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boost: build context for mips64

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It turns out there's upstream support for it. A small patch is needed
to fix softfloat support.

Also added patch to fix boost-fiber on octeon+. Failure happens because
the platform is based on an old MIPSr2 standard that lacks the pause
instruction.

It also turns out that MIPS64 builds are done with the wrong ABI.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
This commit is contained in:
Rosen Penev 2021-02-12 18:06:06 -08:00
parent c87d337c1b
commit 7b360868ff
3 changed files with 84 additions and 3 deletions
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6
libs/boost/Makefile
View file

@ -13,7 +13,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=boost
PKG_VERSION:=1.75.0
PKG_SOURCE_VERSION:=1_75_0
PKG_RELEASE:=1
PKG_RELEASE:=2
PKG_SOURCE:=$(PKG_NAME)_$(PKG_SOURCE_VERSION).tar.bz2
PKG_SOURCE_URL:=@SF/$(PKG_NAME)/$(PKG_NAME)/$(PKG_VERSION) https://dl.bintray.com/boostorg/release/$(PKG_VERSION)/source/
@ -117,7 +117,7 @@ define Package/boost/config
# Invisible config dependency
config boost-context-exclude
bool
default y if (TARGET_arc770 || TARGET_archs38 || TARGET_octeon || TARGET_octeontx)
default y if (TARGET_arc770 || TARGET_archs38)
default n
config boost-coroutine-exclude
@ -387,7 +387,7 @@ EXTRA_CXXFLAGS += $(if $(CONFIG_GCC_USE_VERSION_10),-std=gnu++20,$(if $(CONFIG_G
ifneq ($(findstring mips,$(ARCH)),)
BOOST_ABI = o32
ifneq ($(findstring 64,$(ARCH)),)
BOOST_ABI = o64
BOOST_ABI = n64
endif
else ifneq ($(findstring arm,$(ARCH)),)
BOOST_ABI = aapcs

70
libs/boost/patches/010-mips64.patch Normal file
View file

@ -0,0 +1,70 @@
--- a/libs/context/src/asm/jump_mips64_n64_elf_gas.S
+++ b/libs/context/src/asm/jump_mips64_n64_elf_gas.S
@@ -67,7 +67,7 @@ jump_fcontext:
sd $ra, 144($sp) # save RA
sd $ra, 152($sp) # save RA as PC
-
+#if defined(__mips_hard_float)
s.d $f24, 0($sp) # save F24
s.d $f25, 8($sp) # save F25
s.d $f26, 16($sp) # save F26
@@ -76,6 +76,7 @@ jump_fcontext:
s.d $f29, 40($sp) # save F29
s.d $f30, 48($sp) # save F30
s.d $f31, 56($sp) # save F31
+#endif
# store SP (pointing to old context-data) in v0 as return
move $v0, $sp
@@ -83,6 +84,7 @@ jump_fcontext:
# get SP (pointing to new context-data) from a0 param
move $sp, $a0
+#if defined(__mips_hard_float)
l.d $f24, 0($sp) # restore F24
l.d $f25, 8($sp) # restore F25
l.d $f26, 16($sp) # restore F26
@@ -91,6 +93,7 @@ jump_fcontext:
l.d $f29, 40($sp) # restore F29
l.d $f30, 48($sp) # restore F30
l.d $f31, 56($sp) # restore F31
+#endif
ld $s0, 64($sp) # restore S0
ld $s1, 72($sp) # restore S1
--- a/libs/context/src/asm/ontop_mips64_n64_elf_gas.S
+++ b/libs/context/src/asm/ontop_mips64_n64_elf_gas.S
@@ -67,7 +67,7 @@ ontop_fcontext:
sd $ra, 144($sp) # save RA
sd $ra, 152($sp) # save RA as PC
-
+#if defined(__mips_hard_float)
s.d $f24, 0($sp) # save F24
s.d $f25, 8($sp) # save F25
s.d $f26, 16($sp) # save F26
@@ -76,6 +76,7 @@ ontop_fcontext:
s.d $f29, 40($sp) # save F29
s.d $f30, 48($sp) # save F30
s.d $f31, 56($sp) # save F31
+#endif
# store SP (pointing to context-data) in t0
move $t0, $sp
@@ -83,6 +84,7 @@ ontop_fcontext:
# restore SP (pointing to context-data) from a0
move $sp, $a0
+#if defined(__mips_hard_float)
l.d $f24, 0($sp) # restore F24
l.d $f25, 8($sp) # restore F25
l.d $f26, 16($sp) # restore F26
@@ -91,6 +93,7 @@ ontop_fcontext:
l.d $f29, 40($sp) # restore F29
l.d $f30, 48($sp) # restore F30
l.d $f31, 56($sp) # restore F31
+#endif
ld $s0, 64($sp) # restore S0
ld $s1, 72($sp) # restore S1

11
libs/boost/patches/020-mips64-fiber.patch Normal file
View file

@ -0,0 +1,11 @@
--- a/boost/fiber/detail/cpu_relax.hpp
+++ b/boost/fiber/detail/cpu_relax.hpp
@@ -47,7 +47,7 @@ namespace detail {
# else
# define cpu_relax() asm volatile ("nop" ::: "memory");
# endif
-#elif BOOST_ARCH_MIPS && (__mips_isa_rev > 1)
+#elif BOOST_ARCH_MIPS && (__mips_isa_rev > 1) && !defined(_MIPS_ARCH_OCTEONP)
# define cpu_relax() asm volatile ("pause" ::: "memory");
#elif BOOST_ARCH_PPC
// http://code.metager.de/source/xref/gnu/glibc/sysdeps/powerpc/sys/platform/ppc.h