Message-ID: <3240C0FD.759F@cs.com> Date: Wed, 18 Sep 1996 20:41:49 -0700 From: "John M. Aldrich" Reply-To: fighteer AT cs DOT com Organization: Three pounds of chaos and a pinch of salt MIME-Version: 1.0 To: djgpp-workers AT delorie DOT com Subject: Re: "djverify" - DJGPP Installation Diagnostic Program References: <199609140151 DOT VAA27677 AT delorie DOT com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit DJ Delorie wrote: > > > However, how do I convince symify to use the modified stub that I > > have made instead of the standard one? I don't want to get rid of > > the standard stub, for obvious reasons. Ideally, the new stub would > > be in the same directory as the program itself. > > You build a new version of symify. Okay... Here's a question that will show my mostly complete ignorance of assembly. :) I have examined the stub.asm code, and while most of it is comprehensible, it still doesn't give me any clues on how to return system exit codes in assembly. Obviously, the critical part of stub.asm is the parts that generate the error messages. Exactly what instructions would I need to add here to set an error code, and how do I output said code in the exit call? Thanks for the help! I think I've got a good start on the rest of the project, but my lack of knowledge of assembly is a hindrance here. I attach below the relevant sections of stub.asm. ===== cut here ===== ;----------------------------------------------------------------------------- ; Most errors come here, early ones jump direct (8088 instructions) error_no_progfile: mov dx, msg_no_progfile jmp error_fn error_not_exe: mov dx, msg_not_exe jmp error_fn error_not_coff: mov dx, msg_not_coff ; jmp error_fn error_fn: push dx mov bx, [loadname_nul] ; error, print file name movb [bx], '$' mov bx, loadname jmp @f1 error_no_dos_memory_umb: call restore_umb error_no_dos_memory: mov dx, msg_no_dos_memory jmp error error_in_modesw: mov dx, msg_error_in_modesw jmp error perror_no_selectors: mov dx, msg_no_selectors jmp error perror_no_dpmi_memory: mov dx, msg_no_dpmi_memory jmp error perror_no_dos_memory: mov dx, msg_no_dos_memory ; jmp error error: push dx mov bx, err_string @f1: call printstr pop bx call printstr exit: mov bx, crlfdollar call printstr mov ax, 0x4cff ; error exit int 0x21 ===== end ===== -- -------------------------------------------------------------------------- | John M. Aldrich, aka Fighteer I | fighteer AT cs DOT com | | Proud owner of what might one day | http://www.cs.com/fighteer | | be a spectacular MUD... | Plan: To make Bill Gates suffer | --------------------------------------------------------------------------