P_Hansson
April 14th, 2008, 12:39 PM
Hi everyone!
(Edit: Please move to right forum if this is wrong.)
This is my first post here, I'm very new to Ubuntu and Linux. :)
At CS/university Linux is used is near every course, so I figured now would be a nice time to install it at home on my AMD64/I64 system.
Right now I have a project in the initial compiler technology course, which requires me to output to Intel x86 assembly code. Currently we're in design stage so we'd like to verify our design. But for some reason I can't compile the 32 bit code with gcc to link with C library (which works fine at university), because it complains about the push and pop instructions. Presumably it's because I'm not forcing it to compile for x86 targets - how do I do that?
I'm reading GCC manual but I'm not getting it to work.
An example of errors for anyone interested with most simple command:
petter@PETTERH2:~/eda180/project/design$ gcc errors.s
errors.s: Assembler messages:
errors.s:9: Error: suffix or operands invalid for `push'
errors.s:11: Error: suffix or operands invalid for `push'
errors.s:15: Error: suffix or operands invalid for `pop'
errors.s:17: Error: suffix or operands invalid for `pop'
errors.s:18: Error: suffix or operands invalid for `push'
Related file:
#errors.s
.data
disp: .skip 4 #(max number of used nested levels - 1) * 4 bytes
.text
.global main
main:
pushl %ebp #C lib expects EBP to be unchanged
subl $4, %esp #allocate local variables (Integer x)
pushl disp+0 #save old display (kind of redundant here but...)
movl %esp, disp+0 #set current display level to start at end of local vars
movl $1, 0(%esp) #x = 1
#call main_p1
popl disp+0 #restore display
addl $4, %esp #remove local variables
popl %ebp #restore EBP
pushl $0 #signify normal termination from main
call exit
(Edit: Please move to right forum if this is wrong.)
This is my first post here, I'm very new to Ubuntu and Linux. :)
At CS/university Linux is used is near every course, so I figured now would be a nice time to install it at home on my AMD64/I64 system.
Right now I have a project in the initial compiler technology course, which requires me to output to Intel x86 assembly code. Currently we're in design stage so we'd like to verify our design. But for some reason I can't compile the 32 bit code with gcc to link with C library (which works fine at university), because it complains about the push and pop instructions. Presumably it's because I'm not forcing it to compile for x86 targets - how do I do that?
I'm reading GCC manual but I'm not getting it to work.
An example of errors for anyone interested with most simple command:
petter@PETTERH2:~/eda180/project/design$ gcc errors.s
errors.s: Assembler messages:
errors.s:9: Error: suffix or operands invalid for `push'
errors.s:11: Error: suffix or operands invalid for `push'
errors.s:15: Error: suffix or operands invalid for `pop'
errors.s:17: Error: suffix or operands invalid for `pop'
errors.s:18: Error: suffix or operands invalid for `push'
Related file:
#errors.s
.data
disp: .skip 4 #(max number of used nested levels - 1) * 4 bytes
.text
.global main
main:
pushl %ebp #C lib expects EBP to be unchanged
subl $4, %esp #allocate local variables (Integer x)
pushl disp+0 #save old display (kind of redundant here but...)
movl %esp, disp+0 #set current display level to start at end of local vars
movl $1, 0(%esp) #x = 1
#call main_p1
popl disp+0 #restore display
addl $4, %esp #remove local variables
popl %ebp #restore EBP
pushl $0 #signify normal termination from main
call exit