source: mainline/kernel/arch/amd64/Makefile.inc@ 4928165

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 4928165 was 1a5eca4, checked in by Jakub Jermar <jakub@…>, 9 years ago

amd64: Make TLS settable from uspace

The TLS document[1] mandates that %fs[0] is the thread pointer on amd64.
That is good as it allows userspace-only TLS management for fibrils:
fibril_save/restore() simply manipulate the thread pointer in %fs:0 and
don't need to ask the kernel to modify %fs's base. The kernel treats
%fs:0 as another preserved register and preserves it across context
switches. GCC gets in the way a little bit because it by default assumes
that TLS is accessible from negative %fs offsets (which would
necessitate a kernel-assisted solution). Fortunately, there is a GCC
option to suppress this assumption.

  • Introduce the concept of virtual registers, with VREG_TP (thread pointer) being the first of them
  • Preserve VREG_TP in context_save/restore()
  • Stop using sys_tls_set() in favour of using %fs:0 as the thread pointer
  • Make GCC generate code that always goes through %gs:0 to access TLS
  • Introduce kseg: a per-CPU area accessible from GS_KERNEL that holds the kernel stack, kernel FS base and a scratch space for syscall and int handlers to use

[1] Drepper, U.: ELF Handling For Thread-Local Storage
  • Property mode set to 100644
File size: 3.1 KB
RevLine 
[6bc4dbd]1#
[df4ed85]2# Copyright (c) 2005 Martin Decky
[6bc4dbd]3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions
7# are met:
8#
9# - Redistributions of source code must retain the above copyright
10# notice, this list of conditions and the following disclaimer.
11# - Redistributions in binary form must reproduce the above copyright
12# notice, this list of conditions and the following disclaimer in the
13# documentation and/or other materials provided with the distribution.
14# - The name of the author may not be used to endorse or promote products
15# derived from this software without specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27#
28
29BFD_NAME = elf64-x86-64
30BFD_ARCH = i386:x86-64
[389f41e]31BFD = binary
[6bc4dbd]32
[23cdc921]33FPU_NO_CFLAGS = -mno-sse -mno-sse2
[17af882]34CMN1 = -m64 -mcmodel=kernel -mno-red-zone -fno-unwind-tables -fno-omit-frame-pointer
[44bec47]35GCC_CFLAGS += $(CMN1)
36ICC_CFLAGS += $(CMN1)
[1570759b]37CLANG_CFLAGS += $(CMN1)
[52d30c4]38
[ac47b7c2]39BITS = 64
40ENDIANESS = LE
[6bc4dbd]41
42## Accepted CPUs
43#
44
[1c6b3a2]45ifeq ($(PROCESSOR),opteron)
[44bec47]46 CMN2 := -march=opteron
47 GCC_CFLAGS += $(CMN2)
48 ICC_CFLAGS += $(CMN2)
[04225a7]49endif
50
[6bc4dbd]51ARCH_SOURCES = \
[7004747]52 arch/$(KARCH)/src/fpu_context.c \
[1f5c9c96]53 arch/$(KARCH)/src/boot/multiboot.S \
54 arch/$(KARCH)/src/boot/multiboot2.S \
[7004747]55 arch/$(KARCH)/src/boot/memmap.c \
[304342e]56 arch/$(KARCH)/src/debug/stacktrace.c \
57 arch/$(KARCH)/src/debug/stacktrace_asm.S \
[7004747]58 arch/$(KARCH)/src/pm.c \
[1a5eca4]59 arch/$(KARCH)/src/vreg.c \
60 arch/$(KARCH)/src/kseg.c \
[7004747]61 arch/$(KARCH)/src/context.S \
62 arch/$(KARCH)/src/ddi/ddi.c \
63 arch/$(KARCH)/src/drivers/i8254.c \
64 arch/$(KARCH)/src/drivers/i8259.c \
65 arch/$(KARCH)/src/delay.S \
66 arch/$(KARCH)/src/amd64.c \
67 arch/$(KARCH)/src/bios/bios.c \
68 arch/$(KARCH)/src/interrupt.c \
[55896b6]69 arch/$(KARCH)/src/mm/km.c \
[7004747]70 arch/$(KARCH)/src/mm/as.c \
71 arch/$(KARCH)/src/mm/frame.c \
72 arch/$(KARCH)/src/mm/page.c \
73 arch/$(KARCH)/src/mm/tlb.c \
[da52547]74 arch/$(KARCH)/src/asm.S \
[7004747]75 arch/$(KARCH)/src/cpu/cpu.c \
76 arch/$(KARCH)/src/proc/scheduler.c \
77 arch/$(KARCH)/src/proc/task.c \
78 arch/$(KARCH)/src/proc/thread.c \
79 arch/$(KARCH)/src/userspace.c \
[4a5ba372]80 arch/$(KARCH)/src/syscall.c
[544b4bf]81
[6bc4dbd]82ifeq ($(CONFIG_SMP),y)
83 ARCH_SOURCES += \
[7004747]84 arch/$(KARCH)/src/smp/ap.S \
85 arch/$(KARCH)/src/smp/apic.c \
86 arch/$(KARCH)/src/smp/ipi.c \
87 arch/$(KARCH)/src/smp/mps.c \
[2ee1ccc]88 arch/$(KARCH)/src/smp/smp_call.c \
[7004747]89 arch/$(KARCH)/src/smp/smp.c
[ab08b42]90endif
[4236b18]91
92ARCH_AUTOGENS_AG = \
[0aee9b4]93 arch/$(KARCH)/include/arch/istate_struct.ag \
[1a5eca4]94 arch/$(KARCH)/include/arch/context_struct.ag \
95 arch/$(KARCH)/include/arch/kseg_struct.ag
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