factor/vm/os-macosx-ppc.h

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#define FRAME_RETURN_ADDRESS(frame,delta) *((XT *)(REBASE_FRAME_SUCCESSOR(frame,delta) + 1) + 2)
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#define MACH_EXC_STATE_TYPE ppc_exception_state_t
#define MACH_EXC_STATE_FLAVOR PPC_EXCEPTION_STATE
#define MACH_EXC_STATE_COUNT PPC_EXCEPTION_STATE_COUNT
#define MACH_THREAD_STATE_TYPE ppc_thread_state_t
#define MACH_THREAD_STATE_FLAVOR PPC_THREAD_STATE
#define MACH_THREAD_STATE_COUNT PPC_THREAD_STATE_COUNT
#if __DARWIN_UNIX03
#define MACH_EXC_STATE_FAULT(exc_state) (exc_state)->__dar
#define MACH_STACK_POINTER(thr_state) (thr_state)->__r1
#define MACH_PROGRAM_COUNTER(thr_state) (thr_state)->__srr0
#define UAP_PROGRAM_COUNTER(ucontext) \
MACH_PROGRAM_COUNTER(&(((ucontext_t *)(ucontext))->uc_mcontext->__ss))
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#else
#define MACH_EXC_STATE_FAULT(exc_state) (exc_state)->dar
#define MACH_STACK_POINTER(thr_state) (thr_state)->r1
#define MACH_PROGRAM_COUNTER(thr_state) (thr_state)->srr0
#define UAP_PROGRAM_COUNTER(ucontext) \
MACH_PROGRAM_COUNTER(&(((ucontext_t *)(ucontext))->uc_mcontext->ss))
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#endif