ref: 65327985abf5b3619428eb0fc489d875fcb9555b
dir: /u/dosasm.s/
#include "asm_i386.h" .data fpenv: .long 0, 0, 0, 0, 0, 0, 0, 0 .text .globl C(StartMSRInterval) C(StartMSRInterval): movl $0x11,%ecx // read the CESR .byte 0x0F .byte 0x32 // RDMSR andl $0xFE3FFE3F,%eax // stop both counters .byte 0x0F .byte 0x30 // WRMSR movl 4(%esp),%eax // point counter 0 to desired event, with counters andl $0x3F,%eax // still stopped movl $0x11,%ecx .byte 0x0F .byte 0x30 // WRMSR movl $0x12,%ecx // set counter 0 to the value 0 subl %eax,%eax subl %edx,%edx .byte 0x0F .byte 0x30 // WRMSR movl 4(%esp),%eax // restart counter 0 with selected event andl $0x3F,%eax subl %edx,%edx orl $0xC0,%eax movl $0x11,%ecx // control and event select .byte 0x0F .byte 0x30 // WRMSR ret .globl C(EndMSRInterval) C(EndMSRInterval): movl $0x12,%ecx // counter 0 .byte 0x0F .byte 0x32 // RDMSR ret // lower 32 bits of count in %eax #if 0 .data Lxxx: .long 0 .text .globl C(setstackcheck) C(setstackcheck): movl %esp,%eax subl $0x38000,%eax movl $0x5A5A5A5A,(%eax) movl %eax,Lxxx ret .globl C(dostackcheck) C(dostackcheck): movl Lxxx,%edx movl $0,%eax cmpl $0x5A5A5A5A,(%edx) jz qqq incl %eax qqq: ret #endif