diff options
| author | Travis Bradshaw <travis.bradshaw@idsoftware.com> | 2012-01-31 14:32:09 -0600 |
|---|---|---|
| committer | Travis Bradshaw <travis.bradshaw@idsoftware.com> | 2012-01-31 14:32:09 -0600 |
| commit | 0023db327bc1db00068284b70e1db45857aeee35 (patch) | |
| tree | 01dd8366d20bd674741cfe8ceb069d82a2e33973 /WinQuake/dosasm.s | |
| download | quake-pum-0023db327bc1db00068284b70e1db45857aeee35.tar.gz | |
The Quake sources as originally release under the GPL license on December 21, 1999
Diffstat (limited to 'WinQuake/dosasm.s')
| -rw-r--r-- | WinQuake/dosasm.s | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/WinQuake/dosasm.s b/WinQuake/dosasm.s new file mode 100644 index 0000000..2633be9 --- /dev/null +++ b/WinQuake/dosasm.s @@ -0,0 +1,77 @@ +#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 + |