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author | Ludovic Courtès <ludo@gnu.org> | 2009-09-02 00:07:27 +0200 |
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committer | Ludovic Courtès <ludo@gnu.org> | 2009-09-02 01:37:37 +0200 |
commit | 5f236208d0d864546e59afa0f5a11c9b3ba14b10 (patch) | |
tree | eed5d9203a2633c8efb85c1b36425eab87574299 /libguile/frames.h | |
parent | f0eb5ae6c173aed35965b0561897fda1d8ff0db1 (diff) | |
parent | d7e7a02a6251c8ed4f76933d9d30baeee3f599c0 (diff) | |
download | guile-5f236208d0d864546e59afa0f5a11c9b3ba14b10.tar.gz |
Merge branch 'boehm-demers-weiser-gc' into bdw-gc-static-alloc
Conflicts:
acinclude.m4
libguile/strings.c
Diffstat (limited to 'libguile/frames.h')
-rw-r--r-- | libguile/frames.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/libguile/frames.h b/libguile/frames.h new file mode 100644 index 000000000..0165924a7 --- /dev/null +++ b/libguile/frames.h @@ -0,0 +1,126 @@ +/* Copyright (C) 2001, 2009 Free Software Foundation, Inc. + * * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * as published by the Free Software Foundation; either version 3 of + * the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#ifndef _SCM_FRAMES_H_ +#define _SCM_FRAMES_H_ + +#include <libguile.h> +#include "programs.h" + + +/* + * VM frames + */ + +/* VM Frame Layout + --------------- + + | ... | + | Intermed. val. 0 | <- fp + bp->nargs + bp->nlocs = SCM_FRAME_UPPER_ADDRESS (fp) + +==================+ + | Local variable 1 | + | Local variable 0 | <- fp + bp->nargs + | Argument 1 | + | Argument 0 | <- fp + | Program | <- fp - 1 + +------------------+ + | Return address | + | MV return address| + | Dynamic link | <- fp - 4 = SCM_FRAME_DATA_ADDRESS (fp) = SCM_FRAME_LOWER_ADDRESS (fp) + +==================+ + | | + + As can be inferred from this drawing, it is assumed that + `sizeof (SCM *) == sizeof (SCM)', since pointers (the `link' parts) are + assumed to be as long as SCM objects. */ + +#define SCM_FRAME_DATA_ADDRESS(fp) (fp - 4) +#define SCM_FRAME_UPPER_ADDRESS(fp) \ + (fp \ + + SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp))->nargs \ + + SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp))->nlocs) +#define SCM_FRAME_LOWER_ADDRESS(fp) (fp - 4) + +#define SCM_FRAME_BYTE_CAST(x) ((scm_t_uint8 *) SCM_UNPACK (x)) +#define SCM_FRAME_STACK_CAST(x) ((SCM *) SCM_UNPACK (x)) + +#define SCM_FRAME_RETURN_ADDRESS(fp) \ + (SCM_FRAME_BYTE_CAST (SCM_FRAME_DATA_ADDRESS (fp)[2])) +#define SCM_FRAME_SET_RETURN_ADDRESS(fp, ra) \ + ((SCM_FRAME_DATA_ADDRESS (fp)[2])) = (SCM)(ra); +#define SCM_FRAME_MV_RETURN_ADDRESS(fp) \ + (SCM_FRAME_BYTE_CAST (SCM_FRAME_DATA_ADDRESS (fp)[1])) +#define SCM_FRAME_SET_MV_RETURN_ADDRESS(fp, mvra) \ + ((SCM_FRAME_DATA_ADDRESS (fp)[1])) = (SCM)(mvra); +#define SCM_FRAME_DYNAMIC_LINK(fp) \ + (SCM_FRAME_STACK_CAST (SCM_FRAME_DATA_ADDRESS (fp)[0])) +#define SCM_FRAME_SET_DYNAMIC_LINK(fp, dl) \ + ((SCM_FRAME_DATA_ADDRESS (fp)[0])) = (SCM)(dl); +#define SCM_FRAME_VARIABLE(fp,i) fp[i] +#define SCM_FRAME_PROGRAM(fp) fp[-1] + + +/* + * Heap frames + */ + +SCM_API scm_t_bits scm_tc16_vm_frame; + +struct scm_vm_frame +{ + SCM stack_holder; + SCM *fp; + SCM *sp; + scm_t_uint8 *ip; + scm_t_ptrdiff offset; +}; + +#define SCM_VM_FRAME_P(x) SCM_SMOB_PREDICATE (scm_tc16_vm_frame, x) +#define SCM_VM_FRAME_DATA(x) ((struct scm_vm_frame*)SCM_SMOB_DATA (x)) +#define SCM_VM_FRAME_STACK_HOLDER(f) SCM_VM_FRAME_DATA(f)->stack_holder +#define SCM_VM_FRAME_FP(f) SCM_VM_FRAME_DATA(f)->fp +#define SCM_VM_FRAME_SP(f) SCM_VM_FRAME_DATA(f)->sp +#define SCM_VM_FRAME_IP(f) SCM_VM_FRAME_DATA(f)->ip +#define SCM_VM_FRAME_OFFSET(f) SCM_VM_FRAME_DATA(f)->offset +#define SCM_VALIDATE_VM_FRAME(p,x) SCM_MAKE_VALIDATE (p, x, VM_FRAME_P) + +SCM_API SCM scm_c_make_vm_frame (SCM stack_holder, SCM *fp, SCM *sp, + scm_t_uint8 *ip, scm_t_ptrdiff offset); +SCM_API SCM scm_vm_frame_p (SCM obj); +SCM_API SCM scm_vm_frame_program (SCM frame); +SCM_API SCM scm_vm_frame_arguments (SCM frame); +SCM_API SCM scm_vm_frame_source (SCM frame); +SCM_API SCM scm_vm_frame_local_ref (SCM frame, SCM index); +SCM_API SCM scm_vm_frame_local_set_x (SCM frame, SCM index, SCM val); +SCM_API SCM scm_vm_frame_return_address (SCM frame); +SCM_API SCM scm_vm_frame_mv_return_address (SCM frame); +SCM_API SCM scm_vm_frame_dynamic_link (SCM frame); +SCM_API SCM scm_vm_frame_stack (SCM frame); + +SCM_API SCM scm_c_vm_frame_prev (SCM frame); + +SCM_INTERNAL void scm_bootstrap_frames (void); +SCM_INTERNAL void scm_init_frames (void); + +#endif /* _SCM_FRAMES_H_ */ + +/* + Local Variables: + c-file-style: "gnu" + End: +*/ |