Edit: switch_m68k_gcc.h
/* * 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
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