I created the Hello World program using the VC5510.cmd link file from CC5 (combined DRAM1, 2 $ 3 so that the ".text" code will fit in the memory. Below is the partially VC5510.cmd file.
MEMORY
{
MMR: o = 0x000000 l = 0x0000c0 /* 192B Memory Mapped Registers */
DARAM0: o = 0x0000C0 l = 0x001F40 /* 8kB Dual Access RAM 0 */
DARAM1: o = 0x002000 l = 0x006000 /* 8kB Dual Access RAM 1 */
// DARAM2: o = 0x004000 l = 0x002000 /* 8kB Dual Access RAM 2 */
// DARAM3: o = 0x006000 l = 0x002000 /* 8kB Dual Access RAM 3 */
SECTIONS
{
vectors > DARAM1 /* If MPNMC = 1, remove the NOLOAD directive */
.cinit > DARAM0
.text > DARAM1
.stack > DARAM0
.sysstack > DARAM0
.sysmem > DARAM4
.data > DARAM4
.cio > DARAM0
.bss > DARAM5
.const > DARAM0
}
The program built correctly and I checked the .map file and all the codes located to the correctly memory regions. When I ran the program and after the "Hello World!" message was displayed, somehow the program jumped to some no code memory location (0x7f4865).
I traced through the assembly codes and found:
After the message was printed, the program jumped to location 005151. It looped from 005151 to 005153 2 times and when RET was executed, program jumped to 7f4865. I couldn't figure out what's wrong!
_eqld:
005125: 1a0020 OR #0,AC0,AC2
005128: 1a0001 OR #0,AC1,AC0
00512b: 1a0012 OR #0,AC2,AC1
00512e: 2c01 XOR AC0,AC1
005130: 65d1 BCC #0x00513d,AC1 >= #0
005132: 7a80000a_2b02 MOV #-32768 << #16,AC0 || OR AC0,AC2
005138: 122c04 CMPU AC2 != AC0, TC1
00513b: 4a14 B #0x005151
00513d: 122000 CMP AC2 == AC0, TC1
005140: 3c04_9ef4 XCCPART !TC1 || MOV #0,T0
005144: 047410 BCC #0x005157,!TC1
005147: 7a7f800a MOV #32640 << #16,AC0
00514b: ec3e22 BCLR *SP(#1fh),AC2
00514e: 120424 CMPU AC0 < AC2, TC1
005151: 3c04 MOV #0,T0
005153: 3c14_9ef4 XCCPART !TC1 || MOV #1,T0
005157: 4804 RET
7f4861: ff .byte 0xff
7f4862: 003000 RPTCC #0, AC0 <= #0
7f4865: 000000 RPTCC #0, AC0 == #0
7f4868: 002200 RPTCC #0, AC2 < #0
7f486b: 000020 RPTCC #32, AC0 == #0
7f486e: 000000 RPTCC #0, AC0 == #0
Partial Linker Map:
******************************************************************************
TMS320C55x Linker PC v4.4.1
******************************************************************************
>> Linked Thu Apr 16 11:39:07 2015
OUTPUT FILE NAME: <Hello.out>
ENTRY POINT SYMBOL: "_c_int00" address: 00005f3b
MEMORY CONFIGURATION
name origin length used unused attr fill
(bytes) (bytes) (bytes) (bytes)
---------------------- -------- --------- -------- -------- ---- --------
MMR 00000000 000000c0 00000000 000000c0 RWIX
DARAM0 000000c0 00001f40 000009c0 00001580 RWIX
DARAM1 00002000 00006000 00004170 00001e90 RWIX
DARAM4 00008000 00002000 00000400 00001c00 RWIX
DARAM5 0000a000 00002000 000004d4 00001b2c RWIX
DARAM6 0000c000 00002000 00000000 00002000 RWIX
.text 0 00002000 [ 00001000 ] 00004070 *
00002000 [ 00001000 ] 000015a4 * rts55x.lib : _printfi.obj (.text)
000035a4 [ 00001ad2 ] 00000543 * : lowlev.obj (.text)
00003ae7 [ 00001d73+] 00000528 * : trgdrv.obj (.text)
0000400f [ 00002007+] 000004b5 * : memory.obj (.text)
000044c4 [ 00002262 ] 000003cc * : divd.obj (.text)
00004890 [ 00002448 ] 0000027f * : fopen.obj (.text)
00004b0f [ 00002587+] 0000025e * : llmpy.obj (.text)
00004d6d [ 000026b6+] 0000025a * : addd.obj (.text)
00004fc7 [ 000027e3+] 000001ea * : cmpd.obj (.text)
000051b1 [ 000028d8+] 00000163 * : fputs.obj (.text)
00005314 [ 0000298a ] 0000014c * : mpyd.obj (.text)
00005460 [ 00002a30 ] 000000e6 * : setvbuf.obj (.text)
00005546 [ 00002aa3 ] 000000dd * : _io_perm.obj (.text)
00005623 [ 00002b11+] 000000c2 * : fflush.obj (.text)
000056e5 [ 00002b72+] 000000ba * : trgmsg.obj (.text:CIO_breakpoint)
0000579f [ 00002bcf+] 000000a6 * : fputc.obj (.text)
00005845 [ 00002c22+] 000000a1 * : divul.obj (.text)
000058e6 [ 00002c73 ] 0000007d * : ltoa.obj (.text)
00005963 [ 00002cb1+] 0000007b * : fclose.obj (.text)
000059de [ 00002cef ] 00000076 * : frcmpyd.obj (.text)
00005a54 [ 00002d2a ] 00000073 * : frcmpyd_div.obj (.text)
00005ac7 [ 00002d63+] 00000072 * : remul.obj (.text)
00005b39 [ 00002d9c+] 0000006f * : fixdli.obj (.text)
00005ba8 [ 00002dd4 ] 0000006d * : trgmsg.obj (.text)
00005c15 [ 00002e0a+] 0000006b * : fseek.obj (.text)
00005c80 [ 00002e40 ] 00000067 * : fltlid.obj (.text)
00005ce7 [ 00002e73+] 0000005c * : atoi.obj (.text)
00005d43 [ 00002ea1+] 00000050 * : printf.obj (.text)
00005d93 [ 00002ec9+] 0000004d * : autoinit.obj (.text)
00005de0 [ 00002ef0 ] 0000004b * : args_main.obj (.text)
00005e2b [ 00002f15+] 0000004b * : remli.obj (.text)
00005e76 [ 00002f3b ] 00000048 * : divli.obj (.text)
00005ebe [ 00002f5f ] 0000003f * : memcpy.obj (.text)
00005efd [ 00002f7e+] 0000003e * : exit.obj (.text)
00005f3b [ 00002f9d+] 00000034 * : boot.obj (.text)
00005f6f [ 00002fb7+] 0000002a * : fixdi.obj (.text)
00005f99 [ 00002fcc+] 0000002a * : udiv.obj (.text)
00005fc3 [ 00002fe1+] 00000023 * : memccpy.obj (.text)
00005fe6 [ 00002ff3 ] 0000001a * : isinf.obj (.text)
00006000 [ 00003000 ] 00000014 * : subd.obj (.text)
00006014 [ 0000300a ] 00000013 * hello.obj (.text)
00006027 [ 00003013+] 00000013 * rts55x.lib : lmpy.obj (.text)
0000603a [ 0000301d ] 00000012 * : _lock.obj (.text)
0000604c [ 00003026 ] 00000010 * : negd.obj (.text)
0000605c [ 0000302e ] 0000000a * : remove.obj (.text)
00006066 [ 00003033 ] 00000007 * : exit.obj (.text:CIO_breakpoint)
0000606d [ 00003036+] 00000002 * : vectors.obj (.text)
0000606f [ 00003037 ] 00000001 * --HOLE-- [fill = 20]
