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| /*
| * this is the internal transfer function.
| *
| * HISTORY
| * 2014-01-06 Andreas Schwab <schwab@linux-m68k.org>
| * File created.
| */
|
| #ifdef SLP_EVAL
|
| #define STACK_MAGIC 0
|
| #define REGS_TO_SAVE "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \
| "%a2", "%a3", "%a4"
|
| static int
| slp_switch(void)
| {
| int err;
| int *stackref, stsizediff;
| void *fp, *a5;
| __asm__ volatile ("" : : : REGS_TO_SAVE);
| __asm__ volatile ("move.l %%fp, %0" : "=m"(fp));
| __asm__ volatile ("move.l %%a5, %0" : "=m"(a5));
| __asm__ ("move.l %%sp, %0" : "=r"(stackref));
| {
| SLP_SAVE_STATE(stackref, stsizediff);
| __asm__ volatile ("add.l %0, %%sp; add.l %0, %%fp" : : "r"(stsizediff));
| SLP_RESTORE_STATE();
| __asm__ volatile ("clr.l %0" : "=g" (err));
| }
| __asm__ volatile ("move.l %0, %%a5" : : "m"(a5));
| __asm__ volatile ("move.l %0, %%fp" : : "m"(fp));
| __asm__ volatile ("" : : : REGS_TO_SAVE);
| return err;
| }
|
| #endif
|
|
