This patch adds support for a new option -mxbpf. This tells GCC to
generate code for an expanded version of BPF that relaxes some of the
restrictions imposed by BPF.
(cherry pick of 51e10276d6792f67f1d88d90f299e7ac1b1f1f24)
2020-05-19 Jose E. Marchesi <jose.march...@oracle.com>
gcc/
* config/bpf/bpf.opt (mxbpf): New option.
* doc/invoke.texi (Option Summary): Add -mxbpf.
(eBPF Options): Document -mxbbpf.
---
gcc/config/bpf/bpf.opt | 6 ++++++
gcc/doc/invoke.texi | 6 +++++-
2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/gcc/config/bpf/bpf.opt b/gcc/config/bpf/bpf.opt
index 78b93c55575..6aa858408f1 100644
--- a/gcc/config/bpf/bpf.opt
+++ b/gcc/config/bpf/bpf.opt
@@ -108,6 +108,12 @@ Enum(bpf_kernel) String(5.1) Value(LINUX_V5_1)
EnumValue
Enum(bpf_kernel) String(5.2) Value(LINUX_V5_2)
+; Use xBPF extensions.
+
+mxbpf
+Target Report Mask(XBPF)
+Generate xBPF.
+
; Selecting big endian or little endian targets.
mbig-endian
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 4dc64ffe9dd..3cbf7640bbf 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -863,7 +863,7 @@ Objective-C and Objective-C++ Dialects}.
@emph{eBPF Options}
@gccoptlist{-mbig-endian -mlittle-endian -mkernel=@var{version}
--mframe-limit=@var{bytes}}
+-mframe-limit=@var{bytes} -mxbpf}
@emph{FR30 Options}
@gccoptlist{-msmall-model -mno-lsim}
@@ -21045,6 +21045,10 @@ Generate code for a big-endian target.
@item -mlittle-endian
@opindex mlittle-endian
Generate code for a little-endian target. This is the default.
+
+@item -mxbpf
+Generate code for an expanded version of BPF, which relaxes some of
+the restrictions imposed by the BPF architecture.
@end table
@node FR30 Options
--
2.25.0.2.g232378479e
