27 lines
520 B
C
27 lines
520 B
C
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#ifndef ARCH_H__
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#define ARCH_H__
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#ifndef __USE_GNU
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# define __USE_GNU
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#endif
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#include <ucontext.h>
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struct Context {
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uintptr_t ksp;
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void *vm_head;
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ucontext_t uc;
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// skip the red zone of the stack frame, see the amd64 ABI manual for details
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uint8_t redzone[128];
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};
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#define GPR1 uc.uc_mcontext.gregs[REG_RDI]
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#define GPR2 uc.uc_mcontext.gregs[REG_RSI]
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#define GPR3 uc.uc_mcontext.gregs[REG_RDX]
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#define GPR4 uc.uc_mcontext.gregs[REG_RCX]
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#define GPRx uc.uc_mcontext.gregs[REG_RAX]
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#undef __USE_GNU
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#endif
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