90 lines
3.0 KiB
C
90 lines
3.0 KiB
C
/***********************************************************************/
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/* */
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/* Objective Caml */
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/* */
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/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* Automatique. Distributed only by permission. */
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/* */
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/***********************************************************************/
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/* $Id$ */
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/* Machine-dependent interface with the asm code */
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#ifndef _stack_
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#define _stack_
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/* Macros to access the stack frame */
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#ifdef TARGET_alpha
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#define Saved_return_address(sp) *((long *)(sp - 8))
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#define Already_scanned(sp, retaddr) (retaddr & 1L)
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#define Mark_scanned(sp, retaddr) (*((long *)(sp - 8)) = retaddr | 1L)
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#define Mask_already_scanned(retaddr) (retaddr & ~1L)
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#define Callback_link(sp) ((struct caml_context *)(sp + 16))
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#endif
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#ifdef TARGET_sparc
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#define Saved_return_address(sp) *((long *)(sp + 92))
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#define Callback_link(sp) ((struct caml_context *)(sp + 104))
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#endif
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#ifdef TARGET_i386
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#define Saved_return_address(sp) *((long *)(sp - 4))
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#define Callback_link(sp) ((struct caml_context *)(sp + 8))
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#endif
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#ifdef TARGET_mips
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#define Saved_return_address(sp) *((long *)(sp - 4))
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#define Callback_link(sp) ((struct caml_context *)(sp + 16))
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#endif
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#ifdef TARGET_hppa
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#define Stack_grows_upwards
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#define Saved_return_address(sp) *((long *)sp)
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#define Callback_link(sp) ((struct caml_context *)(sp - 24))
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#endif
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#ifdef TARGET_power
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#define Saved_return_address(sp) *((long *)(sp - 4))
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#define Already_scanned(sp, retaddr) (retaddr & 1)
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#define Mark_scanned(sp, retaddr) (*((long *)(sp - 4)) = retaddr | 1)
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#define Mask_already_scanned(retaddr) (retaddr & ~1)
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#ifdef SYS_aix
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#define Trap_frame_size 24
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#else
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#define Trap_frame_size 8
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#endif
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#define Callback_link(sp) ((struct caml_context *)(sp + Trap_frame_size))
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#endif
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#ifdef TARGET_m68k
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#define Saved_return_address(sp) *((long *)(sp - 4))
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#define Callback_link(sp) ((struct caml_context *)(sp + 8))
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#endif
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#ifdef TARGET_arm
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#define Saved_return_address(sp) *((long *)(sp - 4))
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#define Callback_link(sp) ((struct caml_context *)(sp + 8))
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#endif
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/* Structure of Caml callback contexts */
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struct caml_context {
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char * bottom_of_stack; /* beginning of Caml stack chunk */
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unsigned long last_retaddr; /* last return address in Caml code */
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value * gc_regs; /* pointer to register block */
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};
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/* Declaration of variables used in the asm code */
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extern char * caml_bottom_of_stack;
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extern unsigned long caml_last_return_address;
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extern value * caml_gc_regs;
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extern char * caml_exception_pointer;
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extern value caml_globals[];
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extern long * caml_frametable[];
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#endif /* _stack_ */
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