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gcc: Backport fix for a segfault on riscv

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seen during kernel compile

(From OE-Core rev: 908cf4d624d54f0dc46f5f5cc1879b89e1640692)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Khem Raj
2017-10-09 12:58:36 -07:00
committed by Richard Purdie
parent ede79dea7c
commit 775f599f5c
2 changed files with 52 additions and 0 deletions
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meta/recipes-devtools/gcc/gcc-7.2.inc
+1
View File
@@ -74,6 +74,7 @@ SRC_URI = "\
file://0047-sync-gcc-stddef.h-with-musl.patch \
file://0048-gcc-Enable-static-PIE.patch \
file://fix-segmentation-fault-precompiled-hdr.patch \
file://0050-RISC-V-Handle-non-legitimate-address-in-riscv_legiti.patch \
${BACKPORTS} \
"
BACKPORTS = "\
meta/recipes-devtools/gcc/gcc-7.2/0050-RISC-V-Handle-non-legitimate-address-in-riscv_legiti.patch
+51
View File
@@ -0,0 +1,51 @@
From 16210e6270e200cd4892a90ecef608906be3a130 Mon Sep 17 00:00:00 2001
From: Kito Cheng <kito.cheng@gmail.com>
Date: Thu, 4 May 2017 02:11:13 +0800
Subject: [PATCH] RISC-V: Handle non-legitimate address in
riscv_legitimize_move
GCC may generate non-legitimate address due to we allow some
load/store with non-legitimate address in pic.md.
2017-05-12 Kito Cheng <kito.cheng@gmail.com>
* config/riscv/riscv.c (riscv_legitimize_move): Handle
non-legitimate address.
---
Upstream-Status: Backport
Signed-off-by: Khem Raj <raj.khem@gmail.com>
gcc/ChangeLog | 5 +++++
gcc/config/riscv/riscv.c | 16 ++++++++++++++++
2 files changed, 21 insertions(+)
diff --git a/gcc/config/riscv/riscv.c b/gcc/config/riscv/riscv.c
index f7fec4bfcf8..d519be1659a 100644
--- a/gcc/config/riscv/riscv.c
+++ b/gcc/config/riscv/riscv.c
@@ -1385,6 +1385,22 @@ riscv_legitimize_move (enum machine_mode mode, rtx dest, rtx src)
return true;
}
+ /* RISC-V GCC may generate non-legitimate address due to we provide some
+ pattern for optimize access PIC local symbol and it's make GCC generate
+ unrecognizable instruction during optmizing. */
+
+ if (MEM_P (dest) && !riscv_legitimate_address_p (mode, XEXP (dest, 0),
+ reload_completed))
+ {
+ XEXP (dest, 0) = riscv_force_address (XEXP (dest, 0), mode);
+ }
+
+ if (MEM_P (src) && !riscv_legitimate_address_p (mode, XEXP (src, 0),
+ reload_completed))
+ {
+ XEXP (src, 0) = riscv_force_address (XEXP (src, 0), mode);
+ }
+
return false;
}
--
2.14.2