aboutsummaryrefslogtreecommitdiff
path: root/gas/config/vms/vms-dbg.c
diff options
context:
space:
mode:
authorKen Raeburn <raeburn@cygnus>1992-12-08 09:31:57 +0000
committerKen Raeburn <raeburn@cygnus>1992-12-08 09:31:57 +0000
commit6c2b38e0870a9ad417c525a2d9e88683aa4bdd5b (patch)
tree9103dfc609e186a6fc16f9aa86eb6b092847b83c /gas/config/vms/vms-dbg.c
parentb41390d23d47e9e0c3eb15b22e2cf9f5a6c579a6 (diff)
downloadgdb-6c2b38e0870a9ad417c525a2d9e88683aa4bdd5b.zip
gdb-6c2b38e0870a9ad417c525a2d9e88683aa4bdd5b.tar.gz
gdb-6c2b38e0870a9ad417c525a2d9e88683aa4bdd5b.tar.bz2
replaced with newer code
Diffstat (limited to 'gas/config/vms/vms-dbg.c')
-rw-r--r--gas/config/vms/vms-dbg.c1147
1 files changed, 0 insertions, 1147 deletions
diff --git a/gas/config/vms/vms-dbg.c b/gas/config/vms/vms-dbg.c
deleted file mode 100644
index 5e0e8ec..0000000
--- a/gas/config/vms/vms-dbg.c
+++ /dev/null
@@ -1,1147 +0,0 @@
-/* This file is vms-dbg.c
-
- Copyright (C) 1987-1992 Free Software Foundation, Inc.
-
- This file is part of GAS, the GNU Assembler.
-
- GAS is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GAS 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#include <stdio.h>
-#include "as.h"
-#include "struc-symbol.h"
-#include "symbols.h"
-#include "objrecdef.h"
-#include <stab.h>
-
-/* This file contains many of the routines needed to output debugging info into
- * the object file that the VMS debugger needs to understand symbols. These
- * routines are called very late in the assembly process, and thus we can be
- * fairly lax about changing things, since the GSD and the TIR sections have
- * already been output.
- */
-
-/* We need this info to cross correlate between the stabs def for a symbol and
- * the actual symbol def. The actual symbol def contains the psect number and
- * offset, which is needed to declare a variable to the debugger for global
- * and static variables
- */
-struct VMS_Symbol {
- struct VMS_Symbol *Next;
- struct symbol *Symbol;
- int Size;
- int Psect_Index;
- int Psect_Offset;
-};
-extern struct VMS_Symbol *VMS_Symbols;
-
-enum advanced_type {BASIC,POINTER,ARRAY,ENUM,STRUCT,UNION,FUNCTION,VOID,UNKNOWN};
-
-/* this structure contains the information from the stabs directives, and the
- * information is filled in by VMS_typedef_parse. Everything that is needed
- * to generate the debugging record for a given symbol is present here.
- * This could be done more efficiently, using nested struct/unions, but for now
- * I am happy that it works.
- */
-struct VMS_DBG_Symbol{
- struct VMS_DBG_Symbol * next;
- enum advanced_type advanced; /* description of what this is */
- int dbx_type; /* this record is for this type */
- int type2; /* For advanced types this is the type referred to.
- i.e. the type a pointer points to, or the type
- of object that makes up an array */
- int VMS_type; /* Use this type when generating a variable def */
- int index_min; /* used for arrays - this will be present for all */
- int index_max; /* entries, but will be meaningless for non-arrays */
- int data_size; /* size in bytes of the data type. For an array, this
- is the size of one element in the array */
- int struc_numb; /* Number of the structure/union/enum - used for ref */
-};
-
-struct VMS_DBG_Symbol *VMS_Symbol_type_list={(struct VMS_DBG_Symbol*) NULL};
-
- /* we need this structure to keep track of forward references to
- * struct/union/enum that have not been defined yet. When they are ultimately
- * defined, then we can go back and generate the TIR commands to make a back
- * reference.
- */
-
- struct forward_ref{
- struct forward_ref * next;
- int dbx_type;
- int struc_numb;
- char resolved;
- };
-
- struct forward_ref * f_ref_root={(struct forward_ref*) NULL};
-
- static char * symbol_name;
- static structure_count=0;
-
- /* this routine converts a number string into an integer, and stops when it
- * sees an invalid character the return value is the address of the character
- * just past the last character read. No error is generated.
- */
- static char * cvt_integer(char* str,int * rtn){
- int ival, neg;
- neg = *str == '-' ? ++str, -1 : 1;
- ival=0; /* first get the number of the type for dbx */
- while((*str <= '9') && (*str >= '0'))
- ival = 10*ival + *str++ -'0';
- *rtn = neg*ival;
- return str;
- }
-
- /* this routine fixes the names that are generated by C++, ".this" is a good
- * example. The period does not work for the debugger, since it looks like
- * the syntax for a structure element, and thus it gets mightily confused
- */
- static fix_name(char* pnt){
- for( ;*pnt != 0; pnt++){
- if(*pnt == '.') *pnt = '$';
- };
- }
-
- /* this routine is used to compare the names of certain types to various
- * fixed types that are known by the debugger.
- */
-#define type_check(x) !strcmp( symbol_name , x )
-
- /* When defining a structure, this routine is called to find the name of
- * the actual structure. It is assumed that str points to the equal sign
- * in the definition, and it moves backward until it finds the start of the
- * name. If it finds a 0, then it knows that this structure def is in the
- * outermost level, and thus symbol_name points to the symbol name.
- */
- static char* get_struct_name(char* str){
- char* pnt;
- pnt=str;
- while((*pnt != ':') && (*pnt != '\0')) pnt--;
- if(*pnt == '\0') return symbol_name;
- *pnt-- = '\0';
- while((*pnt != ';') && (*pnt != '=')) pnt--;
- if(*pnt == ';') return pnt+1;
- while((*pnt < '0') || (*pnt > '9')) pnt++;
- while((*pnt >= '0') && (*pnt <= '9')) pnt++;
- return pnt;
- }
- /* search symbol list for type number dbx_type. Return a pointer to struct */
- static struct VMS_DBG_Symbol* find_symbol(int dbx_type){
- struct VMS_DBG_Symbol* spnt;
- spnt=VMS_Symbol_type_list;
- while (spnt!=(struct VMS_DBG_Symbol*) NULL){
- if(spnt->dbx_type==dbx_type) break;
- spnt=spnt->next;};
- if(spnt==(struct VMS_DBG_Symbol*) NULL) return 0;/*Dunno what this is*/
- return spnt;
- }
-
-
- /* Many good programmers cringe when they see a fixed size array - since I am
- * using this to generate the various descriptors for the data types present,
- * you might argue that the descriptor could overflow the array for a
- * complicated variable, and then I am in deep doo-doo. My answer to this is
- * that the debugger records that we write have all sorts of length bytes
- * stored in them all over the place, and if we exceed 127 bytes (since the top
- * bit indicates data, rather than a command), we are dead anyhow. So I figure
- * why not do this the easy way. Besides, to get 128 bytes, you need something
- * like an array with 10 indicies, or something like
- * char **************************************** var;
- * Lets get real. If some idiot writes programs like that he/she gets what
- * they deserve. (It is possible to overflow the record with a somewhat
- * simpler example, like: int (*(*(*(*(*(* sarr6)[1])[1])[2])[3])[4])[5];
- * but still...). And if someone in the peanut gallery wants to know "What
- * does VAX-C do with something like this?", I will tell you. It crashes.
- * At least this code has the good sense to convert it to *void.
- * In practice, I do not think that this presents too much of a problem, since
- * struct/union/enum all use defined types, which sort of terminate the
- * definition. It occurs to me that we could possibly do the same thing with
- * arrays and pointers, but I don't know quite how it would be coded.
- *
- * And now back to the regularly scheduled program...
- */
-#define MAX_DEBUG_RECORD 128
- static char Local[MAX_DEBUG_RECORD]; /* buffer for variable descriptor */
- static int Lpnt; /* index into Local */
- static char Asuffix[MAX_DEBUG_RECORD]; /* buffer for array descriptor */
- static int Apoint; /* index into Asuffix */
- static char overflow; /* flag to indicate we have written too much*/
- static int total_len; /* used to calculate the total length of variable
- descriptor plus array descriptor - used for len byte*/
- static int struct_number; /* counter used to assign indexes to struct
- unions and enums */
-
- /* this routine puts info into either Local or Asuffix, depending on the sign
- * of size. The reason is that it is easier to build the variable descriptor
- * backwards, while the array descriptor is best built forwards. In the end
- * they get put together, if there is not a struct/union/enum along the way
- */
- push(int value, int size){
- char * pnt;
- int i;
- int size1;
- long int val;
- val=value;
- pnt=(char*) &val;
- size1 = size;
- if (size < 0) {size1 = -size; pnt += size1-1;};
- if(size < 0)
- for(i=0;i<size1;i++) {
- Local[Lpnt--] = *pnt--;
- if(Lpnt < 0) {overflow = 1; Lpnt = 1;};}
- else for(i=0;i<size1;i++){
- Asuffix[Apoint++] = *pnt++;
- if(Apoint >= MAX_DEBUG_RECORD)
- {overflow = 1; Apoint =MAX_DEBUG_RECORD-1;};}
- }
-
- /* this routine generates the array descriptor for a given array */
- static array_suffix(struct VMS_DBG_Symbol* spnt2){
- struct VMS_DBG_Symbol * spnt;
- struct VMS_DBG_Symbol * spnt1;
- int rank;
- int total_size;
- int i;
- rank=0;
- spnt=spnt2;
- while(spnt->advanced != ARRAY) {
- spnt=find_symbol(spnt->type2);
- if(spnt == (struct VMS_DBG_Symbol *) NULL) return;};
- spnt1=spnt;
- spnt1=spnt;
- total_size= 1;
- while(spnt1->advanced == ARRAY) {rank++;
- total_size *= (spnt1->index_max - spnt1->index_min +1);
- spnt1=find_symbol(spnt1->type2);};
- total_size = total_size * spnt1->data_size;
- push(spnt1->data_size,2);
- if(spnt1->VMS_type == 0xa3) push(0,1);
- else push(spnt1->VMS_type,1);
- push(4,1);
- for(i=0;i<6;i++) push(0,1);
- push(0xc0,1);
- push(rank,1);
- push(total_size,4);
- push(0,4);
- spnt1=spnt;
- while(spnt1->advanced == ARRAY) {
- push(spnt1->index_max - spnt1->index_min+1,4);
- spnt1=find_symbol(spnt1->type2);};
- spnt1=spnt;
- while(spnt1->advanced == ARRAY) {
- push(spnt1->index_min,4);
- push(spnt1->index_max,4);
- spnt1=find_symbol(spnt1->type2);};
- }
-
- /* this routine generates the start of a variable descriptor based upon
- * a struct/union/enum that has yet to be defined. We define this spot as
- * a new location, and save four bytes for the address. When the struct is
- * finally defined, then we can go back and plug in the correct address
- */
- static new_forward_ref(int dbx_type){
- struct forward_ref* fpnt;
- fpnt = (struct forward_ref*) malloc(sizeof(struct forward_ref));
- fpnt->next = f_ref_root;
- f_ref_root = fpnt;
- fpnt->dbx_type = dbx_type;
- fpnt->struc_numb = ++structure_count;
- fpnt->resolved = 'N';
- push(3,-1);
- total_len = 5;
- push(total_len,-2);
- struct_number = - fpnt->struc_numb;
- }
-
- /* this routine generates the variable descriptor used to describe non-basic
- * variables. It calls itself recursively until it gets to the bottom of it
- * all, and then builds the descriptor backwards. It is easiest to do it this
- *way since we must periodically write length bytes, and it is easiest if we know
- *the value when it is time to write it.
- */
- static int gen1(struct VMS_DBG_Symbol * spnt,int array_suffix_len){
- struct VMS_DBG_Symbol * spnt1;
- int i;
- switch(spnt->advanced){
- case VOID:
- push(DBG$C_VOID,-1);
- total_len += 1;
- push(total_len,-2);
- return 0;
- case BASIC:
- case FUNCTION:
- if(array_suffix_len == 0) {
- push(spnt->VMS_type,-1);
- push(DBG$C_BASIC,-1);
- total_len = 2;
- push(total_len,-2);
- return 1;};
- push(0,-4);
- push(0xfa02,-2);
- total_len = -2;
- return 1;
- case STRUCT:
- case UNION:
- case ENUM:
- struct_number=spnt->struc_numb;
- if(struct_number < 0) {
- new_forward_ref(spnt->dbx_type);
- return 1;
- }
- push(DBG$C_STRUCT,-1);
- total_len = 5;
- push(total_len,-2);
- return 1;
- case POINTER:
- spnt1=find_symbol(spnt->type2);
- i=1;
- if(spnt1 == (struct VMS_DBG_Symbol *) NULL)
- new_forward_ref(spnt->type2);
- else i=gen1(spnt1,0);
- if(i){ /* (*void) is a special case, do not put pointer suffix*/
- push(DBG$C_POINTER,-1);
- total_len += 3;
- push(total_len,-2);
- };
- return 1;
- case ARRAY:
- spnt1=spnt;
- while(spnt1->advanced == ARRAY)
- {spnt1 = find_symbol(spnt1->type2);
- if(spnt1 == (struct VMS_DBG_Symbol *) NULL) {
- printf("gcc-as warning(debugger output):");
- printf("Forward reference error, dbx type %d\n",
- spnt->type2);
- return;}
- };
- /* It is too late to generate forward references, so the user gets a message.
- * This should only happen on a compiler error */
- i=gen1(spnt1,1);
- i=Apoint;
- array_suffix(spnt);
- array_suffix_len = Apoint - i;
- switch(spnt1->advanced){
- case BASIC:
- case FUNCTION:
- break;
- default:
- push(0,-2);
- total_len += 2;
- push(total_len,-2);
- push(0xfa,-1);
- push(0x0101,-2);
- push(DBG$C_COMPLEX_ARRAY,-1);
- };
- total_len += array_suffix_len + 8;
- push(total_len,-2);
- };
- }
-
- /* this generates a suffix for a variable. If it is not a defined type yet,
- * then dbx_type contains the type we are expecting so we can generate a
- * forward reference. This calls gen1 to build most of the descriptor, and
- * then it puts the icing on at the end. It then dumps whatever is needed
- * to get a complete descriptor (i.e. struct reference, array suffix ).
- */
- static generate_suffix(struct VMS_DBG_Symbol * spnt,int dbx_type){
- int ilen;
- int i;
- char pvoid[6] = {5,0xaf,0,1,0,5};
- struct VMS_DBG_Symbol * spnt1;
- Apoint=0;
- Lpnt =MAX_DEBUG_RECORD-1;
- total_len=0;
- struct_number = 0;
- overflow = 0;
- if(spnt == (struct VMS_DBG_Symbol*) NULL)
- new_forward_ref(dbx_type);
- else{
- if(spnt->VMS_type != 0xa3) return 0; /* no suffix needed */
- gen1(spnt,0);
- };
- push(0x00af,-2);
- total_len += 4;
- push(total_len,-1);
- /* if the variable descriptor overflows the record, output a descriptor for
- * a pointer to void.
- */
- if((total_len >= MAX_DEBUG_RECORD) || overflow) {
- printf(" Variable descriptor %d too complicated. Defined as *void ",spnt->dbx_type);
- VMS_Store_Immediate_Data(pvoid, 6, OBJ$C_DBG);
- return;
- };
- i=0;
- while(Lpnt < MAX_DEBUG_RECORD-1) Local[i++] = Local[++Lpnt];
- Lpnt = i;
- /* we use this for a reference to a structure that has already been defined */
- if(struct_number > 0){
- VMS_Store_Immediate_Data(Local, Lpnt, OBJ$C_DBG);Lpnt=0;
- VMS_Store_Struct(struct_number);};
- /* we use this for a forward reference to a structure that has yet to be
- *defined. We store four bytes of zero to make room for the actual address once
- * it is known
- */
- if(struct_number < 0){
- struct_number = -struct_number;
- VMS_Store_Immediate_Data(Local, Lpnt,OBJ$C_DBG);Lpnt=0;
- VMS_Def_Struct(struct_number);
- for(i=0;i<4;i++) Local[Lpnt++] = 0;
- VMS_Store_Immediate_Data(Local, Lpnt, OBJ$C_DBG);Lpnt=0;
- };
- i=0;
- while(i<Apoint) Local[Lpnt++] = Asuffix[i++];
- if(Lpnt != 0)
- VMS_Store_Immediate_Data(Local, Lpnt, OBJ$C_DBG);
- Lpnt=0;
- }
-
- /* This routine generates a symbol definition for a C sybmol for the debugger.
- * It takes a psect and offset for global symbols - if psect < 0, then this is
- * a local variable and the offset is relative to FP. In this case it can
- * be either a variable (Offset < 0) or a parameter (Offset > 0).
- */
- VMS_DBG_record(struct VMS_DBG_Symbol* spnt,int Psect,int Offset, char* Name)
-{
- char* pnt;
- int j;
- int maxlen;
- int i=0;
- if(Psect < 0) { /* this is a local variable, referenced to SP */
- maxlen=7+strlen(Name);
- Local[i++] = maxlen;
- Local[i++]=spnt->VMS_type;
- if(Offset > 0) Local[i++] = DBG$C_FUNCTION_PARAMETER;
- else Local[i++] = DBG$C_LOCAL_SYM;
- pnt=(char*) &Offset;
- for(j=0;j<4;j++) Local[i++]=*pnt++; /* copy the offset */
- } else {
- maxlen=7+strlen(Name); /* symbols fixed in memory */
- Local[i++]=7+strlen(Name);
- Local[i++]=spnt->VMS_type;
- Local[i++]=1;
- VMS_Store_Immediate_Data(Local, i, OBJ$C_DBG); i=0;
- VMS_Set_Data(Psect,Offset,OBJ$C_DBG,0);
- }
- Local[i++]=strlen(Name);
- pnt=Name;
- fix_name(pnt); /* if there are bad characters in name, convert them */
- while(*pnt!='\0') Local[i++]=*pnt++;
- VMS_Store_Immediate_Data(Local, i, OBJ$C_DBG);
- if(spnt->VMS_type == DBG$C_ADVANCED_TYPE) generate_suffix(spnt,0);
-}
-
-
-/* This routine parses the stabs entries in order to make the definition
- * for the debugger of local symbols and function parameters
- */
-int VMS_local_stab_Parse(symbolS * sp){
- char *pnt;
- char *pnt1;
- char *str;
- struct VMS_DBG_Symbol* spnt;
- struct VMS_Symbol * vsp;
- int dbx_type;
- int VMS_type;
- dbx_type=0;
- str=sp->sy_nlist.n_un.n_name;
- pnt=(char*) strchr(str,':');
- if(pnt==(char*) NULL) return; /* no colon present */
- pnt1=pnt++; /* save this for later, and skip colon */
- if(*pnt == 'c') return 0; /* ignore static constants */
- /* there is one little catch that we must be aware of. Sometimes function
- * parameters are optimized into registers, and the compiler, in its infiite
- * wisdom outputs stabs records for *both*. In general we want to use the
- * register if it is present, so we must search the rest of the symbols for
- * this function to see if this parameter is assigned to a register.
- */
-{
- char *str1;
- char *pnt2;
- symbolS * sp1;
- if(*pnt == 'p'){
- for(sp1 = symbol_next(sp); sp1; sp1 = symbol_next(sp1)) {
- if ((sp1->sy_nlist.n_type & N_STAB) == 0) continue;
- if((unsigned char)sp1->sy_nlist.n_type == N_FUN) break;
- if((unsigned char)sp1->sy_nlist.n_type != N_RSYM) continue;
- str1=sp1->sy_nlist.n_un.n_name; /* and get the name */
- pnt2=str;
- while(*pnt2 != ':') {
- if(*pnt2 != *str1) break;
- pnt2++; str1++;};
- if((*str1 != ':') || (*pnt2 != ':') ) continue;
- return; /* they are the same! lets skip this one */
- }; /* for */
- /* first find the dbx symbol type from list, and then find VMS type */
- pnt++; /* skip p in case no register */
- };/* if */ }; /* p block */
-pnt = cvt_integer( pnt, &dbx_type);
-spnt = find_symbol(dbx_type);
-if(spnt==(struct VMS_DBG_Symbol*) NULL) return 0;/*Dunno what this is*/
- *pnt1='\0';
- VMS_DBG_record(spnt,-1,sp->sy_nlist.n_value,str);
- *pnt1=':'; /* and restore the string */
- return 1;
-}
-
-/* this routine parses a stabs entry to find the information required to define
- * a variable. It is used for global and static variables.
- * Basically we need to know the address of the symbol. With older versions
- * of the compiler, const symbols are
- * treated differently, in that if they are global they are written into the
- * text psect. The global symbol entry for such a const is actually written
- * as a program entry point (Yuk!!), so if we cannot find a symbol in the list
- * of psects, we must search the entry points as well. static consts are even
- * harder, since they are never assigned a memory address. The compiler passes
- * a stab to tell us the value, but I am not sure what to do with it.
- */
-static gave_compiler_message = 0;
-
-static int VMS_stab_parse(symbolS * sp,char expected_type,
- int type1,int type2,int Text_Psect){
- char *pnt;
- char *pnt1;
- char *str;
- symbolS * sp1;
- struct VMS_DBG_Symbol* spnt;
- struct VMS_Symbol * vsp;
- int dbx_type;
- int VMS_type;
- dbx_type=0;
- str=sp->sy_nlist.n_un.n_name;
- pnt=(char*) strchr(str,':');
- if(pnt==(char*) NULL) return; /* no colon present */
- pnt1=pnt; /* save this for later*/
- pnt++;
- if(*pnt==expected_type){
- pnt = cvt_integer(pnt+1,&dbx_type);
- spnt = find_symbol(dbx_type);
- if(spnt==(struct VMS_DBG_Symbol*) NULL) return 0;/*Dunno what this is*/
- /* now we need to search the symbol table to find the psect and offset for
- * this variable.
- */
- *pnt1='\0';
- vsp=VMS_Symbols;
- while(vsp != (struct VMS_Symbol*) NULL)
- {pnt=vsp->Symbol->sy_nlist.n_un.n_name;
- if(pnt!=(char*) NULL) if(*pnt++ == '_')
- /* make sure name is the same, and make sure correct symbol type */
- if((strlen(pnt) == strlen(str)) && (strcmp(pnt,str)==0)
- && ((vsp->Symbol->sy_type == type1) ||
- (vsp->Symbol->sy_type == type2))) break;
- vsp=vsp->Next;};
- if(vsp != (struct VMS_Symbol*) NULL){
- VMS_DBG_record(spnt,vsp->Psect_Index,vsp->Psect_Offset,str);
- *pnt1=':'; /* and restore the string */
- return 1;};
- /* the symbol was not in the symbol list, but it may be an "entry point"
- if it was a constant */
- for(sp1 = symbol_rootP; sp1; sp1 = symbol_next(sp1)) {
- /*
- * Dispatch on STAB type
- */
- if(sp1->sy_type != (N_TEXT | N_EXT) && sp1->sy_type!=N_TEXT)
- continue;
- pnt = sp1->sy_nlist.n_un.n_name;
- if(*pnt == '_') pnt++;
- if(strcmp(pnt,str) == 0){
- if(!gave_compiler_message && expected_type=='G'){
- printf("***Warning - the assembly code generated by the compiler has placed\n");
- printf("global constant(s) in the text psect. These will not be available to\n");
- printf("other modules, since this is not the correct way to handle this. You\n");
- printf("have two options: 1) get a patched compiler that does not put global\n");
- printf("constants in the text psect, or 2) remove the 'const' keyword from\n");
- printf("definitions of global variables in your source module(s). Don't say\n");
- printf("I didn't warn you!");
- gave_compiler_message = 1;};
- VMS_DBG_record(spnt,
- Text_Psect,
- sp1->sy_nlist.n_value,
- str);
- *pnt1=':';
- *(sp1->sy_nlist.n_un.n_name) = 'L';
- /* fool assembler to not output this
- * as a routine in the TBT */
- return 1;};
- };
- };
- *pnt1=':'; /* and restore the string */
- return 0;
-}
-
-
-VMS_GSYM_Parse(symbolS * sp,int Text_Psect){ /* Global variables */
- VMS_stab_parse(sp,'G',(N_UNDF | N_EXT),(N_DATA | N_EXT),Text_Psect);
-}
-
-
-VMS_LCSYM_Parse(symbolS * sp,int Text_Psect){/* Static symbols - uninitialized */
- VMS_stab_parse(sp,'S',N_BSS,-1,Text_Psect);
-}
-
-VMS_STSYM_Parse(symbolS * sp,int Text_Psect){ /*Static symbols - initialized */
- VMS_stab_parse(sp,'S',N_DATA,-1,Text_Psect);
-}
-
-
-/* for register symbols, we must figure out what range of addresses within the
- * psect are valid. We will use the brackets in the stab directives to give us
- * guidance as to the PC range that this variable is in scope. I am still not
- * completely comfortable with this but as I learn more, I seem to get a better
- * handle on what is going on.
- * Caveat Emptor.
- */
-VMS_RSYM_Parse(symbolS * sp,symbolS * Current_Routine,int Text_Psect){
- char* pnt;
- char* pnt1;
- char* str;
- int dbx_type;
- struct VMS_DBG_Symbol* spnt;
- int j;
- int maxlen;
- int i=0;
- int bcnt=0;
- int Min_Offset=-1; /* min PC of validity */
- int Max_Offset=0; /* max PC of validity */
- symbolS * symbolP;
- for(symbolP = sp; symbolP; symbolP = symbol_next(symbolP)) {
- /*
- * Dispatch on STAB type
- */
- switch((unsigned char)symbolP->sy_type) {
- case N_LBRAC:
- if(bcnt++==0) Min_Offset = symbolP->sy_nlist.n_value;
- break;
- case N_RBRAC:
- if(--bcnt==0) Max_Offset =
- symbolP->sy_nlist.n_value-1;
- break;
- }
- if((Min_Offset != -1) && (bcnt == 0)) break;
- if((unsigned char)symbolP->sy_type == N_FUN) break;
- }
- /* check to see that the addresses were defined. If not, then there were no
- * brackets in the function, and we must try to search for the next function
- * Since functions can be in any order, we should search all of the symbol list
- * to find the correct ending address. */
- if(Min_Offset == -1){
- int Max_Source_Offset;
- int This_Offset;
- Min_Offset = sp->sy_nlist.n_value;
- for(symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
- /*
- * Dispatch on STAB type
- */
- This_Offset = symbolP->sy_nlist.n_value;
- switch(symbolP->sy_type) {
- case N_TEXT | N_EXT:
- if((This_Offset > Min_Offset) && (This_Offset < Max_Offset))
- Max_Offset = This_Offset;
- break;
- case N_SLINE:
- if(This_Offset > Max_Source_Offset)
- Max_Source_Offset=This_Offset;
- }
- }
- /* if this is the last routine, then we use the PC of the last source line
- * as a marker of the max PC for which this reg is valid */
- if(Max_Offset == 0x7fffffff) Max_Offset = Max_Source_Offset;
- };
- dbx_type=0;
- str=sp->sy_nlist.n_un.n_name;
- pnt=(char*) strchr(str,':');
- if(pnt==(char*) NULL) return; /* no colon present */
- pnt1=pnt; /* save this for later*/
- pnt++;
- if(*pnt!='r') return 0;
- pnt = cvt_integer( pnt+1, &dbx_type);
- spnt = find_symbol(dbx_type);
- if(spnt==(struct VMS_DBG_Symbol*) NULL) return 0;/*Dunno what this is yet*/
- *pnt1='\0';
- maxlen=25+strlen(sp->sy_nlist.n_un.n_name);
- Local[i++]=maxlen;
- Local[i++]=spnt->VMS_type;
- Local[i++]=0xfb;
- Local[i++]=strlen(sp->sy_nlist.n_un.n_name)+1;
- Local[i++]=0x00;
- Local[i++]=0x00;
- Local[i++]=0x00;
- Local[i++]=strlen(sp->sy_nlist.n_un.n_name);
- pnt=sp->sy_nlist.n_un.n_name;
- fix_name(pnt); /* if there are bad characters in name, convert them */
- while(*pnt!='\0') Local[i++]=*pnt++;
- Local[i++]=0xfd;
- Local[i++]=0x0f;
- Local[i++]=0x00;
- Local[i++]=0x03;
- Local[i++]=0x01;
- VMS_Store_Immediate_Data(Local, i, OBJ$C_DBG); i=0;
- VMS_Set_Data(Text_Psect,Min_Offset,OBJ$C_DBG,1);
- VMS_Set_Data(Text_Psect,Max_Offset,OBJ$C_DBG,1);
- Local[i++]=0x03;
- Local[i++]=sp->sy_nlist.n_value;
- Local[i++]=0x00;
- Local[i++]=0x00;
- Local[i++]=0x00;
- VMS_Store_Immediate_Data(Local, i, OBJ$C_DBG);
- *pnt1=':';
- if(spnt->VMS_type == DBG$C_ADVANCED_TYPE) generate_suffix(spnt,0);
-}
-
-/* this function examines a structure definition, checking all of the elements
- * to make sure that all of them are fully defined. The only thing that we
- * kick out are arrays of undefined structs, since we do not know how big
- * they are. All others we can handle with a normal forward reference.
- */
-static int forward_reference(char* pnt){
- int i;
- struct VMS_DBG_Symbol * spnt;
- struct VMS_DBG_Symbol * spnt1;
- pnt = cvt_integer(pnt+1,&i);
- if(*pnt == ';') return 0; /* no forward references */
- do{
- pnt=(char*) strchr(pnt,':');
- pnt = cvt_integer(pnt+1,&i);
- spnt = find_symbol(i);
- if(spnt == (struct VMS_DBG_Symbol*) NULL) return 0;
- while((spnt->advanced == POINTER) || (spnt->advanced == ARRAY)){
- i=spnt->type2;
- spnt1 = find_symbol(spnt->type2);
- if((spnt->advanced == ARRAY) &&
- (spnt1 == (struct VMS_DBG_Symbol*) NULL))return 1;
- if(spnt1 == (struct VMS_DBG_Symbol*) NULL) break;
- spnt=spnt1;
- };
- pnt = cvt_integer(pnt+1,&i);
- pnt = cvt_integer(pnt+1,&i);
- }while(*++pnt != ';');
- return 0; /* no forward refences found */
-}
-
-/* This routine parses the stabs directives to find any definitions of dbx type
- * numbers. It makes a note of all of them, creating a structure element
- * of VMS_DBG_Symbol that describes it. This also generates the info for the
- * debugger that describes the struct/union/enum, so that further references
- * to these data types will be by number
- * We have to process pointers right away, since there can be references
- * to them later in the same stabs directive. We cannot have forward
- * references to pointers, (but we can have a forward reference to a pointer to
- * a structure/enum/union) and this is why we process them immediately.
- * After we process the pointer, then we search for defs that are nested even
- * deeper.
- */
-static int VMS_typedef_parse(char* str){
- char* pnt;
- char* pnt1;
- char* pnt2;
- int i;
- int dtype;
- struct forward_ref * fpnt;
- int i1,i2,i3;
- int convert_integer;
- struct VMS_DBG_Symbol* spnt;
- struct VMS_DBG_Symbol* spnt1;
- /* check for any nested def's */
- pnt=(char*)strchr(str+1,'=');
- if((pnt != (char*) NULL) && (*(str+1) != '*'))
- if(VMS_typedef_parse(pnt) == 1 ) return 1;
- /* now find dbx_type of entry */
- pnt=str-1;
- if(*pnt == 'c'){ /* check for static constants */
- *str = '\0'; /* for now we ignore them */
- return 0;};
- while((*pnt <= '9')&& (*pnt >= '0')) pnt--;
- pnt++; /* and get back to the number */
- cvt_integer(pnt,&i1);
- spnt = find_symbol(i1);
- /* first we see if this has been defined already, due to a forward reference*/
- if(spnt == (struct VMS_DBG_Symbol*) NULL) {
- if(VMS_Symbol_type_list==(struct VMS_DBG_Symbol*) NULL)
- {spnt=(struct VMS_DBG_Symbol*) malloc(sizeof(struct VMS_DBG_Symbol));
- spnt->next = (struct VMS_DBG_Symbol*) NULL;
- VMS_Symbol_type_list=spnt;}
- else
- {spnt=(struct VMS_DBG_Symbol*) malloc(sizeof(struct VMS_DBG_Symbol));
- spnt->next=VMS_Symbol_type_list;
- VMS_Symbol_type_list = spnt;};
- spnt->dbx_type = i1; /* and save the type */
- };
- /* for structs and unions, do a partial parse, otherwise we sometimes get
- * circular definitions that are impossible to resolve. We read enough info
- * so that any reference to this type has enough info to be resolved
- */
- pnt=str + 1; /* point to character past equal sign */
- if((*pnt == 'u') || (*pnt == 's')){
- };
- if((*pnt <= '9') && (*pnt >= '0')){
- if(type_check("void")){ /* this is the void symbol */
- *str='\0';
- spnt->advanced = VOID;
- return 0;};
- printf("gcc-as warning(debugger output):");
- printf(" %d is an unknown untyped variable.\n",spnt->dbx_type);
- return 1; /* do not know what this is */
- };
- /* now define this module*/
- pnt=str + 1; /* point to character past equal sign */
- switch (*pnt){
- case 'r':
- spnt->advanced= BASIC;
- if(type_check("int")) {
- spnt->VMS_type=DBG$C_SLINT; spnt->data_size=4;}
- else if(type_check("long int")) {
- spnt->VMS_type=DBG$C_SLINT; spnt->data_size=4;}
- else if(type_check("unsigned int")) {
- spnt->VMS_type=DBG$C_ULINT; spnt->data_size = 4;}
- else if(type_check("long unsigned int")) {
- spnt->VMS_type=DBG$C_ULINT; spnt->data_size = 4;}
- else if(type_check("short int")) {
- spnt->VMS_type=DBG$C_SSINT; spnt->data_size = 2;}
- else if(type_check("short unsigned int")) {
- spnt->VMS_type=DBG$C_USINT; spnt->data_size = 2;}
- else if(type_check("char")) {
- spnt->VMS_type=DBG$C_SCHAR; spnt->data_size = 1;}
- else if(type_check("signed char")) {
- spnt->VMS_type=DBG$C_SCHAR; spnt->data_size = 1;}
- else if(type_check("unsigned char")) {
- spnt->VMS_type=DBG$C_UCHAR; spnt->data_size = 1;}
- else if(type_check("float")) {
- spnt->VMS_type=DBG$C_REAL4; spnt->data_size = 4;}
- else if(type_check("double")) {
- spnt->VMS_type=DBG$C_REAL8; spnt->data_size = 8;}
- pnt1=(char*) strchr(str,';')+1;
- break;
- case 's':
- case 'u':
- if(*pnt == 's') spnt->advanced= STRUCT;
- else spnt->advanced= UNION;
- spnt->VMS_type = DBG$C_ADVANCED_TYPE;
- pnt1 = cvt_integer(pnt+1,&spnt->data_size);
- if(forward_reference(pnt)) {
- spnt->struc_numb = -1;
- return 1;
- }
- spnt->struc_numb = ++structure_count;
- pnt1--;
- pnt=get_struct_name(str);
- VMS_Def_Struct(spnt->struc_numb);
- fpnt = f_ref_root;
- while(fpnt != (struct forward_ref*) NULL){
- if(fpnt->dbx_type == spnt->dbx_type) {
- fpnt->resolved = 'Y';
- VMS_Set_Struct(fpnt->struc_numb);
- VMS_Store_Struct(spnt->struc_numb);};
- fpnt = fpnt->next;};
- VMS_Set_Struct(spnt->struc_numb);
- i=0;
- Local[i++] = 11+strlen(pnt);
- Local[i++] = DBG$C_STRUCT_START;
- Local[i++] = 0x80;
- for(i1=0;i1<4;i1++) Local[i++] = 0x00;
- Local[i++] = strlen(pnt);
- pnt2=pnt;
- while(*pnt2 != '\0') Local[i++] = *pnt2++;
- i2=spnt->data_size * 8; /* number of bits */
- pnt2=(char*) &i2;
- for(i1=0;i1<4;i1++) Local[i++] = *pnt2++;
- VMS_Store_Immediate_Data(Local, i, OBJ$C_DBG); i=0;
- if(pnt != symbol_name) {
- pnt += strlen(pnt);
- *pnt=':';}; /* replace colon for later */
- while(*++pnt1 != ';'){
- pnt=(char*) strchr(pnt1,':');
- *pnt='\0';
- pnt2=pnt1;
- pnt1 = cvt_integer(pnt+1,&dtype);
- pnt1 = cvt_integer(pnt1+1,&i2);
- pnt1 = cvt_integer(pnt1+1,&i3);
- if((dtype == 1) && (i3 != 32)) { /* bitfield */
- Apoint = 0;
- push(19+strlen(pnt2),1);
- push(0xfa22,2);
- push(1+strlen(pnt2),4);
- push(strlen(pnt2),1);
- while(*pnt2 != '\0') push(*pnt2++,1);
- push(i3,2); /* size of bitfield */
- push(0x0d22,2);
- push(0x00,4);
- push(i2,4); /* start position */
- VMS_Store_Immediate_Data(Asuffix,Apoint,OBJ$C_DBG);
- Apoint=0;
- }else{
- Local[i++] = 7+strlen(pnt2);
- spnt1 = find_symbol(dtype);
- /* check if this is a forward reference */
- if(spnt1 != (struct VMS_DBG_Symbol*) NULL)
- Local[i++] = spnt1->VMS_type;
- else
- Local[i++] = DBG$C_ADVANCED_TYPE;
- Local[i++] = DBG$C_STRUCT_ITEM;
- pnt=(char*) &i2;
- for(i1=0;i1<4;i1++) Local[i++] = *pnt++;
- Local[i++] = strlen(pnt2);
- while(*pnt2 != '\0') Local[i++] = *pnt2++;
- VMS_Store_Immediate_Data(Local, i, OBJ$C_DBG); i=0;
- if(spnt1 == (struct VMS_DBG_Symbol*) NULL)
- generate_suffix(spnt1,dtype);
- else if(spnt1->VMS_type == DBG$C_ADVANCED_TYPE)
- generate_suffix(spnt1,0);
- };
- };
- pnt1++;
- Local[i++] = 0x01; /* length byte */
- Local[i++] = DBG$C_STRUCT_END;
- VMS_Store_Immediate_Data(Local, i, OBJ$C_DBG); i=0;
- break;
- case 'e':
- spnt->advanced= ENUM;
- spnt->VMS_type = DBG$C_ADVANCED_TYPE;
- spnt->struc_numb = ++structure_count;
- spnt->data_size=4;
- VMS_Def_Struct(spnt->struc_numb);
- fpnt = f_ref_root;
- while(fpnt != (struct forward_ref*) NULL){
- if(fpnt->dbx_type == spnt->dbx_type) {
- fpnt->resolved = 'Y';
- VMS_Set_Struct(fpnt->struc_numb);
- VMS_Store_Struct(spnt->struc_numb);};
- fpnt = fpnt->next;};
- VMS_Set_Struct(spnt->struc_numb);
- i=0;
- Local[i++] = 3+strlen(symbol_name);
- Local[i++] = DBG$C_ENUM_START;
- Local[i++] = 0x20;
- Local[i++] = strlen(symbol_name);
- pnt2=symbol_name;
- while(*pnt2 != '\0') Local[i++] = *pnt2++;
- VMS_Store_Immediate_Data(Local, i, OBJ$C_DBG); i=0;
- while(*++pnt != ';') {
- pnt1=(char*) strchr(pnt,':');
- *pnt1++='\0';
- pnt1 = cvt_integer(pnt1,&i1);
- Local[i++] = 7+strlen(pnt);
- Local[i++] = DBG$C_ENUM_ITEM;
- Local[i++] = 0x00;
- pnt2=(char*) &i1;
- for(i2=0;i2<4;i2++) Local[i++] = *pnt2++;
- Local[i++] = strlen(pnt);
- pnt2=pnt;
- while(*pnt != '\0') Local[i++] = *pnt++;
- VMS_Store_Immediate_Data(Local, i, OBJ$C_DBG); i=0;
- pnt= pnt1; /* Skip final semicolon */
- };
- Local[i++] = 0x01; /* len byte */
- Local[i++] = DBG$C_ENUM_END;
- VMS_Store_Immediate_Data(Local, i, OBJ$C_DBG); i=0;
- pnt1=pnt + 1;
- break;
- case 'a':
- spnt->advanced= ARRAY;
- spnt->VMS_type = DBG$C_ADVANCED_TYPE;
- pnt=(char*)strchr(pnt,';'); if (pnt == (char*) NULL) return 1;
- pnt1 = cvt_integer(pnt+1,&spnt->index_min);
- pnt1 = cvt_integer(pnt1+1,&spnt->index_max);
- pnt1 = cvt_integer(pnt1+1,&spnt->type2);
- break;
- case 'f':
- spnt->advanced= FUNCTION;
- spnt->VMS_type = DBG$C_FUNCTION_ADDR;
- /* this masquerades as a basic type*/
- spnt->data_size=4;
- pnt1 = cvt_integer(pnt+1,&spnt->type2);
- break;
- case '*':
- spnt->advanced= POINTER;
- spnt->VMS_type = DBG$C_ADVANCED_TYPE;
- spnt->data_size=4;
- pnt1 = cvt_integer(pnt+1,&spnt->type2);
- pnt=(char*)strchr(str+1,'=');
- if((pnt != (char*) NULL))
- if(VMS_typedef_parse(pnt) == 1 ) return 1;
- break;
- default:
- spnt->advanced= UNKNOWN;
- spnt->VMS_type = 0;
- printf("gcc-as warning(debugger output):");
- printf(" %d is an unknown type of variable.\n",spnt->dbx_type);
- return 1; /* unable to decipher */
- };
- /* this removes the evidence of the definition so that the outer levels of
- parsing do not have to worry about it */
- pnt=str;
- while (*pnt1 != '\0') *pnt++ = *pnt1++;
- *pnt = '\0';
- return 0;
-}
-
-
-/*
- * This is the root routine that parses the stabs entries for definitions.
- * it calls VMS_typedef_parse, which can in turn call itself.
- * We need to be careful, since sometimes there are forward references to
- * other symbol types, and these cannot be resolved until we have completed
- * the parse.
- */
-int VMS_LSYM_Parse(){
- char *pnt;
- char *pnt1;
- char *pnt2;
- char *str;
- char fixit[10];
- int incomplete,i,pass,incom1;
- struct VMS_DBG_Symbol* spnt;
- struct VMS_Symbol * vsp;
- struct forward_ref * fpnt;
- symbolS * sp;
- pass=0;
- incomplete = 0;
- do{
- incom1=incomplete;
- incomplete = 0;
- for(sp = symbol_rootP; sp; sp = symbol_next(sp)) {
- /*
- * Deal with STAB symbols
- */
- if ((sp->sy_nlist.n_type & N_STAB) != 0) {
- /*
- * Dispatch on STAB type
- */
- switch((unsigned char)sp->sy_nlist.n_type) {
- case N_GSYM:
- case N_LCSYM:
- case N_STSYM:
- case N_PSYM:
- case N_RSYM:
- case N_LSYM:
- case N_FUN: /*sometimes these contain typedefs*/
- str=sp->sy_nlist.n_un.n_name;
- symbol_name = str;
- pnt=(char*)strchr(str,':');
- if(pnt== (char*) NULL) break;
- *pnt='\0';
- pnt1=pnt+1;
- pnt2=(char*)strchr(pnt1,'=');
- if(pnt2 == (char*) NULL){
- *pnt=':'; /* replace colon */
- break;}; /* no symbol here */
- incomplete += VMS_typedef_parse(pnt2);
- *pnt=':'; /* put back colon so variable def code finds dbx_type*/
- break;
- } /*switch*/
- } /* if */
- } /*for*/
- pass++;
- } while((incomplete != 0) && (incomplete != incom1 ));
- /* repeat until all refs resolved if possible */
- /* if(pass > 1) printf(" Required %d passes\n",pass);*/
- if(incomplete != 0){
- printf("gcc-as warning(debugger output):");
- printf("Unable to resolve %d circular references.\n",incomplete);
- };
- fpnt = f_ref_root;
- symbol_name="\0";
- while(fpnt != (struct forward_ref*) NULL){
- if(fpnt->resolved != 'Y') {
- if( find_symbol(fpnt->dbx_type) !=
- (struct VMS_DBG_Symbol*) NULL){
- printf("gcc-as warning(debugger output):");
- printf("Forward reference error, dbx type %d\n",
- fpnt->dbx_type);
- break;};
- fixit[0]=0;
- sprintf(&fixit[1],"%d=s4;",fpnt->dbx_type);
- pnt2=(char*)strchr(&fixit[1],'=');
- VMS_typedef_parse(pnt2);
- };
- fpnt = fpnt->next;};
-}
-
-static symbolS* Current_Routine;
-static int Text_Psect;
-
-static Define_Local_Symbols(symbolS* s1,symbolS* s2){
- symbolS * symbolP1;
- for(symbolP1 = symbol_next(s1); symbolP1 != s2; symbolP1 = symbol_next(symbolP1)) {
- if (symbolP1 == (symbolS *)NULL) return;
- if (symbolP1->sy_nlist.n_type == N_FUN) return;
- /*
- * Deal with STAB symbols
- */
- if ((symbolP1->sy_nlist.n_type & N_STAB) != 0) {
- /*
- * Dispatch on STAB type
- */
- switch((unsigned char)symbolP1->sy_nlist.n_type) {
- case N_LSYM:
- case N_PSYM:
- VMS_local_stab_Parse(symbolP1);
- break;
- case N_RSYM:
- VMS_RSYM_Parse(symbolP1,Current_Routine,Text_Psect);
- break;
- } /*switch*/
- } /* if */
- } /* for */
-}
-
-static symbolS* Define_Routine(symbolS* symbolP,int Level){
- symbolS * sstart;
- symbolS * symbolP1;
- char str[10];
- char * pnt;
- int rcount = 0;
- int Offset;
- sstart = symbolP;
- for(symbolP1 = symbol_next(symbolP); symbolP1; symbolP1 = symbol_next(symbolP1)) {
- if (symbolP1->sy_nlist.n_type == N_FUN) break;
- /*
- * Deal with STAB symbols
- */
- if ((symbolP1->sy_nlist.n_type & N_STAB) != 0) {
- /*
- * Dispatch on STAB type
- */
- if((unsigned char)symbolP1->sy_nlist.n_type == N_FUN) break;
- switch((unsigned char)symbolP1->sy_nlist.n_type) {
- case N_LBRAC:
- if(Level != 0) {
- pnt = str +sprintf(str,"$%d",rcount++);
- *pnt = '\0';
- VMS_TBT_Block_Begin(symbolP1,Text_Psect,str);
- };
- Offset = symbolP1->sy_nlist.n_value;
- Define_Local_Symbols(sstart,symbolP1);
- symbolP1 =
- Define_Routine(symbolP1,Level+1);
- if(Level != 0)
- VMS_TBT_Block_End(symbolP1->sy_nlist.n_value -
- Offset);
- sstart=symbolP1;
- break;
- case N_RBRAC:
- return symbolP1;
- } /*switch*/
- } /* if */
- } /* for */
- /* we end up here if there were no brackets in this function. Define
- everything */
- Define_Local_Symbols(sstart,(symbolS *) 0);
-}
-
-VMS_DBG_Define_Routine(symbolS* symbolP,symbolS* Curr_Routine,int Txt_Psect){
- Current_Routine = Curr_Routine;
- Text_Psect = Txt_Psect;
- Define_Routine(symbolP,0);
-}
-
-/* end of vms-dbg.c */