source: mainline/kernel/arch/ia32/Makefile.inc@ af9dd1e

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since af9dd1e was d6f9fff, checked in by Jakub Jermar <jakub@…>, 9 years ago

ia32: Make TLS settable from uspace

The TLS document[1] mandates that %gs[0] is the thread pointer on ia32.
That is good as it allows userspace-only TLS management for fibrils:
fibril_save/restore() simply manipulate the thread pointer in %gs:0 and
don't need to ask the kernel to modify %gs's base. The kernel treats
%gs: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 %gs 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 %gs:0 as the thread pointer
  • Make GCC generate code that always goes through %gs:0 to access TLS

[1] Drepper, U.: ELF Handling For Thread-Local Storage
  • Property mode set to 100644
File size: 3.3 KB
Line 
1#
2# Copyright (c) 2005 Martin Decky
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 = elf32-i386
30BFD_ARCH = i386
31BFD = binary
32
33BITS = 32
34ENDIANESS = LE
35
36CMN1 = -m32 -fno-omit-frame-pointer
37GCC_CFLAGS += $(CMN1)
38ICC_CFLAGS += $(CMN1)
39CLANG_CFLAGS += $(CMN1)
40
41## Accepted CPUs
42#
43
44ifeq ($(PROCESSOR),i486)
45 CMN2 = -march=i486
46endif
47
48ifeq ($(PROCESSOR),athlon_xp)
49 CMN2 = -march=athlon-xp
50endif
51
52ifeq ($(PROCESSOR),athlon_mp)
53 CMN2 = -march=athlon-mp
54endif
55
56ifeq ($(PROCESSOR),pentium3)
57 CMN2 = -march=pentium3
58endif
59
60ifeq ($(PROCESSOR),pentium4)
61 CMN2 = -march=pentium4
62endif
63
64ifeq ($(PROCESSOR),core)
65 CMN2 = -march=prescott
66endif
67
68FPU_NO_CFLAGS = -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow
69GCC_CFLAGS += $(CMN2)
70ICC_CFLAGS += $(CMN2)
71CLANG_CFLAGS += $(CMN2)
72
73ARCH_SOURCES = \
74 arch/$(KARCH)/src/context.S \
75 arch/$(KARCH)/src/debug/stacktrace.c \
76 arch/$(KARCH)/src/debug/stacktrace_asm.S \
77 arch/$(KARCH)/src/delay.S \
78 arch/$(KARCH)/src/asm.S \
79 arch/$(KARCH)/src/proc/scheduler.c \
80 arch/$(KARCH)/src/proc/task.c \
81 arch/$(KARCH)/src/proc/thread.c \
82 arch/$(KARCH)/src/bios/bios.c \
83 arch/$(KARCH)/src/smp/ap.S \
84 arch/$(KARCH)/src/smp/apic.c \
85 arch/$(KARCH)/src/smp/mps.c \
86 arch/$(KARCH)/src/smp/smp.c \
87 arch/$(KARCH)/src/smp/smp_call.c \
88 arch/$(KARCH)/src/atomic.S \
89 arch/$(KARCH)/src/smp/ipi.c \
90 arch/$(KARCH)/src/ia32.c \
91 arch/$(KARCH)/src/vreg.c \
92 arch/$(KARCH)/src/interrupt.c \
93 arch/$(KARCH)/src/pm.c \
94 arch/$(KARCH)/src/userspace.c \
95 arch/$(KARCH)/src/cpu/cpu.c \
96 arch/$(KARCH)/src/mm/km.c \
97 arch/$(KARCH)/src/mm/as.c \
98 arch/$(KARCH)/src/mm/frame.c \
99 arch/$(KARCH)/src/mm/page.c \
100 arch/$(KARCH)/src/mm/tlb.c \
101 arch/$(KARCH)/src/ddi/ddi.c \
102 arch/$(KARCH)/src/drivers/i8254.c \
103 arch/$(KARCH)/src/drivers/i8259.c \
104 arch/$(KARCH)/src/boot/multiboot.S \
105 arch/$(KARCH)/src/boot/multiboot2.S \
106 arch/$(KARCH)/src/boot/memmap.c \
107 arch/$(KARCH)/src/fpu_context.c \
108 arch/$(KARCH)/src/syscall.c
109
110ARCH_AUTOGENS_AG = \
111 arch/$(KARCH)/include/arch/istate_struct.ag \
112 arch/$(KARCH)/include/arch/context_struct.ag
113
Note: See TracBrowser for help on using the repository browser.