All Questions
6 questions
0
votes
0
answers
318
views
llvm zerofill section in segment other than __DATA on MacOS Catalina
I have a forth system that can produce self modifying code.
Currently, I have put the place where the forth words and assembly is created in the __DATA segment, and consequently, I need to mark the ...
2
votes
1
answer
2k
views
assembly -- difference between `.text` and `.section __TEXT` on macOS?
When writing assembly codes manually on macOS, .section .text will lead to "unexpected token in '.section' directive" error, and to fix is to remove .section token.
But when I generate assembly codes ...
- 1,215
0
votes
1
answer
1k
views
How to generate executable from LLVM IR
I was reading http://www.stephendiehl.com/llvm/#llvm-introduction there is a piece of LLVM IR like this:
declare i32 @putchar(i32)
define i32 @add(i32 %a, i32 %b) {
%1 = add i32 %a, %b
ret i32 %...
- 4,733
1
vote
2
answers
417
views
Reassigning non-absolute variables in OSX's assembler
The following assembler directives, when compiled with clang on OSX, produce an error:
.set link,0
test:
.int link
.set link,test
test2:
.int link
.set link,test2
The error:
$ clang test.s
...
- 15.9k
3
votes
2
answers
1k
views
OS X asm C call with return value
I've been playing around with the asm macro in C to directly call some assembly instructions on OS X Mavericks to get a stack pointer address (from %rsp) and I've found really strange behaviour (at ...
- 33
9
votes
2
answers
762
views
MAC OSX Intel LLVM Assembler bug (causes Vorbis OGG loader to crash)
I had mysterious bug in loading Vorbis Ogg files on Mac OSX. The first file is loaded correctly, the second crashes in some code that indicates the file is corrupted, the same happens even if I load ...
- 171