From: Ian Lance Taylor <iant@golang.org>
Date: Tue, 10 Jun 2014 21:11:39 +0000 (-0700)
Subject: cmd/ld: fix PC deltas in DWARF line number table
X-Git-Tag: go1.4beta1~1324
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=507afa68c5a3ce37a824288d19d8b8b0918a1530;p=gostls13.git

cmd/ld: fix PC deltas in DWARF line number table

The putpclcdelta function set the DWARF line number PC to
s->value + pcline->pc, which is correct, but the code then set
the local variable pc to epc, which can be a different value.
This caused the next delta in the DWARF table to be wrong.

Fixes #8098.

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/104950045
---

diff --git a/src/cmd/ld/dwarf.c b/src/cmd/ld/dwarf.c
index cee591ffa6..cc77b45cd6 100644
--- a/src/cmd/ld/dwarf.c
+++ b/src/cmd/ld/dwarf.c
@@ -1624,13 +1624,13 @@ writelines(void)
 			}
 			putpclcdelta(s->value + pcline.pc - pc, pcline.value - line);
 
-			pc = epc;
+			pc = s->value + pcline.pc;
+			line = pcline.value;
 			if(pcfile.nextpc < pcline.nextpc)
 				epc = pcfile.nextpc;
 			else
 				epc = pcline.nextpc;
 			epc += s->value;
-			line = pcline.value;
 		}
 
 		da = 0;