readme_recoverexcsigdemo

官方源码

FILE LIST -
	    recoverExcSigDemo.c


DESCRIPTION -
	    tServer task executes functions at low priority (254). serverSend
	    funtion is used to send a request to the tServer to execute a
	    function at the tServer's  priority.

	    First tServer task executes the i() system call to print the summary
	    of tShell task. Next an address exception is caused in tServer
	    task by trying to execute a funtion at non-aligned word boundry.
	    As a result SIGBUS signal is  raised  automatically. Signals
	    (setjmp() and longjmp()) are used to allow the tServer task to
	    recover gracefully from an address error exception. For more
	    information about signals, please refer to sigLib manual pages.

RUNNING DEMO -
	    Place the recoverExcSigDemo.c file in your <Tornado> dir. Depending
	    on the target you have, define the CPU in your compile line and
	    use the Make in the BSP dir. to compile.

	    Include #define INCLUDE_SHELL in the config.h file

	    To run this code invoke the function recoverExcDemo()

CAVEAT    - This code fails on a mv1604 board.

TESTED ON - Host/Target : Solaris 2.5.1 / mv177
	    VxWorks     : 5.3.1

EXAMPLE COMPILE LINE -
	    make CPU=68k recoverExcSigDemo.o

%make CPU=68k recoverExcSigDemo.o

cc68k -B/petaluma1/mayur/tor101/host/sun4-solaris2/lib/gcc-lib/ -m68040 -ansi 
-nostdinc -O2 -fvolatile -fno-builtin -Wall -I/h   -I. 
-I/petaluma1/mayur/tor101/target/config/all 
-I/petaluma1/mayur/tor101/target/h -I/petaluma1/mayur/tor101/target/src/config 
-I/petaluma1/mayur/tor101/target/src/drv -DCPU=MC68060     
-c recoverExcSigDemo.c

OUTPUTS/LOGFILE -

On VxWorks target:
==================

-> ld <recoverExcSigDemo.o
value = 688064 = 0xa7fc0
-> sp (recoverExcDemo)
task spawned: id = 1f90b3c, name = u0
value = 33098556 = 0x1f90b3c

Exception number 3: Task: 0x1fff3d0 (tServer)

Address Error
Status Register     : 0x27
2efe2    _vxTaskEntry   +10 : _sigHandler (0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
27a4c6   _sigHandler    +208: _read (11, 1fff38c, 8)
1d450    _read          +10 : _iosRead ([11, 1fff38c, 8, 1fff3a0, 27a4cc, 11])
2460a    _iosRead       +72 : _pipeDevCreate ([1fffe98, 1fff38c, 8, 1fff370, 1d4
56, 11])
2cd22    _pipeDevCreate +ee : _msgQReceive ([1fffea6, 1fff38c, 8, ffffffff, 0, &
_taskIdSelf])
78d2     _msgQReceive   +b6 : _qJobGet ([1fffeaa, ffffffff, 0, 0, 0, 1fffe98])

The Output on Console:
======================
Starting the tServer task

Running tServer task without causing an exception

Task not found.


Causing an address error exception in tServer task


Signal SIGBUS (bus error) received from tServer task (0x1fff3d0)


TESTED ON -  Host/Target : Solaris 2.5.1 / mv2603
	     VxWorks     : 5.3.1

EXAMPLE COMPILE LINE - 
	     make CPU=PPC603 recoverExcSigDemo.o

%make CPU=PPC603 recoverExcSigDemo.o
ccppc -B/petaluma1/mayur/tor101/host/sun4-solaris2/lib/gcc-lib/ 
-mstrict-align -ansi -nostdinc -O2 -fvolatile -fno-builtin -fno-for-scope  
-Wall -I/h   -I. -I/petaluma1/mayur/tor101/target/config/all 
-I/petaluma1/mayur/tor101/target/h -I/petaluma1/mayur/tor101/target/src/config 
-I/petaluma1/mayur/tor101/target/src/drv -DCPU=PPC603  
-DMV2600 -DTARGET_DIR="\"mv2603\""   -c recoverExcSigDemo.c

OUTPUTS/LOGFILE -

On VxWorks target:
==================

-> ld <recoverExcSigDemo.o
value = 664232 = 0xa22a8
-> sp (recoverExcDemo)
task spawned: id = be7d28, name = u1
value = 12483880 = 0xbe7d28

Exception number 1792: Task: 0xffefa0 (tServer) 


"Floating point invalid operation for INF * 0"
"Floating point invalid operation for invalid compare"
program counter:  0xffef20
machine status:   0xffef00
FP status & ctrl: 0x1a0000
16c140   vxTaskEntry    +60 : 28fae8 ([])
28fba0   sigHandler     +238: read ([])
13867c   read           +10 : iosRead ([])
139b18   iosRead        +d0 : 13c5c0 ([])
13c5e4   pipeDevCreate  +15c: msgQReceive ([])
15c958   msgQReceive    +128: qJobGet ([])

The Output on Console:
======================
Starting the tServer task

Running tServer task without causing an exception

Show routine of this object not configured into system.


Causing an address error exception in tServer task


Signal 4 received from tServer task (0xffefa0)


TESTED ON -  Host/Target : Solaris 2.5.1 / mv1603
             VxWorks     : 5.3.1

EXAMPLE COMPILE LINE -
	     make CPU=PPC603 recoverExcSigDemo.o

%make CPU=PPC603 recoverExcSigDemo.o
ccppc -B/petaluma1/mayur/tor101/host/sun4-solaris2/lib/gcc-lib/ 
-mstrict-align -ansi -nostdinc -O2 -fvolatile -fno-builtin -fno-for-scope  
-Wall -I/h   -I. -I/petaluma1/mayur/tor101/target/config/all 
-I/petaluma1/mayur/tor101/target/h -I/petaluma1/mayur/tor101/target/src/config 
-I/petaluma1/mayur/tor101/target/src/drv -DCPU=PPC603  
-DMV1600 -DTARGET_DIR="\"mv1603\""   -c recoverExcSigDemo.c

OUTPUTS/LOGFILE -

On VxWorks target:
==================
-> ld <recoverExcSigDemo.o
value = 664800 = 0xa24e0 = hashTblFind + 0xd0
-> sp (recoverExcDemo)
task spawned: id = 5cc8d8, name = u1
value = 6080728 = 0x5cc8d8
-> 
Exception number 1792: Task: 0x7fefa0 (tServer) 


"Floating point invalid operation for software request"
"Floating point invalid operation for square root"
"Floating point invalid operation for interger convert"
program counter:  0x7fef20
machine status:   0x7fef00
FP status & ctrl: 0x78788
825ac    vxTaskEntry    +60 : 130880 ([])
130938   sigHandler     +238: read ([])
5da14    read           +10 : iosRead ([])
5eeb0    iosRead        +d0 : 61958 ([])
6197c    pipeDevCreate  +15c: msgQReceive ([])
7789c    msgQReceive    +128: qJobGet ([])

The Output on Console:
======================
Starting the tServer task

Running tServer task without causing an exception

Show routine of this object not configured into system.


Causing an address error exception in tServer task


Signal 4 received from tServer task (0x7fefa0)