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