Pankaj Kohli writes: > Yeah, that was me who asked it on kerneltrap :) > If it is trying to align ESP on a 16-byte boundary, that seems fine > for a single integer variable or anything less than 16 bytes, but why > is it allocating 116 bytes for 100 byte buffer ? That doesn't fit on a > 16-byte boundary. Where's the mystery? > Dump of assembler code for function main: > 0x080483a4 : lea 0x4(%esp),%ecx > 0x080483a8 : and $0xfffffff0,%esp sp = sp & -16 // sp is 16-aligned > 0x080483ab : pushl 0xfffffffc(%ecx) sp -= 4 // sp is 4-aligned > 0x080483ae : push %ebp sp -= 4 // sp is 8-aligned > 0x080483af : mov %esp,%ebp > 0x080483b1 : push %ecx sp -= 4 // sp is 4-aligned > 0x080483b2 : sub $0x74,%esp sp -= 116 // sp is 16-aligned Andrew.
