| #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 |
| |
