66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
/* ###
|
|
* IP: GHIDRA
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
#include<stdio.h>
|
|
#include<stdlib.h>
|
|
|
|
//compile with fomit-frame-pointer
|
|
//how to turn off inferred variable references
|
|
|
|
long sum(void);
|
|
void diff(void);
|
|
|
|
int main(int argc, char **argv){
|
|
asm(".intel_syntax noprefix");
|
|
register long a asm ("r14");
|
|
register long b asm ("r15");
|
|
register long c asm ("rbx");
|
|
asm(".att_syntax prefix");
|
|
|
|
a = strtol(argv[1], NULL, 10);
|
|
b = strtol(argv[2], NULL, 10);
|
|
long s = sum();
|
|
printf("sum: %ld\n", s);
|
|
asm(".intel_syntax noprefix");
|
|
asm("push r15");
|
|
asm("push r14");
|
|
asm(".att_syntax prefix");
|
|
diff();
|
|
printf("diff: %ld\n",c);
|
|
|
|
return 0;
|
|
}
|
|
|
|
long sum(void){
|
|
asm(".intel_syntax noprefix");
|
|
asm("mov rax, r14");
|
|
asm("add rax, r15");
|
|
}
|
|
|
|
void diff(void){
|
|
asm(".intel_syntax noprefix");
|
|
asm("mov rbx, [rsp+8]");
|
|
asm("sub rbx, [rsp+0x10]");
|
|
asm("ret 16");
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|