/* * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands. * See the copyright notice in the ACK home directory, in the file "Copyright". */ #include #include "../../h/em_spec.h" #include "../../h/as_spec.h" #include "../../h/em_flag.h" #include "../../h/arch.h" #include "../../h/local.h" #define RCS_ASS "$Header$" /* * compile time options */ #define DUMP 1 /* dump between passes */ /* #define TIMING 1 /* some timing measurements */ /* #define JOHAN 1 /* dump the loaded instructions */ #define MEMUSE 1 /* print memory usage statistics */ #ifndef DUMP #define dump(x) /* nothing */ #endif #ifndef TIMING #define timing() /* nothing */ #endif #ifndef MEMUSE #define memuse() /* nothing */ #endif /* Used to clear the upper byte(s) of characters. Not nessecary if your C-compiler does not sign-extend char's */ #ifdef CPM # define LC(ch) ( ((ch)<'A' | (ch)>'Z' ) ? (ch) : ((ch)-('A'-'a'))) #else # define LC(ch) (ch) #endif #define ctrunc(val) ( (val)&0377 ) #define odd(n) ((n)&1) /* Boolean odd function */ #define lnp_cast (line_t *) #define gbp_cast (glob_t *) #define lbp_cast (locl_t *) #define prp_cast (proc_t *) #define ptp_cast (ptab_t *) #define rlp_cast (relc_t *) #define pst_cast (stat_t *) #define chp_cast (char *) #define ipp_cast (int **) #define iip_cast (int *) #define int_cast (int ) typedef struct lines line_t; typedef struct loc_label locl_t; typedef struct glob_label glob_t; typedef struct rel relc_t; typedef struct procstat stat_t; typedef struct sizes size_t; typedef struct ar_hdr arch_t; typedef struct procs proc_t; typedef struct proctab ptab_t; typedef char * area_t; typedef long cons_t; typedef union { cons_t ad_i; locl_t *ad_lp; glob_t *ad_gp; proc_t *ad_pp; struct sad_ln { short ln_extra; short ln_first; } ad_ln ; struct sad_df { cons_t df_i; glob_t *df_gp; } ad_df; } addr_u; typedef union { cons_t rel_i; locl_t *rel_lp; glob_t *rel_gp; } rel_u; #define FOFFSET long /* offset into file */ /* * Global variables and definitions for EM1-assembler/loader */ #define DEFINING 0 /* parameters for glolookup */ #define OCCURRING 1 #define INTERNING 2 #define EXTERNING 3 #define SEARCHING 4 #define ENTERING 5 #define PRO_OCC 0 /* parameters for prolookup */ #define PRO_DEF 1 #define PRO_INT 2 #define PRO_EXT 3 #define TRUE 1 #define FALSE 0 #define MAXBYTE 255 #define MAXSTRING 200 /* Maximum string length accepted */ #define LOCLABSIZE 128 /* size of local label hash table */ /* may not be smaller */ #define ABSSIZE 8 struct lines { char instr_num; /* index into mnemon[] */ char type1; /* see below */ line_t *l_next; /* next in chain */ char *opoff; /* pointer into opchoice[] */ addr_u ad; /* depending on type, various pointers */ }; /* contents of type1 */ #define MISSING 0 /* no operand */ #define CONST 1 /* ad contains operand */ #define PROCNAME 2 /* ad contains struct procs pointer */ #define GLOSYM 3 /* ad contains pointer into mproc[] */ #define LOCSYM 4 /* ad contains pointer into locs[] */ #define GLOOFF 5 /* ad contains CONST and GLOSYM in ad_df */ #define LINES 6 /* Line number setting, only param of pseudo*/ #define VALLOW 7 /* value's between LOW and HIGH are x-MID */ #define VALMID 50 #define VALHIGH 127 /* to avoid sign extension problems */ #define VAL1(x) ((x)-VALMID) /* Used to indicate a invalid contents of opoff */ #define NO_OFF ((char *)-1) /* The structure containing procedure pertinent data */ /* Used for environment stacking for nested PRO's */ struct procstat { line_t *s_fline; /* points to first line of procedure */ locl_t (*s_locl)[]; /* pointer to local labels */ proc_t *s_curpro; /* identifies current procedure */ relc_t *s_fdata; /* last datareloc before procedure */ stat_t *s_prevstat; /* backward chain of nested procedures */ } ; struct loc_label { locl_t *l_chain; /* The next label with same low order bits */ char l_hinum; /* high bits of number of label */ char l_defined; /* see below */ int l_min,l_max; /* boundaries of value */ }; /* contents of l_defined */ #define EMPTY 0 /* Empty slot */ #define NO 1 /* not defined yet */ #define YES 2 /* defined */ #define SEEN 3 /* intermediate state */ #define NOTPRESENT 4 /* Undefined and error message given */ struct glob_label { char *g_name; char g_status; /* see below */ union { cons_t g_addr; /* value if status&DEF */ struct glob_label *g_gp; /* ref. to xglobs */ } g_val ; }; #define glostring(gl) ((gl)->g_name) /* contents of g_status */ #define DEF 01 /* defined */ #define OCC 02 /* used */ #define EXT 04 /* external */ struct rel { /* for relocation tables */ relc_t *r_next; /* chain */ FOFFSET r_off; /* offset in text/data of word to relocate */ rel_u r_val; /* constant or pointer to global symbol */ int r_typ; /* different use in text or data */ }; /* * When used with textrelocation r_typ contains the flag bits as defined * in ip_spec.h together with the RELMNS bit if r_val contains an integer */ #define RELMNS 020000 /* indicates integer i.s.o. glob */ /* Contents of r_typ when used with data relocation */ #define RELNULL 0 #define RELGLO 1 #define RELHEAD 2 #define RELLOC 3 #define RELADR 4 /* modes of data output */ #define DATA_NUL 0 #define DATA_REP 1 #define DATA_CONST 2 #define DATA_BSS 3 #define DATA_DPTR 4 #define DATA_IPTR 5 #define DATA_ICON 6 #define DATA_UCON 7 #define DATA_FCON 8 #define DATA_BYTES 9 /* name of procedure to be called first */ #define MAIN "m_a_i_n" /* headers of datablocks written */ #define HEADREP 0 #define HEADBSS 1 #define HEADBYTE 2 #define HEADCONST 3 #define HEADDPTR 4 #define HEADIPTR 5 #define HEADICON 6 #define HEADUCON 7 #define HEADFCON 8 #define NDEFAULT 4 /* number of different sizes available */ struct sizes { int n_mlab; /* # of global labels per module */ int n_glab; /* # of extern global labels */ int n_mproc; /* # of local procs per module */ int n_xproc; /* # of external procs */ int n_proc; /* total # of procedures */ }; struct procs { /* format of mprocs[] and xprocs[] */ char *p_name; char p_status; /* same bits as g_status except REL */ int p_num; /* unique procedure descriptor */ }; struct proctab { cons_t pr_off; /* distance from pb */ cons_t pr_loc; /* number of bytes locals */ };