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f7e4217b00
This finally renames the thread_info field in task structure to stack, so that the assumptions about this field are gone and archs have more freedom about placing the thread_info structure. Nonbroken archs which have a proper thread pointer can do the access to both current thread and task structure via a single pointer. It'll allow for a few more cleanups of the fork code, from which e.g. ia64 could benefit. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> [akpm@linux-foundation.org: build fix] Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ian Molton <spyro@f2s.com> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Greg Ungerer <gerg@uclinux.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Richard Curnow <rc@rc0.org.uk> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: Andi Kleen <ak@muc.de> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
/*
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* This program is used to generate definitions needed by
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* assembly language modules.
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*
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* We use the technique used in the OSF Mach kernel code:
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* generate asm statements containing #defines,
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* compile this file to assembler, and then extract the
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* #defines from the assembly-language output.
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*
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* On sparc, thread_info data is static and TI_XXX offsets are computed by hand.
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*/
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#include <linux/sched.h>
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// #include <linux/mm.h>
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#define DEFINE(sym, val) \
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asm volatile("\n->" #sym " %0 " #val : : "i" (val))
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#define BLANK() asm volatile("\n->" : : )
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int foo(void)
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{
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DEFINE(AOFF_task_thread, offsetof(struct task_struct, thread));
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BLANK();
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/* XXX This is the stuff for sclow.S, kill it. */
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DEFINE(AOFF_task_pid, offsetof(struct task_struct, pid));
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DEFINE(AOFF_task_uid, offsetof(struct task_struct, uid));
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DEFINE(AOFF_task_gid, offsetof(struct task_struct, gid));
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DEFINE(AOFF_task_euid, offsetof(struct task_struct, euid));
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DEFINE(AOFF_task_egid, offsetof(struct task_struct, egid));
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/* DEFINE(THREAD_INFO, offsetof(struct task_struct, stack)); */
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DEFINE(ASIZ_task_uid, sizeof(current->uid));
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DEFINE(ASIZ_task_gid, sizeof(current->gid));
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DEFINE(ASIZ_task_euid, sizeof(current->euid));
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DEFINE(ASIZ_task_egid, sizeof(current->egid));
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BLANK();
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DEFINE(AOFF_thread_fork_kpsr,
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offsetof(struct thread_struct, fork_kpsr));
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BLANK();
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DEFINE(AOFF_mm_context, offsetof(struct mm_struct, context));
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/* DEFINE(NUM_USER_SEGMENTS, TASK_SIZE>>28); */
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return 0;
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}
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