MuForce and MuGA hit when using NOSTARTUP in SAS/C, Why?

hceline · 12 August 2024, 10:31

I was trying to convert some small very simple test programs to compile without startup-code and started encountering some strange errors.
So I made a copy of "sc:examples/nostartup/Example_2" and compiled it, and ran it like "hello >ser:" I got no errors.

But if I change it from:

Code:

#include <string.h>
#include <proto/dos.h>
#include <proto/exec.h>

#define MSG "Hello, World!\n"

void hello(void)
{
   struct DosLibrary *DOSBase = 
                      (struct DosLibrary *)OpenLibrary("dos.library", 0L);

   Write(Output(), MSG, strlen(MSG));

   CloseLibrary((struct Library *)DOSBase);

to:

Code:

#include <string.h>
#include <proto/dos.h>
#include <proto/exec.h>

#define MSG "Hello, World!\n"

struct DosLibrary *DOSBase;

void hello(void)
{
   DOSBase = (struct DosLibrary *)OpenLibrary("dos.library", 0L);

   Write(Output(), MSG, strlen(MSG));

   CloseLibrary((struct Library *)DOSBase);
}

And run "hello >ser:" I get these hits:

Code:

Hello, World!
*MuForce Hit
LONG READ from 00A1A0E0                        PC: 080BED5A
USP : 08074EE4 SR: 0000  (U0)(-)(-)  TCB: 08074018
Data: 00A1A0E4 00A1A0E4 08011310 08074ECC 00000001 022854CB 00000001 080750F8
Addr: 08036D48 00A1A0E0 08011458 08074074 08A2B3F0 00F9574C 08000884 080022A4
Stck: 00F9600A 00000000 00000000 00001000 08077740 00000001 022854CB 00000001
Stck: 0228A3C9 08077741 08A28F25 08A28F24 0800DC1C 08075158 08074062 08074F6C
Stck: 00F97EF4 0000000C 00001000 08077740 00000001 022874E7 0201D83F 02003707
Stck: 08073F3D 08074018 08074FE4 08011310 0000000C 02003707 08A1C7C4 022874E7
Stck: 00001000 08077740 00000001 08075108 00000000 08074000 00FCAA7E 00001000
Stck: 00000000 00000000 00000010 00000000 022874E7 00000000 08073FAC 00000000
Stck: 08074018 08074FF8 0000000A 08070D44 00000000 022874E7 0807517C 00FCA4D2
Stck: 00000004 FFFFFFFF 00000001 FFFFFFFF 08063EBC 08074018 08011310 022874E7
Stck: 00000000 022871F1 00000000 00000000 00000000 00010001 00000000 0000000A
Stck: 00000000 00000000 00FC91B6 00000000 00000000 00000000 00F95B76 08073F3C
Stck: 08063EBC 08011310 00FC8AA8 003F4A8F FFFFFFFE 00000027 003F4A8F 0000009C
Stck: 00F95B76 00000000 00000000 00000000 08000884 00000027 00F9CC18 08000884
Stck: 00F97DE0 0000009C 00F95B76 00000000 00FC85E8 08011310 00F95E1C 00FCAF10
Stck: 003F4A8F FFFFFFFE 00000000 00000000 08011310 00FC8250 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 08074018 00000000 08063EBC 08075158 08074018 00000F84 00000000 00000001
Stck: 00FC7E92 00000000 00FC7DE8 08074018 00F959F8 00001000 496E6974 69616C20
Stck: 434C4900 08074000 08074062 00000000 00000001 08075120 00000014 00000002
Stck: 003E5535 003E7434 00000000 003F1F79 00000000 08076D90 00000020 08075144
Stck: 08075148 0807514C 08075150 08075154 08075158 00000000 00000000 00000000
Stck: 00000000 00000000 08077628 00000006 08077640 00000100 08077740 00000100
Stck: 00000000 00000000 00000000 00000000 08076A90 08076B90 0000000C 08076BB0
Stck: 0000000B 08076BA0 0000000B 08000884 08011310 08005068 00000000 00000049
Stck: FFFFFFFD 68656C6C 6F000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 FFFFFFFD 0000008C 00000001
Stck: 00004281 0000024D 00000930 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 003F4AC5 003F4A8F 003F4A9D 003F4ABB 003F4AC7 00000000 00000000 00000000
Stck: 00000000 00000000 08076C40 0000000C 0000000C 08076C40 00000100 08076990
Stck: 000000DE 00000000 00000000 00000000 00000000 00000F84 00000000 080760E0
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00004000
Stck: 00000000 43000100 0000002C 00000002 4E6F7374 61727475 70000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000002 00001000 00000008 00004281 0000024D 00000930 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 436F6465 3A432D43 6F64652F 4E6F7374 61727475
Stck: 702F006E 666F0074 2F006E66 6F000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 434F4E00 08A0A6FC 08073D50 08077958 080778B8
Stck: 080778B8 08076C4E 00030000 08077966 080778B8 00000015 00000001 08A199C8
Stck: 00000038 080778B8 00000024 00000000 00000000 080755BC 00000000 080755B8
Stck: 08A19870 00000000 08A19918 00000000 00000002 02003707 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
----> 080BED5A - "SYS:System/MuTools/MuGuardianAngel"  Hunk 0000 Offset 00001FCA
----> 00F9600A - "ROM - dos 47.30 (2.12.2021)"  Hunk 0000 Offset 00000B02
----> 00F97EF4 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0000 Offset 000029EC
----> 00FCAA7E - "ROM - shell 47.48 (29.9.2021)"  Hunk 0000 Offset 00002C72
----> 00FCA4D2 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0000 Offset 000026C6
----> 00FC91B6 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0000 Offset 000013AA
----> 00F95B76 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0000 Offset 0000066E
----> 00FC8AA8 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0000 Offset 00000C9C
----> 00F95B76 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0000 Offset 0000066E
----> 00F9CC18 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0000 Offset 00007710
----> 00F97DE0 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0000 Offset 000028D8
----> 00F95B76 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0000 Offset 0000066E
----> 00FC85E8 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0000 Offset 000007DC
----> 00F95E1C - "ROM - dos 47.30 (2.12.2021)"  Hunk 0000 Offset 00000914
----> 00FCAF10 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0000 Offset 00003104
----> 00FC8250 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0000 Offset 00000444
----> 00FC7E92 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0000 Offset 00000086
----> 00FC7DE8 - "ROM - gameport 47.1 (4.8.2019)"  Hunk 0000 Offset 00000A38
----> 00F959F8 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0000 Offset 000004F0
PC-8: 0DDC588F 70004E75 48E7FFFC 601A2009 660E203C ABADF00D 22002040 22404E75
PC *: 202148E7 FFFC7200 41EF0038 4BF9080C 11482848 28012400 47ED0070 2449BFEE
080becda :  6100 0e3a                  bsr $80bfb16
080becde :  6028                       bra.s $80bed08
080bece0 :  2203                       move.l d3,d1
080bece2 :  203c 7fff fff0             move.l #$7ffffff0,d0
080bece8 :  6100 f894                  bsr $80be57e
080becec :  601a                       bra.s $80bed08
080becee :  4a2d 0114                  tst.b $114(a5)
080becf2 :  6714                       beq.s $80bed08
080becf4 :  91c8                       suba.l a0,a0
080becf6 :  203c 080c 0c57             move.l #$80c0c57,d0
080becfc :  224c                       movea.l a4,a1
080becfe :  7201                       moveq.l #$1,d1
080bed00 :  2f06                       move.l d6,-(a7)
080bed02 :  6100 0e12                  bsr $80bfb16
080bed06 :  588f                       addq.l #$4,a7
080bed08 :  242e 0114                  move.l $114(a6),d2
080bed0c :  6712                       beq.s $80bed20
080bed0e :  2042                       movea.l d2,a0
080bed10 :  0c28 000d 0008             cmpi.b #$d,$8(a0)
080bed16 :  6606                       bne.s $80bed1e
080bed18 :  7267                       moveq.l #$67,d1
080bed1a :  2141 0094                  move.l d1,$94(a0)
080bed1e :  7400                       moveq.l #$0,d2
080bed20 :  6100 0c42                  bsr $80bf964
080bed24 :  2002                       move.l d2,d0
080bed26 :  4e75                       rts
080bed28 :  203c 080c 0e09             move.l #$80c0e09,d0
080bed2e :  224c                       movea.l a4,a1
080bed30 :  7200                       moveq.l #$0,d1
080bed32 :  4879 080c 09f8             pea.l $80c09f8
080bed38 :  6100 0ddc                  bsr $80bfb16
080bed3c :  588f                       addq.l #$4,a7
080bed3e :  7000                       moveq.l #$0,d0
080bed40 :  4e75                       rts
080bed42 :  48e7 fffc                  movem.l d0-a5,-(a7)
080bed46 :  601a                       bra.s $80bed62
080bed48 :  2009                       move.l a1,d0
080bed4a :  660e                       bne.s $80bed5a
080bed4c :  203c abad f00d             move.l #-$54520ff3,d0
080bed52 :  2200                       move.l d0,d1
080bed54 :  2040                       movea.l d0,a0
080bed56 :  2240                       movea.l d0,a1
080bed58 :  4e75                       rts
080bed5a : *2021                       move.l -(a1),d0
080bed5c :  48e7 fffc                  movem.l d0-a5,-(a7)
080bed60 :  7200                       moveq.l #$0,d1
080bed62 :  41ef 0038                  lea.l $38(a7),a0
080bed66 :  4bf9 080c 1148             lea.l $80c1148,a5
080bed6c :  2848                       movea.l a0,a4
080bed6e :  2801                       move.l d1,d4
080bed70 :  2400                       move.l d0,d2
080bed72 :  47ed 0070                  lea.l $70(a5),a3
080bed76 :  2449                       movea.l a1,a2
080bed78 :  bfee 003a                  cmpa.l $3a(a6),a7
080bed7c :  6508                       bcs.s $80bed86
080bed7e :  bfee 0036                  cmpa.l $36(a6),a7
080bed82 :  6500 01be                  bcs $80bef42
080bed86 :  6100 0b52                  bsr $80bf8da
080bed8a :  6100 f788                  bsr $80be514
080bed8e :  220a                       move.l a2,d1
080bed90 :  6700 0084                  beq $80bee16
080bed94 :  0201 0007                  andi.b #$7,d1
080bed98 :  6600 00a4                  bne $80bee3e
080bed9c :  4a82                       tst.l d2
080bed9e :  6700 008a                  beq $80bee2a
080beda2 :  220c                       move.l a4,d1
080beda4 :  6700 014a                  beq $80beef0
080beda8 :  2054                       movea.l (a4),a0
080bedaa :  b1ed 0018                  cmpa.l $18(a5),a0
080bedae :  6508                       bcs.s $80bedb8
080bedb0 :  b1ed 001c                  cmpa.l $1c(a5),a0
080bedb4 :  6300 013a                  bls $80beef0
080bedb8 :  2602                       move.l d2,d3
080bedba :  264a                       movea.l a2,a3
080bedbc :  202d 0044                  move.l $44(a5),d0
080bedc0 :  d4ad 00f8                  add.l $f8(a5),d2
080bedc4 :  d0ad 00f4                  add.l $f4(a5),d0
080bedc8 :  5e82                       addq.l #$7,d2
080bedca :  95c0                       suba.l d0,a2
080bedcc :  0202 00f8                  andi.b #-$8,d2
080bedd0 :  d480                       add.l d0,d2
080bedd2 :  204a                       movea.l a2,a0
080bedd4 :  6100 0ec0                  bsr $80bfc96
080bedd8 :  2c55                       movea.l (a5),a6
Name: "Initial CLI"  CLI: "hello"  SegList is invalid!!!

*MuGuardianAngel Hit
Null-sized FreeMem, ignored.
PC  : 00f9600a  USP: 08074ee8 ( )( )  Name: hello
----> 00f9600a - "ROM - dos 47.30 (2.12.2021)"  Hunk 0 Offset 00000b02
Data: 00000000 00a1a0e4 08011310 08074ecc 00000001 022854cb 00000001 080750f8
Addr: 08036d48 00a1a0e0 08011458 08074074 08a2b3f0 00f9574c SysBase  --------
Stck: 00000000 00000000 00001000 08077740 00000001 022854cb 00000001 0228a3c9
Stck: 08077741 08a28f25 08a28f24 0800dc1c 08075158 08074062 08074f6c 00f97ef4
Stck: 0000000c 00001000 08077740 00000001 022874e7 0201d83f 02003707 08073f3d
Stck: 08074018 08074fe4 08011310 0000000c 02003707 08a1c7c4 022874e7 00001000
Stck: 08077740 00000001 08075108 00000000 08074000 00fcaa7e 00001000 00000000
Stck: 00000000 00000010 00000000 022874e7 00000000 08073fac 00000000 08074018
Stck: 08074ff8 0000000a 08070d44 00000000 022874e7 0807517c 00fca4d2 00000004
Stck: ffffffff 00000001 ffffffff 08063ebc 08074018 08011310 022874e7 00000000
Stck: 022871f1 00000000 00000000 00000000 00010001 00000000 0000000a 00000000
Stck: 00000000 00fc91b6 00000000 00000000 00000000 00f95b76 08073f3c 08063ebc
Stck: 08011310 00fc8aa8 003f4a8f fffffffe 00000027 003f4a8f 0000009c 00f95b76
Stck: 00000000 00000000 00000000 08000884 00000027 00f9cc18 08000884 00f97de0
Stck: 0000009c 00f95b76 00000000 00fc85e8 08011310 00f95e1c 00fcaf10 003f4a8f
Stck: fffffffe 00000000 00000000 08011310 00fc8250 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 08074018
Stck: 00000000 08063ebc 08075158 08074018 00000f84 00000000 00000001 00fc7e92
Stck: 00000000 00fc7de8 08074018 00f959f8 00001000 496e6974 69616c20 434c4900
Stck: 08074000 08074062 00000000 00000001 08075120 00000014 00000002 003e5535
Stck: 003e7434 00000000 003f1f79 00000000 08076d90 00000020 08075144 08075148
Stck: 0807514c 08075150 08075154 08075158 00000000 00000000 00000000 00000000
Stck: 00000000 08077628 00000006 08077640 00000100 08077740 00000100 00000000
Stck: 00000000 00000000 00000000 08076a90 08076b90 0000000c 08076bb0 0000000b
Stck: 08076ba0 0000000b 08000884 08011310 08005068 00000000 00000049 fffffffd
Stck: 68656c6c 6f000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 fffffffd 0000008c 00000001 00004281
Stck: 0000024d 00000930 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Stck: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 003f4ac5
Stck: 003f4a8f 003f4a9d 003f4abb 003f4ac7 00000000 00000000 00000000 00000000
----> 00f97ef4 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0 Offset 000029ec
----> 00fcaa7e - "ROM - shell 47.48 (29.9.2021)"  Hunk 0 Offset 00002c72
----> 00fca4d2 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0 Offset 000026c6
----> 00fc91b6 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0 Offset 000013aa
----> 00f95b76 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0 Offset 0000066e
----> 00fc8aa8 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0 Offset 00000c9c
----> 00f95b76 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0 Offset 0000066e
----> 00f9cc18 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0 Offset 00007710
----> 00f97de0 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0 Offset 000028d8
----> 00f95b76 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0 Offset 0000066e
----> 00fc85e8 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0 Offset 000007dc
----> 00f95e1c - "ROM - dos 47.30 (2.12.2021)"  Hunk 0 Offset 00000914
----> 00fcaf10 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0 Offset 00003104
----> 00fc8250 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0 Offset 00000444
----> 00fc7e92 - "ROM - shell 47.48 (29.9.2021)"  Hunk 0 Offset 00000086
----> 00fc7de8 - "ROM - gameport 47.1 (4.8.2019)"  Hunk 0 Offset 00000a38
----> 00f959f8 - "ROM - dos 47.30 (2.12.2021)"  Hunk 0 Offset 000004f0
PC-8: 0010265f 275fffe2 275fffde 27470054 2f009282 59812241 2c780004 4eaefd4e
PC *: 201f275f 00704cdf 7ffc2200 4e7570ff 60f06100 fd122028 00545980 2e402001
00f95fea :  0010 265f                  ori.b #$5f,(a0)
00f95fee :  275f ffe2                  move.l (a7)+,-$1e(a3)
00f95ff2 :  275f ffde                  move.l (a7)+,-$22(a3)
00f95ff6 :  2747 0054                  move.l d7,$54(a3)
00f95ffa :  2f00                       move.l d0,-(a7)
00f95ffc :  9282                       sub.l d2,d1
00f95ffe :  5981                       subq.l #$4,d1
00f96000 :  2241                       movea.l d1,a1
00f96002 :  2c78 0004                  movea.l $4.w,a6
00f96006 :  4eae fd4e                  jsr -$2b2(a6)
00f9600a : *201f                       move.l (a7)+,d0
00f9600c :  275f 0070                  move.l (a7)+,$70(a3)
00f96010 :  4cdf 7ffc                  movem.l (a7)+,d2-a6
00f96014 :  2200                       move.l d0,d1
00f96016 :  4e75                       rts
00f96018 :  70ff                       moveq.l #-$1,d0
00f9601a :  60f0                       bra.s $f9600c
00f9601c :  6100 fd12                  bsr $f95d30
00f96020 :  2028 0054                  move.l $54(a0),d0
00f96024 :  5980                       subq.l #$4,d0
00f96026 :  2e40                       movea.l d0,a7
00f96028 :  2001                       move.l d1,d0

There is probably something very simple that I am missing, as I totally fail to understand why this would happen.

The compile options used are:

Code:

PARAMETERS=REGISTERS
NOSTACKCHECK
STRINGMERGE
OPTIMIZE
LINK
SMALLCODE
SMALLDATA
STRIPDEBUG
NOSTARTUP

Attaching a zipped version of the source dir including binary.
I tried compiling with DEBUG=FULL, but that did not change much in hit-output. Attaching that log.
Also the behavior is identical without console redirection to ser:.

What am I missing here?

-Hagbard Celine

bebbo · 12 August 2024, 10:51

Quote:

Originally Posted by hceline

I was trying to convert some small very simple test programs to compile without startup-code and started encountering some strange errors.
So I made a copy of "sc:examples/nostartup/Example_2" and compiled it, and ran it like "hello >ser:" I got no errors.

...

The compile options used are:

Code:

PARAMETERS=REGISTERS
NOSTACKCHECK
STRINGMERGE
OPTIMIZE
LINK
SMALLCODE
SMALLDATA
STRIPDEBUG
NOSTARTUP

Attaching a zipped version of the source dir including binary.
I tried compiling with DEBUG=FULL, but that did not change much in hit-output. Attaching that log.
Also the behavior is identical without console redirection to ser:.

What am I missing here?

-Hagbard Celine

You are using the smalldata model, where a4 is used, but not initialized.

hceline · 12 August 2024, 11:06

Ah thank you, I had a feeling it was something embarrassingly simple. Adding SAVEDS to compile options fixed it.
Going to crawl under the nearest rock now

.

-Hagbard Celine

12 August 2024, 11:06	#3
hceline Registered User Join Date: Nov 2009 Location: Top of the world Posts: 187	Ah thank you, I had a feeling it was something embarrassingly simple. Adding SAVEDS to compile options fixed it. Going to crawl under the nearest rock now. -Hagbard Celine

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