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yasm cross-compiler
Posted: Mon Apr 02, 2007 9:26 am
by ehird
I build yasm with ./configure --build=i586-elf --prefix=/usr/local/cross
Now when I compile with it i get a bus error:
Code: Select all
/usr/local/cross/bin/yasm kernel/start.asm -o kernel/start.o
sh: line 1: 8135 Bus error $AS $stem.asm -o $stem.o
mk: /usr/local/cross/bin/yasm kernel/start.asm -o kernel/start.o : exit status=exit(138)
What did I do wrong?
Posted: Mon Apr 02, 2007 10:31 am
by Brynet-Inc
Hmm.. That's a strange error.. haven't seen that one.. are you using a Makefile? Does it compile when manually evoked? Code Syntax issue?
Posted: Mon Apr 02, 2007 10:33 am
by ~
Posted: Mon Apr 02, 2007 10:43 am
by ehird
Brynet-Inc wrote:Hmm.. That's a strange error.. haven't seen that one.. are you using a Makefile? Does it compile when manually evoked? Code Syntax issue?
Bus error is what OS X likes to call segfaults.
It's a mkfile, mk is a plan9 tool similar to make but better. there's a port to unix-based systems.
It doesn't compile manually when evoked.
Syntax shouldn't cause segfaults
Posted: Mon Apr 02, 2007 10:46 am
by ~
That looked like trying to compile something "noncompilable" under MacOSX
Posted: Mon Apr 02, 2007 10:50 am
by ehird
It's a cross-compiler though - it shouldn't care about OS X. Here's the code, from bkerndev
Code: Select all
[BITS 32]
global start
start:
mov esp, sys_stack
jmp stublet
ALIGN 4
mboot:
MULTIBOOK_PAGE_ALIGN equ 1<<0
MULTIBOOT_MEMORY_INFO equ 1<<1
MULTIBOOT_HEADER_MAGIC equ 0x1BADB002
MULTIBOOT_HEADER_FLAGS equ MULTIBOOT_PAGE_ALIGN | MULTIBOOT_MEMORY_INFO
MULTIBOOT_CHECKSUM equ -(MULTIBOOT_HEADER_MAGIC +
MULTIBOOT_HEADER_FLAGS)
EXTERN code, bss, end
dd MULTIBOOT_HEADER_MAGIC
dd MULTIBOOT_HEADER_FLAGS
dd MULTIBOOT_CHECKSUM
stublet:
jmp $
SECTION .bss
resb 8192
sys_stack:
Posted: Mon Apr 02, 2007 10:54 am
by Brynet-Inc
ehird wrote:Bus error is what OS X likes to call segfaults.
Are you trying to run an ELF binary on your Mac then?..
ehird wrote:./configure --build=i586-elf ...
Or are you building the yasm binary for the Mac on a Linux system?
OSX uses the Mach-O File Format not ELF right?..
Posted: Mon Apr 02, 2007 10:58 am
by ehird
i586-elf is what my gcc/binutils are, and I've compiled GAS and C code with them just fine... and it works as a kernel...
So... I chose the same for yasm (as bkerndev uses intel syntax not gas' at/t... and I don't want to bother myself with the intel-syntax instructions for gas). I'm assembling here, not running the binary... you know... building the kernel...
Edit: and --build specifies "What formats this yasm will build". So that's saying "build a mac/Mach-O yasm that assembles to ELF"
Edit: Here's the line of yasm code that fails...
Code: Select all
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000006
yasm_intnum_copy (intn=0x2) at libyasm/intnum.c:351
351 switch (intn->type) {
Posted: Mon Apr 02, 2007 11:01 am
by Brynet-Inc
I don't think so.. yasm output defaults to "plain-binary"..
I'm pretty sure --build= will not specify the output format yasm will compile..
Posted: Mon Apr 02, 2007 11:04 am
by ehird
Code: Select all
--build=BUILD configure for building on BUILD [guessed]
Oh, yeah?
Posted: Mon Apr 02, 2007 11:06 am
by Combuster
YASM is written in C. To compile it you simply have to run
./configure
make
make install
you don't need to specify specific configure options if you dont know what you are doing. YASM as i have it automatically contains all targets in binary - you just have to select at run-time which one you want to use.
Posted: Mon Apr 02, 2007 11:12 am
by ehird
Yes, but I had the same problem when I used a normal yasm with -f elf, so I tried building a cross-assembler.
Posted: Mon Apr 02, 2007 11:15 am
by Brynet-Inc
ehird wrote:Yes, but I had the same problem when I used a normal yasm with -f elf, so I tried building a cross-assembler.
I think ehird is confused..
Posted: Mon Apr 02, 2007 11:16 am
by ehird
Brynet-Inc wrote:ehird wrote:Yes, but I had the same problem when I used a normal yasm with -f elf, so I tried building a cross-assembler.
I think ehird is confused..
I just want to get this to assemble
Posted: Mon Apr 02, 2007 11:17 am
by ~
In those cases I always prefer to start with only one version of binaries to have my work done and then advance eventually in additional features and support capabilities...