Hey Guys, I have a question on how to store a variable whose length is 64 bits in 32 bits environment. I am intercepting system calls to modify its behavior and then return back to the user. So I first store the value and restore it later. But the system call I want to intercept is ftruncate64 and it has 64 bit width variable as its second variable. So I assume that I need two registers to save this value. Here is what I am trying to do. Assume that I have called CALL64(ftruncate64) from other place. #define CALL64(func) \ push %ebp; \ mov %esp, %ebp; \ REG_SAVE \ push %edx; \ push %ecx; \ push %ebx; \ call func; \ REG_RESTORE64() \ leave #define REG_RESTORE64() \ addl $12, %esp; \ pop %ebx; \ pop %ecx; \ pop %edx; \ mov %ebx, %esi; \ mov %ecx, %ebx; \ mov %esi, %ecx; But when I print out the value after the call, the value gets corrupted and I suppose this is due to the incorrect restoration of high order bits. Please give me some suggestion where I am doing wrong. Thank you very much. Ilho <>< -- YES, JESUS LOVES YOU, TOO. - Come for Eng. Christian Fellowship on Friday 6pm! For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life(John 3:16). -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
