https://sourceware.org/bugzilla/show_bug.cgi?id=21441
Bug ID: 21441
Summary: Unnecessary padding of .eh_frame section
Product: binutils
Version: 2.29 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
[hjl@gnu-6 eh-frame-1]$ cat foo.s
.text
.globl foo
.type foo, %function
foo:
.cfi_startproc
.cfi_endproc
.size foo, .-foo
[hjl@gnu-6 eh-frame-1]$ cat bar.s
.text
.globl bar
.type bar, %function
bar:
.cfi_startproc
.byte 0x90
.cfi_endproc
.size bar, .-bar
[hjl@gnu-6 eh-frame-1]$ make
as -o foo.o foo.s
as -o bar.o bar.s
./ld -shared -o foo.so foo.o bar.o
./ld -shared -o bar.so bar.o foo.o
readelf -w foo.so > foo.eh
readelf -w bar.so > bar.eh
diff -up foo.eh bar.eh
--- foo.eh 2017-04-27 12:30:43.466685231 -0700
+++ bar.eh 2017-04-27 12:30:43.467685234 -0700
@@ -13,7 +13,11 @@ Contents of the .eh_frame section:
DW_CFA_nop
DW_CFA_nop
-00000018 0000000000000010 0000001c FDE cie=00000000
pc=0000000000000201..0000000000000202
+00000018 0000000000000014 0000001c FDE cie=00000000
pc=0000000000000201..0000000000000202
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
DW_CFA_nop
DW_CFA_nop
DW_CFA_nop
Makefile:6: recipe for target 'all' failed
make: *** [all] Error 1
[hjl@gnu-6 eh-frame-1]$
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