diff options
Diffstat (limited to 'gnu/usr.bin/gas/config/tc-ns32k.c')
| -rw-r--r-- | gnu/usr.bin/gas/config/tc-ns32k.c | 2017 |
1 files changed, 0 insertions, 2017 deletions
diff --git a/gnu/usr.bin/gas/config/tc-ns32k.c b/gnu/usr.bin/gas/config/tc-ns32k.c deleted file mode 100644 index 3bea2abcf85..00000000000 --- a/gnu/usr.bin/gas/config/tc-ns32k.c +++ /dev/null @@ -1,2017 +0,0 @@ -/* $OpenBSD: tc-ns32k.c,v 1.4 1996/06/17 00:24:07 deraadt Exp $ */ - -/* ns32k.c -- Assemble on the National Semiconductor 32k series - 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. */ - -/*#define SHOW_NUM 1*/ /* uncomment for debugging */ - -#include <stdio.h> -#include <ctype.h> -#ifdef USG -#include <string.h> -#else -#include <strings.h> -#endif -#include "opcode/ns32k.h" - -#include "as.h" - -#include "obstack.h" - -/* Macros */ -#define IIF_ENTRIES 13 /* number of entries in iif */ -#define PRIVATE_SIZE 256 /* size of my garbage memory */ -#define MAX_ARGS 4 -#define DEFAULT -1 /* addr_mode returns this value when plain constant or label is encountered */ - -#define IIF(ptr,a1,c1,e1,g1,i1,k1,m1,o1,q1,s1,u1) \ - iif.iifP[ptr].type= a1; \ - iif.iifP[ptr].size= c1; \ - iif.iifP[ptr].object= e1; \ - iif.iifP[ptr].object_adjust= g1; \ - iif.iifP[ptr].pcrel= i1; \ - iif.iifP[ptr].pcrel_adjust= k1; \ - iif.iifP[ptr].im_disp= m1; \ - iif.iifP[ptr].relax_substate= o1; \ - iif.iifP[ptr].bit_fixP= q1; \ - iif.iifP[ptr].addr_mode= s1; \ - iif.iifP[ptr].bsr= u1; - -#ifdef TE_SEQUENT -#define LINE_COMMENT_CHARS "|" -#define ABSOLUTE_PREFIX '@' -#define IMMEDIATE_PREFIX '#' -#endif - -#ifndef LINE_COMMENT_CHARS -#define LINE_COMMENT_CHARS "#" -#endif - -const char comment_chars[] = "#"; -const char line_comment_chars[] = LINE_COMMENT_CHARS; -#if !defined(ABSOLUTE_PREFIX) && !defined(IMMEDIATE_PREFIX) -#define ABSOLUTE_PREFIX '@' /* One or the other MUST be defined */ -#endif - -struct addr_mode { - char mode; /* addressing mode of operand (0-31) */ - char scaled_mode; /* mode combined with scaled mode */ - char scaled_reg; /* register used in scaled+1 (1-8) */ - char float_flag; /* set if R0..R7 was F0..F7 ie a floating-point-register */ - char am_size; /* estimated max size of general addr-mode parts*/ - char im_disp; /* if im_disp == 1 we have a displacement */ - char pcrel; /* 1 if pcrel, this is really redundant info */ - char disp_suffix[2]; /* length of displacement(s), 0=undefined */ - char *disp[2]; /* pointer(s) at displacement(s) - or immediates(s) (ascii) */ - char index_byte; /* index byte */ -}; -typedef struct addr_mode addr_modeS; - - -char *freeptr,*freeptr_static; /* points at some number of free bytes */ -struct hash_control *inst_hash_handle; - -struct ns32k_opcode *desc; /* pointer at description of instruction */ -addr_modeS addr_modeP; -char EXP_CHARS[] = "eE"; -char FLT_CHARS[] = "fd"; /* we don't want to support lowercase, do we */ - -/* UPPERCASE denotes live names - * when an instruction is built, IIF is used as an intermidiate form to store - * the actual parts of the instruction. A ns32k machine instruction can - * be divided into a couple of sub PARTs. When an instruction is assembled - * the appropriate PART get an assignment. When an IIF has been completed it's - * converted to a FRAGment as specified in AS.H */ - -/* internal structs */ -struct option { - char *pattern; - unsigned long or; - unsigned long and; -}; - -typedef struct { - int type; /* how to interpret object */ - int size; /* Estimated max size of object */ - unsigned long object; /* binary data */ - int object_adjust; /* number added to object */ - int pcrel; /* True if object is pcrel */ - int pcrel_adjust; /* length in bytes from the - instruction start to the - displacement */ - int im_disp; /* True if the object is a displacement */ - relax_substateT relax_substate; /* Initial relaxsubstate */ - bit_fixS *bit_fixP; /* Pointer at bit_fix struct */ - int addr_mode; /* What addrmode do we associate with this iif-entry */ - char bsr; /* Sequent hack */ -}iif_entryT; /* Internal Instruction Format */ - -struct int_ins_form { - int instr_size; /* Max size of instruction in bytes. */ - iif_entryT iifP[IIF_ENTRIES + 1]; -}; -struct int_ins_form iif; -expressionS exprP; -char *input_line_pointer; -/* description of the PARTs in IIF - *object[n]: - * 0 total length in bytes of entries in iif - * 1 opcode - * 2 index_byte_a - * 3 index_byte_b - * 4 disp_a_1 - * 5 disp_a_2 - * 6 disp_b_1 - * 7 disp_b_2 - * 8 imm_a - * 9 imm_b - * 10 implied1 - * 11 implied2 - * - * For every entry there is a datalength in bytes. This is stored in size[n]. - * 0, the objectlength is not explicitly given by the instruction - * and the operand is undefined. This is a case for relaxation. - * Reserve 4 bytes for the final object. - * - * 1, the entry contains one byte - * 2, the entry contains two bytes - * 3, the entry contains three bytes - * 4, the entry contains four bytes - * etc - * - * Furthermore, every entry has a data type identifier in type[n]. - * - * 0, the entry is void, ignore it. - * 1, the entry is a binary number. - * 2, the entry is a pointer at an expression. - * Where expression may be as simple as a single '1', - * and as complicated as foo-bar+12, - * foo and bar may be undefined but suffixed by :{b|w|d} to - * control the length of the object. - * - * 3, the entry is a pointer at a bignum struct - * - * - * The low-order-byte coresponds to low physical memory. - * Obviously a FRAGment must be created for each valid disp in PART whose - * datalength is undefined (to bad) . - * The case where just the expression is undefined is less severe and is - * handled by fix. Here the number of bytes in the objectfile is known. - * With this representation we simplify the assembly and separates the - * machine dependent/independent parts in a more clean way (said OE) - */ - -struct option opt1[]= /* restore, exit */ -{ - { "r0", 0x80, 0xff }, - { "r1", 0x40, 0xff }, - { "r2", 0x20, 0xff }, - { "r3", 0x10, 0xff }, - { "r4", 0x08, 0xff }, - { "r5", 0x04, 0xff }, - { "r6", 0x02, 0xff }, - { "r7", 0x01, 0xff }, - { 0 , 0x00, 0xff } -}; -struct option opt2[]= /* save, enter */ -{ - { "r0", 0x01, 0xff }, - { "r1", 0x02, 0xff }, - { "r2", 0x04, 0xff }, - { "r3", 0x08, 0xff }, - { "r4", 0x10, 0xff }, - { "r5", 0x20, 0xff }, - { "r6", 0x40, 0xff }, - { "r7", 0x80, 0xff }, - { 0 , 0x00, 0xff } -}; -struct option opt3[]= /* setcfg */ -{ - { "c", 0x8, 0xff }, - { "m", 0x4, 0xff }, - { "f", 0x2, 0xff }, - { "i", 0x1, 0xff }, - { 0 , 0x0, 0xff } -}; -struct option opt4[]= /* cinv */ -{ - { "a", 0x4, 0xff }, - { "i", 0x2, 0xff }, - { "d", 0x1, 0xff }, - { 0 , 0x0, 0xff } -}; -struct option opt5[]= /* string inst */ -{ - { "b", 0x2, 0xff }, - { "u", 0xc, 0xff }, - { "w", 0x4, 0xff }, - { 0 , 0x0, 0xff } -}; -struct option opt6[]= /* plain reg ext,cvtp etc */ -{ - { "r0", 0x00, 0xff }, - { "r1", 0x01, 0xff }, - { "r2", 0x02, 0xff }, - { "r3", 0x03, 0xff }, - { "r4", 0x04, 0xff }, - { "r5", 0x05, 0xff }, - { "r6", 0x06, 0xff }, - { "r7", 0x07, 0xff }, - { 0 , 0x00, 0xff } -}; - -#if !defined(NS32032) && !defined(NS32532) -#define NS32032 -#endif - -struct option cpureg_532[]= /* lpr spr */ -{ - { "us", 0x0, 0xff }, - { "dcr", 0x1, 0xff }, - { "bpc", 0x2, 0xff }, - { "dsr", 0x3, 0xff }, - { "car", 0x4, 0xff }, - { "fp", 0x8, 0xff }, - { "sp", 0x9, 0xff }, - { "sb", 0xa, 0xff }, - { "usp", 0xb, 0xff }, - { "cfg", 0xc, 0xff }, - { "psr", 0xd, 0xff }, - { "intbase", 0xe, 0xff }, - { "mod", 0xf, 0xff }, - { 0 , 0x00, 0xff } -}; -struct option mmureg_532[]= /* lmr smr */ -{ - { "mcr", 0x9, 0xff }, - { "msr", 0xa, 0xff }, - { "tear", 0xb, 0xff }, - { "ptb0", 0xc, 0xff }, - { "ptb1", 0xd, 0xff }, - { "ivar0", 0xe, 0xff }, - { "ivar1", 0xf, 0xff }, - { 0 , 0x0, 0xff } -}; - -struct option cpureg_032[]= /* lpr spr */ -{ - { "upsr", 0x0, 0xff }, - { "fp", 0x8, 0xff }, - { "sp", 0x9, 0xff }, - { "sb", 0xa, 0xff }, - { "psr", 0xd, 0xff }, - { "intbase", 0xe, 0xff }, - { "mod", 0xf, 0xff }, - { 0 , 0x0, 0xff } -}; -struct option mmureg_032[]= /* lmr smr */ -{ - { "bpr0", 0x0, 0xff }, - { "bpr1", 0x1, 0xff }, - { "pf0", 0x4, 0xff }, - { "pf1", 0x5, 0xff }, - { "sc", 0x8, 0xff }, - { "msr", 0xa, 0xff }, - { "bcnt", 0xb, 0xff }, - { "ptb0", 0xc, 0xff }, - { "ptb1", 0xd, 0xff }, - { "eia", 0xf, 0xff }, - { 0 , 0x0, 0xff } -}; - -#if defined(NS32532) -struct option *cpureg = cpureg_532; -struct option *mmureg = mmureg_532; -#else -struct option *cpureg = cpureg_032; -struct option *mmureg = mmureg_032; -#endif - - -const pseudo_typeS md_pseudo_table[]={ /* so far empty */ - { 0, 0, 0 } -}; - -#define IND(x,y) (((x)<<2)+(y)) - -/* those are index's to relax groups in md_relax_table - ie it must be multiplied by 4 to point at a group start. Viz IND(x,y) - Se function relax_segment in write.c for more info */ - -#define BRANCH 1 -#define PCREL 2 - -/* those are index's to entries in a relax group */ - -#define BYTE 0 -#define WORD 1 -#define DOUBLE 2 -#define UNDEF 3 -/* Those limits are calculated from the displacement start in memory. - The ns32k uses the begining of the instruction as displacement base. - This type of displacements could be handled here by moving the limit window - up or down. I choose to use an internal displacement base-adjust as there - are other routines that must consider this. Also, as we have two various - offset-adjusts in the ns32k (acb versus br/brs/jsr/bcond), two set of limits - would have had to be used. - Now we dont have to think about that. */ - - -const relax_typeS md_relax_table[] = { - { 1, 1, 0, 0 }, - { 1, 1, 0, 0 }, - { 1, 1, 0, 0 }, - { 1, 1, 0, 0 }, - - { (63), (-64), 1, IND(BRANCH,WORD) }, - { (8191), (-8192), 2, IND(BRANCH,DOUBLE) }, - { 0, 0, 4, 0 }, - { 1, 1, 0, 0 } -}; - -/* Array used to test if mode contains displacements. - Value is true if mode contains displacement. */ - -char disp_test[] = { 0,0,0,0,0,0,0,0, - 1,1,1,1,1,1,1,1, - 1,1,1,0,0,1,1,0, - 1,1,1,1,1,1,1,1 }; - -/* Array used to calculate max size of displacements */ - -char disp_size[] = { 4,1,2,0,4 }; - -#ifdef PIC -/* In pic-mode all external pc-relative references are jmpslot - references except references to __GLOBAL_OFFSET_TABLE_. */ -static symbolS *got_symbol; - -/* The size of got-offsets. */ -static int got_offset_size = 2; -#endif - - - -#if __STDC__ == 1 - -static segT evaluate_expr(expressionS *resultP, char *ptr); -static void md_number_to_disp(char *buf, long val, int n); -static void md_number_to_imm(char *buf, long val, int n); - -#else /* not __STDC__ */ - -static segT evaluate_expr(); -static void md_number_to_disp(); -static void md_number_to_imm(); - -#endif /* not __STDC__ */ - -/* Parses a general operand into an addressingmode struct - - in: pointer at operand in ascii form - pointer at addr_mode struct for result - the level of recursion. (always 0 or 1) - - out: data in addr_mode struct - */ -int addr_mode(operand,addr_modeP,recursive_level) -char *operand; -register addr_modeS *addr_modeP; -int recursive_level; -{ - register char *str; - register int i; - register int strl; - register int mode; - int j; - mode = DEFAULT; /* default */ - addr_modeP->scaled_mode=0; /* why not */ - addr_modeP->scaled_reg=0; /* if 0, not scaled index */ - addr_modeP->float_flag=0; - addr_modeP->am_size=0; - addr_modeP->im_disp=0; - addr_modeP->pcrel=0; /* not set in this function */ - addr_modeP->disp_suffix[0]=0; - addr_modeP->disp_suffix[1]=0; - addr_modeP->disp[0]=NULL; - addr_modeP->disp[1]=NULL; - str=operand; - if (str[0] == 0) {return (0);} /* we don't want this */ - strl=strlen(str); - switch (str[0]) { - /* the following three case statements controls the mode-chars - this is the place to ed if you want to change them */ -#ifdef ABSOLUTE_PREFIX - case ABSOLUTE_PREFIX: - if (str[strl-1] == ']') break; - addr_modeP->mode=21; /* absolute */ - addr_modeP->disp[0]=str+1; - return (-1); -#endif -#ifdef IMMEDIATE_PREFIX - case IMMEDIATE_PREFIX: - if (str[strl-1] == ']') break; - addr_modeP->mode=20; /* immediate */ - addr_modeP->disp[0]=str+1; - return (-1); -#endif - case '.': - if (str[strl-1] != ']') { - switch (str[1]) { - case'-':case'+': - if (str[2] != '\000') { - addr_modeP->mode=27; /* pc-relativ */ - addr_modeP->disp[0]=str+2; - return (-1); - } - default: - as_warn("Invalid syntax in PC-relative addressing mode"); - return(0); - } - } - break; - case'e': - if (str[strl-1] != ']') { - if ((!strncmp(str,"ext(",4)) && strl>7) { /* external */ - addr_modeP->disp[0]=str+4; - i=0; - j=2; - do { /* disp[0]'s termination point */ - j+=1; - if (str[j] == '(') i++; - if (str[j] == ')') i--; - } while (j < strl && i != 0); - if (i != 0 || !(str[j+1] == '-' || str[j+1] == '+') ) { - as_warn("Invalid syntax in External addressing mode"); - return(0); - } - str[j]='\000'; /* null terminate disp[0] */ - addr_modeP->disp[1]=str+j+2; - addr_modeP->mode=22; - return (-1); - } - } - break; - default:; - } - strl=strlen(str); - switch (strl) { - case 2: - switch (str[0]) { - case'f':addr_modeP->float_flag=1; - case'r': - if (str[1] >= '0' && str[1] < '8') { - addr_modeP->mode=str[1]-'0'; - return (-1); - } - } - case 3: - if (!strncmp(str,"tos",3)) { - addr_modeP->mode=23; /* TopOfStack */ - return (-1); - } - default:; - } - if (strl>4) { - if (str[strl - 1] == ')') { - if (str[strl - 2] == ')') { - if (!strncmp(&str[strl-5],"(fp",3)) { - mode=16; /* Memory Relative */ - } - if (!strncmp(&str[strl-5],"(sp",3)) { - mode=17; - } - if (!strncmp(&str[strl-5],"(sb",3)) { - mode=18; - } - if (mode != DEFAULT) { /* memory relative */ - addr_modeP->mode=mode; - j=strl-5; /* temp for end of disp[0] */ - i=0; - do { - strl-=1; - if (str[strl] == ')') i++; - if (str[strl] == '(') i--; - } while (strl>-1 && i != 0); - if (i != 0) { - as_warn("Invalid syntax in Memory Relative addressing mode"); - return(0); - } - addr_modeP->disp[1]=str; - addr_modeP->disp[0]=str+strl+1; - str[j]='\000'; /* null terminate disp[0] */ - str[strl]='\000'; /* null terminate disp[1] */ - return (-1); - } - } - switch (str[strl-3]) { - case'r':case'R': - if (str[strl - 2] >= '0' && str[strl - 2] < '8' && str[strl - 4] == '(') { - addr_modeP->mode=str[strl-2]-'0'+8; - addr_modeP->disp[0]=str; - str[strl-4]=0; - return (-1); /* reg rel */ - } - default: - if (!strncmp(&str[strl-4],"(fp",3)) { - mode=24; - } - if (!strncmp(&str[strl-4],"(sp",3)) { - mode=25; - } - if (!strncmp(&str[strl-4],"(sb",3)) { - mode=26; - } - if (!strncmp(&str[strl-4],"(pc",3)) { - mode=27; - } - if (mode != DEFAULT) { - addr_modeP->mode=mode; - addr_modeP->disp[0]=str; - str[strl-4]='\0'; - return (-1); /* memory space */ - } - } - } - /* no trailing ')' do we have a ']' ? */ - if (str[strl - 1] == ']') { - switch (str[strl-2]) { - case'b':mode=28;break; - case'w':mode=29;break; - case'd':mode=30;break; - case'q':mode=31;break; - default:; - as_warn("Invalid scaled-indexed mode, use (b,w,d,q)"); - if (str[strl - 3] != ':' || str[strl - 6] != '[' || - str[strl - 5] == 'r' || str[strl - 4] < '0' || str[strl - 4] > '7') { - as_warn("Syntax in scaled-indexed mode, use [Rn:m] where n=[0..7] m={b,w,d,q}"); - } - } /* scaled index */ - { - if (recursive_level>0) { - as_warn("Scaled-indexed addressing mode combined with scaled-index"); - return(0); - } - addr_modeP->am_size+=1; /* scaled index byte */ - j=str[strl-4]-'0'; /* store temporary */ - str[strl-6]='\000'; /* nullterminate for recursive call */ - i=addr_mode(str,addr_modeP,1); - if (!i || addr_modeP->mode == 20) { - as_warn("Invalid or illegal addressing mode combined with scaled-index"); - return(0); - } - addr_modeP->scaled_mode=addr_modeP->mode; /* store the inferior mode */ - addr_modeP->mode=mode; - addr_modeP->scaled_reg=j+1; - return (-1); - } - } - } - addr_modeP->mode = DEFAULT; /* default to whatever */ - addr_modeP->disp[0]=str; - return (-1); -} - -/* ptr points at string - addr_modeP points at struct with result - This routine calls addr_mode to determine the general addr.mode of - the operand. When this is ready it parses the displacements for size - specifying suffixes and determines size of immediate mode via ns32k-opcode. - Also builds index bytes if needed. - */ -int get_addr_mode(ptr,addr_modeP) -char *ptr; -addr_modeS *addr_modeP; -{ - int tmp; - addr_mode(ptr,addr_modeP,0); - if (addr_modeP->mode == DEFAULT || addr_modeP->scaled_mode == -1) { - /* resolve ambigious operands, this shouldn't - be necessary if one uses standard NSC operand - syntax. But the sequent compiler doesn't!!! - This finds a proper addressinging mode if it - is implicitly stated. See ns32k-opcode.h */ - (void)evaluate_expr(&exprP,ptr); /* this call takes time Sigh! */ - if (addr_modeP->mode == DEFAULT) { - if (exprP.X_add_symbol || exprP.X_subtract_symbol) { - addr_modeP->mode=desc->default_model; /* we have a label */ - } else { - addr_modeP->mode=desc->default_modec; /* we have a constant */ - } - } else { - if (exprP.X_add_symbol || exprP.X_subtract_symbol) { - addr_modeP->scaled_mode=desc->default_model; - } else { - addr_modeP->scaled_mode=desc->default_modec; - } - } - /* must put this mess down in addr_mode to handle the scaled case better */ - } - /* It appears as the sequent compiler wants an absolute when we have a - label without @. Constants becomes immediates besides the addr case. - Think it does so with local labels too, not optimum, pcrel is better. - When I have time I will make gas check this and select pcrel when possible - Actually that is trivial. - */ - if (tmp=addr_modeP->scaled_reg) { /* build indexbyte */ - tmp--; /* remember regnumber comes incremented for flagpurpose */ - tmp|=addr_modeP->scaled_mode<<3; - addr_modeP->index_byte=(char)tmp; - addr_modeP->am_size+=1; - } - if (disp_test[addr_modeP->mode]) { /* there was a displacement, probe for length specifying suffix*/ - { - register char c; - register char suffix; - register char suffix_sub; - register int i; - register char *toP; - register char *fromP; - - addr_modeP->pcrel=0; - if (disp_test[addr_modeP->mode]) { /* there is a displacement */ - if (addr_modeP->mode == 27 || addr_modeP->scaled_mode == 27) { /* do we have pcrel. mode */ - addr_modeP->pcrel=1; - } - addr_modeP->im_disp=1; - for (i=0;i<2;i++) { - suffix_sub=suffix=0; - if (toP=addr_modeP->disp[i]) { /* suffix of expression, the largest size rules */ - fromP=toP; - while (c = *fromP++) { - *toP++=c; - if (c == ':') { - switch (*fromP) { - case '\0': - as_warn("Premature end of suffix--Defaulting to d"); - suffix=4; - continue; - case 'b':suffix_sub=1;break; - case 'w':suffix_sub=2;break; - case 'd':suffix_sub=4;break; - default: - as_warn("Bad suffix after ':' use {b|w|d} Defaulting to d"); - suffix=4; - } - fromP++; - toP--; /* So we write over the ':' */ - if (suffix<suffix_sub) suffix=suffix_sub; - } - } - *toP='\0'; /* terminate properly */ - addr_modeP->disp_suffix[i]=suffix; - addr_modeP->am_size+=suffix ? suffix : 4; - } - } - } - } - } else { - if (addr_modeP->mode == 20) { /* look in ns32k_opcode for size */ - addr_modeP->disp_suffix[0]=addr_modeP->am_size=desc->im_size; - addr_modeP->im_disp=0; - } - } - return addr_modeP->mode; -} - - -/* read an optionlist */ -void optlist(str,optionP,default_map) -char *str; /* the string to extract options from */ -struct option *optionP; /* how to search the string */ -unsigned long *default_map; /* default pattern and output */ -{ - register int i,j,k,strlen1,strlen2; - register char *patternP,*strP; - strlen1=strlen(str); - if (strlen1<1) { - as_fatal("Very short instr to option, ie you can't do it on a NULLstr"); - } - for (i = 0; optionP[i].pattern != 0; i++) { - strlen2=strlen(optionP[i].pattern); - for (j=0;j<strlen1;j++) { - patternP=optionP[i].pattern; - strP = &str[j]; - for (k=0;k<strlen2;k++) { - if (*(strP++) != *(patternP++)) break; - } - if (k == strlen2) { /* match */ - *default_map|=optionP[i].or; - *default_map&=optionP[i].and; - } - } - } -} -/* search struct for symbols - This function is used to get the short integer form of reg names - in the instructions lmr, smr, lpr, spr - return true if str is found in list */ - -int list_search(str,optionP,default_map) -char *str; /* the string to match */ -struct option *optionP; /* list to search */ -unsigned long *default_map; /* default pattern and output */ -{ - register int i; - for (i = 0; optionP[i].pattern != 0; i++) { - if (!strncmp(optionP[i].pattern,str,20)) { /* use strncmp to be safe */ - *default_map|=optionP[i].or; - *default_map&=optionP[i].and; - return -1; - } - } - as_warn("No such entry in list. (cpu/mmu register)"); - return 0; -} -static segT evaluate_expr(resultP,ptr) -expressionS *resultP; -char *ptr; -{ - register char *tmp_line; - register segT segment; - tmp_line = input_line_pointer; - input_line_pointer = ptr; - segment = expression(&exprP); - input_line_pointer = tmp_line; - return(segment); -} - -/* Convert operands to iif-format and adds bitfields to the opcode. - Operands are parsed in such an order that the opcode is updated from - its most significant bit, that is when the operand need to alter the - opcode. - Be carefull not to put to objects in the same iif-slot. - */ - -void encode_operand(argc,argv,operandsP,suffixP,im_size,opcode_bit_ptr) -int argc; -char **argv; -char *operandsP; -char *suffixP; -char im_size; -char opcode_bit_ptr; -{ - register int i,j; - int pcrel,tmp,b,loop,pcrel_adjust; - for (loop=0;loop<argc;loop++) { - i=operandsP[loop<<1]-'1'; /* what operand are we supposed to work on */ - if (i>3) as_fatal("Internal consistency error. check ns32k-opcode.h"); - pcrel=0; - pcrel_adjust=0; - tmp=0; - switch (operandsP[(loop<<1)+1]) { - case 'f': /* operand of sfsr turns out to be a nasty specialcase */ - opcode_bit_ptr-=5; - case 'F': /* 32 bit float general form */ - case 'L': /* 64 bit float */ - case 'Q': /* quad-word */ - case 'B': /* byte */ - case 'W': /* word */ - case 'D': /* double-word */ - case 'A': /* double-word gen-address-form ie no regs allowed */ - get_addr_mode(argv[i],&addr_modeP); - iif.instr_size+=addr_modeP.am_size; - if (opcode_bit_ptr == desc->opcode_size) b = 4; else b = 6; - for (j=b;j<(b+2);j++) { - if (addr_modeP.disp[j-b]) { - IIF(j, - 2, - addr_modeP.disp_suffix[j-b], - (unsigned long)addr_modeP.disp[j-b], - 0, - addr_modeP.pcrel, - iif.instr_size-addr_modeP.am_size, /* this aint used (now) */ - addr_modeP.im_disp, - IND(BRANCH,BYTE), - NULL, - addr_modeP.scaled_reg ? addr_modeP.scaled_mode:addr_modeP.mode, - 0); - } - } - opcode_bit_ptr-=5; - iif.iifP[1].object|=((long)addr_modeP.mode)<<opcode_bit_ptr; - if (addr_modeP.scaled_reg) { - j=b/2; - IIF(j,1,1, (unsigned long)addr_modeP.index_byte,0,0,0,0,0, NULL,-1,0); - } - break; - case 'b': /* multiple instruction disp */ - freeptr++; /* OVE:this is an useful hack */ - tmp = (int) sprintf(freeptr, - "((%s-1)*%d)\000", - argv[i], desc->im_size); - argv[i]=freeptr; - freeptr=(char*)tmp; - pcrel-=1; /* make pcrel 0 inspite of what case 'p': wants */ - /* fall thru */ - case 'p': /* displacement - pc relative addressing */ - pcrel+=1; - /* fall thru */ - case 'd': /* displacement */ - iif.instr_size+=suffixP[i] ? suffixP[i] : 4; - IIF(12, 2, suffixP[i], (unsigned long)argv[i], 0, - pcrel, pcrel_adjust, 1, IND(BRANCH,BYTE), NULL,-1,0); - break; - case 'H': /* sequent-hack: the linker wants a bit set when bsr */ - pcrel=1; - iif.instr_size+=suffixP[i] ? suffixP[i] : 4; - IIF(12, 2, suffixP[i], (unsigned long)argv[i], 0, - pcrel, pcrel_adjust, 1, IND(BRANCH,BYTE), NULL,-1, 1); - break; - case 'q': /* quick */ - opcode_bit_ptr-=4; - IIF(11,2,42,(unsigned long)argv[i],0,0,0,0,0, - bit_fix_new(4,opcode_bit_ptr,-8,7,0,1,0),-1,0); - break; - case 'r': /* register number (3 bits) */ - list_search(argv[i],opt6,&tmp); - opcode_bit_ptr-=3; - iif.iifP[1].object|=tmp<<opcode_bit_ptr; - break; - case 'O': /* setcfg instruction optionslist */ - optlist(argv[i],opt3,&tmp); - opcode_bit_ptr-=4; - iif.iifP[1].object|=tmp<<15; - break; - case 'C': /* cinv instruction optionslist */ - optlist(argv[i],opt4,&tmp); - opcode_bit_ptr-=4; - iif.iifP[1].object|=tmp<<15;/*insert the regtype in opcode */ - break; - case 'S': /* stringinstruction optionslist */ - optlist(argv[i],opt5,&tmp); - opcode_bit_ptr-=4; - iif.iifP[1].object|=tmp<<15; - break; - case 'u':case 'U': /* registerlist */ - IIF(10,1,1,0,0,0,0,0,0,NULL,-1,0); - switch (operandsP[(i<<1)+1]) { - case 'u': /* restore, exit */ - optlist(argv[i],opt1,&iif.iifP[10].object); - break; - case 'U': /* save,enter */ - optlist(argv[i],opt2,&iif.iifP[10].object); - break; - } - iif.instr_size+=1; - break; - case 'M': /* mmu register */ - list_search(argv[i],mmureg,&tmp); - opcode_bit_ptr-=4; - iif.iifP[1].object|=tmp<<opcode_bit_ptr; - break; - case 'P': /* cpu register */ - list_search(argv[i],cpureg,&tmp); - opcode_bit_ptr-=4; - iif.iifP[1].object|=tmp<<opcode_bit_ptr; - break; - case 'g': /* inss exts */ - iif.instr_size+=1; /* 1 byte is allocated after the opcode */ - IIF(10,2,1, - (unsigned long)argv[i], /* i always 2 here */ - 0,0,0,0,0, - bit_fix_new(3,5,0,7,0,0,0), /* a bit_fix is targeted to the byte */ - -1,0); - case 'G': - IIF(11,2,42, - (unsigned long)argv[i], /* i always 3 here */ - 0,0,0,0,0, - bit_fix_new(5,0,1,32,-1,0,-1),-1,0); - break; - case 'i': - iif.instr_size+=1; - b=2+i; /* put the extension byte after opcode */ - IIF(b,2,1,0,0,0,0,0,0,0,-1,0); - default: - as_fatal("Bad opcode-table-option, check in file ns32k-opcode.h"); - } - } -} - -/* in: instruction line - out: internal structure of instruction - that has been prepared for direct conversion to fragment(s) and - fixes in a systematical fashion - Return-value = recursive_level - */ -/* build iif of one assembly text line */ -int parse(line,recursive_level) -char *line; -int recursive_level; -{ - register char *lineptr,c,suffix_separator; - register int i; - int argc,arg_type; - char sqr,sep; - char suffix[MAX_ARGS],*argv[MAX_ARGS];/* no more than 4 operands */ - if (recursive_level <= 0) { /* called from md_assemble */ - for (lineptr=line; (*lineptr) != '\0' && (*lineptr) != ' '; lineptr++); - c = *lineptr; - *lineptr = '\0'; - desc = (struct ns32k_opcode*) hash_find(inst_hash_handle,line); - if (!desc) { - as_fatal("No such opcode"); - } - *lineptr = c; - } else { - lineptr = line; - } - argc = 0; - if (*desc->operands != NULL) { - if (*lineptr++ != '\0') { - sqr='['; - sep=','; - while (*lineptr != '\0') { - if (desc->operands[argc << 1]) { - suffix[argc] = 0; - arg_type = - desc->operands[(argc << 1) + 1]; - switch (arg_type) { - case 'd': - case 'b': - case 'p': - case 'H': /* the operand is supposed to be a displacement */ - /* Hackwarning: do not forget to update the 4 cases above when editing ns32k-opcode.h */ - suffix_separator = ':'; - break; - default: - suffix_separator = '\255'; /* if this char occurs we loose */ - } - suffix[argc] = 0; /* 0 when no ':' is encountered */ - argv[argc] = freeptr; - *freeptr = '\0'; - while ((c = *lineptr) != '\0' && c != sep) { - if (c == sqr) { - if (sqr == '[') { - sqr = ']'; - sep = '\0'; - } else { - sqr = '['; - sep = ','; - } - } - if (c == suffix_separator) { /* ':' - label/suffix separator */ - switch (lineptr[1]) { - case 'b': suffix[argc] = 1; break; - case 'w': suffix[argc] = 2; break; - case 'd': suffix[argc] = 4; break; - default: as_warn("Bad suffix, defaulting to d"); - suffix[argc] = 4; - if (lineptr[1] == '\0' || lineptr[1] == sep) { - lineptr += 1; - continue; - } - } - lineptr += 2; - continue; - } - *freeptr++ = c; - lineptr++; - } - *freeptr++ = '\0'; - argc += 1; - if (*lineptr == '\0') continue; - lineptr += 1; - } else { - as_fatal("Too many operands passed to instruction"); - } - } - } - } - if (argc != strlen(desc->operands) / 2) { - if (strlen(desc->default_args) != 0) { /* we can apply default, dont goof */ - if (parse(desc->default_args,1) != 1) { /* check error in default */ - as_fatal("Wrong numbers of operands in default, check ns32k-opcodes.h"); - } - } else { - as_fatal("Wrong number of operands"); - } - - } - for (i = 0; i < IIF_ENTRIES; i++) { - iif.iifP[i].type = 0; /* mark all entries as void*/ - } - - /* build opcode iif-entry */ - iif.instr_size = desc->opcode_size / 8; - IIF(1,1,iif.instr_size,desc->opcode_seed,0,0,0,0,0,0,-1,0); - - /* this call encodes operands to iif format */ - if (argc) { - encode_operand(argc, - argv, - &desc->operands[0], - &suffix[0], - desc->im_size, - desc->opcode_size); - } - return(recursive_level); -} - - -/* Convert iif to fragments. - From this point we start to dribble with functions in other files than - this one.(Except hash.c) So, if it's possible to make an iif for an other - CPU, you don't need to know what frags, relax, obstacks, etc is in order - to port this assembler. You only need to know if it's possible to reduce - your cpu-instruction to iif-format (takes some work) and adopt the other - md_? parts according to given instructions - Note that iif was invented for the clean ns32k`s architecure. - */ -void convert_iif() { - int i; - bit_fixS *bit_fixP; - fragS *inst_frag; - char *inst_offset; - char *inst_opcode; - char *memP; - segT segment; - int l; - int k; - int rem_size; /* count the remaining bytes of instruction */ - char type; - char size = 0; - int size_so_far = 0; /* used to calculate pcrel_adjust */ - int pcrel_symbols = 0;/* kludge by jkp@hut.fi to make - movd _foo(pc),_bar(pc) work. - It should be done with two frags - for one insn, but I don't understand - enough to make it work */ - - rem_size = iif.instr_size; - memP = frag_more(iif.instr_size); /* make sure we have enough bytes for instruction */ - inst_opcode = memP; - inst_offset = (char *)(memP-frag_now->fr_literal); - inst_frag = frag_now; - for (i=0; i < IIF_ENTRIES; i++) { /* jkp kludge alert */ - if (iif.iifP[i].type && iif.iifP[i].size == 0 && - iif.iifP[i].pcrel) { - evaluate_expr(&exprP, (char *)iif.iifP[i].object); - if (exprP.X_add_symbol || exprP.X_subtract_symbol) - pcrel_symbols++; - } - } - for (i=0;i<IIF_ENTRIES;i++) { - if (type=iif.iifP[i].type) { /* the object exist, so handle it */ -#ifdef PIC - int reloc_mode; - if ((i == 4 || i == 6) - && picmode - && (iif.iifP[i].addr_mode == 18 || iif.iifP[i].addr_mode == 26)) - reloc_mode = RELOC_GLOB_DAT; - else - reloc_mode = NO_RELOC; -#else - int reloc_mode = NO_RELOC; -#endif - switch (size=iif.iifP[i].size) { - case 42: size=0; /* it's a bitfix that operates on an existing object*/ - if (iif.iifP[i].bit_fixP->fx_bit_base) { /* expand fx_bit_base to point at opcode */ - iif.iifP[i].bit_fixP->fx_bit_base = (long) inst_opcode; - } - case 8: /* bignum or doublefloat */ - memset(memP, '\0', 8); - case 1:case 2:case 3:case 4:/* the final size in objectmemory is known */ - bit_fixP = iif.iifP[i].bit_fixP; - switch (type) { - case 1: /* the object is pure binary */ - if (bit_fixP || iif.iifP[i].pcrel) { - fix_new_ns32k(frag_now, - (long)(memP-frag_now->fr_literal), - size, - 0, - 0, - iif.iifP[i].object, - iif.iifP[i].pcrel, - (char)size_so_far, /*iif.iifP[i].pcrel_adjust,*/ - iif.iifP[i].im_disp, - bit_fixP, - iif.iifP[i].bsr, /* sequent hack */ - reloc_mode); - } else { /* good, just put them bytes out */ - switch (iif.iifP[i].im_disp) { - case 0: - md_number_to_chars(memP,iif.iifP[i].object,size);break; - case 1: - md_number_to_disp(memP,iif.iifP[i].object,size);break; - default: as_fatal("iif convert internal pcrel/binary"); - } - } - memP+=size; - rem_size-=size; - break; - case 2: /* the object is a pointer at an expression, so unpack - it, note that bignums may result from the expression - */ - if ((segment = evaluate_expr(&exprP, (char*)iif.iifP[i].object)) == SEG_BIG || size == 8) { - if ((k=exprP.X_add_number)>0) { /* we have a bignum ie a quad */ - /* this can only happens in a long suffixed instruction */ - memset(memP, '\0', size); /* size normally is 8 */ - if (k*2>size) as_warn("Bignum too big for long"); - if (k == 3) memP += 2; - for (l=0;k>0;k--,l+=2) { - md_number_to_chars(memP+l,generic_bignum[l>>1],sizeof(LITTLENUM_TYPE)); - } - } else { /* flonum */ - LITTLENUM_TYPE words[4]; - - switch (size) { - case 4: - gen_to_words(words,2,8); - md_number_to_imm(memP ,(long)words[0],sizeof(LITTLENUM_TYPE)); - md_number_to_imm(memP+sizeof(LITTLENUM_TYPE),(long)words[1],sizeof(LITTLENUM_TYPE)); - break; - case 8: - gen_to_words(words,4,11); - md_number_to_imm(memP ,(long)words[0],sizeof(LITTLENUM_TYPE)); - md_number_to_imm(memP+sizeof(LITTLENUM_TYPE) ,(long)words[1],sizeof(LITTLENUM_TYPE)); - md_number_to_imm(memP+2*sizeof(LITTLENUM_TYPE),(long)words[2],sizeof(LITTLENUM_TYPE)); - md_number_to_imm(memP+3*sizeof(LITTLENUM_TYPE),(long)words[3],sizeof(LITTLENUM_TYPE)); - break; - } - } - memP+=size; - rem_size-=size; - break; - } - if (bit_fixP || - exprP.X_add_symbol || - exprP.X_subtract_symbol || - iif.iifP[i].pcrel) { /* fixit */ - /* the expression was undefined due to an undefined label */ - /* create a fix so we can fix the object later */ - exprP.X_add_number+=iif.iifP[i].object_adjust; - fix_new_ns32k(frag_now, - (long)(memP-frag_now->fr_literal), - size, - exprP.X_add_symbol, - exprP.X_subtract_symbol, - exprP.X_add_number, - iif.iifP[i].pcrel, - (char)size_so_far, /*iif.iifP[i].pcrel_adjust,*/ - iif.iifP[i].im_disp, - bit_fixP, - iif.iifP[i].bsr, /* sequent hack */ - reloc_mode); - - } else { /* good, just put them bytes out */ - switch (iif.iifP[i].im_disp) { - case 0: - md_number_to_imm(memP,exprP.X_add_number,size);break; - case 1: - md_number_to_disp(memP,exprP.X_add_number,size);break; - default: as_fatal("iif convert internal pcrel/pointer"); - } - } - memP+=size; - rem_size-=size; - break; - default: as_fatal("Internal logic error in iif.iifP[n].type"); - } - break; - case 0: /* To bad, the object may be undefined as far as its final - nsize in object memory is concerned. The size of the object - in objectmemory is not explicitly given. - If the object is defined its length can be determined and - a fix can replace the frag. - */ - { - int temp; - segment = evaluate_expr(&exprP, (char*)iif.iifP[i].object); - if (((exprP.X_add_symbol || exprP.X_subtract_symbol) && - !iif.iifP[i].pcrel) || pcrel_symbols >= 2 /*jkp*/) { /* OVE: hack, clamp to 4 bytes */ -#ifdef PIC - if (reloc_mode == RELOC_GLOB_DAT && got_offset_size == 2) { - size = 2; - /* rewind the bytes not used */ - obstack_blank_fast(&frags, -2); - } else -#endif - size=4; /* we dont wan't to frag this, use 4 so it reaches */ - fix_new_ns32k(frag_now, - (long)(memP-frag_now->fr_literal), - size, - exprP.X_add_symbol, - exprP.X_subtract_symbol, - exprP.X_add_number, - pcrel_symbols >= 2 ? iif.iifP[i].pcrel : 0, /*jkp*//* never iif.iifP[i].pcrel, */ - (char)size_so_far, /*iif.iifP[i].pcrel_adjust,*/ - 1, /* always iif.iifP[i].im_disp, */ - 0,0, - reloc_mode); - memP+=size; - rem_size-=4; - break; /* exit this absolute hack */ - } - - if (exprP.X_add_symbol || exprP.X_subtract_symbol) { /* frag it */ - if (exprP.X_subtract_symbol) { /* We cant relax this case */ - as_fatal("Can't relax difference"); - } else { - /* at this stage we must undo some of the effect caused - by frag_more, ie we must make sure that frag_var causes - frag_new to creat a valid fix-size in the frag it`s closing - */ - temp = -(rem_size-4); - obstack_blank_fast(&frags,temp); - /* we rewind none, some or all of the requested size we - requested by the first frag_more for this iif chunk. - Note: that we allocate 4 bytes to an object we NOT YET - know the size of, thus rem_size-4. - */ - (void) frag_variant(rs_machine_dependent, - 4, - 0, - IND(BRANCH,UNDEF), /* expecting the worst */ - exprP.X_add_symbol, - exprP.X_add_number, - inst_opcode, - (char)size_so_far, /*iif.iifP[i].pcrel_adjust);*/ - iif.iifP[i].bsr); /* sequent linker hack */ - rem_size -= 4; - if (rem_size > 0) { - memP = frag_more(rem_size); - } - } - } else {/* Double work, this is done in md_number_to_disp */ - /* exprP.X_add_number; fixme-soon what was this supposed to be? xoxorich. */ - if (-64 <= exprP.X_add_number && exprP.X_add_number <= 63) { - size = 1; - } else { - if (-8192 <= exprP.X_add_number && exprP.X_add_number <= 8191) { - size = 2; - - /* Dave Taylor <taylor@think.com> says: Note: The reason the lower - limit is -0x1f000000 and not -0x20000000 is that, according to - Nat'l Semi's data sheet on the ns32532, ``the pattern 11100000 - for the most significant byte of the displacement is reserved by - National for future enhancements''. */ - } else if (/* -0x40000000 <= exprP.X_add_number && - exprP.X_add_number <= 0x3fffffff */ - -0x1f000000 <= exprP.X_add_number && - exprP.X_add_number <= 0x1fffffff) { - size = 4; - } else { - as_warn("Displacement too large for :d"); - size = 4; - } - } - /* rewind the bytes not used */ - temp = -(4-size); - md_number_to_disp(memP,exprP.X_add_number,size); - obstack_blank_fast(&frags,temp); - memP += size; - rem_size -= 4; /* we allocated this amount */ - } - } - break; - default: - as_fatal("Internal logic error in iif.iifP[].type"); - } - size_so_far += size; - size = 0; - } - } -} - -void md_assemble(line) -char *line; -{ - freeptr=freeptr_static; - parse(line,0); /* explode line to more fix form in iif */ - convert_iif(); /* convert iif to frags, fix's etc */ -#ifdef SHOW_NUM - printf(" \t\t\t%s\n",line); -#endif -} - - -void md_begin() { - /* build a hashtable of the instructions */ - register const struct ns32k_opcode *ptr; - register char *stat; - inst_hash_handle=hash_new(); - for (ptr=ns32k_opcodes;ptr<endop;ptr++) { - if (*(stat=hash_insert(inst_hash_handle,ptr->name,(char*)ptr))) { - as_fatal("Can't hash %s: %s", ptr->name,stat); /*fatal*/ - exit(0); - } - } - freeptr_static=(char*)malloc(PRIVATE_SIZE); /* some private space please! */ -} - - -void - md_end() { - free(freeptr_static); - } - -/* Must be equal to MAX_PRECISON in atof-ieee.c */ -#define MAX_LITTLENUMS 6 - -/* Turn the string pointed to by litP into a floating point constant of type - type, and emit the appropriate bytes. The number of LITTLENUMS emitted - is stored in *sizeP. An error message is returned, or NULL on OK. - */ -char * - md_atof(type,litP,sizeP) -char type; -char *litP; -int *sizeP; -{ - int prec; - LITTLENUM_TYPE words[MAX_LITTLENUMS]; - LITTLENUM_TYPE *wordP; - extern char *atof_ieee(); - char *t; - - switch (type) { - case 'f': - prec = 2; - break; - - case 'd': - prec = 4; - break; - default: - *sizeP = 0; - return "Bad call to MD_ATOF()"; - } - t = atof_ieee(input_line_pointer, type, words); - if (t) - input_line_pointer=t; - - *sizeP = prec * sizeof(LITTLENUM_TYPE); - for (wordP = words + prec; prec--;) { - md_number_to_chars(litP, (long)(*--wordP), sizeof(LITTLENUM_TYPE)); - litP+=sizeof(LITTLENUM_TYPE); - } - return ""; /* Someone should teach Dean about null pointers */ -} - -/* Convert number to chars in correct order */ - -void - md_number_to_chars(buf, value, nbytes) -char *buf; -long value; -int nbytes; -{ - while (nbytes--) { -#ifdef SHOW_NUM - printf("%x ",value & 0xff); -#endif - *buf++ = value; /* Lint wants & MASK_CHAR. */ - value >>= BITS_PER_CHAR; - } -} /* md_number_to_chars() */ - - -/* This is a variant of md_numbers_to_chars. The reason for its' existence - is the fact that ns32k uses Huffman coded displacements. This implies - that the bit order is reversed in displacements and that they are prefixed - with a size-tag. - - binary: msb->lsb - 0xxxxxxx byte - 10xxxxxx xxxxxxxx word - 11xxxxxx xxxxxxxx xxxxxxxx xxxxxxxx double word - - This must be taken care of and we do it here! - */ -static void md_number_to_disp(buf, val, n) -char *buf; -long val; -char n; -{ - switch (n) { - case 1: - if (val < -64 || val > 63) -{ -fprintf(stderr, "val = %d\n", val); - as_warn("Byte displacement out of range. line number not valid"); -} - val &= 0x7f; -#ifdef SHOW_NUM - printf("%x ",val & 0xff); -#endif - *buf++ = val; - break; - case 2: - if (val < -8192 || val > 8191) - as_warn("Word displacement out of range. line number not valid"); - val&=0x3fff; - val|=0x8000; -#ifdef SHOW_NUM - printf("%x ",val>>8 & 0xff); -#endif - *buf++=(val>>8); -#ifdef SHOW_NUM - printf("%x ",val & 0xff); -#endif - *buf++=val; - break; - case 4: - - /* Dave Taylor <taylor@think.com> says: Note: The reason the - lower limit is -0x1f000000 and not -0x20000000 is that, - according to Nat'l Semi's data sheet on the ns32532, ``the - pattern 11100000 for the most significant byte of the - displacement is reserved by National for future - enhancements''. */ - - if (val < -0x1f000000 || val >= 0x20000000) - as_warn("Double word displacement out of range"); - val|=0xc0000000; -#ifdef SHOW_NUM - printf("%x ",val>>24 & 0xff); -#endif - *buf++=(val>>24); -#ifdef SHOW_NUM - printf("%x ",val>>16 & 0xff); -#endif - *buf++=(val>>16); -#ifdef SHOW_NUM - printf("%x ",val>>8 & 0xff); -#endif - *buf++=(val>>8); -#ifdef SHOW_NUM - printf("%x ",val & 0xff); -#endif - *buf++=val; - break; - default: - as_fatal("Internal logic error. line %s, file \"%s\"", __LINE__, __FILE__); - } -} - -static void md_number_to_imm(buf,val,n) -char *buf; -long val; -char n; -{ - switch (n) { - case 1: -#ifdef SHOW_NUM - printf("%x ",val & 0xff); -#endif - *buf++=val; - break; - case 2: -#ifdef SHOW_NUM - printf("%x ",val>>8 & 0xff); -#endif - *buf++=(val>>8); -#ifdef SHOW_NUM - printf("%x ",val & 0xff); -#endif - *buf++=val; - break; - case 4: -#ifdef SHOW_NUM - printf("%x ",val>>24 & 0xff); -#endif - *buf++=(val>>24); -#ifdef SHOW_NUM - printf("%x ",val>>16 & 0xff); -#endif - *buf++=(val>>16); -#ifdef SHOW_NUM - printf("%x ",val>>8 & 0xff); -#endif - *buf++=(val>>8); -#ifdef SHOW_NUM - printf("%x ",val & 0xff); -#endif - *buf++=val; - break; - default: - as_fatal("Internal logic error. line %s, file \"%s\"", __LINE__, __FILE__); - } -} - -/* Translate internal representation of relocation info into target format. - - OVE: on a ns32k the twiddling continues at an even deeper level - here we have to distinguish between displacements and immediates. - - The sequent has a bit for this. It also has a bit for relocobjects that - points at the target for a bsr (BranchSubRoutine) !?!?!?! - - This md_ri.... is tailored for sequent. - */ - -#ifdef comment -void - md_ri_to_chars(the_bytes, ri) -char *the_bytes; -struct reloc_info_generic *ri; -{ - if (ri->r_bsr) { ri->r_pcrel = 0; } /* sequent seems to want this */ - md_number_to_chars(the_bytes, ri->r_address, sizeof(ri->r_address)); - md_number_to_chars(the_bytes+4, ((long)(ri->r_symbolnum ) - | (long)(ri->r_pcrel << 24 ) - | (long)(ri->r_length << 25 ) - | (long)(ri->r_extern << 27 ) - | (long)(ri->r_bsr << 28 ) - | (long)(ri->r_disp << 29 )), - 4); - /* the first and second md_number_to_chars never overlaps (32bit cpu case) */ -} -#endif /* comment */ - -#ifdef OBJ_AOUT -void tc_aout_fix_to_chars(where, fixP, segment_address_in_file) -char *where; -fixS *fixP; -relax_addressT segment_address_in_file; -{ - /* - * In: length of relocation (or of address) in chars: 1, 2 or 4. - * Out: GNU LD relocation length code: 0, 1, or 2. - */ - - static unsigned char nbytes_r_length[] = { 42, 0, 1, 42, 2 }; - long r_symbolnum; - int r_flags; - - know(fixP->fx_addsy != NULL); - - md_number_to_chars(where, - fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file, - 4); - - r_symbolnum = (S_IS_DEFINED(fixP->fx_addsy) - ? S_GET_TYPE(fixP->fx_addsy) - : fixP->fx_addsy->sy_number); - r_flags = (fixP->fx_pcrel ? 1 : 0) - | ((nbytes_r_length[fixP->fx_size] & 3) << 1) - | (!S_IS_DEFINED(fixP->fx_addsy) ? 8 : 0) -#if defined(TE_SEQUENT) - | (fixP->fx_bsr ? 0x10 : 0) -#elif defined(PIC) - /* Undefined pc-relative relocations are of type jmpslot */ - | ((!S_IS_DEFINED(fixP->fx_addsy) - && fixP->fx_pcrel - && fixP->fx_addsy != got_symbol - && picmode) ? 0x10 : 0) -#endif - | (fixP->fx_im_disp & 3) << 5; - -#ifdef PIC - switch (fixP->fx_r_type) { - case NO_RELOC: - break; - case RELOC_32: - if (picmode && S_IS_EXTERNAL(fixP->fx_addsy)) { - r_symbolnum = fixP->fx_addsy->sy_number; - r_flags |= 8; /* set extern bit */ - } - break; - case RELOC_GLOB_DAT: - if (!fixP->fx_pcrel) { - r_flags |= 0x80; /* set baserel bit */ - r_symbolnum = fixP->fx_addsy->sy_number; - if (S_IS_EXTERNAL(fixP->fx_addsy)) - r_flags |= 8; - } - break; - case RELOC_RELATIVE: - /* should never happen */ - as_fatal("relocation botch"); - break; - } -#endif /* PIC */ - - where[4] = r_symbolnum & 0x0ff; - where[5] = (r_symbolnum >> 8) & 0x0ff; - where[6] = (r_symbolnum >> 16) & 0x0ff; - where[7] = r_flags; - - return; -} /* tc_aout_fix_to_chars() */ - - -#endif /* OBJ_AOUT */ - -/* fast bitfiddling support */ -/* mask used to zero bitfield before oring in the true field */ - -static unsigned long l_mask[] = { - 0xffffffff, 0xfffffffe, 0xfffffffc, 0xfffffff8, - 0xfffffff0, 0xffffffe0, 0xffffffc0, 0xffffff80, - 0xffffff00, 0xfffffe00, 0xfffffc00, 0xfffff800, - 0xfffff000, 0xffffe000, 0xffffc000, 0xffff8000, - 0xffff0000, 0xfffe0000, 0xfffc0000, 0xfff80000, - 0xfff00000, 0xffe00000, 0xffc00000, 0xff800000, - 0xff000000, 0xfe000000, 0xfc000000, 0xf8000000, - 0xf0000000, 0xe0000000, 0xc0000000, 0x80000000, -}; -static unsigned long r_mask[] = { - 0x00000000, 0x00000001, 0x00000003, 0x00000007, - 0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f, - 0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff, - 0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff, - 0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff, - 0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff, - 0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff, - 0x0fffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff, -}; -#define MASK_BITS 31 -/* Insert bitfield described by field_ptr and val at buf - This routine is written for modification of the first 4 bytes pointed - to by buf, to yield speed. - The ifdef stuff is for selection between a ns32k-dependent routine - and a general version. (My advice: use the general version!) - */ - -static void - md_number_to_field(buf,val,field_ptr) -register char *buf; -register long val; -register bit_fixS *field_ptr; -{ - register unsigned long object; - register unsigned long mask; - /* define ENDIAN on a ns32k machine */ -#ifdef ENDIAN - register unsigned long *mem_ptr; -#else - register char *mem_ptr; -#endif - if (field_ptr->fx_bit_min <= val && val <= field_ptr->fx_bit_max) { -#ifdef ENDIAN - if (field_ptr->fx_bit_base) { /* override buf */ - mem_ptr=(unsigned long*)field_ptr->fx_bit_base; - } else { - mem_ptr=(unsigned long*)buf; - } -#else - if (field_ptr->fx_bit_base) { /* override buf */ - mem_ptr=(char*)field_ptr->fx_bit_base; - } else { - mem_ptr=buf; - } -#endif - mem_ptr+=field_ptr->fx_bit_base_adj; -#ifdef ENDIAN /* we have a nice ns32k machine with lowbyte at low-physical mem */ - object = *mem_ptr; /* get some bytes */ -#else /* OVE Goof! the machine is a m68k or dito */ - /* That takes more byte fiddling */ - object=0; - object|=mem_ptr[3] & 0xff; - object<<=8; - object|=mem_ptr[2] & 0xff; - object<<=8; - object|=mem_ptr[1] & 0xff; - object<<=8; - object|=mem_ptr[0] & 0xff; -#endif - mask=0; - mask|=(r_mask[field_ptr->fx_bit_offset]); - mask|=(l_mask[field_ptr->fx_bit_offset+field_ptr->fx_bit_size]); - object&=mask; - val+=field_ptr->fx_bit_add; - object|=((val<<field_ptr->fx_bit_offset) & (mask ^ 0xffffffff)); -#ifdef ENDIAN - *mem_ptr=object; -#else - mem_ptr[0]=(char)object; - object>>=8; - mem_ptr[1]=(char)object; - object>>=8; - mem_ptr[2]=(char)object; - object>>=8; - mem_ptr[3]=(char)object; -#endif - } else { - as_warn("Bit field out of range"); - } -} - -/* Apply a fixS (fixup of an instruction or data that we didn't have - enough info to complete immediately) to the data in a frag. - - On the ns32k, everything is in a different format, so we have broken - out separate functions for each kind of thing we could be fixing. - They all get called from here. */ - -void - md_apply_fix(fixP, val) -fixS *fixP; -long val; -{ - char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; - - if (fixP->fx_bit_fixP) { /* Bitfields to fix, sigh */ - md_number_to_field (buf, val, fixP->fx_bit_fixP); - } else switch (fixP->fx_im_disp) { - - case 0: /* Immediate field */ - md_number_to_imm (buf, val, fixP->fx_size); - break; - - case 1: /* Displacement field */ - md_number_to_disp (buf, - fixP->fx_pcrel? val + fixP->fx_pcrel_adjust: val, - fixP->fx_size); - break; - - case 2: /* Pointer in a data object */ - md_number_to_chars (buf, val, fixP->fx_size); - break; - } -} - -/* Convert a relaxed displacement to ditto in final output */ - -void - md_convert_frag(headers, fragP) -object_headers *headers; -register fragS *fragP; -{ - long disp; - long ext = 0; - - /* Address in gas core of the place to store the displacement. */ - register char *buffer_address = fragP->fr_fix + fragP->fr_literal; - /* Address in object code of the displacement. */ - register int object_address = fragP->fr_fix + fragP->fr_address; - - know(fragP->fr_symbol); - - /* The displacement of the address, from current location. */ - disp = (S_GET_VALUE(fragP->fr_symbol) + fragP->fr_offset) - object_address; - disp += fragP->fr_pcrel_adjust; - - switch (fragP->fr_subtype) { - case IND(BRANCH,BYTE): - ext = 1; - break; - case IND(BRANCH,WORD): - ext = 2; - break; - case IND(BRANCH,DOUBLE): - ext = 4; - break; - } - if (ext) { - md_number_to_disp(buffer_address, (long)disp, (int)ext); - fragP->fr_fix += ext; - } -} /* md_convert_frag() */ - - - -/* This function returns the estimated size a variable object will occupy, - one can say that we tries to guess the size of the objects before we - actually know it */ - -int md_estimate_size_before_relax(fragP, segment) -register fragS *fragP; -segT segment; -{ - int old_fix; - old_fix = fragP->fr_fix; - switch (fragP->fr_subtype) { - case IND(BRANCH,UNDEF): - if (S_GET_SEGMENT(fragP->fr_symbol) == segment) { - /* the symbol has been assigned a value */ - fragP->fr_subtype = IND(BRANCH,BYTE); - } else { - /* we don't relax symbols defined in an other segment - the thing to do is to assume the object will occupy 4 bytes */ - fix_new_ns32k(fragP, - (int)(fragP->fr_fix), - 4, - fragP->fr_symbol, - (symbolS *)0, - fragP->fr_offset, - 1, - fragP->fr_pcrel_adjust, - 1, - 0, - fragP->fr_bsr, /*sequent hack */ - NO_RELOC); - fragP->fr_fix+=4; - /* fragP->fr_opcode[1]=0xff; */ - frag_wane(fragP); - break; - } - case IND(BRANCH,BYTE): - fragP->fr_var+=1; - break; - default: - break; - } - return fragP->fr_var + fragP->fr_fix - old_fix; -} - -int md_short_jump_size = 3; -int md_long_jump_size = 5; -const int md_reloc_size = 8; /* Size of relocation record */ - -void - md_create_short_jump(ptr,from_addr,to_addr,frag,to_symbol) -char *ptr; -long from_addr, - to_addr; -fragS *frag; -symbolS *to_symbol; -{ - long offset; - - offset = to_addr - from_addr; - md_number_to_chars(ptr, (long)0xEA ,1); - md_number_to_disp(ptr+1,(long)offset,2); -} - -void - md_create_long_jump(ptr,from_addr,to_addr,frag,to_symbol) -char *ptr; -long from_addr, - to_addr; -fragS *frag; -symbolS *to_symbol; -{ - long offset; - - offset= to_addr - from_addr; - md_number_to_chars(ptr, (long)0xEA, 2); - md_number_to_disp(ptr+2,(long)offset,4); -} - -/* JF this is a new function to parse machine-dep options */ -int - md_parse_option(argP,cntP,vecP) -char **argP; -int *cntP; -char ***vecP; -{ - switch (**argP) { - case 'm': - (*argP)++; - - if (!strcmp(*argP,"32032")) { - cpureg = cpureg_032; - mmureg = mmureg_032; - } else if (!strcmp(*argP, "32532")) { - cpureg = cpureg_532; - mmureg = mmureg_532; - } else - as_warn("Unknown -m option ignored"); - - while (**argP) - (*argP)++; - break; - -#ifdef PIC - case 'K': - got_offset_size = 4; - /*FALLTHROUGH*/ - case 'k': - got_symbol = symbol_find_or_make("__GLOBAL_OFFSET_TABLE_"); - break; -#endif - - default: - return 0; - } - return 1; -} - -/* - * bit_fix_new() - * - * Create a bit_fixS in obstack 'notes'. - * This struct is used to profile the normal fix. If the bit_fixP is a - * valid pointer (not NULL) the bit_fix data will be used to format the fix. - */ -bit_fixS *bit_fix_new(size, offset, min, max, add, base_type, base_adj) -char size; /* Length of bitfield */ -char offset; /* Bit offset to bitfield */ -long base_type; /* 0 or 1, if 1 it's exploded to opcode ptr */ -long base_adj; -long min; /* Signextended min for bitfield */ -long max; /* Signextended max for bitfield */ -long add; /* Add mask, used for huffman prefix */ -{ - register bit_fixS * bit_fixP; - - bit_fixP = (bit_fixS *)obstack_alloc(¬es,sizeof(bit_fixS)); - - bit_fixP->fx_bit_size = size; - bit_fixP->fx_bit_offset = offset; - bit_fixP->fx_bit_base = base_type; - bit_fixP->fx_bit_base_adj = base_adj; - bit_fixP->fx_bit_max = max; - bit_fixP->fx_bit_min = min; - bit_fixP->fx_bit_add = add; - - return(bit_fixP); -} - -void - fix_new_ns32k(frag, where, size, add_symbol, sub_symbol, offset, pcrel, - pcrel_adjust, im_disp, bit_fixP, bsr, r_type) -fragS *frag; /* Which frag? */ -int where; /* Where in that frag? */ -int size; /* 1, 2 or 4 usually. */ -symbolS *add_symbol; /* X_add_symbol. */ -symbolS *sub_symbol; /* X_subtract_symbol. */ -long offset; /* X_add_number. */ -int pcrel; /* TRUE if PC-relative relocation. */ -char pcrel_adjust; /* not zero if adjustment of pcrel offset is needed */ -char im_disp; /* true if the value to write is a displacement */ -bit_fixS *bit_fixP; /* pointer at struct of bit_fix's, ignored if NULL */ -char bsr; /* sequent-linker-hack: 1 when relocobject is a bsr */ -int r_type; /* Relocation type */ - -{ -#ifdef PIC - fixS *fixP = fix_new(frag, where, size, add_symbol, sub_symbol, - offset, pcrel, r_type, NULL); -#else - fixS *fixP = fix_new(frag, where, size, add_symbol, sub_symbol, - offset, pcrel, r_type); -#endif /* PIC */ - fixP->fx_pcrel_adjust = pcrel_adjust; - fixP->fx_im_disp = im_disp; - fixP->fx_bit_fixP = bit_fixP; - fixP->fx_bsr = bsr; -#ifdef PIC - if (r_type == RELOC_GLOB_DAT) - add_symbol->sy_forceout = 1; -#endif /* PIC */ -} /* fix_new_ns32k() */ - -/* We have no need to default values of symbols. */ - -symbolS * - md_undefined_symbol (name) -char *name; -{ - return 0; -} - -/* Parse an operand that is machine-specific. - We just return without modifying the expression if we have nothing - to do. */ - -/* ARGSUSED */ -void - md_operand (expressionP) -expressionS *expressionP; -{ -} - -/* Round up a section size to the appropriate boundary. */ -long - md_section_align (segment, size) -segT segment; -long size; -{ - return size; /* Byte alignment is fine */ -} - -/* Exactly what point is a PC-relative offset relative TO? - On the National warts, they're relative to the address of the offset, - with some funny adjustments in some circumstances during blue moons. - (??? Is this right? FIXME-SOON) */ -long - md_pcrel_from (fixP) -fixS *fixP; -{ - long res; - res = fixP->fx_where + fixP->fx_frag->fr_address; -#ifdef TE_SEQUENT - if (fixP->fx_frag->fr_bsr) - res += 0x12; /* FOO Kludge alert! */ -#endif - return(res); -} - -/* - * Local Variables: - * comment-column: 0 - * End: - */ - -/* end of tc-ns32k.c */ |