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authorDavid Faust <david.faust@oracle.com>2020-09-17 10:42:57 +0100
committerNick Clifton <nickc@redhat.com>2020-09-17 10:42:57 +0100
commit538c131ec2d588e685e3eb6c94dbe3be84ef75dd (patch)
tree50834ac82d2d8f556294130fc022ecf73fb05b88
parent2c77a3dc8f1bb66c9c5604c1677fb303944d2b1d (diff)
downloadbinutils-gdb-538c131ec2d588e685e3eb6c94dbe3be84ef75dd.tar.gz
Use the correct no-op ocode for the BPF assembler.
* config/tc-bpf.h (md_single_noop_insn): Use 'ja 0' for no-op.
-rw-r--r--gas/ChangeLog7
-rw-r--r--gas/config/tc-bpf.h4
2 files changed, 10 insertions, 1 deletions
diff --git a/gas/ChangeLog b/gas/ChangeLog
index ded38623435..ec4bea89dcc 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,6 +1,13 @@
2020-09-15 Nick Clifton <nickc@redhat.com>
Import from mainline:
+ 2020-09-15 David Faust <david.faust@oracle.com>
+
+ * config/tc-bpf.h (md_single_noop_insn): Use 'ja 0' for no-op.
+
+2020-09-15 Nick Clifton <nickc@redhat.com>
+
+ Import from mainline:
2020-09-14 Nick Clifton <nickc@redhat.com>
* read.c (s_nop): New function. Handles the .nop directive.
diff --git a/gas/config/tc-bpf.h b/gas/config/tc-bpf.h
index cb02d6c1338..e7e505cfaa5 100644
--- a/gas/config/tc-bpf.h
+++ b/gas/config/tc-bpf.h
@@ -48,4 +48,6 @@
/* Values passed to md_apply_fix don't include the symbol value. */
#define MD_APPLY_SYM_VALUE(FIX) 0
-#define md_single_noop_insn "mov %r1,%r1"
+/* The Linux kernel verifier expects NOPs to be encoded in this way;
+ a jump to offset 0 means jump to the next instruction. */
+#define md_single_noop_insn "ja 0"