diff options
| -rw-r--r-- | arch/um/Makefile | 2 | ||||
| -rw-r--r-- | arch/um/kernel/tt/Makefile | 15 | ||||
| -rw-r--r-- | arch/um/kernel/tt/unmap.c | 31 | ||||
| -rw-r--r-- | arch/um/kernel/uml.lds.S | 15 | ||||
| -rw-r--r-- | arch/um/scripts/Makefile.rules | 6 | ||||
| -rw-r--r-- | arch/um/scripts/Makefile.unmap | 22 | ||||
| -rw-r--r-- | arch/um/sys-i386/Makefile | 2 | ||||
| -rw-r--r-- | arch/um/sys-i386/unmap.c | 25 | ||||
| -rw-r--r-- | arch/um/sys-x86_64/Makefile | 2 | ||||
| -rw-r--r-- | arch/um/sys-x86_64/unmap.c | 25 |
10 files changed, 86 insertions, 59 deletions
diff --git a/arch/um/Makefile b/arch/um/Makefile index f2a0c40..3f07390 100644 --- a/arch/um/Makefile +++ b/arch/um/Makefile @@ -122,7 +122,7 @@ endif CPPFLAGS_vmlinux.lds = $(shell echo -U$(SUBARCH) \ -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \ -DELF_FORMAT=\"$(ELF_FORMAT)\" $(CPP_MODE-y) \ - -DKERNEL_STACK_SIZE=$(STACK_SIZE)) + -DKERNEL_STACK_SIZE=$(STACK_SIZE) -DSUBARCH=$(SUBARCH)) #The wrappers will select whether using "malloc" or the kernel allocator. LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc diff --git a/arch/um/kernel/tt/Makefile b/arch/um/kernel/tt/Makefile index c3faea2..3fd2554 100644 --- a/arch/um/kernel/tt/Makefile +++ b/arch/um/kernel/tt/Makefile @@ -3,10 +3,6 @@ # Licensed under the GPL # -extra-y := unmap_fin.o -targets := unmap.o -clean-files := unmap_tmp.o - obj-y = exec_kern.o exec_user.o gdb.o ksyms.o mem.o mem_user.o process_kern.o \ syscall_kern.o syscall_user.o time.o tlb.o tracer.o trap_user.o \ uaccess.o uaccess_user.o @@ -16,14 +12,3 @@ obj-$(CONFIG_PT_PROXY) += gdb_kern.o ptproxy/ USER_OBJS := gdb.o time.o tracer.o include arch/um/scripts/Makefile.rules - -UNMAP_CFLAGS := $(patsubst -pg -DPROFILING,,$(USER_CFLAGS)) -UNMAP_CFLAGS := $(patsubst -fprofile-arcs -ftest-coverage,,$(UNMAP_CFLAGS)) - -#XXX: partially copied from arch/um/scripts/Makefile.rules -$(obj)/unmap.o: c_flags = -Wp,-MD,$(depfile) $(UNMAP_CFLAGS) - -$(obj)/unmap_fin.o : $(obj)/unmap.o - $(LD) -r -o $(obj)/unmap_tmp.o $< $(shell $(CC) -print-file-name=libc.a) - $(OBJCOPY) $(obj)/unmap_tmp.o $@ -G switcheroo - diff --git a/arch/um/kernel/tt/unmap.c b/arch/um/kernel/tt/unmap.c deleted file mode 100644 index 3f7aecd..0000000 --- a/arch/um/kernel/tt/unmap.c +++ /dev/null @@ -1,31 +0,0 @@ -/* - * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <sys/mman.h> - -int switcheroo(int fd, int prot, void *from, void *to, int size) -{ - if(munmap(to, size) < 0){ - return(-1); - } - if(mmap(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) != to){ - return(-1); - } - if(munmap(from, size) < 0){ - return(-1); - } - return(0); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S index dd53555..61dfd4f 100644 --- a/arch/um/kernel/uml.lds.S +++ b/arch/um/kernel/uml.lds.S @@ -14,19 +14,10 @@ SECTIONS /* Used in arch/um/kernel/mem.c. Any memory between START and __binary_start * is remapped.*/ __binary_start = .; -#ifdef MODE_TT - .thread_private : { - __start_thread_private = .; - errno = .; - . += 4; - arch/um/kernel/tt/unmap_fin.o (.data) - __end_thread_private = .; - } - . = ALIGN(4096); - .remap : { arch/um/kernel/tt/unmap_fin.o (.text) } - /* We want it only if we are in MODE_TT. In both cases, however, when MODE_TT - * is off the resulting binary segfaults.*/ +#ifdef MODE_TT + .remap_data : { arch/um/sys-SUBARCH/unmap_fin.o (.data .bss) } + .remap : { arch/um/sys-SUBARCH/unmap_fin.o (.text) } . = ALIGN(4096); /* Init code and data */ #endif diff --git a/arch/um/scripts/Makefile.rules b/arch/um/scripts/Makefile.rules index 98346c7..7459d09 100644 --- a/arch/um/scripts/Makefile.rules +++ b/arch/um/scripts/Makefile.rules @@ -10,6 +10,12 @@ USER_OBJS := $(foreach file,$(USER_OBJS),$(obj)/$(file)) $(USER_OBJS) : c_flags = -Wp,-MD,$(depfile) $(USER_CFLAGS) \ $(CFLAGS_$(notdir $@)) +# The stubs and unmap.o can't try to call mcount or update basic block data +define unprofile + $(patsubst -pg,,$(patsubst -fprofile-arcs -ftest-coverage,,$(1))) +endef + + quiet_cmd_make_link = SYMLINK $@ cmd_make_link = ln -sf $(srctree)/arch/$(SUBARCH)/$($(notdir $@)-dir)/$(notdir $@) $@ diff --git a/arch/um/scripts/Makefile.unmap b/arch/um/scripts/Makefile.unmap new file mode 100644 index 0000000..37a8f97 --- /dev/null +++ b/arch/um/scripts/Makefile.unmap @@ -0,0 +1,22 @@ +clean-files += unmap_tmp.o unmap_fin.o unmap.o + +ifdef CONFIG_MODE_TT + +#Always build unmap_fin.o +extra-y += unmap_fin.o +#Do dependency tracking for unmap.o (it will be always built, but won't get the tracking unless we use this). +targets += unmap.o + +#XXX: partially copied from arch/um/scripts/Makefile.rules +$(obj)/unmap.o: _c_flags = $(call unprofile,$(CFLAGS)) + +quiet_cmd_wrapld = LD $@ +define cmd_wrapld + $(LD) -r -o $(obj)/unmap_tmp.o $< $(shell $(CC) -print-file-name=libc.a); \ + $(OBJCOPY) $(obj)/unmap_tmp.o $@ -G switcheroo +endef + +$(obj)/unmap_fin.o : $(obj)/unmap.o FORCE + $(call if_changed,wrapld) + +endif diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile index 4351e56..095bcdb 100644 --- a/arch/um/sys-i386/Makefile +++ b/arch/um/sys-i386/Makefile @@ -17,3 +17,5 @@ highmem.c-dir = mm module.c-dir = kernel subdir- := util + +include arch/um/scripts/Makefile.unmap diff --git a/arch/um/sys-i386/unmap.c b/arch/um/sys-i386/unmap.c new file mode 100644 index 0000000..1368752 --- /dev/null +++ b/arch/um/sys-i386/unmap.c @@ -0,0 +1,25 @@ +/* + * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include <linux/mman.h> +#include <asm/unistd.h> + +static int errno; + +static inline _syscall2(int,munmap,void *,start,size_t,len) +static inline _syscall6(void *,mmap2,void *,addr,size_t,len,int,prot,int,flags,int,fd,off_t,offset) +int switcheroo(int fd, int prot, void *from, void *to, int size) +{ + if(munmap(to, size) < 0){ + return(-1); + } + if(mmap2(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) != to){ + return(-1); + } + if(munmap(from, size) < 0){ + return(-1); + } + return(0); +} diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile index 608466a..2bc6f68 100644 --- a/arch/um/sys-x86_64/Makefile +++ b/arch/um/sys-x86_64/Makefile @@ -29,3 +29,5 @@ thunk.S-dir = lib module.c-dir = kernel subdir- := util + +include arch/um/scripts/Makefile.unmap diff --git a/arch/um/sys-x86_64/unmap.c b/arch/um/sys-x86_64/unmap.c new file mode 100644 index 0000000..bc7094c --- /dev/null +++ b/arch/um/sys-x86_64/unmap.c @@ -0,0 +1,25 @@ +/* + * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include <linux/mman.h> +#include <asm/unistd.h> + +static int errno; + +static inline _syscall2(int,munmap,void *,start,size_t,len) +static inline _syscall6(void *,mmap,void *,addr,size_t,len,int,prot,int,flags,int,fd,off_t,offset) +int switcheroo(int fd, int prot, void *from, void *to, int size) +{ + if(munmap(to, size) < 0){ + return(-1); + } + if(mmap(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) != to){ + return(-1); + } + if(munmap(from, size) < 0){ + return(-1); + } + return(0); +} |