diff options
| -rw-r--r-- | arch/x86/config.mk | 7 | ||||
| -rw-r--r-- | arch/x86/lib/Makefile | 6 | ||||
| -rw-r--r-- | arch/x86/lib/gcc.c | 38 |
3 files changed, 51 insertions, 0 deletions
diff --git a/arch/x86/config.mk b/arch/x86/config.mk index fe9083f..23cacff 100644 --- a/arch/x86/config.mk +++ b/arch/x86/config.mk @@ -41,3 +41,10 @@ PLATFORM_RELFLAGS += -ffunction-sections -fvisibility=hidden PLATFORM_LDFLAGS += --emit-relocs -Bsymbolic -Bsymbolic-functions LDFLAGS_FINAL += --gc-sections -pie +LDFLAGS_FINAL += --wrap=__divdi3 --wrap=__udivdi3 +LDFLAGS_FINAL += --wrap=__moddi3 --wrap=__umoddi3 + +NORMAL_LIBGCC = $(shell $(CC) $(CFLAGS) -print-libgcc-file-name) +PREFIXED_LIBGCC = $(OBJTREE)/arch/$(ARCH)/lib/$(shell basename $(NORMAL_LIBGCC)) + +export USE_PRIVATE_LIBGCC=$(shell dirname $(PREFIXED_LIBGCC)) diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile index 90f3283..d584aa4 100644 --- a/arch/x86/lib/Makefile +++ b/arch/x86/lib/Makefile @@ -32,6 +32,7 @@ SOBJS-$(CONFIG_SYS_X86_REALMODE) += realmode_switch.o COBJS-$(CONFIG_SYS_PC_BIOS) += bios_setup.o COBJS-y += board.o COBJS-y += bootm.o +COBJS-y += gcc.o COBJS-y += interrupts.o COBJS-$(CONFIG_SYS_PCAT_INTERRUPTS) += pcat_interrupts.o COBJS-$(CONFIG_SYS_GENERIC_TIMER) += pcat_timer.o @@ -50,6 +51,11 @@ OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y)) $(LIB): $(obj).depend $(OBJS) $(call cmd_link_o_target, $(OBJS)) +$(PREFIXED_LIBGCC): $(NORMAL_LIBGCC) + $(OBJCOPY) $< $@ --prefix-symbols=__normal_ + +$(LIB): $(PREFIXED_LIBGCC) + ######################################################################### # defines $(obj).depend target diff --git a/arch/x86/lib/gcc.c b/arch/x86/lib/gcc.c new file mode 100644 index 0000000..4043431 --- /dev/null +++ b/arch/x86/lib/gcc.c @@ -0,0 +1,38 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2009 coresystems GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 or later of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA + */ + +#ifdef __GNUC__ + +/* + * GCC's libgcc handling is quite broken. While the libgcc functions + * are always regparm(0) the code that calls them uses whatever the + * compiler call specifies. Therefore we need a wrapper around those + * functions. See gcc bug PR41055 for more information. + */ +#define WRAP_LIBGCC_CALL(type, name) \ + type __normal_##name(type a, type b) __attribute__((regparm(0))); \ + type __wrap_##name(type a, type b); \ + type __wrap_##name(type a, type b) { return __normal_##name(a, b); } + +WRAP_LIBGCC_CALL(long long, __divdi3) +WRAP_LIBGCC_CALL(unsigned long long, __udivdi3) +WRAP_LIBGCC_CALL(long long, __moddi3) +WRAP_LIBGCC_CALL(unsigned long long, __umoddi3) + +#endif |