diff options
Diffstat (limited to 'lib/libpthread/arch/sparc64/uthread_machdep_asm.S')
| -rw-r--r-- | lib/libpthread/arch/sparc64/uthread_machdep_asm.S | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/libpthread/arch/sparc64/uthread_machdep_asm.S b/lib/libpthread/arch/sparc64/uthread_machdep_asm.S new file mode 100644 index 00000000000..aef33143968 --- /dev/null +++ b/lib/libpthread/arch/sparc64/uthread_machdep_asm.S @@ -0,0 +1,39 @@ +/* $OpenBSD: uthread_machdep_asm.S,v 1.1 2001/09/10 20:00:14 jason Exp $ */ +/* David Leonard <d@csee.uq.edu.au>. Public domain. */ + +#include <machine/asm.h> +#include <machine/trap.h> + +/* + * Switch stacks. + * On sparc this also means we switch register windows. + */ + +#ifdef __sparcv9__ +#define flushw .word 0x81580000 +#else +#define flushw t T_FLUSHWIN +#endif + +#define SA(x) (((x)+15)&(~0x1f)) +#define MINFRAME ((16+1+6)*8) + +/* void _thread_switch(int newstate[2], int savestate[2], int flags); */ +ENTRY(_thread_machdep_switch) + + /* new window */ + save %sp, -SA(MINFRAME), %sp + + /* flush all windows (except current one) into memory frames */ + flushw + + /* switch the stack pointer and return address */ + st %fp, [%i1 + 0] + st %i7, [%i1 + 4] + ld [%i0 + 0], %fp + ld [%i0 + 4], %i7 + + /* return to saved window at new %fp */ + ret + restore + |