42daba3165
Throw out a lot of code dealing with saving and restoring floating-point
state. In skas mode, where processes run in a restoring floating-point state
on kernel entry and exit is pointless.
This eliminates most of arch/um/os-Linux/sys-{i386,x86_64}/registers.c. Most
of what remained is now arch-indpendent, and can be moved up to
arch/um/os-Linux/registers.c. Both arches need the jmp_buf accessor
get_thread_reg, and i386 needs {save,restore}_fp_regs because it cheats during
sigreturn by getting the fp state using ptrace rather than copying it out of
the process sigcontext.
After this, it turns out that arch/um/include/skas/mode-skas.h is almost
completely unneeded. The declarations in it are variables which either don't
exist or which don't have global scope. The one exception is
kill_off_processes_skas. If that's removed, this header can be deleted.
This uncovered a bug in user.h, which wasn't correctly making sure that a
size_t definition was available to both userspace and kernelspace files.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
29 lines
870 B
Makefile
29 lines
870 B
Makefile
#
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# Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
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# Licensed under the GPL
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#
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obj-y = aio.o elf_aux.o execvp.o file.o helper.o irq.o main.o mem.o process.o \
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registers.o sigio.o signal.o start_up.o time.o trap.o tty.o uaccess.o \
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umid.o tls.o user_syms.o util.o drivers/ sys-$(SUBARCH)/
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obj-$(CONFIG_MODE_SKAS) += skas/
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obj-$(CONFIG_MODE_TT) += tt.o
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user-objs-$(CONFIG_MODE_TT) += tt.o
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obj-$(CONFIG_TTY_LOG) += tty_log.o
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user-objs-$(CONFIG_TTY_LOG) += tty_log.o
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USER_OBJS := $(user-objs-y) aio.o elf_aux.o execvp.o file.o helper.o irq.o \
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main.o mem.o process.o registers.o sigio.o signal.o start_up.o time.o \
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trap.o tty.o tls.o uaccess.o umid.o util.o
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CFLAGS_user_syms.o += -DSUBARCH_$(SUBARCH)
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HAVE_AIO_ABI := $(shell [ -r /usr/include/linux/aio_abi.h ] && \
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echo -DHAVE_AIO_ABI )
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CFLAGS_aio.o += $(HAVE_AIO_ABI)
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include arch/um/scripts/Makefile.rules
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