Difference between int and call instruction

int $3
int cc
int 21h wikipedia
interrupt assembly code
int 0x03
x86 interrupt list
0xccint instruction in x86

25 Jun 2015 Code wise: [code]struct s { int a,b,s; s() { a=2; b=3; } void sum() { s=a+b; } }; void main() { struct s What are the key differences between fabric, invoke and paver? will cause execution to return to the instruction following the CALL instruction. The procedure is called from another function by using the CALL instruction. descriptor (stdout) mov eax,4 ;system call number (sys_write) int 0x80 ;call kernel mov A stack is an array-like data structure in the memory in which data can be The short answer is that syscall has less overhead than int 0x80 . Sysenter Based System Call Mechanism in Linux 2.6 to take advantage of SYSENTER/SYSEXIT instructions provided by all Pentium II+ processors. 19 Jul 2016 2 Answers. Superficially, the difference is: CALL takes the procedure address, which can be either near or far, and provided either as a constant or in a register. Meanwhile, INT takes an interrupt number, which is used as an index in the interrupt vector table at 0000:0000 (in real mode) to look up the address. Contents: Registers | Memory and Addressing | Instructions | Calling Convention of the registers have lost their special purposes in the modern instruction set,INT is an assembly language instruction for x86 processors that generates a software interrupt. It is therefore entirely possible to use a far-call instruction to start the interrupt-function manually after pushing the flag register. By calling it with different parameters in the registers (mostly ah and al) you could access various The action of the INT n instruction (including the INTO and INT 3 instructions) is similar to that of a far call made with the CALL instruction. The primary difference is that with the INT n instruction, the EFLAGS register is pushed onto the stack before the return address. The action of the INT n instruction (including the INTO, INT3, and INT1 instructions) is similar to that of a far call made with the CALL instruction. The primary difference is that with the INT n instruction, the EFLAGS register is pushed onto the stack before the return address. The "call" and "jmpl" (jump and link) instructions in SPARC is the equivalent of M68000's "bsr" (or "jsr") and "rts". The "call" and "jmpl" int func(int x, int y, int z) { / { / . Difference between "call" in SPARC and "bsr" in M68000. There is one