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/* $OpenBSD: code.c,v 1.4 2007/12/22 13:13:27 stefan Exp $ */
/*
* Copyright (c) 2006 Anders Magnusson (ragge@ludd.luth.se).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
# include "pass1.h"
/*
* cause the alignment to become a multiple of n
* never called for text segment.
*/
void
defalign(int n)
{
/* alignment are always correct */
}
/*
* define the current location as the name p->sname
* never called for text segment.
*/
void
defnam(struct symtab *p)
{
char *c = p->sname;
#ifdef GCC_COMPAT
c = gcc_findname(p);
#endif
if (p->sclass == EXTDEF)
printf(" .globl %s\n", c);
printf("%s:\n", c);
}
/*
* code for the end of a function
* deals with struct return here
*/
void
efcode()
{
NODE *p, *q;
int sz;
if (cftnsp->stype != STRTY+FTN && cftnsp->stype != UNIONTY+FTN)
return;
cerror("efcode");
/* address of return struct is in eax */
/* create a call to memcpy() */
/* will get the result in eax */
p = block(REG, NIL, NIL, CHAR+PTR, 0, MKSUE(CHAR+PTR));
// p->n_rval = EAX;
q = block(OREG, NIL, NIL, CHAR+PTR, 0, MKSUE(CHAR+PTR));
// q->n_rval = EBP;
q->n_lval = 8; /* return buffer offset */
p = block(CM, q, p, INT, 0, MKSUE(INT));
sz = (tsize(STRTY, cftnsp->sdf, cftnsp->ssue)+SZCHAR-1)/SZCHAR;
p = block(CM, p, bcon(sz), INT, 0, MKSUE(INT));
p->n_right->n_name = "";
p = block(CALL, bcon(0), p, CHAR+PTR, 0, MKSUE(CHAR+PTR));
p->n_left->n_name = "memcpy";
p = clocal(p);
send_passt(IP_NODE, p);
}
/*
* code for the beginning of a function; a is an array of
* indices in symtab for the arguments; n is the number
*/
void
bfcode(struct symtab **a, int n)
{
int i;
if (cftnsp->stype != STRTY+FTN && cftnsp->stype != UNIONTY+FTN)
return;
cerror("bfcode");
/* Function returns struct, adjust arg offset */
for (i = 0; i < n; i++)
a[i]->soffset += SZPOINT(INT);
}
/*
* by now, the automatics and register variables are allocated
*/
void
bccode()
{
SETOFF(autooff, SZINT);
}
/* called just before final exit */
/* flag is 1 if errors, 0 if none */
void
ejobcode(int flag )
{
}
void
bjobcode()
{
}
/*
* Print character t at position i in one string, until t == -1.
* Locctr & label is already defined.
*/
void
bycode(int t, int i)
{
static int lastoctal = 0;
/* put byte i+1 in a string */
if (t < 0) {
if (i != 0)
puts("\"");
} else {
if (i == 0)
printf("\t.ascii \"");
if (t == '\\' || t == '"') {
lastoctal = 0;
putchar('\\');
putchar(t);
} else if (t < 040 || t >= 0177) {
lastoctal++;
printf("\\%o",t);
} else if (lastoctal && '0' <= t && t <= '9') {
lastoctal = 0;
printf("\"\n\t.ascii \"%c", t);
} else {
lastoctal = 0;
putchar(t);
}
}
}
/*
* return the alignment of field of type t
*/
int
fldal(unsigned int t)
{
uerror("illegal field type");
return(ALINT);
}
/* fix up type of field p */
void
fldty(struct symtab *p)
{
}
/*
* XXX - fix genswitch.
*/
int
mygenswitch(int num, TWORD type, struct swents **p, int n)
{
return 0;
}
/*
* Called with a function call with arguments as argument.
* This is done early in buildtree() and only done once.
*/
NODE *
funcode(NODE *p)
{
return p;
}
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