1 files changed, 79 insertions, 0 deletions
diff --git a/user/rust/0008-Fix-powerpc64-ELFv2-big-endian-struct-passing-ABI.patch b/user/rust/0008-Fix-powerpc64-ELFv2-big-endian-struct-passing-ABI.patch
new file mode 100644
index 000000000..e21cae762
--- /dev/null
+++ b/user/rust/0008-Fix-powerpc64-ELFv2-big-endian-struct-passing-ABI.patch
@@ -0,0 +1,79 @@
+From 5dbfa6690a13f6959e81082e45c5bf8218239069 Mon Sep 17 00:00:00 2001
+From: Samuel Holland <samuel@sholland.org>
+Date: Sun, 16 Sep 2018 16:34:15 +0000
+Subject: [PATCH 08/24] Fix powerpc64 ELFv2 big-endian struct-passing ABI
+
+The requirements here are not "ELFv1" requirements, but big-endian
+requirements, as the extension or non-extension of the argument is
+necessary to put the argument in the correct half of the register.
+Parameter passing in the ELFv2 ABI needs these same transformations.
+Since this code makes no difference on little-endian machines, simplify
+it to use the same code path everywhere.
+---
+ src/librustc_target/abi/call/powerpc64.rs | 29 ++++++++++-------------
+ src/librustc_target/abi/mod.rs            |  2 +-
+ 2 files changed, 13 insertions(+), 18 deletions(-)
+
+diff --git a/src/librustc_target/abi/call/powerpc64.rs b/src/librustc_target/abi/call/powerpc64.rs
+index 0c5ec77a39..934d2b1138 100644
+--- a/src/librustc_target/abi/call/powerpc64.rs
++++ b/src/librustc_target/abi/call/powerpc64.rs
+@@ -75,7 +75,9 @@ fn classify_ret_ty<'a, Ty, C>(cx: C, ret: &mut ArgType<'a, Ty>, abi: ABI)
+     let size = ret.layout.size;
+     let bits = size.bits();
+     if bits <= 128 {
+-        let unit = if bits <= 8 {
++        let unit = if cx.data_layout().endian == Endian::Big {
++            Reg { kind: RegKind::Integer, size }
++        } else if bits <= 8 {
+             Reg::i8()
+         } else if bits <= 16 {
+             Reg::i16()
+@@ -110,22 +112,15 @@ fn classify_arg_ty<'a, Ty, C>(cx: C, arg: &mut ArgType<'a, Ty>, abi: ABI)
+     }
+ 
+     let size = arg.layout.size;
+-    let (unit, total) = match abi {
+-        ELFv1 => {
+-            // In ELFv1, aggregates smaller than a doubleword should appear in
+-            // the least-significant bits of the parameter doubleword.  The rest
+-            // should be padded at their tail to fill out multiple doublewords.
+-            if size.bits() <= 64 {
+-                (Reg { kind: RegKind::Integer, size }, size)
+-            } else {
+-                let align = Align::from_bits(64, 64).unwrap();
+-                (Reg::i64(), size.abi_align(align))
+-            }
+-        },
+-        ELFv2 => {
+-            // In ELFv2, we can just cast directly.
+-            (Reg::i64(), size)
+-        },
++    let (unit, total) = if size.bits() <= 64 {
++        // Aggregates smaller than a doubleword should appear in
++        // the least-significant bits of the parameter doubleword.
++        (Reg { kind: RegKind::Integer, size }, size)
++    } else {
++        // Aggregates larger than a doubleword should be padded
++        // at the tail to fill out a whole number of doublewords.
++        let align = Align::from_bits(64, 64).unwrap();
++        (Reg::i64(), size.abi_align(align))
+     };
+ 
+     arg.cast_to(Uniform {
+diff --git a/src/librustc_target/abi/mod.rs b/src/librustc_target/abi/mod.rs
+index 5c4cd849f8..bdbc592b6b 100644
+--- a/src/librustc_target/abi/mod.rs
++++ b/src/librustc_target/abi/mod.rs
+@@ -214,7 +214,7 @@ impl<'a> HasDataLayout for &'a TargetDataLayout {
+ }
+ 
+ /// Endianness of the target, which must match cfg(target-endian).
+-#[derive(Copy, Clone)]
++#[derive(Copy, Clone, PartialEq)]
+ pub enum Endian {
+     Little,
+     Big
+-- 
+2.18.0
+