/* * this is the internal transfer function. * * HISTORY * 17-Aug-12 Fantix King * Ported from amd64. */ #define STACK_REFPLUS 1 #ifdef SLP_EVAL #define STACK_MAGIC 0 #define REGS_TO_SAVE "r12", "r13", "r14", "r15" static int slp_switch(void) { void* ebp; void* ebx; unsigned int csr; unsigned short cw; int err; int *stackref, stsizediff; __asm__ volatile ("" : : : REGS_TO_SAVE); __asm__ volatile ("fstcw %0" : "=m" (cw)); __asm__ volatile ("stmxcsr %0" : "=m" (csr)); __asm__ volatile ("movl %%ebp, %0" : "=m" (ebp)); __asm__ volatile ("movl %%ebx, %0" : "=m" (ebx)); __asm__ ("movl %%esp, %0" : "=g" (stackref)); { SLP_SAVE_STATE(stackref, stsizediff); __asm__ volatile ( "addl %0, %%esp\n" "addl %0, %%ebp\n" : : "r" (stsizediff) ); SLP_RESTORE_STATE(); } __asm__ volatile ("movl %0, %%ebx" : : "m" (ebx)); __asm__ volatile ("movl %0, %%ebp" : : "m" (ebp)); __asm__ volatile ("ldmxcsr %0" : : "m" (csr)); __asm__ volatile ("fldcw %0" : : "m" (cw)); __asm__ volatile ("" : : : REGS_TO_SAVE); __asm__ volatile ("xorl %%eax, %%eax" : "=a" (err)); return err; } #endif /* * further self-processing support */ /* * if you want to add self-inspection tools, place them * here. See the x86_msvc for the necessary defines. * These features are highly experimental und not * essential yet. */