minix/commands/i386/gas2ack/emit_ack.c

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/* emit_ack.c - emit ACK assembly Author: Kees J. Bot
* emit NCC assembly 27 Dec 1993
*/
#define nil 0
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <assert.h>
#include "asmconv.h"
#include "token.h"
#include "asm86.h"
#include "languages.h"
#include "globals.h"
typedef struct mnemonic { /* ACK as86 mnemonics translation table. */
opcode_t opcode;
char *name;
} mnemonic_t;
static mnemonic_t mnemtab[] = {
{ AAA, "aaa" },
{ AAD, "aad" },
{ AAM, "aam" },
{ AAS, "aas" },
{ ADC, "adc%" },
{ ADD, "add%" },
{ AND, "and%" },
{ ARPL, "arpl" },
{ BOUND, "bound" },
{ BSF, "bsf" },
{ BSR, "bsr" },
{ BSWAP, "bswap" },
{ BT, "bt" },
{ BTC, "btc" },
{ BTR, "btr" },
{ BTS, "bts" },
{ CALL, "call" },
{ CALLF, "callf" },
{ CBW, "cbw" },
{ CLC, "clc" },
{ CLD, "cld" },
{ CLI, "cli" },
{ CLTS, "clts" },
{ CMC, "cmc" },
{ CMP, "cmp%" },
{ CMPS, "cmps%" },
{ CMPXCHG, "cmpxchg" },
{ CWD, "cwd" },
{ DAA, "daa" },
{ DAS, "das" },
{ DEC, "dec%" },
{ DIV, "div%" },
{ DOT_ALIGN, ".align" },
{ DOT_ASCII, ".ascii" },
{ DOT_ASCIZ, ".asciz" },
{ DOT_ASSERT, ".assert" },
{ DOT_BASE, ".base" },
{ DOT_BSS, ".sect .bss" },
{ DOT_COMM, ".comm" },
{ DOT_DATA, ".sect .data" },
{ DOT_DATA1, ".data1" },
{ DOT_DATA2, ".data2" },
{ DOT_DATA4, ".data4" },
{ DOT_DEFINE, ".define" },
{ DOT_END, ".sect .end" },
{ DOT_EXTERN, ".extern" },
{ DOT_FILE, ".file" },
{ DOT_LCOMM, ".comm" },
{ DOT_LINE, ".line" },
{ DOT_LIST, ".list" },
{ DOT_NOLIST, ".nolist" },
{ DOT_ROM, ".sect .rom" },
{ DOT_SPACE, ".space" },
{ DOT_SYMB, ".symb" },
{ DOT_TEXT, ".sect .text" },
{ DOT_USE16, ".use16" },
{ DOT_USE32, ".use32" },
{ ENTER, "enter" },
{ F2XM1, "f2xm1" },
{ FABS, "fabs" },
{ FADD, "fadd" },
{ FADDD, "faddd" },
{ FADDP, "faddp" },
{ FADDS, "fadds" },
{ FBLD, "fbld" },
{ FBSTP, "fbstp" },
{ FCHS, "fchs" },
{ FCLEX, "fclex" },
{ FCOMD, "fcomd" },
{ FCOMPD, "fcompd" },
{ FCOMPP, "fcompp" },
{ FCOMPS, "fcomps" },
{ FCOMS, "fcoms" },
{ FCOS, "fcos" },
{ FDECSTP, "fdecstp" },
{ FDIVD, "fdivd" },
{ FDIVP, "fdivp" },
{ FDIVRD, "fdivrd" },
{ FDIVRP, "fdivrp" },
{ FDIVRS, "fdivrs" },
{ FDIVS, "fdivs" },
{ FFREE, "ffree" },
{ FIADDL, "fiaddl" },
{ FIADDS, "fiadds" },
{ FICOM, "ficom" },
{ FICOMP, "ficomp" },
{ FIDIVL, "fidivl" },
{ FIDIVRL, "fidivrl" },
{ FIDIVRS, "fidivrs" },
{ FIDIVS, "fidivs" },
{ FILDL, "fildl" },
{ FILDQ, "fildq" },
{ FILDS, "filds" },
{ FIMULL, "fimull" },
{ FIMULS, "fimuls" },
{ FINCSTP, "fincstp" },
{ FINIT, "finit" },
{ FISTL, "fistl" },
{ FISTP, "fistp" },
{ FISTS, "fists" },
{ FISUBL, "fisubl" },
{ FISUBRL, "fisubrl" },
{ FISUBRS, "fisubrs" },
{ FISUBS, "fisubs" },
{ FLD1, "fld1" },
{ FLDCW, "fldcw" },
{ FLDD, "fldd" },
{ FLDENV, "fldenv" },
{ FLDL2E, "fldl2e" },
{ FLDL2T, "fldl2t" },
{ FLDLG2, "fldlg2" },
{ FLDLN2, "fldln2" },
{ FLDPI, "fldpi" },
{ FLDS, "flds" },
{ FLDX, "fldx" },
{ FLDZ, "fldz" },
{ FMULD, "fmuld" },
{ FMULP, "fmulp" },
{ FMULS, "fmuls" },
{ FNINIT, "fninit" },
{ FNOP, "fnop" },
{ FNSAVE, "fnsave" },
{ FNSTCW, "fnstcw" },
{ FNSTSW, "fnstsw" },
{ FPATAN, "fpatan" },
{ FPREM, "fprem" },
{ FPREM1, "fprem1" },
{ FPTAN, "fptan" },
{ FRNDINT, "frndint" },
{ FRSTOR, "frstor" },
{ FSAVE, "fsave" },
{ FWAIT, "fwait" },
{ FXRSTOR, "fxrstor" },
{ FXSAVE, "fxsave" },
{ FSCALE, "fscale" },
{ FSIN, "fsin" },
{ FSINCOS, "fsincos" },
{ FSQRT, "fsqrt" },
{ FSTCW, "fstcw" },
{ FSTD, "fstd" },
{ FSTENV, "fstenv" },
{ FSTPD, "fstpd" },
{ FSTPS, "fstps" },
{ FSTPX, "fstpx" },
{ FSTS, "fsts" },
{ FSTSW, "fstsw" },
{ FSUBD, "fsubd" },
{ FSUBP, "fsubp" },
{ FSUBPR, "fsubpr" },
{ FSUBRD, "fsubrd" },
{ FSUBRS, "fsubrs" },
{ FSUBS, "fsubs" },
{ FTST, "ftst" },
{ FUCOM, "fucom" },
{ FUCOMP, "fucomp" },
{ FUCOMPP, "fucompp" },
{ FXAM, "fxam" },
{ FXCH, "fxch" },
{ FXTRACT, "fxtract" },
{ FYL2X, "fyl2x" },
{ FYL2XP1, "fyl2xp1" },
{ HLT, "hlt" },
{ IDIV, "idiv%" },
{ IMUL, "imul%" },
{ IN, "in%" },
{ INC, "inc%" },
{ INS, "ins%" },
{ INT, "int" },
{ INTO, "into" },
{ INVD, "invd" },
{ INVLPG, "invlpg" },
{ IRET, "iret" },
{ IRETD, "iretd" },
{ JA, "ja" },
{ JAE, "jae" },
{ JB, "jb" },
{ JBE, "jbe" },
{ JCXZ, "jcxz" },
{ JE, "je" },
{ JG, "jg" },
{ JGE, "jge" },
{ JL, "jl" },
{ JLE, "jle" },
{ JMP, "jmp" },
{ JMPF, "jmpf" },
{ JNE, "jne" },
{ JNO, "jno" },
{ JNP, "jnp" },
{ JNS, "jns" },
{ JO, "jo" },
{ JP, "jp" },
{ JS, "js" },
{ LAHF, "lahf" },
{ LAR, "lar" },
{ LDS, "lds" },
{ LEA, "lea" },
{ LEAVE, "leave" },
{ LES, "les" },
{ LFS, "lfs" },
{ LGDT, "lgdt" },
{ LGS, "lgs" },
{ LIDT, "lidt" },
{ LLDT, "lldt" },
{ LMSW, "lmsw" },
{ LOCK, "lock" },
{ LODS, "lods%" },
{ LOOP, "loop" },
{ LOOPE, "loope" },
{ LOOPNE, "loopne" },
{ LSL, "lsl" },
{ LSS, "lss" },
{ LTR, "ltr" },
{ MFENCE, ".data1 0x0f, 0xae, 0x0f"},
{ MOV, "mov%" },
{ MOVS, "movs%" },
{ MOVSX, "movsx" },
{ MOVSXB, "movsxb" },
{ MOVZX, "movzx" },
{ MOVZXB, "movzxb" },
{ MUL, "mul%" },
{ NEG, "neg%" },
{ NOP, "nop" },
{ NOT, "not%" },
{ OR, "or%" },
{ OUT, "out%" },
{ OUTS, "outs%" },
{ PAUSE, ".data1 0xf3, 0x90"},
{ POP, "pop" },
{ POPA, "popa" },
{ POPAD, "popad" },
{ POPF, "popf" },
{ PUSH, "push" },
{ PUSHA, "pusha" },
{ PUSHAD, "pushad" },
{ PUSHF, "pushf" },
{ RCL, "rcl%" },
{ RCR, "rcr%" },
{ RET, "ret" },
{ RETF, "retf" },
{ RDMSR, ".data1 0x0f, 0x32"},
{ RDPMC, ".data1 0x0f, 0x33"},
{ RDTSC, ".data1 0x0f, 0x31"},
{ ROL, "rol%" },
{ ROR, "ror%" },
{ SAHF, "sahf" },
{ SAL, "sal%" },
{ SAR, "sar%" },
{ SBB, "sbb%" },
{ SCAS, "scas%" },
{ SETA, "seta" },
{ SETAE, "setae" },
{ SETB, "setb" },
{ SETBE, "setbe" },
{ SETE, "sete" },
{ SETG, "setg" },
{ SETGE, "setge" },
{ SETL, "setl" },
{ SETLE, "setle" },
{ SETNE, "setne" },
{ SETNO, "setno" },
{ SETNP, "setnp" },
{ SETNS, "setns" },
{ SETO, "seto" },
{ SETP, "setp" },
{ SETS, "sets" },
{ SGDT, "sgdt" },
{ SHL, "shl%" },
{ SHLD, "shld" },
{ SHR, "shr%" },
{ SHRD, "shrd" },
{ SIDT, "sidt" },
{ SLDT, "sldt" },
{ SMSW, "smsw" },
{ STC, "stc" },
{ STD, "std" },
{ STI, "sti" },
{ STOS, "stos%" },
{ STR, "str" },
{ SUB, "sub%" },
{ TEST, "test%" },
{ VERR, "verr" },
{ VERW, "verw" },
{ WAIT, "wait" },
{ WBINVD, "wbinvd" },
{ WRMSR, ".data1 0x0f, 0x30"},
{ XADD, "xadd" },
{ XCHG, "xchg%" },
{ XLAT, "xlat" },
{ XOR, "xor%" },
};
#define farjmp(o) ((o) == JMPF || (o) == CALLF)
static FILE *ef;
static long eline= 1;
static char *efile;
static char *orig_efile;
static char *opcode2name_tab[N_OPCODES];
static enum dialect { ACK, NCC } dialect= ACK;
static void ack_putchar(int c)
/* LOOK, this programmer checks the return code of putc! What an idiot, noone
* does that!
*/
{
if (putc(c, ef) == EOF) fatal(orig_efile);
}
static void ack_printf(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (vfprintf(ef, fmt, ap) == EOF) fatal(orig_efile);
va_end(ap);
}
void ack_emit_init(char *file, const char *banner)
/* Prepare producing an ACK assembly file. */
{
mnemonic_t *mp;
if (file == nil) {
file= "stdout";
ef= stdout;
} else {
if ((ef= fopen(file, "w")) == nil) fatal(file);
}
orig_efile= file;
efile= file;
ack_printf("! %s", banner);
if (dialect == ACK) {
/* Declare the four sections used under Minix. */
ack_printf(
"\n.sect .text; .sect .rom; .sect .data; .sect .bss\n.sect .text");
}
/* Initialize the opcode to mnemonic translation table. */
for (mp= mnemtab; mp < arraylimit(mnemtab); mp++) {
assert(opcode2name_tab[mp->opcode] == nil);
opcode2name_tab[mp->opcode]= mp->name;
}
}
#define opcode2name(op) (opcode2name_tab[op] + 0)
static void ack_put_string(const char *s, size_t n)
/* Emit a string with weird characters quoted. */
{
while (n > 0) {
int c= *s;
if (c < ' ' || c > 0177) {
ack_printf("\\%03o", c & 0xFF);
} else
if (c == '"' || c == '\\') {
ack_printf("\\%c", c);
} else {
ack_putchar(c);
}
s++;
n--;
}
}
static void ack_put_expression(asm86_t *a, expression_t *e, int deref)
/* Send an expression, i.e. instruction operands, to the output file. Deref
* is true when the rewrite for the ncc dialect may be made.
*/
{
int isglob;
assert(e != nil);
isglob = syms_is_global(e->name);
switch (e->operator) {
case ',':
if (dialect == NCC && farjmp(a->opcode)) {
/* ACK jmpf seg:off -> NCC jmpf off,seg */
ack_put_expression(a, e->right, deref);
ack_printf(", ");
ack_put_expression(a, e->left, deref);
} else {
ack_put_expression(a, e->left, deref);
ack_printf(farjmp(a->opcode) ? ":" : ", ");
ack_put_expression(a, e->right, deref);
}
break;
case 'O':
if (deref && a->optype == JUMP) ack_putchar('@');
if (e->left != nil) ack_put_expression(a, e->left, 0);
if (e->middle != nil) ack_put_expression(a, e->middle, 0);
if (e->right != nil) ack_put_expression(a, e->right, 0);
break;
case '(':
if (deref && a->optype == JUMP) ack_putchar('@');
if (!deref) ack_putchar('(');
ack_put_expression(a, e->middle, 0);
if (!deref) ack_putchar(')');
break;
case 'B':
ack_printf("(%s%s)", isglob ? "_" : "", e->name);
break;
case '1':
case '2':
case '4':
case '8':
ack_printf((use16() && e->operator == '1')
? "(%s%s)" : "(%s%s*%c)", isglob ? "_" : "",
e->name, e->operator);
break;
case '+':
case '-':
case '~':
if (e->middle != nil) {
if (deref && a->optype != JUMP) ack_putchar('#');
ack_putchar(e->operator);
ack_put_expression(a, e->middle, 0);
break;
}
/*FALL THROUGH*/
case '*':
case '/':
case '%':
case '&':
case '|':
case '^':
case S_LEFTSHIFT:
case S_RIGHTSHIFT:
if (deref && a->optype != JUMP) ack_putchar('#');
ack_put_expression(a, e->left, 0);
if (e->operator == S_LEFTSHIFT) {
ack_printf("<<");
} else
if (e->operator == S_RIGHTSHIFT) {
ack_printf(">>");
} else {
ack_putchar(e->operator);
}
ack_put_expression(a, e->right, 0);
break;
case '[':
if (deref && a->optype != JUMP) ack_putchar('#');
ack_putchar('[');
ack_put_expression(a, e->middle, 0);
ack_putchar(']');
break;
case 'W':
if (deref && a->optype == JUMP && isregister(e->name))
{
ack_printf("(%s)", e->name);
break;
}
if (deref && a->optype != JUMP && !isregister(e->name)) {
ack_putchar('#');
}
ack_printf("%s%s", isglob ? "_" : "", e->name);
break;
case 'S':
ack_putchar('"');
ack_put_string(e->name, e->len);
ack_putchar('"');
break;
default:
fprintf(stderr,
"asmconv: internal error, unknown expression operator '%d'\n",
e->operator);
exit(EXIT_FAILURE);
}
}
void ack_emit_instruction(asm86_t *a)
/* Output one instruction and its operands. */
{
int same= 0;
char *p;
static int high_seg;
int deref;
static int prevop;
if (a == nil) {
/* Last call */
ack_putchar('\n');
return;
}
/* Make sure the line number of the line to be emitted is ok. */
if ((a->file != efile && strcmp(a->file, efile) != 0)
|| a->line < eline || a->line > eline+10) {
ack_putchar('\n');
ack_printf("! %ld \"%s\"\n", a->line, a->file);
efile= a->file;
eline= a->line;
} else {
if (a->line == eline) {
if (prevop == DOT_LABEL) {
ack_printf("\n");
same = 0;
}
else {
ack_printf("; ");
same= 1;
}
}
while (eline < a->line) {
ack_putchar('\n');
eline++;
}
}
if (a->opcode == DOT_LABEL)
prevop = DOT_LABEL;
else
prevop = 0;
if (a->opcode == COMMENT ||
a->opcode == C_PREPROCESSOR ||
a->opcode == UNKNOWN) {
if (a->opcode == COMMENT)
if (a->raw_string[0] != '/')
a->raw_string[0] = '!';
ack_printf("%s", a->raw_string);
return;
} else
if (a->opcode == DOT_LABEL) {
assert(a->args->operator == ':');
if (syms_is_global(a->args->name))
ack_printf("_%s:", a->args->name);
else
ack_printf("%s:", a->args->name);
} else
if (a->opcode == DOT_EQU) {
assert(a->args->operator == '=');
ack_printf("\t%s = ", a->args->name);
ack_put_expression(a, a->args->middle, 0);
} else
if ((p= opcode2name(a->opcode)) != nil) {
char *sep= dialect == ACK ? "" : ";";
if (!is_pseudo(a->opcode) && !same) ack_putchar('\t');
switch (a->rep) {
case ONCE: break;
case REP: ack_printf("rep"); break;
case REPE: ack_printf("repe"); break;
case REPNE: ack_printf("repne"); break;
default: assert(0);
}
if (a->rep != ONCE) {
ack_printf(dialect == ACK ? " " : "; ");
}
switch (a->seg) {
case DEFSEG: break;
case CSEG: ack_printf("cseg"); break;
case DSEG: ack_printf("dseg"); break;
case ESEG: ack_printf("eseg"); break;
case FSEG: ack_printf("fseg"); break;
case GSEG: ack_printf("gseg"); break;
case SSEG: ack_printf("sseg"); break;
default: assert(0);
}
if (a->seg != DEFSEG) {
ack_printf(dialect == ACK ? " " : "; ");
}
if (a->oaz & OPZ) ack_printf(use16() ? "o32 " : "o16 ");
if (a->oaz & ADZ) ack_printf(use16() ? "a32 " : "a16 ");
if (a->opcode == CBW) {
p= !(a->oaz & OPZ) == use16() ? "cbw" : "cwde";
}
if (a->opcode == CWD) {
p= !(a->oaz & OPZ) == use16() ? "cwd" : "cdq";
}
if (a->opcode == DOT_COMM && a->args != nil
&& a->args->operator == ','
&& a->args->left->operator == 'W'
) {
if (syms_is_global(a->args->left->name))
ack_printf(".define\t_%s; ", a->args->left->name);
else
ack_printf(".define\t%s; ", a->args->left->name);
}
#define IS_OP_CR4(r) ((r) && (r)->name && strcmp((r)->name, "cr4") == 0)
/* unsupported mov to/from cr4 */
if (a->opcode == MOV && a->args->operator == ',') {
if (IS_OP_CR4(a->args->left)) {
/* read cr4 */
ack_printf(".data1 0x0f, 0x20, 0xe0\n");
return;
}
if (IS_OP_CR4(a->args->right)) {
/* write cr4 */
ack_printf(".data1 0x0f, 0x22, 0xe0\n");
return;
}
}
if (a->opcode == RDMSR) {
ack_printf(".data1 0x0f, 0x32\n");
return;
}
if (a->opcode == WRMSR) {
ack_printf(".data1 0x0f, 0x30\n");
}
/* unsupported fninit */
if (a->opcode == FNINIT) {
ack_printf(".data1 0xDB, 0xE3\n"); /* FNINIT */
return;
}
/* unsupported fnsave */
if (a->opcode == FNSAVE) {
ack_printf(".data1 0xDD, 0x30\n"); /* FNSAVE [eax] */
return;
}
/* unsupported fnstcw */
if (a->opcode == FNSTCW) {
ack_printf(".data1 0xD9, 0x38\n"); /* FNSTCW [eax] */
return;
}
/* unsupported fnstsw */
if (a->opcode == FNSTSW) {
ack_printf(".data1 0xDF, 0xE0\n"); /* FNSTSW [eax] */
return;
}
/* unsupported frstor */
if (a->opcode == FRSTOR) {
ack_printf(".data1 0xDD, 0x20\n"); /* FRSTOR [eax] */
return;
}
/* unsupported fwait */
if (a->opcode == FWAIT) {
ack_printf(".data1 0x9B\n"); /* FWAIT */
return;
}
/* unsupported fxrstor */
if (a->opcode == FXRSTOR) {
ack_printf(".data1 0x0F, 0xAE, 0x08\n"); /* FXRSTOR [eax] */
return;
}
/* unsupported fxsave */
if (a->opcode == FXSAVE) {
ack_printf(".data1 0x0F, 0xAE, 0x00\n"); /* FXSAVE [eax] */
return;
}
/* we are translating from GNU */
if (a->args && a->args->operator == ','
/* don't swap ljmp prefixed with segment */
&& a->opcode != JMPF) {
expression_t * tmp;
tmp = a->args->right;
a->args->right = a->args->left;
a->args->left = tmp;
}
while (*p != 0) {
if (*p == '%') {
if (a->optype == BYTE) ack_putchar('b');
} else {
ack_putchar(*p);
}
p++;
}
/*
* gnu assembly expresses the ES segment in the long instruction
* format. Not neccessary in ack
*/
if (a->opcode == MOVS)
return;
if (a->args != nil) {
ack_putchar('\t');
switch (a->opcode) {
case IN:
case OUT:
case INT:
deref= 0;
break;
default:
deref= (dialect == NCC && a->optype != PSEUDO);
}
ack_put_expression(a, a->args, deref);
}
if (a->opcode == DOT_USE16) set_use16();
if (a->opcode == DOT_USE32) set_use32();
} else {
fprintf(stderr,
"asmconv: internal error, unknown opcode '%d'\n",
a->opcode);
exit(EXIT_FAILURE);
}
/*
* comment on the same line as an instruction. Cannot be definition of a
* macro
* */
if (a->raw_string) {
if (a->raw_string[0] != '/')
a->raw_string[0] = '!';
ack_printf("\t%s", a->raw_string);
}
}
/* A few ncc mnemonics are different. */
static mnemonic_t ncc_mnemtab[] = {
{ DOT_BSS, ".bss" },
{ DOT_DATA, ".data" },
{ DOT_END, ".end" },
{ DOT_ROM, ".rom" },
{ DOT_TEXT, ".text" },
};
void ncc_emit_init(char *file, const char *banner)
/* The assembly produced by the Minix ACK ANSI C compiler for the 8086 is
* different from the normal ACK assembly, and different from the old K&R
* assembler. This brings us endless joy. (It was supposed to make
* translation of the assembly used by the old K&R assembler easier by
* not deviating too much from that dialect.)
*/
{
mnemonic_t *mp;
dialect= NCC;
ack_emit_init(file, banner);
/* Replace a few mnemonics. */
for (mp= ncc_mnemtab; mp < arraylimit(ncc_mnemtab); mp++) {
opcode2name_tab[mp->opcode]= mp->name;
}
}
void ncc_emit_instruction(asm86_t *a)
{
ack_emit_instruction(a);
}