155 lines
7.3 KiB
C
155 lines
7.3 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2013 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#ifndef __STACK_FRAME_H__
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#define __STACK_FRAME_H__
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/* stack_frame.h - GT.M MUMPS stack frame */
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/* There are several references to this structure from assembly language; these include:
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*
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* From VMS: G_MSF.MAX
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* From Unix: g_msf.si
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* From z/OS: 'gtc.xxxxxxxx.maclib(GTMSFRME)'
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* 'gtc.xxxxxxxx.maclib(G$MSF)'
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*
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* Any changes to the stack frame must be reflected in those files as well.
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*
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* Warning: the lists above may not be complete.
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*/
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#include "hashtab_mname.h"
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typedef struct stack_frame_struct /* contents of the GT.M MUMPS stack frame */
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{
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struct rhead_struct *rvector; /* routine header */
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#if defined(__MVS__)
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unsigned char *mumsf_r5; /* register 5 */
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unsigned char *mumsf_r6; /* register 6 */
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unsigned char *mpc; /* mumps program counter */
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unsigned char *mumsf_r8; /* register 8 */
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unsigned char *mumsf_r9; /* register 9 */
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ht_ent_mname **l_symtab; /* local symbol table */
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unsigned char *temps_ptr; /* pointer to base of temps */
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unsigned char *ctxt; /* context pointer (base register for use when there's no PC-relative address mode) */
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int4 *literal_ptr; /* pointer to base of literals */
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unsigned char *mumsf_r14; /* register 14 */
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unsigned char *mumsf_r15; /* register 15 */
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unsigned char *mumsf_r0; /* register 0 */
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unsigned char *mumsf_r1; /* register 1 */
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unsigned char *calldm_base; /* register 2 */
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unsigned char *mumsf_r3; /* register 3 */
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#else
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ht_ent_mname **l_symtab; /* local symbol table */
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unsigned char *mpc; /* mumps program counter */
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unsigned char *ctxt; /* context pointer (base register for use when there's no PC-relative address mode) */
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#ifdef HAS_LITERAL_SECT
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int4 *literal_ptr; /* pointer to base of literals */
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#endif
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unsigned char *temps_ptr; /* pointer to base of temps */
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#endif
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char *vartab_ptr; /* variable table may be in rvector or on stack */
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GTM64_ONLY(struct stack_frame_struct *old_frame_pointer;) /* Moved old_frame_pointer near all pointers
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* for alignment and smaller stackframe size
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*/
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short vartab_len; /* variable table length */
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short temp_mvals; /* temp mval count if this frame for an indirect rtn (ihdtyp) */
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NON_GTM64_ONLY(struct stack_frame_struct *old_frame_pointer;) /* old_frame_pointer remains at the same
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* place for 32-bit platforms
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*/
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/* note the alignment of these next two fields is critical to correct operation of
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* opp_ret on the VMS platforms. Any changes here need to be reflected there.
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*/
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unsigned short type;
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unsigned char flags;
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bool dollar_test;
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/*uint4 glvn_indx;*/ /* state of glvn pool at frame creation time. For use when gtmpcat is changed. */
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unsigned char *for_ctrl_stack;/* NOTE: temporarily using this field for glvn_indx so that gtmpcat works */
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mval *ret_value;
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} stack_frame;
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/* Stack frame types */
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#define SFT_COUNT (1 << 0) /* 0x0001 frame counts (real code) or doesn't (transcendental code) */
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#define SFT_DM (1 << 1) /* 0x0002 direct mode */
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#define SFT_REP_OP (1 << 2) /* 0x0004 frame to replace opcode (zbreak has already occured) */
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#define SFT_ZBRK_ACT (1 << 3) /* 0x0008 action frame for zbreak */
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#define SFT_DEV_ACT (1 << 4) /* 0x0010 action frame for device error handler */
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#define SFT_ZTRAP (1 << 5) /* 0x0020 error handler frame ($ZTRAP or $ETRAP) */
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/* 0x0040 VACANT!!!: extfun frame is no longer used */
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#define SFT_ZSTEP_ACT (1 << 7) /* 0x0080 action frame for a zstep */
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#define SFT_ZINTR (1 << 8) /* 0x0100 $zinterrupt frame */
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#define SFT_TRIGR (1 << 9) /* 0x0200 Trigger base frame */
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#define SFT_ZINTR_OFF ~(SFT_ZINTR) /* Mask to turn off SFF_ZINTR */
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/* The following definition identifies a frame that is running a line of code - either in a routine or what amounts to an XECUTE
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* it excludes frames dealing with @ indirection and frames generated for various nefarious internal purposes.
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* As of this writing, it's used in op_unwind to identify a frame that should receive a relocated for_ctrl_stack created by an @
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* frame - see op_unwind for the code and additional comments
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*/
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#define SFT_LINE_OF_CODE_FRAME (SFT_COUNT | SFT_ZBRK_ACT | SFT_DEV_ACT | SFT_ZTRAP | SFT_ZSTEP_ACT | SFT_ZINTR)
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/* Flags for flag byte */
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#define SFF_INDCE (1 << 0) /* 0x01 This frame is executing an indirect cache entry */
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#define SFF_ZTRAP_ERR (1 << 1) /* 0x02 error occured during $ZTRAP compilation */
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#define SFF_DEV_ACT_ERR (1 << 2) /* 0x04 compilation error occured in device exception handler */
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#define SFF_CI (1 << 3) /* 0x08 call-in base frame */
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#define SFF_ETRAP_ERR (1 << 4) /* 0x10 An $ETRAP style error occurred while in this frame. A return to this frame will
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* cause the getframe macro to invoke error_return() for further error processing.
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*/
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#define SFF_UNW_SYMVAL (1 << 5) /* 0x20 Unwound a symval in this stackframe (relevant to tp_restart) */
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#define SFF_IMPLTSTART_CALLD (1 << 6) /* 0x40 This frame initiated a trigger call or spanning node transaction
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* - checked by MUM_TSTART to prevent error returns to the frame
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* which would cause a restart of error handling.
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*/
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#define SFF_INDCE_OFF ~(SFF_INDCE) /* Mask to turn off SFF_INDCE */
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#define SFF_ZTRAP_ERR_OFF ~(SFF_ZTRAP_ERR) /* Mask to turn off SFF_ZTRAP_ERR */
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#define SFF_DEV_ACT_ERR_OFF ~(SFF_DEV_ACT_ERR) /* Mask to turn off SFF_DEV_ACT_ERR */
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#define SFF_CI_OFF ~(SFF_CI) /* Mask to turn off SFF_CI */
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#define SFF_ETRAP_ERR_OFF ~(SFF_ETRAP_ERR) /* Mask to turn off SFF_ETRAP_ERR */
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#define SFF_UNW_SYMVAL_OFF ~(SFF_UNW_SYMVAL) /* Mask to turn off SFF_UNW_SYMVAL */
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#define SFF_IMPLTSTART_CALLD_OFF ~(SFF_IMPLTSTART_CALLD) /* Mask to turn off SFF_IMPLTSTART_CALLD */
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#define ADJUST_FRAME_POINTER(fptr, shift) \
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{ \
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GBLREF stack_frame *error_frame; \
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stack_frame *oldfp; \
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\
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oldfp = fptr; \
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fptr = (stack_frame *)((char *)oldfp - shift); \
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if (error_frame == oldfp) \
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{ /* Adjust "error_frame" as well */ \
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assert(error_frame >= frame_pointer); \
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error_frame = fptr; \
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} \
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}
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void new_stack_frame(rhdtyp *rtn_base, unsigned char *context, unsigned char *transfer_addr);
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void new_stack_frame_sp(rhdtyp *rtn_base, unsigned char *context, unsigned char *transfer_addr);
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int4 symbinit(void);
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unsigned char *get_symb_line(unsigned char *out, unsigned char **b_line, unsigned char **ctxt);
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unsigned char *symb_line(unsigned char *in_addr, unsigned char *out, unsigned char **b_line, rhdtyp *routine);
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void copy_stack_frame(void);
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void copy_stack_frame_sp(void);
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void exfun_frame(void);
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void exfun_frame_sp(void);
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void exfun_frame_push_dummy_frame(void);
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void base_frame(rhdtyp *base_address);
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void pseudo_ret(void);
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void call_dm(void);
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int dm_start(void);
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stack_frame *op_get_msf (void);
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int op_zbreak(stack_frame *fp);
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void adjust_frames(unsigned char *old_ptext_beg, unsigned char *old_ptext_end, unsigned char *new_ptext_beg);
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#endif
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