mirror of https://github.com/odrling/Aegisub
184 lines
5.7 KiB
C
184 lines
5.7 KiB
C
/*
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** Stack frames.
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** Copyright (C) 2005-2015 Mike Pall. See Copyright Notice in luajit.h
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*/
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#ifndef _LJ_FRAME_H
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#define _LJ_FRAME_H
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#include "lj_obj.h"
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#include "lj_bc.h"
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/* -- Lua stack frame ----------------------------------------------------- */
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/* Frame type markers in callee function slot (callee base-1). */
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enum {
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FRAME_LUA, FRAME_C, FRAME_CONT, FRAME_VARG,
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FRAME_LUAP, FRAME_CP, FRAME_PCALL, FRAME_PCALLH
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};
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#define FRAME_TYPE 3
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#define FRAME_P 4
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#define FRAME_TYPEP (FRAME_TYPE|FRAME_P)
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/* Macros to access and modify Lua frames. */
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#define frame_gc(f) (gcref((f)->fr.func))
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#define frame_func(f) (&frame_gc(f)->fn)
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#define frame_ftsz(f) ((f)->fr.tp.ftsz)
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#define frame_type(f) (frame_ftsz(f) & FRAME_TYPE)
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#define frame_typep(f) (frame_ftsz(f) & FRAME_TYPEP)
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#define frame_islua(f) (frame_type(f) == FRAME_LUA)
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#define frame_isc(f) (frame_type(f) == FRAME_C)
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#define frame_iscont(f) (frame_typep(f) == FRAME_CONT)
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#define frame_isvarg(f) (frame_typep(f) == FRAME_VARG)
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#define frame_ispcall(f) ((frame_ftsz(f) & 6) == FRAME_PCALL)
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#define frame_pc(f) (mref((f)->fr.tp.pcr, const BCIns))
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#define frame_contpc(f) (frame_pc((f)-1))
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#if LJ_64
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#define frame_contf(f) \
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((ASMFunction)(void *)((intptr_t)lj_vm_asm_begin + \
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(intptr_t)(int32_t)((f)-1)->u32.lo))
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#else
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#define frame_contf(f) ((ASMFunction)gcrefp(((f)-1)->gcr, void))
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#endif
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#define frame_delta(f) (frame_ftsz(f) >> 3)
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#define frame_sized(f) (frame_ftsz(f) & ~FRAME_TYPEP)
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#define frame_prevl(f) ((f) - (1+bc_a(frame_pc(f)[-1])))
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#define frame_prevd(f) ((TValue *)((char *)(f) - frame_sized(f)))
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#define frame_prev(f) (frame_islua(f)?frame_prevl(f):frame_prevd(f))
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/* Note: this macro does not skip over FRAME_VARG. */
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#define setframe_pc(f, pc) (setmref((f)->fr.tp.pcr, (pc)))
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#define setframe_ftsz(f, sz) ((f)->fr.tp.ftsz = (sz))
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#define setframe_gc(f, p) (setgcref((f)->fr.func, (p)))
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/* -- C stack frame ------------------------------------------------------- */
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/* Macros to access and modify the C stack frame chain. */
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/* These definitions must match with the arch-specific *.dasc files. */
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#if LJ_TARGET_X86
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#define CFRAME_OFS_ERRF (15*4)
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#define CFRAME_OFS_NRES (14*4)
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#define CFRAME_OFS_PREV (13*4)
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#define CFRAME_OFS_L (12*4)
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#define CFRAME_OFS_PC (6*4)
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#define CFRAME_OFS_MULTRES (5*4)
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#define CFRAME_SIZE (12*4)
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#define CFRAME_SHIFT_MULTRES 0
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#elif LJ_TARGET_X64
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#if LJ_ABI_WIN
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#define CFRAME_OFS_PREV (13*8)
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#define CFRAME_OFS_PC (25*4)
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#define CFRAME_OFS_L (24*4)
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#define CFRAME_OFS_ERRF (23*4)
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#define CFRAME_OFS_NRES (22*4)
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#define CFRAME_OFS_MULTRES (21*4)
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#define CFRAME_SIZE (10*8)
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#define CFRAME_SIZE_JIT (CFRAME_SIZE + 9*16 + 4*8)
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#define CFRAME_SHIFT_MULTRES 0
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#else
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#define CFRAME_OFS_PREV (4*8)
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#define CFRAME_OFS_PC (7*4)
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#define CFRAME_OFS_L (6*4)
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#define CFRAME_OFS_ERRF (5*4)
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#define CFRAME_OFS_NRES (4*4)
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#define CFRAME_OFS_MULTRES (1*4)
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#define CFRAME_SIZE (10*8)
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#define CFRAME_SIZE_JIT (CFRAME_SIZE + 16)
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#define CFRAME_SHIFT_MULTRES 0
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#endif
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#elif LJ_TARGET_ARM
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#define CFRAME_OFS_ERRF 24
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#define CFRAME_OFS_NRES 20
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#define CFRAME_OFS_PREV 16
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#define CFRAME_OFS_L 12
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#define CFRAME_OFS_PC 8
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#define CFRAME_OFS_MULTRES 4
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#if LJ_ARCH_HASFPU
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#define CFRAME_SIZE 128
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#else
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#define CFRAME_SIZE 64
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#endif
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#define CFRAME_SHIFT_MULTRES 3
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#elif LJ_TARGET_PPC
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#if LJ_TARGET_XBOX360
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#define CFRAME_OFS_ERRF 424
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#define CFRAME_OFS_NRES 420
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#define CFRAME_OFS_PREV 400
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#define CFRAME_OFS_L 416
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#define CFRAME_OFS_PC 412
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#define CFRAME_OFS_MULTRES 408
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#define CFRAME_SIZE 384
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#define CFRAME_SHIFT_MULTRES 3
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#elif LJ_ARCH_PPC64
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#define CFRAME_OFS_ERRF 472
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#define CFRAME_OFS_NRES 468
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#define CFRAME_OFS_PREV 448
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#define CFRAME_OFS_L 464
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#define CFRAME_OFS_PC 460
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#define CFRAME_OFS_MULTRES 456
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#define CFRAME_SIZE 400
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#define CFRAME_SHIFT_MULTRES 3
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#else
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#define CFRAME_OFS_ERRF 48
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#define CFRAME_OFS_NRES 44
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#define CFRAME_OFS_PREV 40
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#define CFRAME_OFS_L 36
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#define CFRAME_OFS_PC 32
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#define CFRAME_OFS_MULTRES 28
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#define CFRAME_SIZE 272
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#define CFRAME_SHIFT_MULTRES 3
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#endif
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#elif LJ_TARGET_PPCSPE
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#define CFRAME_OFS_ERRF 28
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#define CFRAME_OFS_NRES 24
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#define CFRAME_OFS_PREV 20
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#define CFRAME_OFS_L 16
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#define CFRAME_OFS_PC 12
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#define CFRAME_OFS_MULTRES 8
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#define CFRAME_SIZE 184
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#define CFRAME_SHIFT_MULTRES 3
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#elif LJ_TARGET_MIPS
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#define CFRAME_OFS_ERRF 124
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#define CFRAME_OFS_NRES 120
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#define CFRAME_OFS_PREV 116
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#define CFRAME_OFS_L 112
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#define CFRAME_OFS_PC 20
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#define CFRAME_OFS_MULTRES 16
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#define CFRAME_SIZE 112
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#define CFRAME_SHIFT_MULTRES 3
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#else
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#error "Missing CFRAME_* definitions for this architecture"
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#endif
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#ifndef CFRAME_SIZE_JIT
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#define CFRAME_SIZE_JIT CFRAME_SIZE
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#endif
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#define CFRAME_RESUME 1
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#define CFRAME_UNWIND_FF 2 /* Only used in unwinder. */
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#define CFRAME_RAWMASK (~(intptr_t)(CFRAME_RESUME|CFRAME_UNWIND_FF))
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#define cframe_errfunc(cf) (*(int32_t *)(((char *)(cf))+CFRAME_OFS_ERRF))
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#define cframe_nres(cf) (*(int32_t *)(((char *)(cf))+CFRAME_OFS_NRES))
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#define cframe_prev(cf) (*(void **)(((char *)(cf))+CFRAME_OFS_PREV))
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#define cframe_multres(cf) (*(uint32_t *)(((char *)(cf))+CFRAME_OFS_MULTRES))
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#define cframe_multres_n(cf) (cframe_multres((cf)) >> CFRAME_SHIFT_MULTRES)
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#define cframe_L(cf) \
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(&gcref(*(GCRef *)(((char *)(cf))+CFRAME_OFS_L))->th)
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#define cframe_pc(cf) \
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(mref(*(MRef *)(((char *)(cf))+CFRAME_OFS_PC), const BCIns))
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#define setcframe_L(cf, L) \
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(setmref(*(MRef *)(((char *)(cf))+CFRAME_OFS_L), (L)))
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#define setcframe_pc(cf, pc) \
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(setmref(*(MRef *)(((char *)(cf))+CFRAME_OFS_PC), (pc)))
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#define cframe_canyield(cf) ((intptr_t)(cf) & CFRAME_RESUME)
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#define cframe_unwind_ff(cf) ((intptr_t)(cf) & CFRAME_UNWIND_FF)
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#define cframe_raw(cf) ((void *)((intptr_t)(cf) & CFRAME_RAWMASK))
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#define cframe_Lpc(L) cframe_pc(cframe_raw(L->cframe))
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#endif
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