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alistair23-linux/arch/alpha/kernel/traps.c

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License cleanup: add SPDX GPL-2.0 license identifier to files with no license Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 08:07:57 -06:00
// SPDX-License-Identifier: GPL-2.0
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
/*
* arch/alpha/kernel/traps.c
*
* (C) Copyright 1994 Linus Torvalds
*/
/*
* This file initializes the trap entry points
*/
arch/alpha/kernel/traps.c: use time_* macros The functions time_before, time_before_eq, time_after, and time_after_eq are more robust for comparing jiffies against other values. So implement usage of the time_after() macro, defined in linux/jiffies.h, which deals with wrapping correctly [akpm@linux-foundation.org: fix warning] Signed-off-by: S.Caglar Onur <caglar@pardus.org.tr> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-28 03:13:47 -06:00
#include <linux/jiffies.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#include <linux/mm.h>
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> We are going to split <linux/sched/signal.h> out of <linux/sched.h>, which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder <linux/sched/signal.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-02-08 10:51:30 -07:00
#include <linux/sched/signal.h>
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h> We are going to split <linux/sched/debug.h> out of <linux/sched.h>, which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder <linux/sched/debug.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-02-08 10:51:35 -07:00
#include <linux/sched/debug.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#include <linux/tty.h>
#include <linux/delay.h>
alpha: migrate exception table users off module.h and onto extable.h These files were only including module.h for exception table related functions. We've now separated that content out into its own file "extable.h" so now move over to that and avoid all the extra header content in module.h that we don't really need to compile these files. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: linux-alpha@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2016-07-23 12:01:45 -06:00
#include <linux/extable.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#include <linux/kallsyms.h>
alpha: use __ratelimit Replace open-coded rate limiting logic with __ratelimit(). Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: Matt Turner <mattst88@gmail.com>
2010-03-01 11:25:49 -07:00
#include <linux/ratelimit.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#include <asm/gentrap.h>
Replace <asm/uaccess.h> with <linux/uaccess.h> globally This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-24 12:46:01 -07:00
#include <linux/uaccess.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#include <asm/unaligned.h>
#include <asm/sysinfo.h>
#include <asm/hwrpb.h>
#include <asm/mmu_context.h>
Disintegrate asm/system.h for Alpha Disintegrate asm/system.h for Alpha. Signed-off-by: David Howells <dhowells@redhat.com> cc: linux-alpha@vger.kernel.org
2012-03-28 11:11:12 -06:00
#include <asm/special_insns.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#include "proto.h"
/* Work-around for some SRMs which mishandle opDEC faults. */
static int opDEC_fix;
alpha: delete __cpuinit usage from all users The __cpuinit type of throwaway sections might have made sense some time ago when RAM was more constrained, but now the savings do not offset the cost and complications. For example, the fix in commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time") is a good example of the nasty type of bugs that can be created with improper use of the various __init prefixes. After a discussion on LKML[1] it was decided that cpuinit should go the way of devinit and be phased out. Once all the users are gone, we can then finally remove the macros themselves from linux/init.h. This removes all the alpha uses of the __cpuinit macros. [1] https://lkml.org/lkml/2013/5/20/589 Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2013-06-17 13:43:14 -06:00
static void
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
opDEC_check(void)
{
__asm__ __volatile__ (
/* Load the address of... */
" br $16, 1f\n"
/* A stub instruction fault handler. Just add 4 to the
pc and continue. */
" ldq $16, 8($sp)\n"
" addq $16, 4, $16\n"
" stq $16, 8($sp)\n"
" call_pal %[rti]\n"
/* Install the instruction fault handler. */
"1: lda $17, 3\n"
" call_pal %[wrent]\n"
/* With that in place, the fault from the round-to-minf fp
insn will arrive either at the "lda 4" insn (bad) or one
past that (good). This places the correct fixup in %0. */
" lda %[fix], 0\n"
" cvttq/svm $f31,$f31\n"
" lda %[fix], 4"
: [fix] "=r" (opDEC_fix)
: [rti] "n" (PAL_rti), [wrent] "n" (PAL_wrent)
: "$0", "$1", "$16", "$17", "$22", "$23", "$24", "$25");
if (opDEC_fix)
printk("opDEC fixup enabled.\n");
}
void
dik_show_regs(struct pt_regs *regs, unsigned long *r9_15)
{
printk("pc = [<%016lx>] ra = [<%016lx>] ps = %04lx %s\n",
regs->pc, regs->r26, regs->ps, print_tainted());
alpha: Convert print_symbol to %pSR Use the new vsprintf extension to avoid any possible message interleaving. Reviewed-by: Matt Turner <mattst88@gmail.com> Signed-off-by: Matt Turner <mattst88@gmail.com> Signed-off-by: Joe Perches <joe@perches.com>
2012-12-12 11:18:51 -07:00
printk("pc is at %pSR\n", (void *)regs->pc);
printk("ra is at %pSR\n", (void *)regs->r26);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
printk("v0 = %016lx t0 = %016lx t1 = %016lx\n",
regs->r0, regs->r1, regs->r2);
printk("t2 = %016lx t3 = %016lx t4 = %016lx\n",
regs->r3, regs->r4, regs->r5);
printk("t5 = %016lx t6 = %016lx t7 = %016lx\n",
regs->r6, regs->r7, regs->r8);
if (r9_15) {
printk("s0 = %016lx s1 = %016lx s2 = %016lx\n",
r9_15[9], r9_15[10], r9_15[11]);
printk("s3 = %016lx s4 = %016lx s5 = %016lx\n",
r9_15[12], r9_15[13], r9_15[14]);
printk("s6 = %016lx\n", r9_15[15]);
}
printk("a0 = %016lx a1 = %016lx a2 = %016lx\n",
regs->r16, regs->r17, regs->r18);
printk("a3 = %016lx a4 = %016lx a5 = %016lx\n",
regs->r19, regs->r20, regs->r21);
printk("t8 = %016lx t9 = %016lx t10= %016lx\n",
regs->r22, regs->r23, regs->r24);
printk("t11= %016lx pv = %016lx at = %016lx\n",
regs->r25, regs->r27, regs->r28);
printk("gp = %016lx sp = %p\n", regs->gp, regs+1);
#if 0
__halt();
#endif
}
#if 0
static char * ireg_name[] = {"v0", "t0", "t1", "t2", "t3", "t4", "t5", "t6",
"t7", "s0", "s1", "s2", "s3", "s4", "s5", "s6",
"a0", "a1", "a2", "a3", "a4", "a5", "t8", "t9",
"t10", "t11", "ra", "pv", "at", "gp", "sp", "zero"};
#endif
static void
dik_show_code(unsigned int *pc)
{
long i;
printk("Code:");
for (i = -6; i < 2; i++) {
unsigned int insn;
if (__get_user(insn, (unsigned int __user *)pc + i))
break;
printk("%c%08x%c", i ? ' ' : '<', insn, i ? ' ' : '>');
}
printk("\n");
}
static void
dik_show_trace(unsigned long *sp)
{
long i = 0;
printk("Trace:\n");
while (0x1ff8 & (unsigned long) sp) {
extern char _stext[], _etext[];
unsigned long tmp = *sp;
sp++;
if (tmp < (unsigned long) &_stext)
continue;
if (tmp >= (unsigned long) &_etext)
continue;
alpha: Convert print_symbol to %pSR Use the new vsprintf extension to avoid any possible message interleaving. Reviewed-by: Matt Turner <mattst88@gmail.com> Signed-off-by: Matt Turner <mattst88@gmail.com> Signed-off-by: Joe Perches <joe@perches.com>
2012-12-12 11:18:51 -07:00
printk("[<%lx>] %pSR\n", tmp, (void *)tmp);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
if (i > 40) {
printk(" ...");
break;
}
}
printk("\n");
}
static int kstack_depth_to_print = 24;
void show_stack(struct task_struct *task, unsigned long *sp)
{
unsigned long *stack;
int i;
/*
* debugging aid: "show_stack(NULL);" prints the
* back trace for this cpu.
*/
if(sp==NULL)
sp=(unsigned long*)&sp;
stack = sp;
for(i=0; i < kstack_depth_to_print; i++) {
if (((long) stack & (THREAD_SIZE-1)) == 0)
break;
alpha: fix formating of stack content Since version 4.9, the kernel automatically breaks printk calls into multiple newlines unless pr_cont is used. Fix the alpha stacktrace code, so that it prints stack trace in four columns, as it was initially intended. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org # v4.9+ Signed-off-by: Matt Turner <mattst88@gmail.com>
2018-01-02 12:00:32 -07:00
if ((i % 4) == 0) {
if (i)
pr_cont("\n");
printk(" ");
} else {
pr_cont(" ");
}
pr_cont("%016lx", *stack++);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
}
alpha: fix formating of stack content Since version 4.9, the kernel automatically breaks printk calls into multiple newlines unless pr_cont is used. Fix the alpha stacktrace code, so that it prints stack trace in four columns, as it was initially intended. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org # v4.9+ Signed-off-by: Matt Turner <mattst88@gmail.com>
2018-01-02 12:00:32 -07:00
pr_cont("\n");
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
dik_show_trace(sp);
}
void
die_if_kernel(char * str, struct pt_regs *regs, long err, unsigned long *r9_15)
{
if (regs->ps & 8)
return;
#ifdef CONFIG_SMP
printk("CPU %d ", hard_smp_processor_id());
#endif
Use helpers to obtain task pid in printks (arch code) One of the easiest things to isolate is the pid printed in kernel log. There was a patch, that made this for arch-independent code, this one makes so for arch/xxx files. It took some time to cross-compile it, but hopefully these are all the printks in arch code. Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 00:40:41 -06:00
printk("%s(%d): %s %ld\n", current->comm, task_pid_nr(current), str, err);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
dik_show_regs(regs, r9_15);
taint: add explicit flag to show whether lock dep is still OK. Fix up all callers as they were before, with make one change: an unsigned module taints the kernel, but doesn't turn off lockdep. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2013-01-20 23:47:39 -07:00
add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
dik_show_trace((unsigned long *)(regs+1));
dik_show_code((unsigned int *)regs->pc);
if (test_and_set_thread_flag (TIF_DIE_IF_KERNEL)) {
printk("die_if_kernel recursion detected.\n");
local_irq_enable();
while (1);
}
do_exit(SIGSEGV);
}
#ifndef CONFIG_MATHEMU
static long dummy_emul(void) { return 0; }
long (*alpha_fp_emul_imprecise)(struct pt_regs *regs, unsigned long writemask)
= (void *)dummy_emul;
alpha: math-emu: Fix modular build Commit 00fc0e0dda62 ("alpha: move exports to actual definitions") also removed the exports of the math emulator hooks, which are defined in C code. In case anyone cares about the option of CONFIG_MATHEMU=m, add exports next to those definitions. Also add a MODULE_LICENSE. Fixes: 00fc0e0dda62 ("alpha: move exports to actual definitions") Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Matt Turner <mattst88@gmail.com>
2017-07-18 18:02:04 -06:00
EXPORT_SYMBOL_GPL(alpha_fp_emul_imprecise);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
long (*alpha_fp_emul) (unsigned long pc)
= (void *)dummy_emul;
alpha: math-emu: Fix modular build Commit 00fc0e0dda62 ("alpha: move exports to actual definitions") also removed the exports of the math emulator hooks, which are defined in C code. In case anyone cares about the option of CONFIG_MATHEMU=m, add exports next to those definitions. Also add a MODULE_LICENSE. Fixes: 00fc0e0dda62 ("alpha: move exports to actual definitions") Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Matt Turner <mattst88@gmail.com>
2017-07-18 18:02:04 -06:00
EXPORT_SYMBOL_GPL(alpha_fp_emul);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#else
long alpha_fp_emul_imprecise(struct pt_regs *regs, unsigned long writemask);
long alpha_fp_emul (unsigned long pc);
#endif
asmlinkage void
do_entArith(unsigned long summary, unsigned long write_mask,
struct pt_regs *regs)
{
long si_code = FPE_FLTINV;
if (summary & 1) {
/* Software-completion summary bit is set, so try to
emulate the instruction. If the processor supports
precise exceptions, we don't have to search. */
if (!amask(AMASK_PRECISE_TRAP))
si_code = alpha_fp_emul(regs->pc - 4);
else
si_code = alpha_fp_emul_imprecise(regs, write_mask);
if (si_code == 0)
return;
}
die_if_kernel("Arithmetic fault", regs, 0, NULL);
signal/alpha: Use send_sig_fault where appropriate Filling in struct siginfo before calling send_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper send_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls send_sig_info. In short about a 5 line reduction in code for every time send_sig_info is called, which makes the calling function clearer. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 16:37:49 -06:00
send_sig_fault(SIGFPE, si_code, (void __user *) regs->pc, 0, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
}
asmlinkage void
do_entIF(unsigned long type, struct pt_regs *regs)
{
int signo, code;
[PATCH] alpha smp fix As usual, the reason of this breakage is quite silly: in do_entIF, we are checking for PS == 0 to see whether it was a kernel BUG() or userspace trap. It works, unless BUG() happens in interrupt - PS is not 0 in kernel mode due to non-zero IPL, and the things get messed up horribly then. In this particular case it was BUG_ON(!irqs_disabled()) triggered in run_posix_cpu_timers(), so we ended up shooting "current" with the bursts of one SIGTRAP and three SIGILLs on every timer tick. ;-)
2005-06-30 10:02:18 -06:00
if ((regs->ps & ~IPL_MAX) == 0) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
if (type == 1) {
const unsigned int *data
= (const unsigned int *) regs->pc;
printk("Kernel bug at %s:%d\n",
(const char *)(data[1] | (long)data[2] << 32),
data[0]);
}
alpha: Primitive support for CPU power down. Use WTINT to wait for the next interrupt. Squash the WTINT call if the PALcode doesn't support it (e.g. MILO). No attempt is yet made to skip clock ticks during normal scheduling in order to stay in power down mode longer. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-07-12 10:36:21 -06:00
#ifdef CONFIG_ALPHA_WTINT
if (type == 4) {
/* If CALL_PAL WTINT is totally unsupported by the
PALcode, e.g. MILO, "emulate" it by overwriting
the insn. */
unsigned int *pinsn
= (unsigned int *) regs->pc - 1;
if (*pinsn == PAL_wtint) {
*pinsn = 0x47e01400; /* mov 0,$0 */
imb();
regs->r0 = 0;
return;
}
}
#endif /* ALPHA_WTINT */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
die_if_kernel((type == 1 ? "Kernel Bug" : "Instruction fault"),
regs, type, NULL);
}
switch (type) {
case 0: /* breakpoint */
if (ptrace_cancel_bpt(current)) {
regs->pc -= 4; /* make pc point to former bpt */
}
signal/alpha: Use send_sig_fault where appropriate Filling in struct siginfo before calling send_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper send_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls send_sig_info. In short about a 5 line reduction in code for every time send_sig_info is called, which makes the calling function clearer. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 16:37:49 -06:00
send_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->pc, 0,
current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
return;
case 1: /* bugcheck */
signal/alpha: Use send_sig_fault where appropriate Filling in struct siginfo before calling send_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper send_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls send_sig_info. In short about a 5 line reduction in code for every time send_sig_info is called, which makes the calling function clearer. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 16:37:49 -06:00
send_sig_fault(SIGTRAP, TRAP_UNK, (void __user *) regs->pc, 0,
current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
return;
case 2: /* gentrap */
switch ((long) regs->r16) {
case GEN_INTOVF:
signo = SIGFPE;
code = FPE_INTOVF;
break;
case GEN_INTDIV:
signo = SIGFPE;
code = FPE_INTDIV;
break;
case GEN_FLTOVF:
signo = SIGFPE;
code = FPE_FLTOVF;
break;
case GEN_FLTDIV:
signo = SIGFPE;
code = FPE_FLTDIV;
break;
case GEN_FLTUND:
signo = SIGFPE;
code = FPE_FLTUND;
break;
case GEN_FLTINV:
signo = SIGFPE;
code = FPE_FLTINV;
break;
case GEN_FLTINE:
signo = SIGFPE;
code = FPE_FLTRES;
break;
case GEN_ROPRAND:
signo = SIGFPE;
signal/alpha: Replace FPE_FIXME with FPE_FLTUNK Using an si_code of 0 that aliases with SI_USER is clearly the wrong thing todo, and causes problems in interesting ways. The newly defined FPE_FLTUNK semantically appears to fit the bill so use it instead. Given recent experience in this area odds are it will not break anything. Fixing it removes a hazard to kernel maintenance. Cc: Helge Deller <deller@gmx.de> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: linux-alpha@vger.kernel.org History Tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git Fixes: 0a635c7a84cf ("Fill in siginfo_t.") Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 15:04:57 -06:00
code = FPE_FLTUNK;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
break;
case GEN_DECOVF:
case GEN_DECDIV:
case GEN_DECINV:
case GEN_ASSERTERR:
case GEN_NULPTRERR:
case GEN_STKOVF:
case GEN_STRLENERR:
case GEN_SUBSTRERR:
case GEN_RANGERR:
case GEN_SUBRNG:
case GEN_SUBRNG1:
case GEN_SUBRNG2:
case GEN_SUBRNG3:
case GEN_SUBRNG4:
case GEN_SUBRNG5:
case GEN_SUBRNG6:
case GEN_SUBRNG7:
default:
signo = SIGTRAP;
signal/alpha: Replace TRAP_FIXME with TRAP_UNK Using an si_code of 0 that aliases with SI_USER is clearly the wrong thing to do, and causes problems in interesting ways. For it really is not clear to me if using TRAP_UNK bugcheck or the default case of gentrap is really the best way to handle things. There is certainly enough information that that a more specific si_code could potentially be used. That said TRAP_UNK is definitely an improvement over 0 as it removes the ambiguiuty of what si_code of 0 with SIGTRAP means on alpha. Recent history suggests no actually cares about crazy corner cases of the kernel behavior like this so I don't expect any regressions from changing this. However if something does happen this change is easy to revert. Cc: Helge Deller <deller@gmx.de> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: linux-alpha@vger.kernel.org Fixes: 0a635c7a84cf ("Fill in siginfo_t.") History Tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 16:30:31 -06:00
code = TRAP_UNK;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
break;
}
signal/alpha: Use send_sig_fault where appropriate Filling in struct siginfo before calling send_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper send_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls send_sig_info. In short about a 5 line reduction in code for every time send_sig_info is called, which makes the calling function clearer. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 16:37:49 -06:00
send_sig_fault(signo, code, (void __user *) regs->pc, regs->r16,
current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
return;
case 4: /* opDEC */
if (implver() == IMPLVER_EV4) {
long si_code;
/* The some versions of SRM do not handle
the opDEC properly - they return the PC of the
opDEC fault, not the instruction after as the
Alpha architecture requires. Here we fix it up.
We do this by intentionally causing an opDEC
fault during the boot sequence and testing if
we get the correct PC. If not, we set a flag
to correct it every time through. */
regs->pc += opDEC_fix;
/* EV4 does not implement anything except normal
rounding. Everything else will come here as
an illegal instruction. Emulate them. */
si_code = alpha_fp_emul(regs->pc - 4);
if (si_code == 0)
return;
if (si_code > 0) {
signal/alpha: Use send_sig_fault where appropriate Filling in struct siginfo before calling send_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper send_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls send_sig_info. In short about a 5 line reduction in code for every time send_sig_info is called, which makes the calling function clearer. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 16:37:49 -06:00
send_sig_fault(SIGFPE, si_code,
(void __user *) regs->pc, 0,
current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
return;
}
}
break;
case 3: /* FEN fault */
/* Irritating users can call PAL_clrfen to disable the
FPU for the process. The kernel will then trap in
do_switch_stack and undo_switch_stack when we try
to save and restore the FP registers.
Given that GCC by default generates code that uses the
FP registers, PAL_clrfen is not useful except for DoS
attacks. So turn the bleeding FPU back on and be done
with it. */
current_thread_info()->pcb.flags |= 1;
__reload_thread(&current_thread_info()->pcb);
return;
case 5: /* illoc */
default: /* unexpected instruction-fault type */
;
}
signal/alpha: Use send_sig_fault where appropriate Filling in struct siginfo before calling send_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper send_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls send_sig_info. In short about a 5 line reduction in code for every time send_sig_info is called, which makes the calling function clearer. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 16:37:49 -06:00
send_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)regs->pc, 0, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
}
/* There is an ifdef in the PALcode in MILO that enables a
"kernel debugging entry point" as an unprivileged call_pal.
We don't want to have anything to do with it, but unfortunately
several versions of MILO included in distributions have it enabled,
and if we don't put something on the entry point we'll oops. */
asmlinkage void
do_entDbg(struct pt_regs *regs)
{
die_if_kernel("Instruction fault", regs, 0, NULL);
signal: Remove the task parameter from force_sig_fault As synchronous exceptions really only make sense against the current task (otherwise how are you synchronous) remove the task parameter from from force_sig_fault to make it explicit that is what is going on. The two known exceptions that deliver a synchronous exception to a stopped ptraced task have already been changed to force_sig_fault_to_task. The callers have been changed with the following emacs regular expression (with obvious variations on the architectures that take more arguments) to avoid typos: force_sig_fault[(]\([^,]+\)[,]\([^,]+\)[,]\([^,]+\)[,]\W+current[)] -> force_sig_fault(\1,\2,\3) Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2019-05-23 10:04:24 -06:00
force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)regs->pc, 0);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
}
/*
* entUna has a different register layout to be reasonably simple. It
* needs access to all the integer registers (the kernel doesn't use
* fp-regs), and it needs to have them in order for simpler access.
*
* Due to the non-standard register layout (and because we don't want
* to handle floating-point regs), user-mode unaligned accesses are
* handled separately by do_entUnaUser below.
*
* Oh, btw, we don't handle the "gp" register correctly, but if we fault
* on a gp-register unaligned load/store, something is _very_ wrong
* in the kernel anyway..
*/
struct allregs {
unsigned long regs[32];
unsigned long ps, pc, gp, a0, a1, a2;
};
struct unaligned_stat {
unsigned long count, va, pc;
} unaligned[2];
/* Macro for exception fixup code to access integer registers. */
alpha: fix compile failures with gcc-4.3 (bug #10438) Vast majority of these build failures are gcc-4.3 warnings about static functions and objects being referenced from non-static (read: "extern inline") functions, in conjunction with our -Werror. We cannot just convert "extern inline" to "static inline", as people keep suggesting all the time, because "extern inline" logic is crucial for generic kernel build. So - just make sure that all callees of critical "extern inline" functions are also "extern inline"; - use "static inline", wherever it's possible. traps.c: work around gcc-4.3 being too smart about array bounds-checking. TODO: add "gnu_inline" attribute to all our "extern inline" functions to ensure desired behaviour with future compilers. Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-20 17:28:31 -06:00
#define una_reg(r) (_regs[(r) >= 16 && (r) <= 18 ? (r)+19 : (r)])
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
asmlinkage void
do_entUna(void * va, unsigned long opcode, unsigned long reg,
[PATCH] alpha: fix kernel alignment traps Pass in the pointer to the on-stack registers rather than using them directly as the arguments. Ivan noticed that I missed a spot when purging the registers as first stack parameter idiom. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-02 13:49:52 -06:00
struct allregs *regs)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
{
long error, tmp1, tmp2, tmp3, tmp4;
[PATCH] alpha: fix kernel alignment traps Pass in the pointer to the on-stack registers rather than using them directly as the arguments. Ivan noticed that I missed a spot when purging the registers as first stack parameter idiom. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-02 13:49:52 -06:00
unsigned long pc = regs->pc - 4;
alpha: fix compile failures with gcc-4.3 (bug #10438) Vast majority of these build failures are gcc-4.3 warnings about static functions and objects being referenced from non-static (read: "extern inline") functions, in conjunction with our -Werror. We cannot just convert "extern inline" to "static inline", as people keep suggesting all the time, because "extern inline" logic is crucial for generic kernel build. So - just make sure that all callees of critical "extern inline" functions are also "extern inline"; - use "static inline", wherever it's possible. traps.c: work around gcc-4.3 being too smart about array bounds-checking. TODO: add "gnu_inline" attribute to all our "extern inline" functions to ensure desired behaviour with future compilers. Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-20 17:28:31 -06:00
unsigned long *_regs = regs->regs;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
const struct exception_table_entry *fixup;
unaligned[0].count++;
unaligned[0].va = (unsigned long) va;
unaligned[0].pc = pc;
/* We don't want to use the generic get/put unaligned macros as
we want to trap exceptions. Only if we actually get an
exception will we decide whether we should have caught it. */
switch (opcode) {
case 0x0c: /* ldwu */
__asm__ __volatile__(
"1: ldq_u %1,0(%3)\n"
"2: ldq_u %2,1(%3)\n"
" extwl %1,%3,%1\n"
" extwh %2,%3,%2\n"
"3:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
goto got_exception;
una_reg(reg) = tmp1|tmp2;
return;
case 0x28: /* ldl */
__asm__ __volatile__(
"1: ldq_u %1,0(%3)\n"
"2: ldq_u %2,3(%3)\n"
" extll %1,%3,%1\n"
" extlh %2,%3,%2\n"
"3:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
goto got_exception;
una_reg(reg) = (int)(tmp1|tmp2);
return;
case 0x29: /* ldq */
__asm__ __volatile__(
"1: ldq_u %1,0(%3)\n"
"2: ldq_u %2,7(%3)\n"
" extql %1,%3,%1\n"
" extqh %2,%3,%2\n"
"3:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
goto got_exception;
una_reg(reg) = tmp1|tmp2;
return;
/* Note that the store sequences do not indicate that they change
memory because it _should_ be affecting nothing in this context.
(Otherwise we have other, much larger, problems.) */
case 0x0d: /* stw */
__asm__ __volatile__(
"1: ldq_u %2,1(%5)\n"
"2: ldq_u %1,0(%5)\n"
" inswh %6,%5,%4\n"
" inswl %6,%5,%3\n"
" mskwh %2,%5,%2\n"
" mskwl %1,%5,%1\n"
" or %2,%4,%2\n"
" or %1,%3,%1\n"
"3: stq_u %2,1(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,5b,%2,%0)
EXC(2b,5b,%1,%0)
EXC(3b,5b,$31,%0)
EXC(4b,5b,$31,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(una_reg(reg)), "0"(0));
if (error)
goto got_exception;
return;
case 0x2c: /* stl */
__asm__ __volatile__(
"1: ldq_u %2,3(%5)\n"
"2: ldq_u %1,0(%5)\n"
" inslh %6,%5,%4\n"
" insll %6,%5,%3\n"
" msklh %2,%5,%2\n"
" mskll %1,%5,%1\n"
" or %2,%4,%2\n"
" or %1,%3,%1\n"
"3: stq_u %2,3(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,5b,%2,%0)
EXC(2b,5b,%1,%0)
EXC(3b,5b,$31,%0)
EXC(4b,5b,$31,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(una_reg(reg)), "0"(0));
if (error)
goto got_exception;
return;
case 0x2d: /* stq */
__asm__ __volatile__(
"1: ldq_u %2,7(%5)\n"
"2: ldq_u %1,0(%5)\n"
" insqh %6,%5,%4\n"
" insql %6,%5,%3\n"
" mskqh %2,%5,%2\n"
" mskql %1,%5,%1\n"
" or %2,%4,%2\n"
" or %1,%3,%1\n"
"3: stq_u %2,7(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,5b,%2,%0)
EXC(2b,5b,%1,%0)
EXC(3b,5b,$31,%0)
EXC(4b,5b,$31,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(una_reg(reg)), "0"(0));
if (error)
goto got_exception;
return;
}
alpha: convert u64 to unsigned long long Convert alpha architecture to use u64 as unsigned long long. This is being done so that (a) all arches use u64 as unsigned long long and (b) printk of a u64 as %ll[ux] will not generate format warnings by gcc. The only gcc cross-compiler that I have is 4.0.2, which generates errors about miscompiling __weak references, so I have commented out that line in compiler-gcc4.h so that most of these compile, but more builds and real machine testing would be Real Good. [akpm@linux-foundation.org: fix warning] [akpm@linux-foundation.org: fix build] [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> From: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-03-31 16:23:36 -06:00
printk("Bad unaligned kernel access at %016lx: %p %lx %lu\n",
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
pc, va, opcode, reg);
do_exit(SIGSEGV);
got_exception:
/* Ok, we caught the exception, but we don't want it. Is there
someone to pass it along to? */
if ((fixup = search_exception_tables(pc)) != 0) {
unsigned long newpc;
newpc = fixup_exception(una_reg, fixup, pc);
printk("Forwarding unaligned exception at %lx (%lx)\n",
pc, newpc);
[PATCH] alpha: fix kernel alignment traps Pass in the pointer to the on-stack registers rather than using them directly as the arguments. Ivan noticed that I missed a spot when purging the registers as first stack parameter idiom. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-02 13:49:52 -06:00
regs->pc = newpc;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
return;
}
/*
* Yikes! No one to forward the exception to.
* Since the registers are in a weird format, dump them ourselves.
*/
printk("%s(%d): unhandled unaligned exception\n",
Use helpers to obtain task pid in printks (arch code) One of the easiest things to isolate is the pid printed in kernel log. There was a patch, that made this for arch-independent code, this one makes so for arch/xxx files. It took some time to cross-compile it, but hopefully these are all the printks in arch code. Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 00:40:41 -06:00
current->comm, task_pid_nr(current));
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
printk("pc = [<%016lx>] ra = [<%016lx>] ps = %04lx\n",
[PATCH] alpha: fix kernel alignment traps Pass in the pointer to the on-stack registers rather than using them directly as the arguments. Ivan noticed that I missed a spot when purging the registers as first stack parameter idiom. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-02 13:49:52 -06:00
pc, una_reg(26), regs->ps);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
printk("r0 = %016lx r1 = %016lx r2 = %016lx\n",
una_reg(0), una_reg(1), una_reg(2));
printk("r3 = %016lx r4 = %016lx r5 = %016lx\n",
una_reg(3), una_reg(4), una_reg(5));
printk("r6 = %016lx r7 = %016lx r8 = %016lx\n",
una_reg(6), una_reg(7), una_reg(8));
printk("r9 = %016lx r10= %016lx r11= %016lx\n",
una_reg(9), una_reg(10), una_reg(11));
printk("r12= %016lx r13= %016lx r14= %016lx\n",
una_reg(12), una_reg(13), una_reg(14));
printk("r15= %016lx\n", una_reg(15));
printk("r16= %016lx r17= %016lx r18= %016lx\n",
una_reg(16), una_reg(17), una_reg(18));
printk("r19= %016lx r20= %016lx r21= %016lx\n",
una_reg(19), una_reg(20), una_reg(21));
printk("r22= %016lx r23= %016lx r24= %016lx\n",
una_reg(22), una_reg(23), una_reg(24));
printk("r25= %016lx r27= %016lx r28= %016lx\n",
una_reg(25), una_reg(27), una_reg(28));
[PATCH] alpha: fix kernel alignment traps Pass in the pointer to the on-stack registers rather than using them directly as the arguments. Ivan noticed that I missed a spot when purging the registers as first stack parameter idiom. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-02 13:49:52 -06:00
printk("gp = %016lx sp = %p\n", regs->gp, regs+1);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
dik_show_code((unsigned int *)pc);
[PATCH] alpha: fix kernel alignment traps Pass in the pointer to the on-stack registers rather than using them directly as the arguments. Ivan noticed that I missed a spot when purging the registers as first stack parameter idiom. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-02 13:49:52 -06:00
dik_show_trace((unsigned long *)(regs+1));
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
if (test_and_set_thread_flag (TIF_DIE_IF_KERNEL)) {
printk("die_if_kernel recursion detected.\n");
local_irq_enable();
while (1);
}
do_exit(SIGSEGV);
}
/*
* Convert an s-floating point value in memory format to the
* corresponding value in register format. The exponent
* needs to be remapped to preserve non-finite values
* (infinities, not-a-numbers, denormals).
*/
static inline unsigned long
s_mem_to_reg (unsigned long s_mem)
{
unsigned long frac = (s_mem >> 0) & 0x7fffff;
unsigned long sign = (s_mem >> 31) & 0x1;
unsigned long exp_msb = (s_mem >> 30) & 0x1;
unsigned long exp_low = (s_mem >> 23) & 0x7f;
unsigned long exp;
exp = (exp_msb << 10) | exp_low; /* common case */
if (exp_msb) {
if (exp_low == 0x7f) {
exp = 0x7ff;
}
} else {
if (exp_low == 0x00) {
exp = 0x000;
} else {
exp |= (0x7 << 7);
}
}
return (sign << 63) | (exp << 52) | (frac << 29);
}
/*
* Convert an s-floating point value in register format to the
* corresponding value in memory format.
*/
static inline unsigned long
s_reg_to_mem (unsigned long s_reg)
{
return ((s_reg >> 62) << 30) | ((s_reg << 5) >> 34);
}
/*
* Handle user-level unaligned fault. Handling user-level unaligned
* faults is *extremely* slow and produces nasty messages. A user
* program *should* fix unaligned faults ASAP.
*
* Notice that we have (almost) the regular kernel stack layout here,
* so finding the appropriate registers is a little more difficult
* than in the kernel case.
*
* Finally, we handle regular integer load/stores only. In
* particular, load-linked/store-conditionally and floating point
* load/stores are not supported. The former make no sense with
* unaligned faults (they are guaranteed to fail) and I don't think
* the latter will occur in any decent program.
*
* Sigh. We *do* have to handle some FP operations, because GCC will
* uses them as temporary storage for integer memory to memory copies.
* However, we need to deal with stt/ldt and sts/lds only.
*/
#define OP_INT_MASK ( 1L << 0x28 | 1L << 0x2c /* ldl stl */ \
| 1L << 0x29 | 1L << 0x2d /* ldq stq */ \
| 1L << 0x0c | 1L << 0x0d /* ldwu stw */ \
| 1L << 0x0a | 1L << 0x0e ) /* ldbu stb */
#define OP_WRITE_MASK ( 1L << 0x26 | 1L << 0x27 /* sts stt */ \
| 1L << 0x2c | 1L << 0x2d /* stl stq */ \
| 1L << 0x0d | 1L << 0x0e ) /* stw stb */
#define R(x) ((size_t) &((struct pt_regs *)0)->x)
static int unauser_reg_offsets[32] = {
R(r0), R(r1), R(r2), R(r3), R(r4), R(r5), R(r6), R(r7), R(r8),
/* r9 ... r15 are stored in front of regs. */
-56, -48, -40, -32, -24, -16, -8,
R(r16), R(r17), R(r18),
R(r19), R(r20), R(r21), R(r22), R(r23), R(r24), R(r25), R(r26),
R(r27), R(r28), R(gp),
0, 0
};
#undef R
asmlinkage void
do_entUnaUser(void __user * va, unsigned long opcode,
unsigned long reg, struct pt_regs *regs)
{
alpha: use __ratelimit Replace open-coded rate limiting logic with __ratelimit(). Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: Matt Turner <mattst88@gmail.com>
2010-03-01 11:25:49 -07:00
static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
unsigned long tmp1, tmp2, tmp3, tmp4;
unsigned long fake_reg, *reg_addr = &fake_reg;
signal/alpha: Use send_sig_fault where appropriate Filling in struct siginfo before calling send_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper send_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls send_sig_info. In short about a 5 line reduction in code for every time send_sig_info is called, which makes the calling function clearer. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 16:37:49 -06:00
int si_code;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
long error;
/* Check the UAC bits to decide what the user wants us to do
with the unaliged access. */
alpha: separate thread-synchronous flags ... and fix the race in updating unaligned control ones Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-20 08:52:23 -06:00
if (!(current_thread_info()->status & TS_UAC_NOPRINT)) {
alpha: use __ratelimit Replace open-coded rate limiting logic with __ratelimit(). Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: Matt Turner <mattst88@gmail.com>
2010-03-01 11:25:49 -07:00
if (__ratelimit(&ratelimit)) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
printk("%s(%d): unaligned trap at %016lx: %p %lx %ld\n",
Use helpers to obtain task pid in printks (arch code) One of the easiest things to isolate is the pid printed in kernel log. There was a patch, that made this for arch-independent code, this one makes so for arch/xxx files. It took some time to cross-compile it, but hopefully these are all the printks in arch code. Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 00:40:41 -06:00
current->comm, task_pid_nr(current),
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
regs->pc - 4, va, opcode, reg);
}
}
alpha: separate thread-synchronous flags ... and fix the race in updating unaligned control ones Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-20 08:52:23 -06:00
if ((current_thread_info()->status & TS_UAC_SIGBUS))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
goto give_sigbus;
/* Not sure why you'd want to use this, but... */
alpha: separate thread-synchronous flags ... and fix the race in updating unaligned control ones Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-20 08:52:23 -06:00
if ((current_thread_info()->status & TS_UAC_NOFIX))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
return;
/* Don't bother reading ds in the access check since we already
know that this came from the user. Also rely on the fact that
the page at TASK_SIZE is unmapped and so can't be touched anyway. */
alpha: don't bother with __access_ok() in traps.c we want to check that address is below TASK_SIZE; sure, __access_ok(addr, 0, USER_DS) will do that, but it's more straightforward to just spell it out and that way we can get rid of the damn 'segment' argument of __access_ok(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-27 00:23:46 -07:00
if ((unsigned long)va >= TASK_SIZE)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
goto give_sigsegv;
++unaligned[1].count;
unaligned[1].va = (unsigned long)va;
unaligned[1].pc = regs->pc - 4;
if ((1L << opcode) & OP_INT_MASK) {
/* it's an integer load/store */
if (reg < 30) {
reg_addr = (unsigned long *)
((char *)regs + unauser_reg_offsets[reg]);
} else if (reg == 30) {
/* usp in PAL regs */
fake_reg = rdusp();
} else {
/* zero "register" */
fake_reg = 0;
}
}
/* We don't want to use the generic get/put unaligned macros as
we want to trap exceptions. Only if we actually get an
exception will we decide whether we should have caught it. */
switch (opcode) {
case 0x0c: /* ldwu */
__asm__ __volatile__(
"1: ldq_u %1,0(%3)\n"
"2: ldq_u %2,1(%3)\n"
" extwl %1,%3,%1\n"
" extwh %2,%3,%2\n"
"3:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
goto give_sigsegv;
*reg_addr = tmp1|tmp2;
break;
case 0x22: /* lds */
__asm__ __volatile__(
"1: ldq_u %1,0(%3)\n"
"2: ldq_u %2,3(%3)\n"
" extll %1,%3,%1\n"
" extlh %2,%3,%2\n"
"3:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
goto give_sigsegv;
alpha_write_fp_reg(reg, s_mem_to_reg((int)(tmp1|tmp2)));
return;
case 0x23: /* ldt */
__asm__ __volatile__(
"1: ldq_u %1,0(%3)\n"
"2: ldq_u %2,7(%3)\n"
" extql %1,%3,%1\n"
" extqh %2,%3,%2\n"
"3:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
goto give_sigsegv;
alpha_write_fp_reg(reg, tmp1|tmp2);
return;
case 0x28: /* ldl */
__asm__ __volatile__(
"1: ldq_u %1,0(%3)\n"
"2: ldq_u %2,3(%3)\n"
" extll %1,%3,%1\n"
" extlh %2,%3,%2\n"
"3:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
goto give_sigsegv;
*reg_addr = (int)(tmp1|tmp2);
break;
case 0x29: /* ldq */
__asm__ __volatile__(
"1: ldq_u %1,0(%3)\n"
"2: ldq_u %2,7(%3)\n"
" extql %1,%3,%1\n"
" extqh %2,%3,%2\n"
"3:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
goto give_sigsegv;
*reg_addr = tmp1|tmp2;
break;
/* Note that the store sequences do not indicate that they change
memory because it _should_ be affecting nothing in this context.
(Otherwise we have other, much larger, problems.) */
case 0x0d: /* stw */
__asm__ __volatile__(
"1: ldq_u %2,1(%5)\n"
"2: ldq_u %1,0(%5)\n"
" inswh %6,%5,%4\n"
" inswl %6,%5,%3\n"
" mskwh %2,%5,%2\n"
" mskwl %1,%5,%1\n"
" or %2,%4,%2\n"
" or %1,%3,%1\n"
"3: stq_u %2,1(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,5b,%2,%0)
EXC(2b,5b,%1,%0)
EXC(3b,5b,$31,%0)
EXC(4b,5b,$31,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(*reg_addr), "0"(0));
if (error)
goto give_sigsegv;
return;
case 0x26: /* sts */
fake_reg = s_reg_to_mem(alpha_read_fp_reg(reg));
/* FALLTHRU */
case 0x2c: /* stl */
__asm__ __volatile__(
"1: ldq_u %2,3(%5)\n"
"2: ldq_u %1,0(%5)\n"
" inslh %6,%5,%4\n"
" insll %6,%5,%3\n"
" msklh %2,%5,%2\n"
" mskll %1,%5,%1\n"
" or %2,%4,%2\n"
" or %1,%3,%1\n"
"3: stq_u %2,3(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,5b,%2,%0)
EXC(2b,5b,%1,%0)
EXC(3b,5b,$31,%0)
EXC(4b,5b,$31,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(*reg_addr), "0"(0));
if (error)
goto give_sigsegv;
return;
case 0x27: /* stt */
fake_reg = alpha_read_fp_reg(reg);
/* FALLTHRU */
case 0x2d: /* stq */
__asm__ __volatile__(
"1: ldq_u %2,7(%5)\n"
"2: ldq_u %1,0(%5)\n"
" insqh %6,%5,%4\n"
" insql %6,%5,%3\n"
" mskqh %2,%5,%2\n"
" mskql %1,%5,%1\n"
" or %2,%4,%2\n"
" or %1,%3,%1\n"
"3: stq_u %2,7(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
alpha: add a helper for emitting exception table entries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-03-07 02:08:46 -07:00
EXC(1b,5b,%2,%0)
EXC(2b,5b,%1,%0)
EXC(3b,5b,$31,%0)
EXC(4b,5b,$31,%0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(*reg_addr), "0"(0));
if (error)
goto give_sigsegv;
return;
default:
/* What instruction were you trying to use, exactly? */
goto give_sigbus;
}
/* Only integer loads should get here; everyone else returns early. */
if (reg == 30)
wrusp(fake_reg);
return;
give_sigsegv:
regs->pc -= 4; /* make pc point to faulting insn */
/* We need to replicate some of the logic in mm/fault.c,
since we don't have access to the fault code in the
exception handling return path. */
alpha: don't bother with __access_ok() in traps.c we want to check that address is below TASK_SIZE; sure, __access_ok(addr, 0, USER_DS) will do that, but it's more straightforward to just spell it out and that way we can get rid of the damn 'segment' argument of __access_ok(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-27 00:23:46 -07:00
if ((unsigned long)va >= TASK_SIZE)
signal/alpha: Use send_sig_fault where appropriate Filling in struct siginfo before calling send_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper send_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls send_sig_info. In short about a 5 line reduction in code for every time send_sig_info is called, which makes the calling function clearer. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 16:37:49 -06:00
si_code = SEGV_ACCERR;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
else {
struct mm_struct *mm = current->mm;
down_read(&mm->mmap_sem);
if (find_vma(mm, (unsigned long)va))
signal/alpha: Use send_sig_fault where appropriate Filling in struct siginfo before calling send_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper send_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls send_sig_info. In short about a 5 line reduction in code for every time send_sig_info is called, which makes the calling function clearer. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 16:37:49 -06:00
si_code = SEGV_ACCERR;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
else
signal/alpha: Use send_sig_fault where appropriate Filling in struct siginfo before calling send_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper send_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls send_sig_info. In short about a 5 line reduction in code for every time send_sig_info is called, which makes the calling function clearer. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 16:37:49 -06:00
si_code = SEGV_MAPERR;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
up_read(&mm->mmap_sem);
}
signal/alpha: Use send_sig_fault where appropriate Filling in struct siginfo before calling send_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper send_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls send_sig_info. In short about a 5 line reduction in code for every time send_sig_info is called, which makes the calling function clearer. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 16:37:49 -06:00
send_sig_fault(SIGSEGV, si_code, va, 0, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
return;
give_sigbus:
regs->pc -= 4;
signal/alpha: Use send_sig_fault where appropriate Filling in struct siginfo before calling send_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper send_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls send_sig_info. In short about a 5 line reduction in code for every time send_sig_info is called, which makes the calling function clearer. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-17 16:37:49 -06:00
send_sig_fault(SIGBUS, BUS_ADRALN, va, 0, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
return;
}
alpha: delete __cpuinit usage from all users The __cpuinit type of throwaway sections might have made sense some time ago when RAM was more constrained, but now the savings do not offset the cost and complications. For example, the fix in commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time") is a good example of the nasty type of bugs that can be created with improper use of the various __init prefixes. After a discussion on LKML[1] it was decided that cpuinit should go the way of devinit and be phased out. Once all the users are gone, we can then finally remove the macros themselves from linux/init.h. This removes all the alpha uses of the __cpuinit macros. [1] https://lkml.org/lkml/2013/5/20/589 Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2013-06-17 13:43:14 -06:00
void
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
trap_init(void)
{
/* Tell PAL-code what global pointer we want in the kernel. */
register unsigned long gptr __asm__("$29");
wrkgp(gptr);
/* Hack for Multia (UDB) and JENSEN: some of their SRMs have
a bug in the handling of the opDEC fault. Fix it up if so. */
if (implver() == IMPLVER_EV4)
opDEC_check();
wrent(entArith, 1);
wrent(entMM, 2);
wrent(entIF, 3);
wrent(entUna, 4);
wrent(entSys, 5);
wrent(entDbg, 6);
}