Added register clobber warning to read_tsc.

2007-01-22 15:15:30 +00:00 · 2007-01-22 15:15:30 +00:00 · d954a122f7
parent 78fe72e198
commit d954a122f7
1 changed files with 1 additions and 0 deletions
--- a/kernel/arch/i386/klib386.s
+++ b/kernel/arch/i386/klib386.s
@ -552,6 +552,7 @@ _level0:
 !*===========================================================================*
 ! PUBLIC void read_tsc(unsigned long *high, unsigned long *low);
 ! Read the cycle counter of the CPU. Pentium and up. 
+! This function clobbers edx and eax.
 .align 16
 _read_tsc:
 .data1 0x0f		! this is the RDTSC instruction