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Dex



Joined: 03 Feb 2024
Posts: 3
Dex 03 Feb 2024, 13:54
Hi, i have some old code i written for fasmarm, iv not coded in about 12 year, when i try assembling it i get errors eg:
Quote:
./fasmarm test2.asm
flat assembler for ARM version 1.44 (built on fasm 1.73.30) (16384 kilobytes memory)
test2.asm [7]:
entry start ;
processed: entry start
error: undefined symbol 'start'.

When the code is :
Code:
;======================================================;
; Tiny Server.                                         ;
;------------------------------------------------------;
; By Craig Bamford (Dex)                  (11-03-2013) ;
;------------------------------------------------------;
format ELF executable                                  ;
entry start                                            ;
;======================================================;
; Is logging enabled ?                                 ;
;------------------------------------------------------;
LOGGING = 1                                            ;
LOGGING2 = 0                                           ;
;======================================================;
; Def                                                  ;
;------------------------------------------------------;
SOCK_STREAM       = 1                                  ;
AF_INET           = 2                                  ;
SYS_socketcall    = 102                                ;
SYS_SOCKET        = 1                                  ;
SYS_CONNECT       = 3                                  ;
SYS_SEND          = 9                                  ;
SYS_RECV          = 10                                 ;
IPPROTO_TCP       = 6                                  ;   Transmission Control Protocol
;======================================================;
; Print macro                                          ;
;------------------------------------------------------;
macro print _msg,_msglen                               ;
{ common                                               ;
        push      (r0)                                 ;
        push      (r1)                                 ;
        push      (r2)                                 ;
        push      (r7)                                 ;
        mov       r7, 0x4                              ;
        mov       r0, 0x1                              ;
        imm32     r1, _msg                             ;
        imm32     r2, _msglen                          ;
        swi       0x0                                  ;
                                                       ;
        pop       (r7)                                 ;
        pop       (r2)                                 ;
        pop       (r1)                                 ;
        pop       (r0)                                 ;
}                                                      ;
;======================================================;
; old tcpsend macro                                    ;
;------------------------------------------------------;
macro tcpsend _msg,_msglen                             ;
{ common                                               ;
        push      (r0)                                 ;
        push      (r1)                                 ;
        push      (r2)                                 ;
        push      (r3)                                 ;
        push      (r7)                                 ;
        imm32     r0, clientfd                         ;
        ldr       r0, [r0]                             ;
        imm32     r1, _msg                             ;
        imm32     r2, _msglen                          ;
        mov       r3, 0                                ;
        imm32     r7, 0x121                            ;
        swi       0x0                                  ;
        pop       (r7)                                 ;
        pop       (r3)                                 ;
        pop       (r2)                                 ;
        pop       (r1)                                 ;
        pop       (r0)                                 ;
}                                                      ;
;======================================================;
; old tcpsend macro                                    ;
;------------------------------------------------------;
; r0 = size to send                                    ;
;------------------------------------------------------;
macro tcpsend_reg _msg                                 ;
{ common                                               ;
        push      (r0)                                 ;
        push      (r1)                                 ;
        push      (r2)                                 ;
        push      (r3)                                 ;
        push      (r7)                                 ;
        mov       r2, r0                               ;
        imm32     r0, clientfd                         ;
        ldr       r0, [r0]                             ;
        imm32     r1, _msg                             ;
        mov       r3, 0                                ;
        imm32     r7, 0x121                            ;
        swi       0x0                                  ;
        pop       (r7)                                 ;
        pop       (r3)                                 ;
        pop       (r2)                                 ;
        pop       (r1)                                 ;
        pop       (r0)                                 ;
}                                                      ;
;======================================================;
; Print macro                                          ;
;------------------------------------------------------;
;  r0 = string size                                    ;
;------------------------------------------------------;
macro print_reg _msg,_msglen                           ;
{ common                                               ;
        push      (r0)                                 ;
        push      (r1)                                 ;
        push      (r2)                                 ;
        push      (r7)                                 ;
        mov       r2, r0                               ;
        mov       r7, 0x4                              ;
        mov       r0, 0x1                              ;
        imm32     r1, _msg                             ;
        swi       0x0                                  ;
                                                       ;
        pop       (r7)                                 ;
        pop       (r2)                                 ;
        pop       (r1)                                 ;
        pop       (r0)                                 ;
}                                                      ;
include 'FasmArm.inc'                              ;
segment readable writeable executable                  ;
;======================================================;
; Main start                                           ;
;------------------------------------------------------;
start:                                                 ;
        print msg,msg.msg_size                         ; print start message
;======================================================;
; Check commamd line for port number                   ;
;------------------------------------------------------;
        ldmfd     sp!, {r1}                            ;
        imm32     r0, argc                             ;
        str       r1, [r0]                             ;
        mov       r0, 80                               ; default port number
        cmp       r1, 1                                ;
    

Now when i assembly it with a old ver of fasmarm, it assembles fine.
OLD ver is 0.95.10
All the errors seem to be offset address.
Thanks for any help.
Post 03 Feb 2024, 13:54
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 20215
Location: In your JS exploiting you and your system
revolution 03 Feb 2024, 14:01
A file is missing.
Code:
include 'FasmArm.inc'                              ;
error: file not found.    
If I replace with this code:
Code:
;include 'FasmArm.inc'
macro imm32 arg& {nop}    
Output is this:
Code:
2 passes, 156 bytes.    
BTW: fasmarm versions numbers are d.dd, so 0.95.10 is probably the GUI version for fasmwarm.
Post 03 Feb 2024, 14:01
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Dex



Joined: 03 Feb 2024
Posts: 3
Dex 03 Feb 2024, 14:57
Ok, thanks revolution
Post 03 Feb 2024, 14:57
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 20215
Location: In your JS exploiting you and your system
revolution 03 Feb 2024, 15:07
Can we assume you found and fixed a bug in "FasmArm.inc"?
Post 03 Feb 2024, 15:07
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Dex



Joined: 03 Feb 2024
Posts: 3
Dex 03 Feb 2024, 15:37
Yes, it was i have two ver it seems, of the macro file eg; one upper case and one ver lower case and other differences , so all fixed now thanks.
Post 03 Feb 2024, 15:37
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