From af12feb8d514b5970c984be61b07c56e0e72b2ce Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Sun, 19 Sep 2010 22:10:34 -0400
Subject: 6l, 8l: clean up ELF code, fix NaCl

R=r
CC=golang-dev
https://golang.org/cl/2221042
---
 src/cmd/8l/span.c | 59 ++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 48 insertions(+), 11 deletions(-)

(limited to 'src/cmd/8l/span.c')

diff --git a/src/cmd/8l/span.c b/src/cmd/8l/span.c
index 373ab8a9c6..105d18b9f8 100644
--- a/src/cmd/8l/span.c
+++ b/src/cmd/8l/span.c
@@ -35,9 +35,10 @@ void
 span(void)
 {
 	Prog *p, *q;
-	int32 i, v, c, idat;
+	int32 i, v, c, idat, etext, rodata, erodata;
 	int m, n, again;
 	Sym *s;
+	Section *sect;
 
 	xdefine("etext", STEXT, 0L);
 	xdefine("rodata", SRODATA, 0L);
@@ -110,13 +111,16 @@ start:
 		textsize = c;
 		n++;
 	}while(again);
-	xdefine("etext", STEXT, c);
+	etext = c;
+	c += textpad;
 	
 	/*
 	 * allocate read-only data to the text segment.
 	 */
+	if(HEADTYPE == 8)
+		c = rnd(c, INITRND);
 	c = rnd(c, 8);
-	xdefine("rodata", SRODATA, c);
+	rodata = c;
 	for(i=0; i<NHASH; i++)
 	for(s = hash[i]; s != S; s = s->link) {
 		if(s->type != SRODATA)
@@ -127,22 +131,59 @@ start:
 		s->value = c;
 		c += v;
 	}
-	xdefine("erodata", SRODATA, c);
+	erodata = c;
 
 	if(INITRND) {
-		INITDAT = rnd(c+textpad, INITRND);
+		INITDAT = rnd(c, INITRND);
 		if(INITDAT != idat) {
 			idat = INITDAT;
 			goto start;
 		}
 	}
 
+	xdefine("etext", STEXT, etext);
+	xdefine("rodata", SRODATA, rodata);
+	xdefine("erodata", SRODATA, erodata);
+
 	if(debug['v'])
 		Bprint(&bso, "etext = %lux\n", c);
 	Bflush(&bso);
 	for(p = textp; p != P; p = p->pcond)
 		p->from.sym->value = p->pc;
 	textsize = c - INITTEXT;
+
+	segtext.rwx = 05;
+	if(HEADTYPE == 8) {
+		segtext.vaddr = INITTEXT;
+		segtext.len = rodata - INITTEXT;
+		segtext.fileoff = HEADR;
+		segtext.filelen = etext - INITTEXT;
+
+		segrodata.rwx = 04;
+		segrodata.vaddr = rodata;
+		segrodata.len = erodata - rodata;
+		segrodata.filelen = segrodata.len;
+	} else {
+		segtext.vaddr = INITTEXT - HEADR;
+		segtext.len = INITDAT - INITTEXT + HEADR;
+		segtext.fileoff = 0;
+		segtext.filelen = segtext.len;
+	}
+
+	sect = addsection(&segtext, ".text", 05);
+	sect->vaddr = INITTEXT;
+	sect->len = etext - sect->vaddr;
+	
+	if(HEADTYPE == 8)
+		sect = addsection(&segrodata, ".rodata", 04);
+	else
+		sect = addsection(&segtext, ".rodata", 04);
+	sect->vaddr = rodata;
+	sect->len = erodata - rodata;
+
+	segdata.vaddr += INITDAT;
+	for(sect=segdata.sect; sect!=nil; sect=sect->next)
+		sect->vaddr += INITDAT;
 }
 
 void
@@ -151,12 +192,8 @@ xdefine(char *p, int t, int32 v)
 	Sym *s;
 
 	s = lookup(p, 0);
-	if(s->type == 0 || s->type == SXREF) {
-		s->type = t;
-		s->value = v;
-	}
-	if(s->type == STEXT && s->value == 0)
-		s->value = v;
+	s->type = t;
+	s->value = v;
 }
 
 void
-- 
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