toolchain: gccgo: fix building gccgo compiler
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>
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Yousong Zhou
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2 changed files with 248 additions and 0 deletions
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@ -0,0 +1,175 @@
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From c0c62fa4256f805389f16ebfc4a60cf789129b50 Mon Sep 17 00:00:00 2001
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From: BangLang Huang <banglang.huang@foxmail.com>
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Date: Wed, 9 Nov 2016 10:36:49 +0800
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Subject: [PATCH] libffi: fix MIPS softfloat build issue
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Backported from github.com/libffi/libffi#272
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Signed-off-by: BangLang Huang <banglang.huang@foxmail.com>
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Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
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---
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libffi/src/mips/n32.S | 17 +++++++++++++++++
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libffi/src/mips/o32.S | 17 +++++++++++++++++
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2 files changed, 34 insertions(+)
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diff --git a/libffi/src/mips/n32.S b/libffi/src/mips/n32.S
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index c6985d30a6f..8f25994773c 100644
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--- a/libffi/src/mips/n32.S
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+++ b/libffi/src/mips/n32.S
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@@ -107,6 +107,16 @@ loadregs:
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REG_L t6, 3*FFI_SIZEOF_ARG($fp) # load the flags word into t6.
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+#ifdef __mips_soft_float
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+ REG_L a0, 0*FFI_SIZEOF_ARG(t9)
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+ REG_L a1, 1*FFI_SIZEOF_ARG(t9)
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+ REG_L a2, 2*FFI_SIZEOF_ARG(t9)
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+ REG_L a3, 3*FFI_SIZEOF_ARG(t9)
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+ REG_L a4, 4*FFI_SIZEOF_ARG(t9)
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+ REG_L a5, 5*FFI_SIZEOF_ARG(t9)
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+ REG_L a6, 6*FFI_SIZEOF_ARG(t9)
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+ REG_L a7, 7*FFI_SIZEOF_ARG(t9)
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+#else
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and t4, t6, ((1<<FFI_FLAG_BITS)-1)
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REG_L a0, 0*FFI_SIZEOF_ARG(t9)
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beqz t4, arg1_next
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@@ -193,6 +203,7 @@ arg7_next:
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arg8_doublep:
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l.d $f19, 7*FFI_SIZEOF_ARG(t9)
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arg8_next:
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+#endif
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callit:
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# Load the function pointer
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@@ -214,6 +225,7 @@ retint:
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b epilogue
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retfloat:
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+#ifndef __mips_soft_float
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bne t6, FFI_TYPE_FLOAT, retdouble
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jal t9
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REG_L t4, 4*FFI_SIZEOF_ARG($fp)
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@@ -272,6 +284,7 @@ retstruct_f_d:
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s.s $f0, 0(t4)
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s.d $f2, 8(t4)
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b epilogue
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+#endif
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retstruct_d_soft:
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bne t6, FFI_TYPE_STRUCT_D_SOFT, retstruct_f_soft
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@@ -429,6 +442,7 @@ ffi_closure_N32:
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REG_S a6, A6_OFF2($sp)
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REG_S a7, A7_OFF2($sp)
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+#ifndef __mips_soft_float
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# Store all possible float/double registers.
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s.d $f12, F12_OFF2($sp)
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s.d $f13, F13_OFF2($sp)
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@@ -438,6 +452,7 @@ ffi_closure_N32:
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s.d $f17, F17_OFF2($sp)
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s.d $f18, F18_OFF2($sp)
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s.d $f19, F19_OFF2($sp)
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+#endif
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# Call ffi_closure_mips_inner_N32 to do the real work.
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LA t9, ffi_closure_mips_inner_N32
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@@ -458,6 +473,7 @@ cls_retint:
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b cls_epilogue
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cls_retfloat:
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+#ifndef __mips_soft_float
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bne v0, FFI_TYPE_FLOAT, cls_retdouble
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l.s $f0, V0_OFF2($sp)
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b cls_epilogue
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@@ -500,6 +516,7 @@ cls_retstruct_f_d:
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l.s $f0, V0_OFF2($sp)
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l.d $f2, V1_OFF2($sp)
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b cls_epilogue
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+#endif
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cls_retstruct_small2:
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REG_L v0, V0_OFF2($sp)
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diff --git a/libffi/src/mips/o32.S b/libffi/src/mips/o32.S
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index eb279813a76..1aff4b14814 100644
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--- a/libffi/src/mips/o32.S
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+++ b/libffi/src/mips/o32.S
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@@ -82,13 +82,16 @@ sixteen:
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ADDU $sp, 4 * FFI_SIZEOF_ARG # adjust $sp to new args
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+#ifndef __mips_soft_float
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bnez t0, pass_d # make it quick for int
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+#endif
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REG_L a0, 0*FFI_SIZEOF_ARG($sp) # just go ahead and load the
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REG_L a1, 1*FFI_SIZEOF_ARG($sp) # four regs.
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REG_L a2, 2*FFI_SIZEOF_ARG($sp)
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REG_L a3, 3*FFI_SIZEOF_ARG($sp)
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b call_it
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+#ifndef __mips_soft_float
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pass_d:
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bne t0, FFI_ARGS_D, pass_f
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l.d $f12, 0*FFI_SIZEOF_ARG($sp) # load $fp regs from args
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@@ -130,6 +133,7 @@ pass_f_d:
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# bne t0, FFI_ARGS_F_D, call_it
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l.s $f12, 0*FFI_SIZEOF_ARG($sp) # load $fp regs from args
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l.d $f14, 2*FFI_SIZEOF_ARG($sp) # passing double and float
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+#endif
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call_it:
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# Load the function pointer
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@@ -158,14 +162,23 @@ retfloat:
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bne t2, FFI_TYPE_FLOAT, retdouble
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jalr t9
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REG_L t0, SIZEOF_FRAME + 4*FFI_SIZEOF_ARG($fp)
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+#ifndef __mips_soft_float
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s.s $f0, 0(t0)
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+#else
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+ REG_S v0, 0(t0)
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+#endif
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b epilogue
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retdouble:
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bne t2, FFI_TYPE_DOUBLE, noretval
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jalr t9
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REG_L t0, SIZEOF_FRAME + 4*FFI_SIZEOF_ARG($fp)
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+#ifndef __mips_soft_float
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s.d $f0, 0(t0)
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+#else
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+ REG_S v1, 4(t0)
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+ REG_S v0, 0(t0)
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+#endif
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b epilogue
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noretval:
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@@ -261,9 +274,11 @@ $LCFI7:
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li $13, 1 # FFI_O32
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bne $16, $13, 1f # Skip fp save if FFI_O32_SOFT_FLOAT
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+#ifndef __mips_soft_float
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# Store all possible float/double registers.
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s.d $f12, FA_0_0_OFF2($fp)
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s.d $f14, FA_1_0_OFF2($fp)
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+#endif
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1:
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# Call ffi_closure_mips_inner_O32 to do the work.
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la t9, ffi_closure_mips_inner_O32
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@@ -281,6 +296,7 @@ $LCFI7:
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li $13, 1 # FFI_O32
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bne $16, $13, 1f # Skip fp restore if FFI_O32_SOFT_FLOAT
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+#ifndef __mips_soft_float
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li $9, FFI_TYPE_FLOAT
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l.s $f0, V0_OFF2($fp)
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beq $8, $9, closure_done
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@@ -288,6 +304,7 @@ $LCFI7:
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li $9, FFI_TYPE_DOUBLE
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l.d $f0, V0_OFF2($fp)
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beq $8, $9, closure_done
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+#endif
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1:
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REG_L $3, V1_OFF2($fp)
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REG_L $2, V0_OFF2($fp)
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--
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2.16.3
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@ -0,0 +1,73 @@
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From dda6b050cd74a352670787a294596a9c56c21327 Mon Sep 17 00:00:00 2001
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From: Yousong Zhou <yszhou4tech@gmail.com>
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Date: Fri, 4 May 2018 18:20:53 +0800
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Subject: [PATCH] gotools: fix compilation when making cross compiler
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libgo is "the runtime support library for the Go programming language.
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This library is intended for use with the Go frontend."
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gccgo will link target files with libgo.so which depends on libgcc_s.so.1, but
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the linker will complain that it cannot find it. That's because shared libgcc
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is not present in the install directory yet. libgo.so was made without problem
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because gcc will emit -lgcc_s when compiled with -shared option. When gotools
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were being made, it was supplied with -static-libgcc thus no link option was
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provided. Check LIBGO in gcc/go/gcc-spec.c for how gccgo make a builtin spec
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for linking with libgo.so
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- GccgoCrossCompilation, https://github.com/golang/go/wiki/GccgoCrossCompilation
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- Cross-building instructions, http://www.eglibc.org/archives/patches/msg00078.html
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When 3-pass GCC compilation is used, shared libgcc runtime libraries will be
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available after gcc pass2 completed and will meet the gotools link requirement
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at gcc pass3
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---
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gotools/Makefile.am | 4 +++-
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gotools/Makefile.in | 4 +++-
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2 files changed, 6 insertions(+), 2 deletions(-)
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diff --git a/gotools/Makefile.am b/gotools/Makefile.am
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index 5f3940a278b..9c22f5df103 100644
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--- a/gotools/Makefile.am
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+++ b/gotools/Makefile.am
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@@ -26,6 +26,7 @@ PWD_COMMAND = $${PWDCMD-pwd}
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STAMP = echo timestamp >
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libgodir = ../$(target_noncanonical)/libgo
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+libgccdir = ../$(target_noncanonical)/libgcc
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LIBGODEP = $(libgodir)/libgo.la
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if NATIVE
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@@ -38,7 +39,8 @@ endif
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GOCFLAGS = $(CFLAGS_FOR_TARGET)
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GOCOMPILE = $(GOCOMPILER) $(GOCFLAGS)
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-AM_LDFLAGS = -L $(libgodir) -L $(libgodir)/.libs
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+AM_LDFLAGS = -L $(libgodir) -L $(libgodir)/.libs \
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+ -L $(libgccdir) -L $(libgccdir)/.libs -lgcc_s
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GOLINK = $(GOCOMPILER) $(GOCFLAGS) $(AM_GOCFLAGS) $(LDFLAGS) $(AM_LDFLAGS) -o $@
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cmdsrcdir = $(srcdir)/../libgo/go/cmd
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diff --git a/gotools/Makefile.in b/gotools/Makefile.in
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index 4386576b011..0bdd9290e01 100644
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--- a/gotools/Makefile.in
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+++ b/gotools/Makefile.in
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@@ -252,13 +252,15 @@ mkinstalldirs = $(SHELL) $(toplevel_srcdir)/mkinstalldirs
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PWD_COMMAND = $${PWDCMD-pwd}
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STAMP = echo timestamp >
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libgodir = ../$(target_noncanonical)/libgo
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+libgccdir = ../$(target_noncanonical)/libgcc
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LIBGODEP = $(libgodir)/libgo.la
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@NATIVE_FALSE@GOCOMPILER = $(GOC)
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# Use the compiler we just built.
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@NATIVE_TRUE@GOCOMPILER = $(GOC_FOR_TARGET) $(XGCC_FLAGS_FOR_TARGET)
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GOCOMPILE = $(GOCOMPILER) $(GOCFLAGS)
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-AM_LDFLAGS = -L $(libgodir) -L $(libgodir)/.libs
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+AM_LDFLAGS = -L $(libgodir) -L $(libgodir)/.libs \
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+ -L $(libgccdir) -L $(libgccdir)/.libs -lgcc_s
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GOLINK = $(GOCOMPILER) $(GOCFLAGS) $(AM_GOCFLAGS) $(LDFLAGS) $(AM_LDFLAGS) -o $@
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cmdsrcdir = $(srcdir)/../libgo/go/cmd
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go_cmd_go_files = \
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--
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2.16.3
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