running
ERROR: Cannot read register 40 (FPS7) while CPU is running
ERROR: Cannot read register 41 (FPS8) while CPU is running
ERROR: Cannot read register 42 (FPS9) while CPU is running
ERROR: Cannot read register 43 (FPS10) while CPU is running
ERROR: Cannot read register 44 (FPS11) while CPU is running
ERROR: Cannot read register 45 (FPS12) while CPU is running
ERROR: Cannot read register 46 (FPS13) while CPU is running
ERROR: Cannot read register 47 (FPS14) while CPU is running
ERROR: Cannot read register 48 (FPS15) while CPU is running
ERROR: Cannot read register 49 (FPS16) while CPU is running
ERROR: Cannot read register 50 (FPS17) while CPU is running
ERROR: Cannot read register 51 (FPS18) while CPU is running
ERROR: Cannot read register 52 (FPS19) while CPU is running
ERROR: Cannot read register 53 (FPS20) while CPU is running
ERROR: Cannot read register 54 (FPS21) while CPU is running
ERROR: Cannot read register 55 (FPS22) while CPU is running
ERROR: Cannot read register 56 (FPS23) while CPU is running
ERROR: Cannot read register 57 (FPS24) while CPU is running
ERROR: Cannot read register 58 (FPS25) while CPU is running
ERROR: Cannot read register 59 (FPS26) while CPU is running
ERROR: Cannot read register 60 (FPS27) while CPU is running
ERROR: Cannot read register 61 (FPS28) while CPU is running
ERROR: Cannot read register 62 (FPS29) while CPU is running
ERROR: Cannot read register 63 (FPS30) while CPU is running
ERROR: Cannot read register 64 (FPS31) while CPU is running
ERROR: Cannot read register 33 (FPS0) while CPU is running
ERROR: Cannot read register 34 (FPS1) while CPU is running
ERROR: Cannot read register 35 (FPS2) while CPU is running
ERROR: Cannot read register 36 (FPS3) while CPU is running
ERROR: Cannot read register 37 (FPS4) while CPU is running
ERROR: Cannot read register 38 (FPS5) while CPU is running
ERROR: Cannot read register 39 (FPS6) while CPU is running
ERROR: Cannot read register 40 (FPS7) while CPU is running
ERROR: Cannot read register 41 (FPS8) while CPU is running
ERROR: Cannot read register 42 (FPS9) while CPU is running
ERROR: Cannot read register 43 (FPS10) while CPU is running
ERROR: Cannot read register 44 (FPS11) while CPU is running
ERROR: Cannot read register 45 (FPS12) while CPU is running
ERROR: Cannot read register 46 (FPS13) while CPU is running
ERROR: Cannot read register 47 (FPS14) while CPU is running
ERROR: Cannot read register 48 (FPS15) while CPU is running
ERROR: Cannot read register 49 (FPS16) while CPU is running
ERROR: Cannot read register 50 (FPS17) while CPU is running
ERROR: Cannot read register 51 (FPS18) while CPU is running
ERROR: Cannot read register 52 (FPS19) while CPU is running
ERROR: Cannot read register 53 (FPS20) while CPU is running
ERROR: Cannot read register 54 (FPS21) while CPU is running
ERROR: Cannot read register 55 (FPS22) while CPU is running
ERROR: Cannot read register 56 (FPS23) while CPU is running
ERROR: Cannot read register 57 (FPS24) while CPU is running
ERROR: Cannot read register 58 (FPS25) while CPU is running
ERROR: Cannot read register 59 (FPS26) while CPU is running
ERROR: Cannot read register 60 (FPS27) while CPU is running
ERROR: Cannot read register 61 (FPS28) while CPU is running
ERROR: Cannot read register 62 (FPS29) while CPU is running
ERROR: Cannot read register 63 (FPS30) while CPU is running
ERROR: Cannot read register 64 (FPS31) while CPU is running
Removing breakpoint # address 0x60003068, Size = 2
WARNING: Failed to read memory # address 0xDEADBEEE
Jlink output
The following is the MCU information output by Jlink, I am not sure if this version is supported by Zephyr
-----GDB Server start settings-----
GDBInit file: none
GDB Server Listening port: 2331
SWO raw output listening port: 2332
Terminal I/O port: 2333
Accept remote connection: localhost only
Generate logfile: off
Verify download: off
Init regs on start: off
Silent mode: on
Single run mode: on
Target connection timeout: 5000 ms
------J-Link related settings------
J-Link Host interface: USB
J-Link script: none
J-Link settings file: none
------Target related settings------
Target device: MIMXRT1062xxx6A
Target interface: SWD
Target interface speed: auto
Target endian: little
I have tried hard for seven days and still can’t solve this problem. I tried to switch the version of Zephyr and also used platform IO to generate elf and bin files, but they were all ineffective. Please help me. Thank you very much.
Related
My application randomly and rarely crashes with segmentation fault signal.
When coredump is opened in GDB following can be seen:
arm instruction leading to crash is:
0x7f8ea08130 fd 7b b7 a9 stp x29, x30, [sp,#-144]!
When code of crashed frame is browsed in GDB, breakpoint stops at opening curly brace of a function:
void SomeClass::someMethod(const std::string& s, int i)
>{
...
}
examining of 'sp' register gives following output:
x $sp
>~"0x7fc761a070:\t0xc761a270\n"
x $sp-144\n"
>~"0x7fc7619fe0:\t"
>&"Cannot access memory at address 0x7fc7619fe0\n"
>169^error,msg="Cannot access memory at address 0x7fc7619fe0"
stack trace seems fine and not corrupted
there are roughly 300 frames in stack and stack size limit is set to be 8192K
UPD: the pagesize in the system is 4k:
>grep -i pagesize /proc/1/smaps
KernelPageSize: 4 kB
MMUPageSize: 4 kB
What else I can check to debug this issue?
This is my first question.If I have missed to add any information. Please let me know.
I am getting below error while executing a batch program.
ORA-24550: signal received: [si_signo=4] [si_errno=0] [si_code=30] [si_addr=0]
kpedbg_dmp_stack()+364<-kpeDbgCrash()+124<-kpeDbgSignalHandler()+680<-skgesig_sigactionHandler()+264<-__sighandler()<-00000000<-00000000
./PRMS_RlsRTS[231]: 53543194 Illegal instruction(coredump).
libdebug assertion "(framep->getGpr(STKP, &addr) == DB_SUCCESS && *nextStkpp == addr)" failed at line 1299 in file ../../../../../../../../../../../src/bos/usr/ccs/lib/libdbx/libdebug/modules/stackdebug/POWER/stackdb_FrameProgress.C
Illegal instruction in . at 0x0 ($t1)
0x00000000 00000000 Invalid opcode.
This is a pro *C program running it on AIX 7.1 with Oracle Client 12.1.
In a Windows Application I created I am attempting to run a batch file that points to a .vbs. It runs the vbs script but it does not modify the registry as needed. However, if I run the batch file manually it functions properly. Does anyone have any insight as to what could be the issue? I thought it was permissions but why would it matter if I manually click on the batch file or if my program opens it? Regardless, I have modified the batch file to try to run as admin but nothing online seems to work.
It says nowhere that CreateProcess can run batch files. As batch files aren't programs CreateProcess can't do anything with it. CMD.exe executes batch files.
YOU WOULD HAVE KNOWN THIS BY TESTING THE RETURN VALUE and by reading the Docs
From Help
Return Value
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
Also from Help
To run a batch file, you must start the command interpreter; set lpApplicationName to cmd.exe and set lpCommandLine to the name of the batch file.
This is What You are Doing Wrong
1. You have a bizzare program design.
Any program can prompt for user input and write to the registry. You are writing a program that will have at least four different ways of writing the registry (.NET, WSH, WMI, API). Then you run a batch that has two ways of writing the registry (WMI and reg.exe). Then a vbs file with two ways (WMI, WSH).
2. You do not test for errors.
You must test for errors. The only person with access to the error is YOU. Errors say what happened. You must fix the error or crash. And there is no point asking without the error number, error source, what it was trying to do, and the parameters.
Errors are to be expected. Users do delete or move files for example.
3. You must read the documentation
It has to be open while you program. It explains what you need to tell it for it to behave in certain ways. Just typing random commands (as many here do - they are invalid of course) OR typing random parameters (as you are) doesn't work. If you don't read them you don't know what they mean.
4. Playing helpless
When you get told the answer, you go and look everything up in the documentation, and then google it.
You not reply with a pathetic "it didn't work". You post the error number, error source, what it was trying to do, and the parameters.
This is how to decode errors
Decoding Errors
-2147220978 style numbers are 32 bit signed integers, convert to hex with calculator.
Windows errors (smallish numbers) and COM HResults (typically, but with exceptions, start with an 8 as in 0x80040154) are defined in WinError.h, except 8007nnnn where you look up the Window error number that it contains.
As a general rule Windows errors are less than 65,535 (0xFFFF). Errors starting 0x80000001 are Component Object Model (COM) HResults. Errors starting 0xC0000001 are NTStatus results. Errors starting 0xD0000001 are also NTStatus values returned in a HResult.
NTStatus errors (typically but not always start with an C as in 0xC0000022) are defined in NTStatus.h.
.h files are the best source because it includes the symbolic name of the error which can give clues such as the source of the error. FormatMessage doesn't give the symbolic name only the description.
You get these files by downloading the Platform SDK (it's gigabytes)
http://www.microsoft.com/en-us/download/details.aspx%3Fid%3D8279&sa=U&ei=w2IrULDDLsHFmAWbmIHoBg&ved=0CBwQFjAA&usg=AFQjCNHZn9-4f2NnuN9o3UWUsOF3wL7HBQ
If you just want the two files I have them on my skydrive so I can reference them anywhere I go.
https://skydrive.live.com/redir?resid=E2F0CE17A268A4FA!121
Note internet errors (12,000 - 12,999) are windows errors but are specified in wininet.h also available above.
There are errors defined in other .h files. But 99% are in the three above.
Structure of HResults and NTStatus Codes
The most significant bit in HResults, and the two most significant bits in NTStatus are set on error. Hence Hresults start 8 on error and NTStatus starts C on Error. The next 14 or 15 bits are reserved and some specify the facility - what area the error is in. This is the third and fourth number when reading hex. EG 0xnn07nnnn - An HResult facility code 7 is a normal Windows' error (returned from a COM program - hence it's returned as a HResult). Facility codes are defined in Winerror.h for HResults and NTStatus.h for NTStatus codes. They are different.
To Decode 0x8003nnnn Errors
HResults with facility code 3 means the HResult contains OLE Structured Storage errors (0x0 to 0xff). These are the same as Dos error codes. These don't seem to be in Windows' header files and the list of codes is at the end of this post.
To Decode 0x8004nnnn Errors
HResults with facility code 4 means the HResult contains OLE errors (0x0 to 0x1ff) while the rest of the range (0x200 onwards) is component specific errors so 20e from one component will have a different meaning to 20e from another component.
This is why the source of the error is extra important for errors above 0x80040200.
To Decode 0x8007nnnn Errors
HResults with facility code 7 means the HResult contains a Windows' error code. You have to look up the Windows' error code not the HResult.
To decode 0x80070002. The 0x means it's a hexadecimal number, the 8 means error, the first 7 means it a windows error, and the rest of the number, 2, is the actual Windows error.
To look up the error we need it in decimal format. Start Calculator (Start - All Programs - Accessories - Calculator) and choose View menu - Scientific, then View menu - Hex. Enter 2. Then View menu - Decimal. It will say 2.
Start a Command Prompt (Start - All Programs - Accessories - Command Prompt) and type
net helpmsg 2
and it will say
The system cannot find the file specified.
or look it up in winerror.h
//
// MessageId: ERROR_FILE_NOT_FOUND
//
// MessageText:
//
// The system cannot find the file specified.
//
#define ERROR_FILE_NOT_FOUND 2L
To Decode 0x8019nnnn Errors
HResults with facility 0x19 are HTTP errors. Codes under 16,384 (0x4000) are the same as HTTP errors, eg HTTP status 404: The requested URL does not exist on the server is 0x80190194 (0x194 = 404). Codes 16,384 and higher are BITS specific.
To Decode 0xDnnnnnnn Errors
HResults starting 0xD are an HResult with a NTStatus value in it. Just change the lead D to a C and treat as an NTStatus (Hresult = NTStatus OR 0x10000000).
Dos Error Codes (for 0x8003nnnn errors)
Code Message
01 Invalid function number
02 File not found
03 Path not found
04 Too many open files (no handles left)
05 Access denied
06 Invalid handle
07 Memory control blocks destroyed
08 Insufficient memory
09 Invalid memory block address
0A Invalid environment
0B Invalid format
0C Invalid access mode (open mode is invalid)
0D Invalid data
0E Reserved
0F Invalid drive specified
10 Attempt to remove current directory
11 Not same device
12 No more files
13 Attempt to write on a write-protected diskette
14 Unknown unit
15 Drive not ready
16 Unknown command
17 CRC error
18 Bad request structure length
19 Seek error
1A Unknown media type
1B Sector not found
1C Printer out of paper
1D Write fault
1E Read fault
1F General failure
20 Sharing violation
21 Lock violation
22 Invalid disk change
23 FCB unavailable
24 Sharing buffer overflow
25 Reserved
26 Unable to complete file operation (DOS 4.x)
27-31 Reserved
32 Network request not supported
33 Remote computer not listening
34 Duplicate name on network
35 Network name not found
36 Network busy
37 Network device no longer exists
38 NetBIOS command limit exceeded
39 Network adapter error
3A Incorrect network response
3B Unexpected network error
3C Incompatible remote adapter
3D Print queue full
3E No space for print file
3F Print file deleted
40 Network name deleted
41 Access denied
42 Network device type incorrect
43 Network name not found
44 Network name limit exceeded
45 NetBIOS session limit exceeded
46 Temporarily paused
47 Network request not accepted
48 Print or disk redirection is paused
49-4F Reserved
50 File already exists
51 Reserved
52 Cannot make directory entry
53 Fail on INT 24
54 Too many redirections
55 Duplicate redirection
56 Invalid password
57 Invalid parameter
58 Network device fault
59 Function not supported by network (DOS 4.x)
5A Required system component not installed (DOS 4.x)
Facility Codes
NTStatus Facilities HResults Facilities
Common status values 0x0 Null 0x0
Debugger 0x1 Rpc 0x1
Rpc_runtime 0x2 Dispatch 0x2
Rpc_stubs 0x3 Storage 0x3
Io_error_code 0x4 Itf 0x4
Various drivers 0x5-0xf Win32 0x7
Ntwin32 0x7 Windows 0x8
Ntsspi 0x9 Sspi 0x9
Terminal_server 0xa Security 0x9
Faciltiy_mui_error_code 0xb Control 0xa
Usb_error_code 0x10 Cert 0xb
Hid_error_code 0x11 Internet 0xc
Firewire_error_code 0x12 Mediaserver 0xd
Cluster_error_code 0x13 Msmq 0xe
Acpi_error_code 0x14 Setupapi 0xf
Sxs_error_code 0x15 Scard 0x10
Transaction 0x19 Complus 0x11
Commonlog 0x1a Aaf 0x12
Video 0x1b Urt 0x13
Filter_manager 0x1c Acs 0x14
Monitor 0x1d Dplay 0x15
Graphics_kernel 0x1e Umi 0x16
Driver_framework 0x20 Sxs 0x17
Fve_error_code 0x21 Windows_ce 0x18
Fwp_error_code 0x22 Http 0x19
Ndis_error_code 0x23 Usermode_commonlog 0x1a
Hypervisor 0x35 Usermode_filter_manager 0x1f
Ipsec 0x36 Backgroundcopy 0x20
Maximum_value 0x37 Configuration 0x21
State_management 0x22
Metadirectory 0x23
Windowsupdate 0x24
Directoryservice 0x25
Graphics 0x26
Shell 0x27
Tpm_services 0x28
Tpm_software 0x29
Pla 0x30
Fve 0x31
Fwp 0x32
Winrm 0x33
Ndis 0x34
Usermode_hypervisor 0x35
Cmi 0x36
Windows_defender 0x50
I'm currently learning assembly with MSP430.
This simple code should trigger an interrupt for TimerA.
#include "msp430.h" ; #define controlled include file
RSEG CSTACK
RSEG CODE
Reset:
mov.w #WDTPW|WDTHOLD, &WDTCTL ; stop watchdog
mov.w #MC_0|TACLR, &TACTL; stop timer
mov.w #7D0h, &TACCR0; count to 2000
mov.w #CCIE ,&TACCTL0
mov.w #MC_1|TAIE|TASSEL_2, &TACTL; RESET timerA, start it and set clock to VCO
mov.b #BIT0, &P2DIR; output
mov.b #BIT0, &P2OUT;
Main:
mov.w #GIE, SR;
jmp Main;
INTER:
xor.b #BIT0, &P1OUT ; toggle LED
reti
RSEG RESET
DW Reset;
ORG 0xFFF2; address of interrupt
DW INTER
END
But get following error after trying to load code on my MSP:
Error[e104]: Failed to fit all segments into specified ranges. Problem
discovered in segment CODE. Unable to place 1 block(s) (0xfff4 byte(s) total)
in 0x7e0 byte(s) of memory.
The problem occurred while processing the segment placement command
"-P(CODE)CODE=F800-FFDF", where at the moment of placement the
available memory ranges were "CODE:f800-ffdf"
Error while running Linker
I am sure it is some noob error, but can you explain what it is?
I am building a cross-compile toolchain for the Stellaris LM3S8962 cortex-m3 chip. The test c++ application I have written will execute for some time then fault. The fault will occur when I try to access a memory-mapped hardware device. At the moment my working hypothesis is that I am missing some essential chip initialization in my startup sequence.
What I would like to understand is why would the execution in gdb get halted and the program counter be set to 0? I have the vector table at 0x0, but the first value is the stack pointer. Shouldn't I end up in one of the fault handlers I specify in the vector table?
(gdb)
187 UARTSend((unsigned char *)secret, 2);
(gdb) cont
Continuing.
lm3s.cpu -- clearing lockup after double fault
Program received signal SIGINT, Interrupt.
0x00000000 in g_pfnVectors ()
(gdb) info registers
r0 0x1 1
r1 0x32 50
r2 0xffffffff 4294967295
r3 0x0 0
r4 0x74518808 1951500296
r5 0xc24c0551 3259762001
r6 0x42052dac 1107635628
r7 0x20007230 536900144
r8 0xf85444a9 4166272169
r9 0xc450591b 3293600027
r10 0xd8812546 3632342342
r11 0xb8420815 3091335189
r12 0x3 3
sp 0x200071f0 0x200071f0
lr 0xfffffff1 4294967281
pc 0x1 0x1 <g_pfnVectors+1>
fps 0x0 0
cpsr 0x60000023 1610612771
The toolchain is based on gcc, gdb, openocd.
GDB happily gave you some clue:
clearing lockup after double fault
Your CPU was in locked state. That means it could not run its "Hard Fault" Interrupt Handler (maybe there is a 0 in its Vector).
I usually get these when I forgot to "power" the periperial, the resulting Bus Error escalates first to "Hard Fault" and then to locked state. Should be mentioned in the manual of your MCU, btw.