objdump: implement disassembly

There is some duplication here with cmd/nm.
There is a TODO to address that after 1.3 is out.

Update #7452

x86 disassembly works and is tested.

The arm disassembler does not exist yet
and is therefore not yet hooked up.

LGTM=crawshaw, iant
R=crawshaw, iant
CC=golang-codereviews
https://golang.org/cl/91360046

1 files changed, 7 insertions, 0 deletions

diff --git a/src/cmd/objdump/testdata/fmthello.go b/src/cmd/objdump/testdata/fmthello.go
new file mode 100644
index 0000000000..635db7ae6c
--- /dev/null
+++ b/src/cmd/objdump/testdata/fmthello.go
@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("hello, world")
+}