tgrysztar / fasmg

flat assembler g - adaptable assembly engine

flat assembler g - examples library

This is a collection of various macroinstruction sets, scripts and examples for fasmg.

• The official website of flat assembler: http://flatassembler.net/
• Overview of fasmg: http://flatassembler.net/docs.php?article=fasmg
• Manual: http://flatassembler.net/docs.php?article=fasmg_manual

fasmg's Issues

Official Site is not working

I wake up 2/28 and 2 pm I open the Official Site but doesnt working 7 pm I checked but it doesnt work

Strange number to character conversion in 'display'

display 209,210,211,10
display 21'

The two lines above, when compiled, print three different characters on the first line of output, and one character on the second line. The character on the second line seems to be the same as character with code 210.
Is that interpretation of number 21' by design, or possibly a bug?
version: g.jmhx

Also, in the Fasm g manual there is missing a complete description of integer literals syntax, i.e. no mention that ' characters are accepted.

duplicate lines?

fasmg/core/source/malloc.inc

Lines 213 to 218 in e6f827d

	mov ecx,[ebx+FreeMemory.left]
	mov edx,[ebx+FreeMemory.right]
	mov [ecx+FreeMemory.right],eax
	mov [edx+FreeMemory.left],eax
	mov ecx,[ebx+FreeMemory.left]
	mov edx,[ebx+FreeMemory.right]

Duplicate lines look superfluous?

fix path to fasmg or bad include for make.cmd and examples ?

I think is a bug area of put fasmg on path and fix examples with set include folder
I suppose is need to add the fasmg on windows path and this let the set command to include the folder include.
I think is more good to set the path for examples to work with fasmg executable and not to add fasmg to windows path.
In this case the make.cmd come show this error:

C:\fasmg-master\core\examples\x86>fasmg win64avx.asm win64avx.exe

'fasmg' is not recognized as an internal or external command,
operable program or batch file.

The examples come with this include path and cannot access the real path fasmg-master\core\examples\x86\include\format, see:

include 'format\format.inc'   

Multi-language support in Windows resources:

Present resource macros do not support multiple resources with the same ID:

fasmg/packages/x86/include/macro/resource.inc

Lines 24 to 70 in 7080971

	macro resource dir,definitions&
	iterate <id,lang,label>, definitions
	dir dd 0,%t,0,%% shl 16
	local total,current,next,counter
	total = %%
	current = -1
	next = 0
	while current < next
	current = next
	counter = 0
	repeat total
	indx %
	if id = current
	if counter = 0
	dd id,80000000h+label.directory-root@resource
	end if
	counter = counter + 1
	label.count = counter
	else if id > current & ( next = current | next > id )
	next = id
	end if
	end repeat
	end while
	current = -1
	next = 0
	while current < next
	current = next
	counter = 0
	repeat total
	indx %
	if id = current
	if counter = 0
	label.directory dd 0,%t,0,label.count shl 16
	dd lang,label-root@resource
	label.resid = id
	else
	dd lang,label-root@resource
	end if
	counter = counter + 1
	else if id > current & ( next = current | next > id )
	next = id
	end if
	end repeat
	end while
	break
	end iterate
	end macro

It's best to use an external resource editor and load the RES file with:

section '.rsrc' resource from 'my_resource.res' data readable

The resource macros also lack support for named resources.

Some resource editors on github ...
https://github.com/katahiromz/RisohEditor

`format MS64 COFF` not builds

What is variant here?

fasmg/packages/x86/include/format/format.inc

Lines 298 to 309 in 8a97300

	macro format?.MS64?
	match =COFF?, variant
	format binary as 'obj'
	COFF.Settings.Machine = IMAGE_FILE_MACHINE_AMD64
	COFF.Settings.Characteristics = IMAGE_FILE_32BIT_MACHINE or IMAGE_FILE_LINE_NUMS_STRIPPED or IMAGE_FILE_BYTES_REVERSED_LO
	format?.include 'coffms.inc'
	format?.include '../cpu/x64.inc'
	use64
	else
	err 'invalid argument'
	end match
	end macro

Excuse me if this is stupid question. I am a new in fasmg.
But I can not build format MS64 COFF line in my .asm file.

Can I use the same code base for different operating systems in a 64-bit architecture?

Hello. Can I use the same code base for different operating systems in a 64-bit architecture? There are no problems on the 32-bit version, neither in FASM nor in FASMG.
If possible, show an example of cross-platform (Win\Linux\Mac) 64-bit code on FASMG.

Leaky `count` not `local` in utf8.inc

The count variable should probably be local. Can leak and interfere with other code.

fasmg/packages/x86/include/encoding/utf8.inc

Lines 5 to 12 in 7080971

	local current,__input,char,wide
	if arg eqtype ''
	virtual at 0
	__input::
	db arg
	count = $
	end virtual
	current = 0

du size bug version g.igri1

mov eax,string.size

string du 'test',0
.size = $-string

Error: symbol 'size' is undefined or out of scope.

Invalid PE32/64 image directory bug

lea rax,[test1] ;no fixups generated
mov rax,test1 ;fixups generated

When used lea, in data directory fasm set invalid pointer IMAGE_DIRECTORY_ENTRY_BASERELOC
Also this bug present in fasm1

Test on ms link vs2017 with options:
link.exe /release /subsystem:windows /nocoffgrpinfo /dll /dynamicbase /entry:Main "test64.obj"

It worked correctly: IMAGE_DIRECTORY_ENTRY_BASERELOC/size are 0 and module is relocatable.
If build "exe" windows will load it with ASLR, then there is no message like "This app can't run on your PC"

Apple M1 binary

do you need help to make it work on Apple silicon? I can help :)

Looking forward broken?

I'm trying to use fasmg to write code in windows but, the format is not working

Inside the format/pe.inc line 360, it fails to get .SizeOfHeaders dd SIZE_OF_HEADERS, even if this symbol is defined on line 407 of the same file.

So I don't know how exactly it should work.

Also, the format.inc is not including the pe.inc file, it needs it to look the symbols, but it only includes the file after including the symbols, so this is also an issue of the looking forward looks like.

No fcomip instruction

thats it