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toolchain: gccgo: fix building gccgo compiler

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Fixes FS#1498.  "gccgo -static" can fail for missing linker flag
-lgcc_eh caused by patch 850-use_shared_libgcc.patch

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
This commit is contained in:
Yousong Zhou 2018-05-07 11:50:45 +08:00
parent e495a05069
commit f172456edc
2 changed files with 248 additions and 0 deletions
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175
toolchain/gcc/patches/7.3.0/931-libffi-fix-MIPS-softfloat-build-issue.patch Normal file
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@ -0,0 +1,175 @@
From c0c62fa4256f805389f16ebfc4a60cf789129b50 Mon Sep 17 00:00:00 2001
From: BangLang Huang <banglang.huang@foxmail.com>
Date: Wed, 9 Nov 2016 10:36:49 +0800
Subject: [PATCH] libffi: fix MIPS softfloat build issue
Backported from github.com/libffi/libffi#272
Signed-off-by: BangLang Huang <banglang.huang@foxmail.com>
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
---
libffi/src/mips/n32.S | 17 +++++++++++++++++
libffi/src/mips/o32.S | 17 +++++++++++++++++
2 files changed, 34 insertions(+)
diff --git a/libffi/src/mips/n32.S b/libffi/src/mips/n32.S
index c6985d30a6f..8f25994773c 100644
--- a/libffi/src/mips/n32.S
+++ b/libffi/src/mips/n32.S
@@ -107,6 +107,16 @@ loadregs:
REG_L t6, 3*FFI_SIZEOF_ARG($fp) # load the flags word into t6.
+#ifdef __mips_soft_float
+ REG_L a0, 0*FFI_SIZEOF_ARG(t9)
+ REG_L a1, 1*FFI_SIZEOF_ARG(t9)
+ REG_L a2, 2*FFI_SIZEOF_ARG(t9)
+ REG_L a3, 3*FFI_SIZEOF_ARG(t9)
+ REG_L a4, 4*FFI_SIZEOF_ARG(t9)
+ REG_L a5, 5*FFI_SIZEOF_ARG(t9)
+ REG_L a6, 6*FFI_SIZEOF_ARG(t9)
+ REG_L a7, 7*FFI_SIZEOF_ARG(t9)
+#else
and t4, t6, ((1<<FFI_FLAG_BITS)-1)
REG_L a0, 0*FFI_SIZEOF_ARG(t9)
beqz t4, arg1_next
@@ -193,6 +203,7 @@ arg7_next:
arg8_doublep:
l.d $f19, 7*FFI_SIZEOF_ARG(t9)
arg8_next:
+#endif
callit:
# Load the function pointer
@@ -214,6 +225,7 @@ retint:
b epilogue
retfloat:
+#ifndef __mips_soft_float
bne t6, FFI_TYPE_FLOAT, retdouble
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
@@ -272,6 +284,7 @@ retstruct_f_d:
s.s $f0, 0(t4)
s.d $f2, 8(t4)
b epilogue
+#endif
retstruct_d_soft:
bne t6, FFI_TYPE_STRUCT_D_SOFT, retstruct_f_soft
@@ -429,6 +442,7 @@ ffi_closure_N32:
REG_S a6, A6_OFF2($sp)
REG_S a7, A7_OFF2($sp)
+#ifndef __mips_soft_float
# Store all possible float/double registers.
s.d $f12, F12_OFF2($sp)
s.d $f13, F13_OFF2($sp)
@@ -438,6 +452,7 @@ ffi_closure_N32:
s.d $f17, F17_OFF2($sp)
s.d $f18, F18_OFF2($sp)
s.d $f19, F19_OFF2($sp)
+#endif
# Call ffi_closure_mips_inner_N32 to do the real work.
LA t9, ffi_closure_mips_inner_N32
@@ -458,6 +473,7 @@ cls_retint:
b cls_epilogue
cls_retfloat:
+#ifndef __mips_soft_float
bne v0, FFI_TYPE_FLOAT, cls_retdouble
l.s $f0, V0_OFF2($sp)
b cls_epilogue
@@ -500,6 +516,7 @@ cls_retstruct_f_d:
l.s $f0, V0_OFF2($sp)
l.d $f2, V1_OFF2($sp)
b cls_epilogue
+#endif
cls_retstruct_small2:
REG_L v0, V0_OFF2($sp)
diff --git a/libffi/src/mips/o32.S b/libffi/src/mips/o32.S
index eb279813a76..1aff4b14814 100644
--- a/libffi/src/mips/o32.S
+++ b/libffi/src/mips/o32.S
@@ -82,13 +82,16 @@ sixteen:
ADDU $sp, 4 * FFI_SIZEOF_ARG # adjust $sp to new args
+#ifndef __mips_soft_float
bnez t0, pass_d # make it quick for int
+#endif
REG_L a0, 0*FFI_SIZEOF_ARG($sp) # just go ahead and load the
REG_L a1, 1*FFI_SIZEOF_ARG($sp) # four regs.
REG_L a2, 2*FFI_SIZEOF_ARG($sp)
REG_L a3, 3*FFI_SIZEOF_ARG($sp)
b call_it
+#ifndef __mips_soft_float
pass_d:
bne t0, FFI_ARGS_D, pass_f
l.d $f12, 0*FFI_SIZEOF_ARG($sp) # load $fp regs from args
@@ -130,6 +133,7 @@ pass_f_d:
# bne t0, FFI_ARGS_F_D, call_it
l.s $f12, 0*FFI_SIZEOF_ARG($sp) # load $fp regs from args
l.d $f14, 2*FFI_SIZEOF_ARG($sp) # passing double and float
+#endif
call_it:
# Load the function pointer
@@ -158,14 +162,23 @@ retfloat:
bne t2, FFI_TYPE_FLOAT, retdouble
jalr t9
REG_L t0, SIZEOF_FRAME + 4*FFI_SIZEOF_ARG($fp)
+#ifndef __mips_soft_float
s.s $f0, 0(t0)
+#else
+ REG_S v0, 0(t0)
+#endif
b epilogue
retdouble:
bne t2, FFI_TYPE_DOUBLE, noretval
jalr t9
REG_L t0, SIZEOF_FRAME + 4*FFI_SIZEOF_ARG($fp)
+#ifndef __mips_soft_float
s.d $f0, 0(t0)
+#else
+ REG_S v1, 4(t0)
+ REG_S v0, 0(t0)
+#endif
b epilogue
noretval:
@@ -261,9 +274,11 @@ $LCFI7:
li $13, 1 # FFI_O32
bne $16, $13, 1f # Skip fp save if FFI_O32_SOFT_FLOAT
+#ifndef __mips_soft_float
# Store all possible float/double registers.
s.d $f12, FA_0_0_OFF2($fp)
s.d $f14, FA_1_0_OFF2($fp)
+#endif
1:
# Call ffi_closure_mips_inner_O32 to do the work.
la t9, ffi_closure_mips_inner_O32
@@ -281,6 +296,7 @@ $LCFI7:
li $13, 1 # FFI_O32
bne $16, $13, 1f # Skip fp restore if FFI_O32_SOFT_FLOAT
+#ifndef __mips_soft_float
li $9, FFI_TYPE_FLOAT
l.s $f0, V0_OFF2($fp)
beq $8, $9, closure_done
@@ -288,6 +304,7 @@ $LCFI7:
li $9, FFI_TYPE_DOUBLE
l.d $f0, V0_OFF2($fp)
beq $8, $9, closure_done
+#endif
1:
REG_L $3, V1_OFF2($fp)
REG_L $2, V0_OFF2($fp)
--
2.16.3

73
toolchain/gcc/patches/7.3.0/960-gotools-fix-compilation-when-making-cross-compiler.patch Normal file
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@ -0,0 +1,73 @@
From dda6b050cd74a352670787a294596a9c56c21327 Mon Sep 17 00:00:00 2001
From: Yousong Zhou <yszhou4tech@gmail.com>
Date: Fri, 4 May 2018 18:20:53 +0800
Subject: [PATCH] gotools: fix compilation when making cross compiler
libgo is "the runtime support library for the Go programming language.
This library is intended for use with the Go frontend."
gccgo will link target files with libgo.so which depends on libgcc_s.so.1, but
the linker will complain that it cannot find it. That's because shared libgcc
is not present in the install directory yet. libgo.so was made without problem
because gcc will emit -lgcc_s when compiled with -shared option. When gotools
were being made, it was supplied with -static-libgcc thus no link option was
provided. Check LIBGO in gcc/go/gcc-spec.c for how gccgo make a builtin spec
for linking with libgo.so
- GccgoCrossCompilation, https://github.com/golang/go/wiki/GccgoCrossCompilation
- Cross-building instructions, http://www.eglibc.org/archives/patches/msg00078.html
When 3-pass GCC compilation is used, shared libgcc runtime libraries will be
available after gcc pass2 completed and will meet the gotools link requirement
at gcc pass3
---
gotools/Makefile.am | 4 +++-
gotools/Makefile.in | 4 +++-
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/gotools/Makefile.am b/gotools/Makefile.am
index 5f3940a278b..9c22f5df103 100644
--- a/gotools/Makefile.am
+++ b/gotools/Makefile.am
@@ -26,6 +26,7 @@ PWD_COMMAND = $${PWDCMD-pwd}
STAMP = echo timestamp >
libgodir = ../$(target_noncanonical)/libgo
+libgccdir = ../$(target_noncanonical)/libgcc
LIBGODEP = $(libgodir)/libgo.la
if NATIVE
@@ -38,7 +39,8 @@ endif
GOCFLAGS = $(CFLAGS_FOR_TARGET)
GOCOMPILE = $(GOCOMPILER) $(GOCFLAGS)
-AM_LDFLAGS = -L $(libgodir) -L $(libgodir)/.libs
+AM_LDFLAGS = -L $(libgodir) -L $(libgodir)/.libs \
+ -L $(libgccdir) -L $(libgccdir)/.libs -lgcc_s
GOLINK = $(GOCOMPILER) $(GOCFLAGS) $(AM_GOCFLAGS) $(LDFLAGS) $(AM_LDFLAGS) -o $@
cmdsrcdir = $(srcdir)/../libgo/go/cmd
diff --git a/gotools/Makefile.in b/gotools/Makefile.in
index 4386576b011..0bdd9290e01 100644
--- a/gotools/Makefile.in
+++ b/gotools/Makefile.in
@@ -252,13 +252,15 @@ mkinstalldirs = $(SHELL) $(toplevel_srcdir)/mkinstalldirs
PWD_COMMAND = $${PWDCMD-pwd}
STAMP = echo timestamp >
libgodir = ../$(target_noncanonical)/libgo
+libgccdir = ../$(target_noncanonical)/libgcc
LIBGODEP = $(libgodir)/libgo.la
@NATIVE_FALSE@GOCOMPILER = $(GOC)
# Use the compiler we just built.
@NATIVE_TRUE@GOCOMPILER = $(GOC_FOR_TARGET) $(XGCC_FLAGS_FOR_TARGET)
GOCOMPILE = $(GOCOMPILER) $(GOCFLAGS)
-AM_LDFLAGS = -L $(libgodir) -L $(libgodir)/.libs
+AM_LDFLAGS = -L $(libgodir) -L $(libgodir)/.libs \
+ -L $(libgccdir) -L $(libgccdir)/.libs -lgcc_s
GOLINK = $(GOCOMPILER) $(GOCFLAGS) $(AM_GOCFLAGS) $(LDFLAGS) $(AM_LDFLAGS) -o $@
cmdsrcdir = $(srcdir)/../libgo/go/cmd
go_cmd_go_files = \
--
2.16.3