2005-04-17 06:20:36 +08:00
|
|
|
/*
|
2007-11-20 17:08:06 +08:00
|
|
|
* arch/sh/kernel/process_64.c
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
2007-11-20 17:08:06 +08:00
|
|
|
* This file handles the architecture-dependent parts of process handling..
|
2005-04-17 06:20:36 +08:00
|
|
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*
|
|
|
|
* Copyright (C) 2000, 2001 Paolo Alberelli
|
2007-11-20 17:08:06 +08:00
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* Copyright (C) 2003 - 2007 Paul Mundt
|
2005-04-17 06:20:36 +08:00
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|
* Copyright (C) 2003, 2004 Richard Curnow
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|
|
|
*
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|
* Started from SH3/4 version:
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|
|
|
* Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima
|
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*
|
|
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|
* In turn started from i386 version:
|
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|
* Copyright (C) 1995 Linus Torvalds
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|
*
|
2007-11-20 17:08:06 +08:00
|
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
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|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
|
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* for more details.
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
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#include <linux/mm.h>
|
2007-07-31 12:03:02 +08:00
|
|
|
#include <linux/fs.h>
|
2005-04-17 06:20:36 +08:00
|
|
|
#include <linux/ptrace.h>
|
|
|
|
#include <linux/reboot.h>
|
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
|
|
|
#include <linux/slab.h>
|
2005-04-17 06:20:36 +08:00
|
|
|
#include <linux/init.h>
|
2006-10-02 17:18:41 +08:00
|
|
|
#include <linux/module.h>
|
2007-11-20 14:38:50 +08:00
|
|
|
#include <linux/io.h>
|
2017-02-09 01:51:35 +08:00
|
|
|
#include <linux/sched/debug.h>
|
2017-02-09 01:51:36 +08:00
|
|
|
#include <linux/sched/task.h>
|
2008-09-04 17:53:58 +08:00
|
|
|
#include <asm/syscalls.h>
|
2016-12-25 03:46:01 +08:00
|
|
|
#include <linux/uaccess.h>
|
2005-04-17 06:20:36 +08:00
|
|
|
#include <asm/pgtable.h>
|
2007-11-21 16:07:46 +08:00
|
|
|
#include <asm/mmu_context.h>
|
2008-04-14 02:15:38 +08:00
|
|
|
#include <asm/fpu.h>
|
2012-03-29 01:30:03 +08:00
|
|
|
#include <asm/switch_to.h>
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
struct task_struct *last_task_used_math = NULL;
|
2012-05-24 14:07:47 +08:00
|
|
|
struct pt_regs fake_swapper_regs = { 0, };
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2010-01-20 15:42:52 +08:00
|
|
|
void show_regs(struct pt_regs *regs)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
unsigned long long ah, al, bh, bl, ch, cl;
|
|
|
|
|
|
|
|
printk("\n");
|
dump_stack: unify debug information printed by show_regs()
show_regs() is inherently arch-dependent but it does make sense to print
generic debug information and some archs already do albeit in slightly
different forms. This patch introduces a generic function to print debug
information from show_regs() so that different archs print out the same
information and it's much easier to modify what's printed.
show_regs_print_info() prints out the same debug info as dump_stack()
does plus task and thread_info pointers.
* Archs which didn't print debug info now do.
alpha, arc, blackfin, c6x, cris, frv, h8300, hexagon, ia64, m32r,
metag, microblaze, mn10300, openrisc, parisc, score, sh64, sparc,
um, xtensa
* Already prints debug info. Replaced with show_regs_print_info().
The printed information is superset of what used to be there.
arm, arm64, avr32, mips, powerpc, sh32, tile, unicore32, x86
* s390 is special in that it used to print arch-specific information
along with generic debug info. Heiko and Martin think that the
arch-specific extra isn't worth keeping s390 specfic implementation.
Converted to use the generic version.
Note that now all archs print the debug info before actual register
dumps.
An example BUG() dump follows.
kernel BUG at /work/os/work/kernel/workqueue.c:4841!
invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #7
Hardware name: empty empty/S3992, BIOS 080011 10/26/2007
task: ffff88007c85e040 ti: ffff88007c860000 task.ti: ffff88007c860000
RIP: 0010:[<ffffffff8234a07e>] [<ffffffff8234a07e>] init_workqueues+0x4/0x6
RSP: 0000:ffff88007c861ec8 EFLAGS: 00010246
RAX: ffff88007c861fd8 RBX: ffffffff824466a8 RCX: 0000000000000001
RDX: 0000000000000046 RSI: 0000000000000001 RDI: ffffffff8234a07a
RBP: ffff88007c861ec8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8234a07a
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88007dc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88015f7ff000 CR3: 00000000021f1000 CR4: 00000000000007f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Stack:
ffff88007c861ef8 ffffffff81000312 ffffffff824466a8 ffff88007c85e650
0000000000000003 0000000000000000 ffff88007c861f38 ffffffff82335e5d
ffff88007c862080 ffffffff8223d8c0 ffff88007c862080 ffffffff81c47760
Call Trace:
[<ffffffff81000312>] do_one_initcall+0x122/0x170
[<ffffffff82335e5d>] kernel_init_freeable+0x9b/0x1c8
[<ffffffff81c47760>] ? rest_init+0x140/0x140
[<ffffffff81c4776e>] kernel_init+0xe/0xf0
[<ffffffff81c6be9c>] ret_from_fork+0x7c/0xb0
[<ffffffff81c47760>] ? rest_init+0x140/0x140
...
v2: Typo fix in x86-32.
v3: CPU number dropped from show_regs_print_info() as
dump_stack_print_info() has been updated to print it. s390
specific implementation dropped as requested by s390 maintainers.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Chris Metcalf <cmetcalf@tilera.com> [tile bits]
Acked-by: Richard Kuo <rkuo@codeaurora.org> [hexagon bits]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-01 06:27:17 +08:00
|
|
|
show_regs_print_info(KERN_DEFAULT);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
ah = (regs->pc) >> 32;
|
|
|
|
al = (regs->pc) & 0xffffffff;
|
|
|
|
bh = (regs->regs[18]) >> 32;
|
|
|
|
bl = (regs->regs[18]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[15]) >> 32;
|
|
|
|
cl = (regs->regs[15]) & 0xffffffff;
|
|
|
|
printk("PC : %08Lx%08Lx LINK: %08Lx%08Lx SP : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->sr) >> 32;
|
|
|
|
al = (regs->sr) & 0xffffffff;
|
|
|
|
asm volatile ("getcon " __TEA ", %0" : "=r" (bh));
|
|
|
|
asm volatile ("getcon " __TEA ", %0" : "=r" (bl));
|
|
|
|
bh = (bh) >> 32;
|
|
|
|
bl = (bl) & 0xffffffff;
|
|
|
|
asm volatile ("getcon " __KCR0 ", %0" : "=r" (ch));
|
|
|
|
asm volatile ("getcon " __KCR0 ", %0" : "=r" (cl));
|
|
|
|
ch = (ch) >> 32;
|
|
|
|
cl = (cl) & 0xffffffff;
|
|
|
|
printk("SR : %08Lx%08Lx TEA : %08Lx%08Lx KCR0: %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[0]) >> 32;
|
|
|
|
al = (regs->regs[0]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[1]) >> 32;
|
|
|
|
bl = (regs->regs[1]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[2]) >> 32;
|
|
|
|
cl = (regs->regs[2]) & 0xffffffff;
|
|
|
|
printk("R0 : %08Lx%08Lx R1 : %08Lx%08Lx R2 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[3]) >> 32;
|
|
|
|
al = (regs->regs[3]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[4]) >> 32;
|
|
|
|
bl = (regs->regs[4]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[5]) >> 32;
|
|
|
|
cl = (regs->regs[5]) & 0xffffffff;
|
|
|
|
printk("R3 : %08Lx%08Lx R4 : %08Lx%08Lx R5 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[6]) >> 32;
|
|
|
|
al = (regs->regs[6]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[7]) >> 32;
|
|
|
|
bl = (regs->regs[7]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[8]) >> 32;
|
|
|
|
cl = (regs->regs[8]) & 0xffffffff;
|
|
|
|
printk("R6 : %08Lx%08Lx R7 : %08Lx%08Lx R8 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[9]) >> 32;
|
|
|
|
al = (regs->regs[9]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[10]) >> 32;
|
|
|
|
bl = (regs->regs[10]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[11]) >> 32;
|
|
|
|
cl = (regs->regs[11]) & 0xffffffff;
|
|
|
|
printk("R9 : %08Lx%08Lx R10 : %08Lx%08Lx R11 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[12]) >> 32;
|
|
|
|
al = (regs->regs[12]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[13]) >> 32;
|
|
|
|
bl = (regs->regs[13]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[14]) >> 32;
|
|
|
|
cl = (regs->regs[14]) & 0xffffffff;
|
|
|
|
printk("R12 : %08Lx%08Lx R13 : %08Lx%08Lx R14 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[16]) >> 32;
|
|
|
|
al = (regs->regs[16]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[17]) >> 32;
|
|
|
|
bl = (regs->regs[17]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[19]) >> 32;
|
|
|
|
cl = (regs->regs[19]) & 0xffffffff;
|
|
|
|
printk("R16 : %08Lx%08Lx R17 : %08Lx%08Lx R19 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[20]) >> 32;
|
|
|
|
al = (regs->regs[20]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[21]) >> 32;
|
|
|
|
bl = (regs->regs[21]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[22]) >> 32;
|
|
|
|
cl = (regs->regs[22]) & 0xffffffff;
|
|
|
|
printk("R20 : %08Lx%08Lx R21 : %08Lx%08Lx R22 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[23]) >> 32;
|
|
|
|
al = (regs->regs[23]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[24]) >> 32;
|
|
|
|
bl = (regs->regs[24]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[25]) >> 32;
|
|
|
|
cl = (regs->regs[25]) & 0xffffffff;
|
|
|
|
printk("R23 : %08Lx%08Lx R24 : %08Lx%08Lx R25 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[26]) >> 32;
|
|
|
|
al = (regs->regs[26]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[27]) >> 32;
|
|
|
|
bl = (regs->regs[27]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[28]) >> 32;
|
|
|
|
cl = (regs->regs[28]) & 0xffffffff;
|
|
|
|
printk("R26 : %08Lx%08Lx R27 : %08Lx%08Lx R28 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[29]) >> 32;
|
|
|
|
al = (regs->regs[29]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[30]) >> 32;
|
|
|
|
bl = (regs->regs[30]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[31]) >> 32;
|
|
|
|
cl = (regs->regs[31]) & 0xffffffff;
|
|
|
|
printk("R29 : %08Lx%08Lx R30 : %08Lx%08Lx R31 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[32]) >> 32;
|
|
|
|
al = (regs->regs[32]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[33]) >> 32;
|
|
|
|
bl = (regs->regs[33]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[34]) >> 32;
|
|
|
|
cl = (regs->regs[34]) & 0xffffffff;
|
|
|
|
printk("R32 : %08Lx%08Lx R33 : %08Lx%08Lx R34 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[35]) >> 32;
|
|
|
|
al = (regs->regs[35]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[36]) >> 32;
|
|
|
|
bl = (regs->regs[36]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[37]) >> 32;
|
|
|
|
cl = (regs->regs[37]) & 0xffffffff;
|
|
|
|
printk("R35 : %08Lx%08Lx R36 : %08Lx%08Lx R37 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[38]) >> 32;
|
|
|
|
al = (regs->regs[38]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[39]) >> 32;
|
|
|
|
bl = (regs->regs[39]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[40]) >> 32;
|
|
|
|
cl = (regs->regs[40]) & 0xffffffff;
|
|
|
|
printk("R38 : %08Lx%08Lx R39 : %08Lx%08Lx R40 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[41]) >> 32;
|
|
|
|
al = (regs->regs[41]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[42]) >> 32;
|
|
|
|
bl = (regs->regs[42]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[43]) >> 32;
|
|
|
|
cl = (regs->regs[43]) & 0xffffffff;
|
|
|
|
printk("R41 : %08Lx%08Lx R42 : %08Lx%08Lx R43 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[44]) >> 32;
|
|
|
|
al = (regs->regs[44]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[45]) >> 32;
|
|
|
|
bl = (regs->regs[45]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[46]) >> 32;
|
|
|
|
cl = (regs->regs[46]) & 0xffffffff;
|
|
|
|
printk("R44 : %08Lx%08Lx R45 : %08Lx%08Lx R46 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[47]) >> 32;
|
|
|
|
al = (regs->regs[47]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[48]) >> 32;
|
|
|
|
bl = (regs->regs[48]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[49]) >> 32;
|
|
|
|
cl = (regs->regs[49]) & 0xffffffff;
|
|
|
|
printk("R47 : %08Lx%08Lx R48 : %08Lx%08Lx R49 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[50]) >> 32;
|
|
|
|
al = (regs->regs[50]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[51]) >> 32;
|
|
|
|
bl = (regs->regs[51]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[52]) >> 32;
|
|
|
|
cl = (regs->regs[52]) & 0xffffffff;
|
|
|
|
printk("R50 : %08Lx%08Lx R51 : %08Lx%08Lx R52 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[53]) >> 32;
|
|
|
|
al = (regs->regs[53]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[54]) >> 32;
|
|
|
|
bl = (regs->regs[54]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[55]) >> 32;
|
|
|
|
cl = (regs->regs[55]) & 0xffffffff;
|
|
|
|
printk("R53 : %08Lx%08Lx R54 : %08Lx%08Lx R55 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[56]) >> 32;
|
|
|
|
al = (regs->regs[56]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[57]) >> 32;
|
|
|
|
bl = (regs->regs[57]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[58]) >> 32;
|
|
|
|
cl = (regs->regs[58]) & 0xffffffff;
|
|
|
|
printk("R56 : %08Lx%08Lx R57 : %08Lx%08Lx R58 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[59]) >> 32;
|
|
|
|
al = (regs->regs[59]) & 0xffffffff;
|
|
|
|
bh = (regs->regs[60]) >> 32;
|
|
|
|
bl = (regs->regs[60]) & 0xffffffff;
|
|
|
|
ch = (regs->regs[61]) >> 32;
|
|
|
|
cl = (regs->regs[61]) & 0xffffffff;
|
|
|
|
printk("R59 : %08Lx%08Lx R60 : %08Lx%08Lx R61 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->regs[62]) >> 32;
|
|
|
|
al = (regs->regs[62]) & 0xffffffff;
|
|
|
|
bh = (regs->tregs[0]) >> 32;
|
|
|
|
bl = (regs->tregs[0]) & 0xffffffff;
|
|
|
|
ch = (regs->tregs[1]) >> 32;
|
|
|
|
cl = (regs->tregs[1]) & 0xffffffff;
|
|
|
|
printk("R62 : %08Lx%08Lx T0 : %08Lx%08Lx T1 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->tregs[2]) >> 32;
|
|
|
|
al = (regs->tregs[2]) & 0xffffffff;
|
|
|
|
bh = (regs->tregs[3]) >> 32;
|
|
|
|
bl = (regs->tregs[3]) & 0xffffffff;
|
|
|
|
ch = (regs->tregs[4]) >> 32;
|
|
|
|
cl = (regs->tregs[4]) & 0xffffffff;
|
|
|
|
printk("T2 : %08Lx%08Lx T3 : %08Lx%08Lx T4 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
ah = (regs->tregs[5]) >> 32;
|
|
|
|
al = (regs->tregs[5]) & 0xffffffff;
|
|
|
|
bh = (regs->tregs[6]) >> 32;
|
|
|
|
bl = (regs->tregs[6]) & 0xffffffff;
|
|
|
|
ch = (regs->tregs[7]) >> 32;
|
|
|
|
cl = (regs->tregs[7]) & 0xffffffff;
|
|
|
|
printk("T5 : %08Lx%08Lx T6 : %08Lx%08Lx T7 : %08Lx%08Lx\n",
|
|
|
|
ah, al, bh, bl, ch, cl);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If we're in kernel mode, dump the stack too..
|
|
|
|
*/
|
|
|
|
if (!user_mode(regs)) {
|
|
|
|
void show_stack(struct task_struct *tsk, unsigned long *sp);
|
|
|
|
unsigned long sp = regs->regs[15] & 0xffffffff;
|
|
|
|
struct task_struct *tsk = get_current();
|
|
|
|
|
|
|
|
tsk->thread.kregs = regs;
|
|
|
|
|
|
|
|
show_stack(tsk, (unsigned long *)sp);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Free current thread data structures etc..
|
|
|
|
*/
|
2016-05-21 08:00:20 +08:00
|
|
|
void exit_thread(struct task_struct *tsk)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2007-11-28 19:19:38 +08:00
|
|
|
/*
|
|
|
|
* See arch/sparc/kernel/process.c for the precedent for doing
|
|
|
|
* this -- RPC.
|
|
|
|
*
|
|
|
|
* The SH-5 FPU save/restore approach relies on
|
|
|
|
* last_task_used_math pointing to a live task_struct. When
|
|
|
|
* another task tries to use the FPU for the 1st time, the FPUDIS
|
|
|
|
* trap handling (see arch/sh/kernel/cpu/sh5/fpu.c) will save the
|
|
|
|
* existing FPU state to the FP regs field within
|
|
|
|
* last_task_used_math before re-loading the new task's FPU state
|
|
|
|
* (or initialising it if the FPU has been used before). So if
|
|
|
|
* last_task_used_math is stale, and its page has already been
|
|
|
|
* re-allocated for another use, the consequences are rather
|
|
|
|
* grim. Unless we null it here, there is no other path through
|
|
|
|
* which it would get safely nulled.
|
|
|
|
*/
|
2005-04-17 06:20:36 +08:00
|
|
|
#ifdef CONFIG_SH_FPU
|
2016-05-21 08:00:20 +08:00
|
|
|
if (last_task_used_math == tsk)
|
2005-04-17 06:20:36 +08:00
|
|
|
last_task_used_math = NULL;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
void flush_thread(void)
|
|
|
|
{
|
|
|
|
|
Split 'flush_old_exec' into two functions
'flush_old_exec()' is the point of no return when doing an execve(), and
it is pretty badly misnamed. It doesn't just flush the old executable
environment, it also starts up the new one.
Which is very inconvenient for things like setting up the new
personality, because we want the new personality to affect the starting
of the new environment, but at the same time we do _not_ want the new
personality to take effect if flushing the old one fails.
As a result, the x86-64 '32-bit' personality is actually done using this
insane "I'm going to change the ABI, but I haven't done it yet" bit
(TIF_ABI_PENDING), with SET_PERSONALITY() not actually setting the
personality, but just the "pending" bit, so that "flush_thread()" can do
the actual personality magic.
This patch in no way changes any of that insanity, but it does split the
'flush_old_exec()' function up into a preparatory part that can fail
(still called flush_old_exec()), and a new part that will actually set
up the new exec environment (setup_new_exec()). All callers are changed
to trivially comply with the new world order.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-01-29 14:14:42 +08:00
|
|
|
/* Called by fs/exec.c (setup_new_exec) to remove traces of a
|
2005-04-17 06:20:36 +08:00
|
|
|
* previously running executable. */
|
|
|
|
#ifdef CONFIG_SH_FPU
|
|
|
|
if (last_task_used_math == current) {
|
|
|
|
last_task_used_math = NULL;
|
|
|
|
}
|
|
|
|
/* Force FPU state to be reinitialised after exec */
|
|
|
|
clear_used_math();
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* if we are a kernel thread, about to change to user thread,
|
|
|
|
* update kreg
|
|
|
|
*/
|
|
|
|
if(current->thread.kregs==&fake_swapper_regs) {
|
|
|
|
current->thread.kregs =
|
|
|
|
((struct pt_regs *)(THREAD_SIZE + (unsigned long) current) - 1);
|
|
|
|
current->thread.uregs = current->thread.kregs;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void release_thread(struct task_struct *dead_task)
|
|
|
|
{
|
|
|
|
/* do nothing */
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Fill in the fpu structure for a core dump.. */
|
|
|
|
int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
|
|
|
|
{
|
|
|
|
#ifdef CONFIG_SH_FPU
|
|
|
|
int fpvalid;
|
|
|
|
struct task_struct *tsk = current;
|
|
|
|
|
|
|
|
fpvalid = !!tsk_used_math(tsk);
|
|
|
|
if (fpvalid) {
|
|
|
|
if (current == last_task_used_math) {
|
2007-11-19 18:13:38 +08:00
|
|
|
enable_fpu();
|
2009-12-15 04:12:04 +08:00
|
|
|
save_fpu(tsk);
|
2007-11-19 18:13:38 +08:00
|
|
|
disable_fpu();
|
2005-04-17 06:20:36 +08:00
|
|
|
last_task_used_math = 0;
|
|
|
|
regs->sr |= SR_FD;
|
|
|
|
}
|
|
|
|
|
2010-01-19 14:40:03 +08:00
|
|
|
memcpy(fpu, &tsk->thread.xstate->hardfpu, sizeof(*fpu));
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
return fpvalid;
|
|
|
|
#else
|
|
|
|
return 0; /* Task didn't use the fpu at all. */
|
|
|
|
#endif
|
|
|
|
}
|
2009-10-27 10:51:19 +08:00
|
|
|
EXPORT_SYMBOL(dump_fpu);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
asmlinkage void ret_from_fork(void);
|
2012-10-14 13:41:42 +08:00
|
|
|
asmlinkage void ret_from_kernel_thread(void);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-04-03 07:56:59 +08:00
|
|
|
int copy_thread(unsigned long clone_flags, unsigned long usp,
|
2012-10-23 10:51:14 +08:00
|
|
|
unsigned long arg, struct task_struct *p)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2013-11-13 07:06:48 +08:00
|
|
|
struct pt_regs *childregs;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
#ifdef CONFIG_SH_FPU
|
2012-10-14 13:41:42 +08:00
|
|
|
/* can't happen for a kernel thread */
|
|
|
|
if (last_task_used_math == current) {
|
2007-11-19 18:13:38 +08:00
|
|
|
enable_fpu();
|
2009-12-15 04:12:04 +08:00
|
|
|
save_fpu(current);
|
2007-11-19 18:13:38 +08:00
|
|
|
disable_fpu();
|
2005-04-17 06:20:36 +08:00
|
|
|
last_task_used_math = NULL;
|
2012-10-27 12:13:51 +08:00
|
|
|
current_pt_regs()->sr |= SR_FD;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
/* Copy from sh version */
|
2006-01-12 17:06:01 +08:00
|
|
|
childregs = (struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1;
|
2012-10-14 13:41:42 +08:00
|
|
|
p->thread.sp = (unsigned long) childregs;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2012-10-14 13:41:42 +08:00
|
|
|
if (unlikely(p->flags & PF_KTHREAD)) {
|
|
|
|
memset(childregs, 0, sizeof(struct pt_regs));
|
|
|
|
childregs->regs[2] = (unsigned long)arg;
|
2013-11-13 07:06:46 +08:00
|
|
|
childregs->regs[3] = (unsigned long)usp;
|
2012-10-14 13:41:42 +08:00
|
|
|
childregs->sr = (1 << 30); /* not user_mode */
|
|
|
|
childregs->sr |= SR_FD; /* Invalidate FPU flag */
|
|
|
|
p->thread.pc = (unsigned long) ret_from_kernel_thread;
|
|
|
|
return 0;
|
|
|
|
}
|
2012-10-27 12:13:51 +08:00
|
|
|
*childregs = *current_pt_regs();
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-08-04 16:14:39 +08:00
|
|
|
/*
|
|
|
|
* Sign extend the edited stack.
|
|
|
|
* Note that thread.pc and thread.pc will stay
|
|
|
|
* 32-bit wide and context switch must take care
|
|
|
|
* of NEFF sign extension.
|
|
|
|
*/
|
2012-10-27 12:13:51 +08:00
|
|
|
if (usp)
|
|
|
|
childregs->regs[15] = neff_sign_extend(usp);
|
2012-10-14 13:41:42 +08:00
|
|
|
p->thread.uregs = childregs;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
childregs->regs[9] = 0; /* Set return value for child */
|
|
|
|
childregs->sr |= SR_FD; /* Invalidate FPU flag */
|
|
|
|
|
|
|
|
p->thread.pc = (unsigned long) ret_from_fork;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-02-12 16:02:08 +08:00
|
|
|
#ifdef CONFIG_FRAME_POINTER
|
2005-04-17 06:20:36 +08:00
|
|
|
static int in_sh64_switch_to(unsigned long pc)
|
|
|
|
{
|
|
|
|
extern char __sh64_switch_to_end;
|
|
|
|
/* For a sleeping task, the PC is somewhere in the middle of the function,
|
|
|
|
so we don't have to worry about masking the LSB off */
|
|
|
|
return (pc >= (unsigned long) sh64_switch_to) &&
|
|
|
|
(pc < (unsigned long) &__sh64_switch_to_end);
|
|
|
|
}
|
2008-02-12 16:02:08 +08:00
|
|
|
#endif
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
unsigned long get_wchan(struct task_struct *p)
|
|
|
|
{
|
|
|
|
unsigned long pc;
|
|
|
|
|
|
|
|
if (!p || p == current || p->state == TASK_RUNNING)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* The same comment as on the Alpha applies here, too ...
|
|
|
|
*/
|
|
|
|
pc = thread_saved_pc(p);
|
|
|
|
|
|
|
|
#ifdef CONFIG_FRAME_POINTER
|
|
|
|
if (in_sh64_switch_to(pc)) {
|
2008-02-12 16:02:08 +08:00
|
|
|
unsigned long schedule_fp;
|
|
|
|
unsigned long sh64_switch_to_fp;
|
|
|
|
unsigned long schedule_caller_pc;
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
sh64_switch_to_fp = (long) p->thread.sp;
|
|
|
|
/* r14 is saved at offset 4 in the sh64_switch_to frame */
|
|
|
|
schedule_fp = *(unsigned long *) (long)(sh64_switch_to_fp + 4);
|
|
|
|
|
|
|
|
/* and the caller of 'schedule' is (currently!) saved at offset 24
|
|
|
|
in the frame of schedule (from disasm) */
|
|
|
|
schedule_caller_pc = *(unsigned long *) (long)(schedule_fp + 24);
|
|
|
|
return schedule_caller_pc;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
return pc;
|
|
|
|
}
|