Using instruction set simulator on hello_world_small
works:
/cygdrive/c/altera/myNios/software/hello_world_small_0
[SOPC Builder]$ nios2-iss -f hello_world_small.elf -p ../../system.ptf
Altera Nios II ISS Software Simulation Environment Version 5.0
Copyright (C) 2005 Altera Corporation
Info : Successfully read SOPC Builder PTF file '../../system.ptf'
Info : Configuring 'system' model
Info : PTF Setting jtag_uart_0/SYSTEM_BUILDER_INFO/Iss_Launch_Telnet="0" detecte
d
Info : 'jtag_uart_0' character stream will be displayed in this window
Info : The host communication device for stdin is jtag_uart_0
Info : The host communication device for stdout is jtag_uart_0
Info : The host communication device for stderr is jtag_uart_0
Info : Running 'system' model
Hello from Nios II!
Info : Component cpu_0's program has terminated
Info : Instructions executed = 836
Info : cpu_0 simulation return code 0
Info : Exiting system model with return code 0 (0 fatal errors, 0 errors, 0 warnings)
/cygdrive/c/altera/myNios/software/hello_world_small_0
[SOPC Builder]$
It does not work with bitrun, but the a.out file
is relocatable not exec.
/cygdrive/c/altera/myNios/software
Usage: readelf elf-file(s)
Display information about the contents of ELF format files
Options are:
-a --all Equivalent to: -h -l -S -s -r -d -V -A -I
-h --file-header Display the ELF file header
-l --program-headers Display the program headers
--segments An alias for --program-headers
-S --section-headers Display the sections' header
--sections An alias for --section-headers
-e --headers Equivalent to: -h -l -S
-s --syms Display the symbol table
--symbols An alias for --syms
-n --notes Display the core notes (if present)
-r --relocs Display the relocations (if present)
-u --unwind Display the unwind info (if present)
-d --dynamic Display the dynamic segment (if present)
-V --version-info Display the version sections (if present)
-A --arch-specific Display architecture specific information (if any).
-D --use-dynamic Use the dynamic section info when displaying symbols
-x --hex-dump= Dump the contents of section
-w[liaprmfFso] or
--debug-dump[=line,=info,=abbrev,=pubnames,=ranges,=macro,=frames,=str,=loc]
Display the contents of DWARF2 debug sections
-I --histogram Display histogram of bucket list lengths
-W --wide Allow output width to exceed 80 characters
-H --help Display this information
-v --version Display the version number of readelf
Report bugs to bug-binutils@gnu.org
/cygdrive/c/altera/myNios/software
[SOPC Builder]$ nios2-elf-readelf -h a.out
ELF Header:
Magic: 7f 45 4c 46 01 01 01 ff 00 00 00 00 00 00 00 00
Class: ELF32
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: Standalone App
ABI Version: 0
Type: REL (Relocatable file)
Machine: Altera Nios II
Version: 0x1
Entry point address: 0x0
Start of program headers: 0 (bytes into file)
Start of section headers: 136 (bytes into file)
Flags: 0x0
Size of this header: 52 (bytes)
Size of program headers: 0 (bytes)
Number of program headers: 0
Size of section headers: 40 (bytes)
Number of section headers: 7
Section header string table index: 4
/cygdrive/c/altera/myNios/software
[SOPC Builder]$
/cygdrive/c/altera/myNios/software/hello_world_small_0
[SOPC Builder]$ nios2-elf-readelf -h hello_world_small.elf
ELF Header:
Magic: 7f 45 4c 46 01 01 01 ff 00 00 00 00 00 00 00 00
Class: ELF32
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: Standalone App
ABI Version: 0
Type: EXEC (Executable file)
Machine: Altera Nios II
Version: 0x1
Entry point address: 0x1000
Start of program headers: 52 (bytes into file)
Start of section headers: 109172 (bytes into file)
Flags: 0x0
Size of this header: 52 (bytes)
Size of program headers: 32 (bytes)
Number of program headers: 2
Size of section headers: 40 (bytes)
Number of section headers: 24
Section header string table index: 21
/cygdrive/c/altera/myNios/software/hello_world_small_0
[SOPC Builder]$
/cygdrive/c/altera/myNios/software
[SOPC Builder]$ nios2-iss -ta:simulation.txt -e0x30 -f a.out -p ../system.ptf
Altera Nios II ISS Software Simulation Environment Version 5.0
Copyright (C) 2005 Altera Corporation
Info : Successfully read SOPC Builder PTF file '../system.ptf'
Info : Configuring 'system' model
Info : PTF Setting jtag_uart_0/SYSTEM_BUILDER_INFO/Iss_Launch_Telnet="0" detecte
d
Info : 'jtag_uart_0' character stream will be displayed in this window
Info : The host communication device for stdin is jtag_uart_0
Info : The host communication device for stdout is jtag_uart_0
Info : The host communication device for stderr is jtag_uart_0
Info : Running 'system' model
Info : Component cpu_0's program has terminated
Info : Instructions executed = 27
Info : cpu_0 simulation return code 4
Info : Exiting system model with return code 4 (0 fatal errors, 0 errors, 0 warn
ings)
/cygdrive/c/altera/myNios/software
[SOPC Builder]$ nios2-iss -ta -e0x30 -f a.out -p ../system.ptf
I devised the following shell script:
#!/bin/sh
echo "compile bitrun"
nios2-elf-gcc bitrun.s
echo "show ELF header (note location of main)"
nios2-elf-readelf -hs a.out
echo "run with instruction set simulator (starting from main)"
nios2-iss -ta:simulation.txt -e0x30 -f a.out -p ../system.ptf
Which gives the following results:
/cygdrive/c/altera/myNios/software
[SOPC Builder]$ test.sh
compile bitrun
show ELF header (note location of main)
ELF Header:
Magic: 7f 45 4c 46 01 01 01 ff 00 00 00 00 00 00 00 00
Class: ELF32
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: Standalone App
ABI Version: 0
Type: EXEC (Executable file)
Machine: Altera Nios II
Version: 0x1
Entry point address: 0x0
Start of program headers: 52 (bytes into file)
Start of section headers: 12912 (bytes into file)
Flags: 0x0
Size of this header: 52 (bytes)
Size of program headers: 32 (bytes)
Number of program headers: 2
Size of section headers: 40 (bytes)
Number of section headers: 18
Section header string table index: 15
Symbol table '.symtab' contains 48 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 00000000 0 SECTION LOCAL DEFAULT 1
2: 0000025c 0 SECTION LOCAL DEFAULT 2
3: 00000260 0 SECTION LOCAL DEFAULT 3
4: 000005dc 0 SECTION LOCAL DEFAULT 4
5: 000005e0 0 SECTION LOCAL DEFAULT 5
6: 000005e0 0 SECTION LOCAL DEFAULT 6
7: 00000000 0 SECTION LOCAL DEFAULT 7
8: 00000000 0 SECTION LOCAL DEFAULT 8
9: 00000000 0 SECTION LOCAL DEFAULT 9
10: 00000000 0 SECTION LOCAL DEFAULT 10
11: 00000000 0 SECTION LOCAL DEFAULT 11
12: 00000000 0 SECTION LOCAL DEFAULT 12
13: 00000000 0 SECTION LOCAL DEFAULT 13
14: 00000000 0 SECTION LOCAL DEFAULT 14
15: 00000000 0 SECTION LOCAL DEFAULT 15
16: 00000000 0 SECTION LOCAL DEFAULT 16
17: 00000000 0 SECTION LOCAL DEFAULT 17
18: 00000001 0 NOTYPE LOCAL DEFAULT ABS _nios2_macros_
19: 90abcd3f 0 NOTYPE LOCAL DEFAULT ABS TEST_NUM
20: 0000003c 0 NOTYPE LOCAL DEFAULT 1 string_counter
21: 00000040 0 NOTYPE LOCAL DEFAULT 1 string_counter_loop
22: 00000054 0 NOTYPE LOCAL DEFAULT 1 end_string_counter
23: 00000058 0 NOTYPE LOCAL DEFAULT 1 end
24: 00000000 0 FILE LOCAL DEFAULT ABS nosys_crt0.c
25: 00000000 0 FILE LOCAL DEFAULT ABS _zero_bss.c
26: 00000000 0 FILE LOCAL DEFAULT ABS exit.c
27: 00000000 0 FILE LOCAL DEFAULT ABS impure.c
28: 00000260 892 OBJECT LOCAL DEFAULT 3 impure_data
29: 00000000 0 FILE LOCAL DEFAULT ABS memset.c
30: 00000000 0 FILE LOCAL DEFAULT ABS nosys_exit.c
31: 0000005c 4 FUNC GLOBAL DEFAULT 1 __fake_init
32: 000085d0 0 NOTYPE GLOBAL DEFAULT ABS _gp
33: 00000060 64 FUNC GLOBAL DEFAULT 1 __start_2
34: 000000a0 12 FUNC GLOBAL DEFAULT 1 _zero_bss
35: 0000005c 4 FUNC WEAK DEFAULT 1 _init
36: 00000000 0 FUNC GLOBAL DEFAULT 1 _start
37: 0000022c 4 FUNC GLOBAL DEFAULT 1 __fake_fini
38: 000005e0 0 NOTYPE GLOBAL DEFAULT ABS __bss_start
39: 00000190 156 FUNC GLOBAL DEFAULT 1 memset
40: 00000030 0 FUNC GLOBAL DEFAULT 1 main
41: 0000022c 4 FUNC WEAK DEFAULT 1 _fini
42: 000005dc 4 OBJECT GLOBAL DEFAULT 4 _impure_ptr
43: 07ffff00 0 NOTYPE GLOBAL DEFAULT ABS nasys_stack_top
44: 000005e0 0 NOTYPE GLOBAL DEFAULT ABS _edata
45: 000005e0 0 NOTYPE GLOBAL DEFAULT ABS _end
46: 000000ac 228 FUNC GLOBAL DEFAULT 1 exit
47: 00000230 44 FUNC GLOBAL DEFAULT 1 _exit
run with instruction set simulator (starting from main)
Altera Nios II ISS Software Simulation Environment Version 5.0
Copyright (C) 2005 Altera Corporation
Info : Successfully read SOPC Builder PTF file '../system.ptf'
Info : Configuring 'system' model
Info : PTF Setting jtag_uart_0/SYSTEM_BUILDER_INFO/Iss_Launch_Telnet="0" detecte
d
Info : 'jtag_uart_0' character stream will be displayed in this window
Info : The host communication device for stdin is jtag_uart_0
Info : The host communication device for stdout is jtag_uart_0
Info : The host communication device for stderr is jtag_uart_0
Info : Running 'system' model
Info : Component cpu_0's program has terminated
Info : Instructions executed = 37
Info : cpu_0 simulation return code 6
Info : Exiting system model with return code 6 (0 fatal errors, 0 errors, 0 warn
ings)
/cygdrive/c/altera/myNios/software
[SOPC Builder]$