bc3e6ded65
GCC optimizes big switches with sse so we could clobber users floating
point registers when they would do a syscall
Reproducer:
```
#include <stdio.h>
#include <stdlib.h>
union num {
float f;
unsigned long long i;
};
#define WORKSIZE (1024 * 1024 * 32)
int main(int argc, char **argv) {
char *work = malloc(WORKSIZE);
char *fromaddr;
char sink;
union num r;
unsigned long long int offset;
r.f = drand48();
printf("r: %llx\n", (long long)r.i);
offset = (long long int)(r.f * (double)WORKSIZE);
fromaddr = work + offset;
printf("%e %llx %llx\n", r.f, offset, fromaddr);
sink = *fromaddr;
return 0;
}
```
Change-Id: I7bb0883ec8ef2f245ab98064e308025422afc115
86 lines
2.4 KiB
Makefile
86 lines
2.4 KiB
Makefile
# Makefile.build.in COPYRIGHT FUJITSU LIMITED 2015-2016
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ARCH = @ARCH@
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VPATH=@abs_srcdir@
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SRC=$(VPATH)
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IHKDIR=$(IHKBASE)/$(TARGETDIR)
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OBJS = init.o mem.o debug.o mikc.o listeners.o ap.o syscall.o cls.o host.o
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OBJS += process.o copy.o waitq.o futex.o timer.o plist.o fileobj.o shmobj.o
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OBJS += zeroobj.o procfs.o devobj.o sysfs.o xpmem.o profile.o freeze.o
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OBJS += rbtree.o
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OBJS += pager.o
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# POSTK_DEBUG_ARCH_DEP_18 coredump arch separation.
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DEPSRCS=$(wildcard $(SRC)/*.c)
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# OBJS added gencore.o
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ifeq ($(ARCH), arm64)
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OBJS += gencore.o
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DEPSRCS += $(SRC)/../arch/arm64/kernel/gencore.c
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endif
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CFLAGS += -I$(SRC)/include -I@abs_builddir@/../ -I@abs_builddir@/include -D__KERNEL__ -g -fno-omit-frame-pointer -fno-inline -fno-inline-small-functions
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ifneq ($(ARCH), arm64)
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CFLAGS += -mcmodel=large -mno-red-zone -mno-sse
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endif
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LDFLAGS += -e arch_start
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IHKOBJ = ihk/ihk.o
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# POSTK_DEBUG_ARCH_DEP_24
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ifeq ($(ARCH), arm64)
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default: all
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endif
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ifeq ($(ARCH), arm64)
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include @abs_builddir@/config/config.$(TARGET)
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else
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include $(SRC)/config/config.$(TARGET)
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endif
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include @abs_builddir@/../../ihk/cokernel/Makefile.common
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# CFLAGS += -I$(SRC)/../arch/$(IHKARCH)/kernel/include -I$(SRC)/../lib/include
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OBJDUMP ?= objdump
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OBJCOPY ?= objcopy
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# POSTK_DEBUG_ARCH_DEP_26
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ifeq ($(ARCH), arm64)
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SUBCMD_OPTS = TARGET=$(TARGET) O=$(CURDIR)/ihk CC=$(CC) LD=$(LD) OBJCOPY=$(OBJCOPY) SRC=$(SRC) ARCH=$(ARCH)
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else
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SUBCMD_OPTS = TARGET=$(TARGET) O=$(CURDIR)/ihk CC=$(CC) LD=$(LD) SRC=$(SRC)
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endif
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ld_kern_cmd_base = $(LD) $(LDFLAGS) -o $@.elf $^
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mkimage_cmd_base = [ -f $(SRC)/script/mkimage.$(TARGET) ] && CC=$(CC) LD=$(LD) LDFLAGS="$(LDFLAGS_MKIMAGE)" OBJDUMP=$(OBJDUMP) OBJCOPY=$(OBJCOPY) sh $(SRC)/script/mkimage.$(TARGET) '$@.elf' '$@' '$(SRC)' || cp $@.elf $@
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ld_kern_cmd = $(call echo_cmd,LDKERN,$@)$(ld_kern_cmd_base)
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mkimage_cmd = $(call echo_cmd,MKIMAGE,$@)$(mkimage_cmd_base)
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all: depend kernel.img
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kernel.img: $(OBJS) $(IHKOBJ)
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$(ld_kern_cmd)
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$(mkimage_cmd)
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clean:
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$(rm_cmd) $(OBJS) kernel.img kernel.img.elf Makefile.dep
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@$(submake) -C $(IHKBASE) $(SUBCMD_OPTS) clean
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depend: Makefile.dep
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Makefile.dep:
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$(call dep_cmd,$(DEPSRCS))
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$(IHKOBJ): FORCE
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@mkdir -p $(dir $(IHKOBJ))
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+$(call echo_cmd,BUILD IHK,$(TARGET))$(submake) -C $(IHKBASE) $(SUBCMD_OPTS) prepare
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+$(call echo_cmd,BUILD IHK,$(TARGET))$(submake) -C $(IHKBASE) $(SUBCMD_OPTS)
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%.o: $(SRC)/%.c
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$(cc_cmd)
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gencore.o: ../arch/arm64/kernel/gencore.c
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$(cc_cmd)
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FORCE:
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-include Makefile.dep
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