Zeropain entries while compiling roms

When compiling roms I get a lot of zeropain entries – below is an example. They all seem to be at offset 0×13cf4. I’ve got a zeropain file full of them if anyone wants to see more. I have a sneaking suspicion that they started with DDE31c but I can’t be sure. Does anyone else see this?

Time: Wed Nov 29 18:58:20 2023
Location: Offset 00013cf4 in module SharedCLibrary
Current Wimp task: Task Obey
Last app to start: CC -APCS 3/32bit/fpe3 -cpu 6 -memaccess +L22+S22-L41 -zM -zps1 -Wp -c -depend !Depend  -DRISCOS -DBRANCH_NHUSB -D_KERNEL -DDISABLE_PACKED -DROM -IC:USB,TCPIPLibs:,C: -ff -fah -o o.xhci c.xhci

R0  = 0000001c R1  = 0000001c R2  = 00000000 R3  = 0000001d
R4  = 00000000 R5  = 000cc27c R6  = 00000000 R7  = 000b43f4
R8  = 00000000 R9  = 000b5c50 R10 = 000b84b4 R11 = 000b8fd8
R12 = 01010101 R13 = 000b8fc0 R14 = 80808080 R15 = fc173fd4
DFAR = 0000001c  Mode USR32  Flags nZCv if   PSR = 60000110

fc173f8c : e59f1008 : LDR     R1,&FC173F9C
fc173f90 : e51a221c : LDR     R2,[R10,#-540]
fc173f94 : e0821001 : ADD     R1,R2,R1
fc173f98 : ea00001a : B       &FC174008
fc173f9c : fc194fb0 : Undefined instruction
fc173fa0 : e52de004 : STR     R14,[R13,#-4]!
fc173fa4 : e2803001 : ADD     R3,R0,#1
fc173fa8 : e3100003 : TST     R0,#3
fc173fac : 0a000004 : BEQ     &FC173FC4
fc173fb0 : e4d01001 : LDRB    R1,[R0],#1
fc173fb4 : e3510000 : CMP     R1,#0
fc173fb8 : 0a000010 : BEQ     &FC174000
fc173fbc : e3100003 : TST     R0,#3
fc173fc0 : 1afffffa : BNE     &FC173FB0
fc173fc4 : e51fc620 : LDR     R12,&FC1739AC
fc173fc8 : e1a0e38c : MOV     R14,R12,LSL #7
fc173fcc * e4901004 * LDR     R1,[R0],#4
fc173fd0 : e041200c : SUB     R2,R1,R12
fc173fd4 : e1c22001 : BIC     R2,R2,R1
fc173fd8 : e112000e : TST     R2,R14
fc173fdc : 0afffffa : BEQ     &FC173FCC
fc173fe0 : e31100ff : TST     R1,#&FF            ; ="ÿ"
fc173fe4 : 02400003 : SUBEQ   R0,R0,#3
fc173fe8 : 0a000004 : BEQ     &FC174000
fc173fec : e3110cff : TST     R1,#&FF00
fc173ff0 : 02400002 : SUBEQ   R0,R0,#2
fc173ff4 : 0a000001 : BEQ     &FC174000
fc173ff8 : e31108ff : TST     R1,#&00FF0000
fc173ffc : 02400001 : SUBEQ   R0,R0,#1

R15 = fc173fd4 = SharedCLibrary +13cfc = strlen +34
R14_usr = 80808080 is nowhere in RAM

When compiling roms I get a lot of zeropain entries – below is an example. They all seem to be at offset 0×13cf4. I’ve got a zeropain file full of them if anyone wants to see more. I have a sneaking suspicion that they started with DDE31c but I can’t be sure. Does anyone else see this?

Is the CLib old?

A Pi ROM has just built fully here, pain free, on an RPi4 with DDE31c.

*fx0
RISC OS 5.29 (30 Nov 2023)
*help SharedCLibrary
==> Help on keyword SharedCLibrary
Module is: C Library       6.22 (29 Nov 2023)
*

HTH

I was using 6.21

It doesn’t always happen. I’ve just compiled the latest rom for my imx6 and there was no zeropain errors compiling it with the same setup. Anyway I’ve got the latest rom now.

Looks like it’s trying to read from &1C.

Isn’t that where the FIQ handler lives?

Look what I have just found on the Titanium from yesterday. 306, at least, of them. Obviously I managed not to notice at the time, but if I remember what I last did I will post an update. It is unusual!!.

I’ve just compiled the latest rom for my imx6 and there was no zeropain errors compiling it with the same setup.

It was iMx6 related. Hmm.

Time: Thu Dec 14 20:33:23 2023
Location: Offset 00013d3c in module SharedCLibrary
Current Wimp task: Task Obey
Last app to start: CC -APCS 3/32bit/fpe3 -cpu 7 -memaccess +L22+S22-L41 -zM -zps1 -Wp -c -depend !Depend   -DKERNEL -D_KERNEL -D__P(A)=A -DKLD_MODULE -DDISABLE_PACKED -DROM -IC:USB,TCPIPLibs:,C:,tbox: -ff -fah  -o o.usbroothub_subr c.usbroothub_subr

R0  = 0000001c R1  = 0000001c R2  = 00000000 R3  = 0000001d
R4  = 00000000 R5  = 000cc2b0 R6  = 00000000 R7  = 000b43f4
R8  = 00000000 R9  = 000b5c50 R10 = 000b84b4 R11 = 000b8fb0
R12 = 01010101 R13 = 000b8f98 R14 = 80808080 R15 = fc16e41c
DFAR = 0000001c  Mode USR32  Flags nZCv if   PSR = 60000010

fc16e3d4 : e59f1008 : LDR     R1,&FC16E3E4
fc16e3d8 : e51a221c : LDR     R2,[R10,#-540]
fc16e3dc : e0821001 : ADD     R1,R2,R1
fc16e3e0 : ea00001a : B       &FC16E450
fc16e3e4 : fc18f38c : Undefined instruction
fc16e3e8 : e52de004 : STR     R14,[R13,#-4]!
fc16e3ec : e2803001 : ADD     R3,R0,#1
fc16e3f0 : e3100003 : TST     R0,#3
fc16e3f4 : 0a000004 : BEQ     &FC16E40C
fc16e3f8 : e4d01001 : LDRB    R1,[R0],#1
fc16e3fc : e3510000 : CMP     R1,#0
fc16e400 : 0a000010 : BEQ     &FC16E448
fc16e404 : e3100003 : TST     R0,#3
fc16e408 : 1afffffa : BNE     &FC16E3F8
fc16e40c : e51fc620 : LDR     R12,&FC16DDF4
fc16e410 : e1a0e38c : MOV     R14,R12,LSL #7
fc16e414 * e4901004 * LDR     R1,[R0],#4
fc16e418 : e041200c : SUB     R2,R1,R12
fc16e41c : e1c22001 : BIC     R2,R2,R1
fc16e420 : e112000e : TST     R2,R14
fc16e424 : 0afffffa : BEQ     &FC16E414
fc16e428 : e31100ff : TST     R1,#&FF            ; ="ˇ"
fc16e42c : 02400003 : SUBEQ   R0,R0,#3
fc16e430 : 0a000004 : BEQ     &FC16E448
fc16e434 : e3110cff : TST     R1,#&FF00
fc16e438 : 02400002 : SUBEQ   R0,R0,#2
fc16e43c : 0a000001 : BEQ     &FC16E448
fc16e440 : e31108ff : TST     R1,#&00FF0000
fc16e444 : 02400001 : SUBEQ   R0,R0,#1
fc16e448 : e0400003 : SUB     R0,R0,R3
fc16e44c : e49df004 : LDR     PC,[R13],#4
fc16e450 : e3500006 : CMP     R0,#6

R15 = fc16e41c = SharedCLibrary +13d44 = strlen +34
R14_usr = 80808080 is nowhere in RAM

 *fx0
RISC OS 5.29 (09 Dec 2023)
*help sharedclibrary
==> Help on keyword SharedCLibrary
Module is: C Library       6.22 (29 Nov 2023)
*
*where 00013d3c
Address &00013D3C is at offset &0000BD3C in application memory
*