130 lines
4.3 KiB
C
130 lines
4.3 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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/* en Automatique. All rights reserved. This file is distributed */
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/* under the terms of the GNU Library General Public License, with */
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/* the special exception on linking described in file ../LICENSE. */
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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 CAML_STACK_H
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#define CAML_STACK_H
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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) *((intnat *)((sp) - 8))
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#define Already_scanned(sp, retaddr) ((retaddr) & 1L)
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#define Mark_scanned(sp, retaddr) (*((intnat *)((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) *((intnat *)((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) *((intnat *)((sp) - 4))
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#ifdef SYS_macosx
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#define Callback_link(sp) ((struct caml_context *)((sp) + 16))
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#else
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#define Callback_link(sp) ((struct caml_context *)((sp) + 8))
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#endif
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#endif
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#ifdef TARGET_mips
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#define Saved_return_address(sp) *((intnat *)((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) *((intnat *)(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) *((intnat *)((sp) - SIZEOF_PTR))
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#define Already_scanned(sp, retaddr) ((retaddr) & 1)
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#define Mark_scanned(sp, retaddr) (*((intnat *)((sp) - SIZEOF_PTR)) = (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 32
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#else
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#define Trap_frame_size 16
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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) *((intnat *)((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) *((intnat *)((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_ia64
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#define Saved_return_address(sp) *((intnat *)((sp) + 8))
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#define Already_scanned(sp, retaddr) ((retaddr) & 1L)
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#define Mark_scanned(sp, retaddr) (*((intnat *)((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) + 32))
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#endif
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#ifdef TARGET_amd64
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#define Saved_return_address(sp) *((intnat *)((sp) - 8))
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#define Callback_link(sp) ((struct caml_context *)((sp) + 16))
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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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uintnat 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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/* Structure of frame descriptors */
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typedef struct {
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uintnat retaddr;
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unsigned short frame_size;
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unsigned short num_live;
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unsigned short live_ofs[1];
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} frame_descr;
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/* Hash table of frame descriptors */
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extern frame_descr ** caml_frame_descriptors;
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extern int caml_frame_descriptors_mask;
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#define Hash_retaddr(addr) \
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(((uintnat)(addr) >> 3) & caml_frame_descriptors_mask)
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extern void caml_init_frame_descriptors(void);
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extern void caml_register_frametable(intnat *);
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extern void caml_register_dyn_global(void *);
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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 uintnat 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 intnat caml_globals_inited;
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extern intnat * caml_frametable[];
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#endif /* CAML_STACK_H */
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