2008-03-08 05:34:17 +07:00
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/*
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* kgdbts is a test suite for kgdb for the sole purpose of validating
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* that key pieces of the kgdb internals are working properly such as
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* HW/SW breakpoints, single stepping, and NMI.
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*
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* Created by: Jason Wessel <jason.wessel@windriver.com>
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*
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* Copyright (c) 2008 Wind River Systems, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Information about the kgdb test suite.
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* -------------------------------------
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*
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* The kgdb test suite is designed as a KGDB I/O module which
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* simulates the communications that a debugger would have with kgdb.
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* The tests are broken up in to a line by line and referenced here as
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* a "get" which is kgdb requesting input and "put" which is kgdb
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* sending a response.
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*
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* The kgdb suite can be invoked from the kernel command line
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* arguments system or executed dynamically at run time. The test
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* suite uses the variable "kgdbts" to obtain the information about
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* which tests to run and to configure the verbosity level. The
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* following are the various characters you can use with the kgdbts=
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* line:
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*
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* When using the "kgdbts=" you only choose one of the following core
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* test types:
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* A = Run all the core tests silently
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* V1 = Run all the core tests with minimal output
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* V2 = Run all the core tests in debug mode
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*
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* You can also specify optional tests:
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* N## = Go to sleep with interrupts of for ## seconds
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* to test the HW NMI watchdog
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* F## = Break at do_fork for ## iterations
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* S## = Break at sys_open for ## iterations
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2008-04-25 04:57:23 +07:00
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* I## = Run the single step test ## iterations
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2008-03-08 05:34:17 +07:00
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*
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* NOTE: that the do_fork and sys_open tests are mutually exclusive.
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*
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* To invoke the kgdb test suite from boot you use a kernel start
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* argument as follows:
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* kgdbts=V1 kgdbwait
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* Or if you wanted to perform the NMI test for 6 seconds and do_fork
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* test for 100 forks, you could use:
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* kgdbts=V1N6F100 kgdbwait
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*
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* The test suite can also be invoked at run time with:
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* echo kgdbts=V1N6F100 > /sys/module/kgdbts/parameters/kgdbts
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* Or as another example:
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* echo kgdbts=V2 > /sys/module/kgdbts/parameters/kgdbts
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*
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* When developing a new kgdb arch specific implementation or
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* using these tests for the purpose of regression testing,
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* several invocations are required.
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*
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* 1) Boot with the test suite enabled by using the kernel arguments
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* "kgdbts=V1F100 kgdbwait"
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* ## If kgdb arch specific implementation has NMI use
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* "kgdbts=V1N6F100
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*
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* 2) After the system boot run the basic test.
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* echo kgdbts=V1 > /sys/module/kgdbts/parameters/kgdbts
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*
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* 3) Run the concurrency tests. It is best to use n+1
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* while loops where n is the number of cpus you have
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* in your system. The example below uses only two
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* loops.
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*
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* ## This tests break points on sys_open
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* while [ 1 ] ; do find / > /dev/null 2>&1 ; done &
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* while [ 1 ] ; do find / > /dev/null 2>&1 ; done &
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* echo kgdbts=V1S10000 > /sys/module/kgdbts/parameters/kgdbts
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* fg # and hit control-c
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* fg # and hit control-c
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* ## This tests break points on do_fork
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* while [ 1 ] ; do date > /dev/null ; done &
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* while [ 1 ] ; do date > /dev/null ; done &
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* echo kgdbts=V1F1000 > /sys/module/kgdbts/parameters/kgdbts
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* fg # and hit control-c
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*
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*/
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#include <linux/kernel.h>
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#include <linux/kgdb.h>
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#include <linux/ctype.h>
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#include <linux/uaccess.h>
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#include <linux/syscalls.h>
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#include <linux/nmi.h>
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#include <linux/delay.h>
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#include <linux/kthread.h>
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2011-07-04 02:14:56 +07:00
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#include <linux/module.h>
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2017-02-09 00:51:36 +07:00
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#include <linux/sched/task.h>
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2013-02-27 10:09:27 +07:00
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#include <asm/sections.h>
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2008-03-08 05:34:17 +07:00
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#define v1printk(a...) do { \
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if (verbose) \
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printk(KERN_INFO a); \
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} while (0)
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#define v2printk(a...) do { \
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if (verbose > 1) \
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printk(KERN_INFO a); \
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touch_nmi_watchdog(); \
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} while (0)
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2008-03-21 01:43:44 +07:00
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#define eprintk(a...) do { \
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printk(KERN_ERR a); \
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WARN_ON(1); \
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} while (0)
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2008-03-08 05:34:17 +07:00
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#define MAX_CONFIG_LEN 40
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static struct kgdb_io kgdbts_io_ops;
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static char get_buf[BUFMAX];
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static int get_buf_cnt;
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static char put_buf[BUFMAX];
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static int put_buf_cnt;
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static char scratch_buf[BUFMAX];
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static int verbose;
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static int repeat_test;
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static int test_complete;
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static int send_ack;
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static int final_ack;
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2008-05-29 00:49:57 +07:00
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static int force_hwbrks;
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static int hwbreaks_ok;
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2008-03-08 05:34:17 +07:00
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static int hw_break_val;
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static int hw_break_val2;
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2012-03-30 05:41:24 +07:00
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static int cont_instead_of_sstep;
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static unsigned long cont_thread_id;
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static unsigned long sstep_thread_id;
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2008-04-29 15:36:14 +07:00
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#if defined(CONFIG_ARM) || defined(CONFIG_MIPS) || defined(CONFIG_SPARC)
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2008-03-08 05:34:17 +07:00
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static int arch_needs_sstep_emulation = 1;
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#else
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static int arch_needs_sstep_emulation;
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#endif
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2012-03-30 05:41:24 +07:00
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static unsigned long cont_addr;
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2008-03-08 05:34:17 +07:00
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static unsigned long sstep_addr;
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2012-03-30 05:41:24 +07:00
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static int restart_from_top_after_write;
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2008-03-08 05:34:17 +07:00
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static int sstep_state;
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/* Storage for the registers, in GDB format. */
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static unsigned long kgdbts_gdb_regs[(NUMREGBYTES +
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sizeof(unsigned long) - 1) /
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sizeof(unsigned long)];
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static struct pt_regs kgdbts_regs;
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/* -1 = init not run yet, 0 = unconfigured, 1 = configured. */
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static int configured = -1;
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2008-03-21 01:43:44 +07:00
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#ifdef CONFIG_KGDB_TESTS_BOOT_STRING
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static char config[MAX_CONFIG_LEN] = CONFIG_KGDB_TESTS_BOOT_STRING;
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#else
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2008-03-08 05:34:17 +07:00
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static char config[MAX_CONFIG_LEN];
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2008-03-21 01:43:44 +07:00
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#endif
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2008-03-08 05:34:17 +07:00
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static struct kparam_string kps = {
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.string = config,
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.maxlen = MAX_CONFIG_LEN,
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};
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static void fill_get_buf(char *buf);
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struct test_struct {
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char *get;
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char *put;
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void (*get_handler)(char *);
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int (*put_handler)(char *, char *);
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};
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struct test_state {
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char *name;
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struct test_struct *tst;
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int idx;
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int (*run_test) (int, int);
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int (*validate_put) (char *);
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};
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static struct test_state ts;
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static int kgdbts_unreg_thread(void *ptr)
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{
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/* Wait until the tests are complete and then ungresiter the I/O
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* driver.
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*/
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while (!final_ack)
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msleep_interruptible(1500);
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2012-03-30 05:41:24 +07:00
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/* Pause for any other threads to exit after final ack. */
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msleep_interruptible(1000);
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2008-03-08 05:34:17 +07:00
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if (configured)
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kgdb_unregister_io_module(&kgdbts_io_ops);
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configured = 0;
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return 0;
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}
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/* This is noinline such that it can be used for a single location to
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* place a breakpoint
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*/
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static noinline void kgdbts_break_test(void)
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{
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v2printk("kgdbts: breakpoint complete\n");
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}
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/* Lookup symbol info in the kernel */
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static unsigned long lookup_addr(char *arg)
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{
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unsigned long addr = 0;
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if (!strcmp(arg, "kgdbts_break_test"))
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addr = (unsigned long)kgdbts_break_test;
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else if (!strcmp(arg, "sys_open"))
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2012-03-30 05:41:24 +07:00
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addr = (unsigned long)do_sys_open;
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2008-03-08 05:34:17 +07:00
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else if (!strcmp(arg, "do_fork"))
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clone: support passing tls argument via C rather than pt_regs magic
clone has some of the quirkiest syscall handling in the kernel, with a
pile of special cases, historical curiosities, and architecture-specific
calling conventions. In particular, clone with CLONE_SETTLS accepts a
parameter "tls" that the C entry point completely ignores and some
assembly entry points overwrite; instead, the low-level arch-specific
code pulls the tls parameter out of the arch-specific register captured
as part of pt_regs on entry to the kernel. That's a massive hack, and
it makes the arch-specific code only work when called via the specific
existing syscall entry points; because of this hack, any new clone-like
system call would have to accept an identical tls argument in exactly
the same arch-specific position, rather than providing a unified system
call entry point across architectures.
The first patch allows architectures to handle the tls argument via
normal C parameter passing, if they opt in by selecting
HAVE_COPY_THREAD_TLS. The second patch makes 32-bit and 64-bit x86 opt
into this.
These two patches came out of the clone4 series, which isn't ready for
this merge window, but these first two cleanup patches were entirely
uncontroversial and have acks. I'd like to go ahead and submit these
two so that other architectures can begin building on top of this and
opting into HAVE_COPY_THREAD_TLS. However, I'm also happy to wait and
send these through the next merge window (along with v3 of clone4) if
anyone would prefer that.
This patch (of 2):
clone with CLONE_SETTLS accepts an argument to set the thread-local
storage area for the new thread. sys_clone declares an int argument
tls_val in the appropriate point in the argument list (based on the
various CLONE_BACKWARDS variants), but doesn't actually use or pass along
that argument. Instead, sys_clone calls do_fork, which calls
copy_process, which calls the arch-specific copy_thread, and copy_thread
pulls the corresponding syscall argument out of the pt_regs captured at
kernel entry (knowing what argument of clone that architecture passes tls
in).
Apart from being awful and inscrutable, that also only works because only
one code path into copy_thread can pass the CLONE_SETTLS flag, and that
code path comes from sys_clone with its architecture-specific
argument-passing order. This prevents introducing a new version of the
clone system call without propagating the same architecture-specific
position of the tls argument.
However, there's no reason to pull the argument out of pt_regs when
sys_clone could just pass it down via C function call arguments.
Introduce a new CONFIG_HAVE_COPY_THREAD_TLS for architectures to opt into,
and a new copy_thread_tls that accepts the tls parameter as an additional
unsigned long (syscall-argument-sized) argument. Change sys_clone's tls
argument to an unsigned long (which does not change the ABI), and pass
that down to copy_thread_tls.
Architectures that don't opt into copy_thread_tls will continue to ignore
the C argument to sys_clone in favor of the pt_regs captured at kernel
entry, and thus will be unable to introduce new versions of the clone
syscall.
Patch co-authored by Josh Triplett and Thiago Macieira.
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thiago Macieira <thiago.macieira@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-06-26 05:01:19 +07:00
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addr = (unsigned long)_do_fork;
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2008-03-08 05:34:17 +07:00
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else if (!strcmp(arg, "hw_break_val"))
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addr = (unsigned long)&hw_break_val;
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2013-02-27 10:09:27 +07:00
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addr = (unsigned long) dereference_function_descriptor((void *)addr);
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2008-03-08 05:34:17 +07:00
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return addr;
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}
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static void break_helper(char *bp_type, char *arg, unsigned long vaddr)
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{
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unsigned long addr;
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if (arg)
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addr = lookup_addr(arg);
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else
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addr = vaddr;
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sprintf(scratch_buf, "%s,%lx,%i", bp_type, addr,
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BREAK_INSTR_SIZE);
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fill_get_buf(scratch_buf);
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}
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static void sw_break(char *arg)
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{
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2008-05-29 00:49:57 +07:00
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break_helper(force_hwbrks ? "Z1" : "Z0", arg, 0);
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2008-03-08 05:34:17 +07:00
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}
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static void sw_rem_break(char *arg)
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{
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2008-05-29 00:49:57 +07:00
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break_helper(force_hwbrks ? "z1" : "z0", arg, 0);
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2008-03-08 05:34:17 +07:00
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}
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static void hw_break(char *arg)
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{
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break_helper("Z1", arg, 0);
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}
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static void hw_rem_break(char *arg)
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{
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break_helper("z1", arg, 0);
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}
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static void hw_write_break(char *arg)
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{
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break_helper("Z2", arg, 0);
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}
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static void hw_rem_write_break(char *arg)
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{
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break_helper("z2", arg, 0);
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}
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static void hw_access_break(char *arg)
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{
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break_helper("Z4", arg, 0);
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}
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static void hw_rem_access_break(char *arg)
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{
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break_helper("z4", arg, 0);
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}
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static void hw_break_val_access(void)
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{
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hw_break_val2 = hw_break_val;
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}
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static void hw_break_val_write(void)
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{
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hw_break_val++;
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}
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|
2012-03-30 05:41:24 +07:00
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|
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static int get_thread_id_continue(char *put_str, char *arg)
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{
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char *ptr = &put_str[11];
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if (put_str[1] != 'T' || put_str[2] != '0')
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return 1;
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kgdb_hex2long(&ptr, &cont_thread_id);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-03-08 05:34:17 +07:00
|
|
|
static int check_and_rewind_pc(char *put_str, char *arg)
|
|
|
|
{
|
|
|
|
unsigned long addr = lookup_addr(arg);
|
2011-05-27 06:25:45 +07:00
|
|
|
unsigned long ip;
|
2008-03-08 05:34:17 +07:00
|
|
|
int offset = 0;
|
|
|
|
|
|
|
|
kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs,
|
|
|
|
NUMREGBYTES);
|
|
|
|
gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs);
|
2011-05-27 06:25:45 +07:00
|
|
|
ip = instruction_pointer(&kgdbts_regs);
|
|
|
|
v2printk("Stopped at IP: %lx\n", ip);
|
|
|
|
#ifdef GDB_ADJUSTS_BREAK_OFFSET
|
|
|
|
/* On some arches, a breakpoint stop requires it to be decremented */
|
|
|
|
if (addr + BREAK_INSTR_SIZE == ip)
|
|
|
|
offset = -BREAK_INSTR_SIZE;
|
2008-03-08 05:34:17 +07:00
|
|
|
#endif
|
2012-03-30 05:41:24 +07:00
|
|
|
|
|
|
|
if (arch_needs_sstep_emulation && sstep_addr &&
|
|
|
|
ip + offset == sstep_addr &&
|
|
|
|
((!strcmp(arg, "sys_open") || !strcmp(arg, "do_fork")))) {
|
|
|
|
/* This is special case for emulated single step */
|
|
|
|
v2printk("Emul: rewind hit single step bp\n");
|
|
|
|
restart_from_top_after_write = 1;
|
|
|
|
} else if (strcmp(arg, "silent") && ip + offset != addr) {
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: BP mismatch %lx expected %lx\n",
|
2011-05-27 06:25:45 +07:00
|
|
|
ip + offset, addr);
|
2008-03-08 05:34:17 +07:00
|
|
|
return 1;
|
|
|
|
}
|
2011-05-27 06:25:45 +07:00
|
|
|
/* Readjust the instruction pointer if needed */
|
2011-05-28 21:04:25 +07:00
|
|
|
ip += offset;
|
2012-03-30 05:41:24 +07:00
|
|
|
cont_addr = ip;
|
2011-05-28 21:04:25 +07:00
|
|
|
#ifdef GDB_ADJUSTS_BREAK_OFFSET
|
|
|
|
instruction_pointer_set(&kgdbts_regs, ip);
|
|
|
|
#endif
|
2008-03-08 05:34:17 +07:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int check_single_step(char *put_str, char *arg)
|
|
|
|
{
|
|
|
|
unsigned long addr = lookup_addr(arg);
|
2012-03-30 05:41:24 +07:00
|
|
|
static int matched_id;
|
|
|
|
|
2008-03-08 05:34:17 +07:00
|
|
|
/*
|
|
|
|
* From an arch indepent point of view the instruction pointer
|
|
|
|
* should be on a different instruction
|
|
|
|
*/
|
|
|
|
kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs,
|
|
|
|
NUMREGBYTES);
|
|
|
|
gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs);
|
|
|
|
v2printk("Singlestep stopped at IP: %lx\n",
|
|
|
|
instruction_pointer(&kgdbts_regs));
|
2012-03-30 05:41:24 +07:00
|
|
|
|
2012-03-30 05:41:24 +07:00
|
|
|
if (sstep_thread_id != cont_thread_id) {
|
2012-03-30 05:41:24 +07:00
|
|
|
/*
|
|
|
|
* Ensure we stopped in the same thread id as before, else the
|
|
|
|
* debugger should continue until the original thread that was
|
|
|
|
* single stepped is scheduled again, emulating gdb's behavior.
|
|
|
|
*/
|
|
|
|
v2printk("ThrID does not match: %lx\n", cont_thread_id);
|
2012-03-30 05:41:24 +07:00
|
|
|
if (arch_needs_sstep_emulation) {
|
|
|
|
if (matched_id &&
|
|
|
|
instruction_pointer(&kgdbts_regs) != addr)
|
|
|
|
goto continue_test;
|
|
|
|
matched_id++;
|
|
|
|
ts.idx -= 2;
|
|
|
|
sstep_state = 0;
|
|
|
|
return 0;
|
|
|
|
}
|
2012-03-30 05:41:24 +07:00
|
|
|
cont_instead_of_sstep = 1;
|
|
|
|
ts.idx -= 4;
|
|
|
|
return 0;
|
|
|
|
}
|
2012-03-30 05:41:24 +07:00
|
|
|
continue_test:
|
|
|
|
matched_id = 0;
|
2008-03-08 05:34:17 +07:00
|
|
|
if (instruction_pointer(&kgdbts_regs) == addr) {
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: SingleStep failed at %lx\n",
|
2008-03-08 05:34:17 +07:00
|
|
|
instruction_pointer(&kgdbts_regs));
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void write_regs(char *arg)
|
|
|
|
{
|
|
|
|
memset(scratch_buf, 0, sizeof(scratch_buf));
|
|
|
|
scratch_buf[0] = 'G';
|
|
|
|
pt_regs_to_gdb_regs(kgdbts_gdb_regs, &kgdbts_regs);
|
|
|
|
kgdb_mem2hex((char *)kgdbts_gdb_regs, &scratch_buf[1], NUMREGBYTES);
|
|
|
|
fill_get_buf(scratch_buf);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void skip_back_repeat_test(char *arg)
|
|
|
|
{
|
|
|
|
int go_back = simple_strtol(arg, NULL, 10);
|
|
|
|
|
|
|
|
repeat_test--;
|
2017-12-12 19:10:36 +07:00
|
|
|
if (repeat_test <= 0) {
|
2008-03-08 05:34:17 +07:00
|
|
|
ts.idx++;
|
2017-12-12 19:10:36 +07:00
|
|
|
} else {
|
|
|
|
if (repeat_test % 100 == 0)
|
|
|
|
v1printk("kgdbts:RUN ... %d remaining\n", repeat_test);
|
|
|
|
|
2008-03-08 05:34:17 +07:00
|
|
|
ts.idx -= go_back;
|
2017-12-12 19:10:36 +07:00
|
|
|
}
|
2008-03-08 05:34:17 +07:00
|
|
|
fill_get_buf(ts.tst[ts.idx].get);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int got_break(char *put_str, char *arg)
|
|
|
|
{
|
|
|
|
test_complete = 1;
|
|
|
|
if (!strncmp(put_str+1, arg, 2)) {
|
|
|
|
if (!strncmp(arg, "T0", 2))
|
|
|
|
test_complete = 2;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2012-03-30 05:41:24 +07:00
|
|
|
static void get_cont_catch(char *arg)
|
|
|
|
{
|
|
|
|
/* Always send detach because the test is completed at this point */
|
|
|
|
fill_get_buf("D");
|
|
|
|
}
|
|
|
|
|
|
|
|
static int put_cont_catch(char *put_str, char *arg)
|
|
|
|
{
|
|
|
|
/* This is at the end of the test and we catch any and all input */
|
|
|
|
v2printk("kgdbts: cleanup task: %lx\n", sstep_thread_id);
|
|
|
|
ts.idx--;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int emul_reset(char *put_str, char *arg)
|
|
|
|
{
|
|
|
|
if (strncmp(put_str, "$OK", 3))
|
|
|
|
return 1;
|
|
|
|
if (restart_from_top_after_write) {
|
|
|
|
restart_from_top_after_write = 0;
|
|
|
|
ts.idx = -1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-03-08 05:34:17 +07:00
|
|
|
static void emul_sstep_get(char *arg)
|
|
|
|
{
|
|
|
|
if (!arch_needs_sstep_emulation) {
|
2012-03-30 05:41:24 +07:00
|
|
|
if (cont_instead_of_sstep) {
|
|
|
|
cont_instead_of_sstep = 0;
|
|
|
|
fill_get_buf("c");
|
|
|
|
} else {
|
|
|
|
fill_get_buf(arg);
|
|
|
|
}
|
2008-03-08 05:34:17 +07:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
switch (sstep_state) {
|
|
|
|
case 0:
|
|
|
|
v2printk("Emulate single step\n");
|
|
|
|
/* Start by looking at the current PC */
|
|
|
|
fill_get_buf("g");
|
|
|
|
break;
|
|
|
|
case 1:
|
|
|
|
/* set breakpoint */
|
2008-04-25 04:57:23 +07:00
|
|
|
break_helper("Z0", NULL, sstep_addr);
|
2008-03-08 05:34:17 +07:00
|
|
|
break;
|
|
|
|
case 2:
|
|
|
|
/* Continue */
|
|
|
|
fill_get_buf("c");
|
|
|
|
break;
|
|
|
|
case 3:
|
|
|
|
/* Clear breakpoint */
|
2008-04-25 04:57:23 +07:00
|
|
|
break_helper("z0", NULL, sstep_addr);
|
2008-03-08 05:34:17 +07:00
|
|
|
break;
|
|
|
|
default:
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: ERROR failed sstep get emulation\n");
|
2008-03-08 05:34:17 +07:00
|
|
|
}
|
|
|
|
sstep_state++;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int emul_sstep_put(char *put_str, char *arg)
|
|
|
|
{
|
|
|
|
if (!arch_needs_sstep_emulation) {
|
2012-03-30 05:41:24 +07:00
|
|
|
char *ptr = &put_str[11];
|
|
|
|
if (put_str[1] != 'T' || put_str[2] != '0')
|
|
|
|
return 1;
|
|
|
|
kgdb_hex2long(&ptr, &sstep_thread_id);
|
|
|
|
return 0;
|
2008-03-08 05:34:17 +07:00
|
|
|
}
|
|
|
|
switch (sstep_state) {
|
|
|
|
case 1:
|
|
|
|
/* validate the "g" packet to get the IP */
|
|
|
|
kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs,
|
|
|
|
NUMREGBYTES);
|
|
|
|
gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs);
|
|
|
|
v2printk("Stopped at IP: %lx\n",
|
|
|
|
instruction_pointer(&kgdbts_regs));
|
|
|
|
/* Want to stop at IP + break instruction size by default */
|
2012-03-30 05:41:24 +07:00
|
|
|
sstep_addr = cont_addr + BREAK_INSTR_SIZE;
|
2008-03-08 05:34:17 +07:00
|
|
|
break;
|
|
|
|
case 2:
|
|
|
|
if (strncmp(put_str, "$OK", 3)) {
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: failed sstep break set\n");
|
2008-03-08 05:34:17 +07:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 3:
|
|
|
|
if (strncmp(put_str, "$T0", 3)) {
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: failed continue sstep\n");
|
2008-03-08 05:34:17 +07:00
|
|
|
return 1;
|
2012-03-30 05:41:24 +07:00
|
|
|
} else {
|
|
|
|
char *ptr = &put_str[11];
|
|
|
|
kgdb_hex2long(&ptr, &sstep_thread_id);
|
2008-03-08 05:34:17 +07:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 4:
|
|
|
|
if (strncmp(put_str, "$OK", 3)) {
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: failed sstep break unset\n");
|
2008-03-08 05:34:17 +07:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
/* Single step is complete so continue on! */
|
|
|
|
sstep_state = 0;
|
|
|
|
return 0;
|
|
|
|
default:
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: ERROR failed sstep put emulation\n");
|
2008-03-08 05:34:17 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Continue on the same test line until emulation is complete */
|
|
|
|
ts.idx--;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int final_ack_set(char *put_str, char *arg)
|
|
|
|
{
|
|
|
|
if (strncmp(put_str+1, arg, 2))
|
|
|
|
return 1;
|
|
|
|
final_ack = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Test to plant a breakpoint and detach, which should clear out the
|
|
|
|
* breakpoint and restore the original instruction.
|
|
|
|
*/
|
|
|
|
static struct test_struct plant_and_detach_test[] = {
|
|
|
|
{ "?", "S0*" }, /* Clear break points */
|
|
|
|
{ "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */
|
|
|
|
{ "D", "OK" }, /* Detach */
|
|
|
|
{ "", "" },
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Simple test to write in a software breakpoint, check for the
|
|
|
|
* correct stop location and detach.
|
|
|
|
*/
|
|
|
|
static struct test_struct sw_breakpoint_test[] = {
|
|
|
|
{ "?", "S0*" }, /* Clear break points */
|
|
|
|
{ "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */
|
|
|
|
{ "c", "T0*", }, /* Continue */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "g", "kgdbts_break_test", NULL, check_and_rewind_pc },
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "write", "OK", write_regs },
|
|
|
|
{ "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */
|
|
|
|
{ "D", "OK" }, /* Detach */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "D", "OK", NULL, got_break }, /* On success we made it here */
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "", "" },
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Test a known bad memory read location to test the fault handler and
|
|
|
|
* read bytes 1-8 at the bad address
|
|
|
|
*/
|
|
|
|
static struct test_struct bad_read_test[] = {
|
|
|
|
{ "?", "S0*" }, /* Clear break points */
|
|
|
|
{ "m0,1", "E*" }, /* read 1 byte at address 1 */
|
|
|
|
{ "m0,2", "E*" }, /* read 1 byte at address 2 */
|
|
|
|
{ "m0,3", "E*" }, /* read 1 byte at address 3 */
|
|
|
|
{ "m0,4", "E*" }, /* read 1 byte at address 4 */
|
|
|
|
{ "m0,5", "E*" }, /* read 1 byte at address 5 */
|
|
|
|
{ "m0,6", "E*" }, /* read 1 byte at address 6 */
|
|
|
|
{ "m0,7", "E*" }, /* read 1 byte at address 7 */
|
|
|
|
{ "m0,8", "E*" }, /* read 1 byte at address 8 */
|
|
|
|
{ "D", "OK" }, /* Detach which removes all breakpoints and continues */
|
|
|
|
{ "", "" },
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Test for hitting a breakpoint, remove it, single step, plant it
|
|
|
|
* again and detach.
|
|
|
|
*/
|
|
|
|
static struct test_struct singlestep_break_test[] = {
|
|
|
|
{ "?", "S0*" }, /* Clear break points */
|
|
|
|
{ "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */
|
2012-03-30 05:41:24 +07:00
|
|
|
{ "c", "T0*", NULL, get_thread_id_continue }, /* Continue */
|
|
|
|
{ "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "g", "kgdbts_break_test", NULL, check_and_rewind_pc },
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "write", "OK", write_regs }, /* Write registers */
|
|
|
|
{ "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "g", "kgdbts_break_test", NULL, check_single_step },
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */
|
|
|
|
{ "c", "T0*", }, /* Continue */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "g", "kgdbts_break_test", NULL, check_and_rewind_pc },
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "write", "OK", write_regs }, /* Write registers */
|
|
|
|
{ "D", "OK" }, /* Remove all breakpoints and continues */
|
|
|
|
{ "", "" },
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Test for hitting a breakpoint at do_fork for what ever the number
|
|
|
|
* of iterations required by the variable repeat_test.
|
|
|
|
*/
|
|
|
|
static struct test_struct do_fork_test[] = {
|
|
|
|
{ "?", "S0*" }, /* Clear break points */
|
|
|
|
{ "do_fork", "OK", sw_break, }, /* set sw breakpoint */
|
2012-03-30 05:41:24 +07:00
|
|
|
{ "c", "T0*", NULL, get_thread_id_continue }, /* Continue */
|
|
|
|
{ "do_fork", "OK", sw_rem_break }, /*remove breakpoint */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "g", "do_fork", NULL, check_and_rewind_pc }, /* check location */
|
2012-03-30 05:41:24 +07:00
|
|
|
{ "write", "OK", write_regs, emul_reset }, /* Write registers */
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "g", "do_fork", NULL, check_single_step },
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "do_fork", "OK", sw_break, }, /* set sw breakpoint */
|
|
|
|
{ "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "D", "OK", NULL, final_ack_set }, /* detach and unregister I/O */
|
2012-03-30 05:41:24 +07:00
|
|
|
{ "", "", get_cont_catch, put_cont_catch },
|
2008-03-08 05:34:17 +07:00
|
|
|
};
|
|
|
|
|
|
|
|
/* Test for hitting a breakpoint at sys_open for what ever the number
|
|
|
|
* of iterations required by the variable repeat_test.
|
|
|
|
*/
|
|
|
|
static struct test_struct sys_open_test[] = {
|
|
|
|
{ "?", "S0*" }, /* Clear break points */
|
|
|
|
{ "sys_open", "OK", sw_break, }, /* set sw breakpoint */
|
2012-03-30 05:41:24 +07:00
|
|
|
{ "c", "T0*", NULL, get_thread_id_continue }, /* Continue */
|
|
|
|
{ "sys_open", "OK", sw_rem_break }, /*remove breakpoint */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "g", "sys_open", NULL, check_and_rewind_pc }, /* check location */
|
2012-03-30 05:41:24 +07:00
|
|
|
{ "write", "OK", write_regs, emul_reset }, /* Write registers */
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "g", "sys_open", NULL, check_single_step },
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "sys_open", "OK", sw_break, }, /* set sw breakpoint */
|
|
|
|
{ "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "D", "OK", NULL, final_ack_set }, /* detach and unregister I/O */
|
2012-03-30 05:41:24 +07:00
|
|
|
{ "", "", get_cont_catch, put_cont_catch },
|
2008-03-08 05:34:17 +07:00
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Test for hitting a simple hw breakpoint
|
|
|
|
*/
|
|
|
|
static struct test_struct hw_breakpoint_test[] = {
|
|
|
|
{ "?", "S0*" }, /* Clear break points */
|
|
|
|
{ "kgdbts_break_test", "OK", hw_break, }, /* set hw breakpoint */
|
|
|
|
{ "c", "T0*", }, /* Continue */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "g", "kgdbts_break_test", NULL, check_and_rewind_pc },
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "write", "OK", write_regs },
|
|
|
|
{ "kgdbts_break_test", "OK", hw_rem_break }, /*remove breakpoint */
|
|
|
|
{ "D", "OK" }, /* Detach */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "D", "OK", NULL, got_break }, /* On success we made it here */
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "", "" },
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Test for hitting a hw write breakpoint
|
|
|
|
*/
|
|
|
|
static struct test_struct hw_write_break_test[] = {
|
|
|
|
{ "?", "S0*" }, /* Clear break points */
|
|
|
|
{ "hw_break_val", "OK", hw_write_break, }, /* set hw breakpoint */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "c", "T0*", NULL, got_break }, /* Continue */
|
|
|
|
{ "g", "silent", NULL, check_and_rewind_pc },
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "write", "OK", write_regs },
|
|
|
|
{ "hw_break_val", "OK", hw_rem_write_break }, /*remove breakpoint */
|
|
|
|
{ "D", "OK" }, /* Detach */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "D", "OK", NULL, got_break }, /* On success we made it here */
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "", "" },
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Test for hitting a hw access breakpoint
|
|
|
|
*/
|
|
|
|
static struct test_struct hw_access_break_test[] = {
|
|
|
|
{ "?", "S0*" }, /* Clear break points */
|
|
|
|
{ "hw_break_val", "OK", hw_access_break, }, /* set hw breakpoint */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "c", "T0*", NULL, got_break }, /* Continue */
|
|
|
|
{ "g", "silent", NULL, check_and_rewind_pc },
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "write", "OK", write_regs },
|
|
|
|
{ "hw_break_val", "OK", hw_rem_access_break }, /*remove breakpoint */
|
|
|
|
{ "D", "OK" }, /* Detach */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "D", "OK", NULL, got_break }, /* On success we made it here */
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "", "" },
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Test for hitting a hw access breakpoint
|
|
|
|
*/
|
|
|
|
static struct test_struct nmi_sleep_test[] = {
|
|
|
|
{ "?", "S0*" }, /* Clear break points */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "c", "T0*", NULL, got_break }, /* Continue */
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "D", "OK" }, /* Detach */
|
2008-04-25 04:57:23 +07:00
|
|
|
{ "D", "OK", NULL, got_break }, /* On success we made it here */
|
2008-03-08 05:34:17 +07:00
|
|
|
{ "", "" },
|
|
|
|
};
|
|
|
|
|
|
|
|
static void fill_get_buf(char *buf)
|
|
|
|
{
|
|
|
|
unsigned char checksum = 0;
|
|
|
|
int count = 0;
|
|
|
|
char ch;
|
|
|
|
|
|
|
|
strcpy(get_buf, "$");
|
|
|
|
strcat(get_buf, buf);
|
|
|
|
while ((ch = buf[count])) {
|
|
|
|
checksum += ch;
|
|
|
|
count++;
|
|
|
|
}
|
|
|
|
strcat(get_buf, "#");
|
2008-05-29 00:49:56 +07:00
|
|
|
get_buf[count + 2] = hex_asc_hi(checksum);
|
|
|
|
get_buf[count + 3] = hex_asc_lo(checksum);
|
2008-03-08 05:34:17 +07:00
|
|
|
get_buf[count + 4] = '\0';
|
|
|
|
v2printk("get%i: %s\n", ts.idx, get_buf);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int validate_simple_test(char *put_str)
|
|
|
|
{
|
|
|
|
char *chk_str;
|
|
|
|
|
|
|
|
if (ts.tst[ts.idx].put_handler)
|
|
|
|
return ts.tst[ts.idx].put_handler(put_str,
|
|
|
|
ts.tst[ts.idx].put);
|
|
|
|
|
|
|
|
chk_str = ts.tst[ts.idx].put;
|
|
|
|
if (*put_str == '$')
|
|
|
|
put_str++;
|
|
|
|
|
|
|
|
while (*chk_str != '\0' && *put_str != '\0') {
|
|
|
|
/* If someone does a * to match the rest of the string, allow
|
2011-03-31 08:57:33 +07:00
|
|
|
* it, or stop if the received string is complete.
|
2008-03-08 05:34:17 +07:00
|
|
|
*/
|
|
|
|
if (*put_str == '#' || *chk_str == '*')
|
|
|
|
return 0;
|
|
|
|
if (*put_str != *chk_str)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
chk_str++;
|
|
|
|
put_str++;
|
|
|
|
}
|
|
|
|
if (*chk_str == '\0' && (*put_str == '\0' || *put_str == '#'))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int run_simple_test(int is_get_char, int chr)
|
|
|
|
{
|
|
|
|
int ret = 0;
|
|
|
|
if (is_get_char) {
|
|
|
|
/* Send an ACK on the get if a prior put completed and set the
|
|
|
|
* send ack variable
|
|
|
|
*/
|
|
|
|
if (send_ack) {
|
|
|
|
send_ack = 0;
|
|
|
|
return '+';
|
|
|
|
}
|
|
|
|
/* On the first get char, fill the transmit buffer and then
|
|
|
|
* take from the get_string.
|
|
|
|
*/
|
|
|
|
if (get_buf_cnt == 0) {
|
|
|
|
if (ts.tst[ts.idx].get_handler)
|
|
|
|
ts.tst[ts.idx].get_handler(ts.tst[ts.idx].get);
|
|
|
|
else
|
|
|
|
fill_get_buf(ts.tst[ts.idx].get);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (get_buf[get_buf_cnt] == '\0') {
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: ERROR GET: EOB on '%s' at %i\n",
|
2008-03-08 05:34:17 +07:00
|
|
|
ts.name, ts.idx);
|
|
|
|
get_buf_cnt = 0;
|
|
|
|
fill_get_buf("D");
|
|
|
|
}
|
|
|
|
ret = get_buf[get_buf_cnt];
|
|
|
|
get_buf_cnt++;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* This callback is a put char which is when kgdb sends data to
|
|
|
|
* this I/O module.
|
|
|
|
*/
|
2012-03-30 05:41:24 +07:00
|
|
|
if (ts.tst[ts.idx].get[0] == '\0' && ts.tst[ts.idx].put[0] == '\0' &&
|
|
|
|
!ts.tst[ts.idx].get_handler) {
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: ERROR: beyond end of test on"
|
2008-03-08 05:34:17 +07:00
|
|
|
" '%s' line %i\n", ts.name, ts.idx);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (put_buf_cnt >= BUFMAX) {
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: ERROR: put buffer overflow on"
|
2008-03-08 05:34:17 +07:00
|
|
|
" '%s' line %i\n", ts.name, ts.idx);
|
|
|
|
put_buf_cnt = 0;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/* Ignore everything until the first valid packet start '$' */
|
|
|
|
if (put_buf_cnt == 0 && chr != '$')
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
put_buf[put_buf_cnt] = chr;
|
|
|
|
put_buf_cnt++;
|
|
|
|
|
|
|
|
/* End of packet == #XX so look for the '#' */
|
|
|
|
if (put_buf_cnt > 3 && put_buf[put_buf_cnt - 3] == '#') {
|
2009-12-11 21:43:15 +07:00
|
|
|
if (put_buf_cnt >= BUFMAX) {
|
|
|
|
eprintk("kgdbts: ERROR: put buffer overflow on"
|
|
|
|
" '%s' line %i\n", ts.name, ts.idx);
|
|
|
|
put_buf_cnt = 0;
|
|
|
|
return 0;
|
|
|
|
}
|
2008-03-08 05:34:17 +07:00
|
|
|
put_buf[put_buf_cnt] = '\0';
|
|
|
|
v2printk("put%i: %s\n", ts.idx, put_buf);
|
|
|
|
/* Trigger check here */
|
|
|
|
if (ts.validate_put && ts.validate_put(put_buf)) {
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: ERROR PUT: end of test "
|
2008-03-08 05:34:17 +07:00
|
|
|
"buffer on '%s' line %i expected %s got %s\n",
|
|
|
|
ts.name, ts.idx, ts.tst[ts.idx].put, put_buf);
|
|
|
|
}
|
|
|
|
ts.idx++;
|
|
|
|
put_buf_cnt = 0;
|
|
|
|
get_buf_cnt = 0;
|
|
|
|
send_ack = 1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void init_simple_test(void)
|
|
|
|
{
|
|
|
|
memset(&ts, 0, sizeof(ts));
|
|
|
|
ts.run_test = run_simple_test;
|
|
|
|
ts.validate_put = validate_simple_test;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void run_plant_and_detach_test(int is_early)
|
|
|
|
{
|
|
|
|
char before[BREAK_INSTR_SIZE];
|
|
|
|
char after[BREAK_INSTR_SIZE];
|
|
|
|
|
|
|
|
probe_kernel_read(before, (char *)kgdbts_break_test,
|
|
|
|
BREAK_INSTR_SIZE);
|
|
|
|
init_simple_test();
|
|
|
|
ts.tst = plant_and_detach_test;
|
|
|
|
ts.name = "plant_and_detach_test";
|
|
|
|
/* Activate test with initial breakpoint */
|
|
|
|
if (!is_early)
|
|
|
|
kgdb_breakpoint();
|
|
|
|
probe_kernel_read(after, (char *)kgdbts_break_test,
|
|
|
|
BREAK_INSTR_SIZE);
|
|
|
|
if (memcmp(before, after, BREAK_INSTR_SIZE)) {
|
|
|
|
printk(KERN_CRIT "kgdbts: ERROR kgdb corrupted memory\n");
|
|
|
|
panic("kgdb memory corruption");
|
|
|
|
}
|
|
|
|
|
|
|
|
/* complete the detach test */
|
|
|
|
if (!is_early)
|
|
|
|
kgdbts_break_test();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void run_breakpoint_test(int is_hw_breakpoint)
|
|
|
|
{
|
|
|
|
test_complete = 0;
|
|
|
|
init_simple_test();
|
|
|
|
if (is_hw_breakpoint) {
|
|
|
|
ts.tst = hw_breakpoint_test;
|
|
|
|
ts.name = "hw_breakpoint_test";
|
|
|
|
} else {
|
|
|
|
ts.tst = sw_breakpoint_test;
|
|
|
|
ts.name = "sw_breakpoint_test";
|
|
|
|
}
|
|
|
|
/* Activate test with initial breakpoint */
|
|
|
|
kgdb_breakpoint();
|
|
|
|
/* run code with the break point in it */
|
|
|
|
kgdbts_break_test();
|
|
|
|
kgdb_breakpoint();
|
|
|
|
|
|
|
|
if (test_complete)
|
|
|
|
return;
|
|
|
|
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: ERROR %s test failed\n", ts.name);
|
2008-05-29 00:49:57 +07:00
|
|
|
if (is_hw_breakpoint)
|
|
|
|
hwbreaks_ok = 0;
|
2008-03-08 05:34:17 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void run_hw_break_test(int is_write_test)
|
|
|
|
{
|
|
|
|
test_complete = 0;
|
|
|
|
init_simple_test();
|
|
|
|
if (is_write_test) {
|
|
|
|
ts.tst = hw_write_break_test;
|
|
|
|
ts.name = "hw_write_break_test";
|
|
|
|
} else {
|
|
|
|
ts.tst = hw_access_break_test;
|
|
|
|
ts.name = "hw_access_break_test";
|
|
|
|
}
|
|
|
|
/* Activate test with initial breakpoint */
|
|
|
|
kgdb_breakpoint();
|
|
|
|
hw_break_val_access();
|
|
|
|
if (is_write_test) {
|
2008-05-29 00:49:57 +07:00
|
|
|
if (test_complete == 2) {
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: ERROR %s broke on access\n",
|
2008-03-08 05:34:17 +07:00
|
|
|
ts.name);
|
2008-05-29 00:49:57 +07:00
|
|
|
hwbreaks_ok = 0;
|
|
|
|
}
|
2008-03-08 05:34:17 +07:00
|
|
|
hw_break_val_write();
|
|
|
|
}
|
|
|
|
kgdb_breakpoint();
|
|
|
|
|
|
|
|
if (test_complete == 1)
|
|
|
|
return;
|
|
|
|
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: ERROR %s test failed\n", ts.name);
|
2008-05-29 00:49:57 +07:00
|
|
|
hwbreaks_ok = 0;
|
2008-03-08 05:34:17 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void run_nmi_sleep_test(int nmi_sleep)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
init_simple_test();
|
|
|
|
ts.tst = nmi_sleep_test;
|
|
|
|
ts.name = "nmi_sleep_test";
|
|
|
|
/* Activate test with initial breakpoint */
|
|
|
|
kgdb_breakpoint();
|
|
|
|
local_irq_save(flags);
|
|
|
|
mdelay(nmi_sleep*1000);
|
|
|
|
touch_nmi_watchdog();
|
|
|
|
local_irq_restore(flags);
|
|
|
|
if (test_complete != 2)
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: ERROR nmi_test did not hit nmi\n");
|
2008-03-08 05:34:17 +07:00
|
|
|
kgdb_breakpoint();
|
|
|
|
if (test_complete == 1)
|
|
|
|
return;
|
|
|
|
|
2008-03-21 01:43:44 +07:00
|
|
|
eprintk("kgdbts: ERROR %s test failed\n", ts.name);
|
2008-03-08 05:34:17 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void run_bad_read_test(void)
|
|
|
|
{
|
|
|
|
init_simple_test();
|
|
|
|
ts.tst = bad_read_test;
|
|
|
|
ts.name = "bad_read_test";
|
|
|
|
/* Activate test with initial breakpoint */
|
|
|
|
kgdb_breakpoint();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void run_do_fork_test(void)
|
|
|
|
{
|
|
|
|
init_simple_test();
|
|
|
|
ts.tst = do_fork_test;
|
|
|
|
ts.name = "do_fork_test";
|
|
|
|
/* Activate test with initial breakpoint */
|
|
|
|
kgdb_breakpoint();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void run_sys_open_test(void)
|
|
|
|
{
|
|
|
|
init_simple_test();
|
|
|
|
ts.tst = sys_open_test;
|
|
|
|
ts.name = "sys_open_test";
|
|
|
|
/* Activate test with initial breakpoint */
|
|
|
|
kgdb_breakpoint();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void run_singlestep_break_test(void)
|
|
|
|
{
|
|
|
|
init_simple_test();
|
|
|
|
ts.tst = singlestep_break_test;
|
|
|
|
ts.name = "singlestep_breakpoint_test";
|
|
|
|
/* Activate test with initial breakpoint */
|
|
|
|
kgdb_breakpoint();
|
|
|
|
kgdbts_break_test();
|
|
|
|
kgdbts_break_test();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void kgdbts_run_tests(void)
|
|
|
|
{
|
|
|
|
char *ptr;
|
|
|
|
int fork_test = 0;
|
2008-04-25 04:57:23 +07:00
|
|
|
int do_sys_open_test = 0;
|
2008-04-25 04:57:23 +07:00
|
|
|
int sstep_test = 1000;
|
2008-03-08 05:34:17 +07:00
|
|
|
int nmi_sleep = 0;
|
2008-04-25 04:57:23 +07:00
|
|
|
int i;
|
2008-03-08 05:34:17 +07:00
|
|
|
|
2018-09-12 00:44:03 +07:00
|
|
|
verbose = 0;
|
|
|
|
if (strstr(config, "V1"))
|
|
|
|
verbose = 1;
|
|
|
|
if (strstr(config, "V2"))
|
|
|
|
verbose = 2;
|
|
|
|
|
2009-12-11 21:43:15 +07:00
|
|
|
ptr = strchr(config, 'F');
|
2008-03-08 05:34:17 +07:00
|
|
|
if (ptr)
|
2008-04-25 04:57:23 +07:00
|
|
|
fork_test = simple_strtol(ptr + 1, NULL, 10);
|
2009-12-11 21:43:15 +07:00
|
|
|
ptr = strchr(config, 'S');
|
2008-03-08 05:34:17 +07:00
|
|
|
if (ptr)
|
2008-04-25 04:57:23 +07:00
|
|
|
do_sys_open_test = simple_strtol(ptr + 1, NULL, 10);
|
2009-12-11 21:43:15 +07:00
|
|
|
ptr = strchr(config, 'N');
|
2008-03-08 05:34:17 +07:00
|
|
|
if (ptr)
|
|
|
|
nmi_sleep = simple_strtol(ptr+1, NULL, 10);
|
2009-12-11 21:43:15 +07:00
|
|
|
ptr = strchr(config, 'I');
|
2008-04-25 04:57:23 +07:00
|
|
|
if (ptr)
|
|
|
|
sstep_test = simple_strtol(ptr+1, NULL, 10);
|
2008-03-08 05:34:17 +07:00
|
|
|
|
2012-03-29 18:55:44 +07:00
|
|
|
/* All HW break point tests */
|
|
|
|
if (arch_kgdb_ops.flags & KGDB_HW_BREAKPOINT) {
|
|
|
|
hwbreaks_ok = 1;
|
|
|
|
v1printk("kgdbts:RUN hw breakpoint test\n");
|
|
|
|
run_breakpoint_test(1);
|
|
|
|
v1printk("kgdbts:RUN hw write breakpoint test\n");
|
|
|
|
run_hw_break_test(1);
|
|
|
|
v1printk("kgdbts:RUN access write breakpoint test\n");
|
|
|
|
run_hw_break_test(0);
|
|
|
|
}
|
|
|
|
|
2008-03-08 05:34:17 +07:00
|
|
|
/* required internal KGDB tests */
|
|
|
|
v1printk("kgdbts:RUN plant and detach test\n");
|
|
|
|
run_plant_and_detach_test(0);
|
|
|
|
v1printk("kgdbts:RUN sw breakpoint test\n");
|
|
|
|
run_breakpoint_test(0);
|
|
|
|
v1printk("kgdbts:RUN bad memory access test\n");
|
|
|
|
run_bad_read_test();
|
2008-04-25 04:57:23 +07:00
|
|
|
v1printk("kgdbts:RUN singlestep test %i iterations\n", sstep_test);
|
|
|
|
for (i = 0; i < sstep_test; i++) {
|
|
|
|
run_singlestep_break_test();
|
|
|
|
if (i % 100 == 0)
|
|
|
|
v1printk("kgdbts:RUN singlestep [%i/%i]\n",
|
|
|
|
i, sstep_test);
|
|
|
|
}
|
2008-03-08 05:34:17 +07:00
|
|
|
|
|
|
|
/* ===Optional tests=== */
|
|
|
|
|
|
|
|
if (nmi_sleep) {
|
|
|
|
v1printk("kgdbts:RUN NMI sleep %i seconds test\n", nmi_sleep);
|
|
|
|
run_nmi_sleep_test(nmi_sleep);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If the do_fork test is run it will be the last test that is
|
|
|
|
* executed because a kernel thread will be spawned at the very
|
|
|
|
* end to unregister the debug hooks.
|
|
|
|
*/
|
|
|
|
if (fork_test) {
|
|
|
|
repeat_test = fork_test;
|
|
|
|
printk(KERN_INFO "kgdbts:RUN do_fork for %i breakpoints\n",
|
|
|
|
repeat_test);
|
2008-04-25 04:57:23 +07:00
|
|
|
kthread_run(kgdbts_unreg_thread, NULL, "kgdbts_unreg");
|
2008-03-08 05:34:17 +07:00
|
|
|
run_do_fork_test();
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If the sys_open test is run it will be the last test that is
|
|
|
|
* executed because a kernel thread will be spawned at the very
|
|
|
|
* end to unregister the debug hooks.
|
|
|
|
*/
|
2008-04-25 04:57:23 +07:00
|
|
|
if (do_sys_open_test) {
|
|
|
|
repeat_test = do_sys_open_test;
|
2008-03-08 05:34:17 +07:00
|
|
|
printk(KERN_INFO "kgdbts:RUN sys_open for %i breakpoints\n",
|
|
|
|
repeat_test);
|
2008-04-25 04:57:23 +07:00
|
|
|
kthread_run(kgdbts_unreg_thread, NULL, "kgdbts_unreg");
|
2008-03-08 05:34:17 +07:00
|
|
|
run_sys_open_test();
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
/* Shutdown and unregister */
|
|
|
|
kgdb_unregister_io_module(&kgdbts_io_ops);
|
|
|
|
configured = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int kgdbts_option_setup(char *opt)
|
|
|
|
{
|
2010-03-15 19:28:00 +07:00
|
|
|
if (strlen(opt) >= MAX_CONFIG_LEN) {
|
2008-03-08 05:34:17 +07:00
|
|
|
printk(KERN_ERR "kgdbts: config string too long\n");
|
|
|
|
return -ENOSPC;
|
|
|
|
}
|
|
|
|
strcpy(config, opt);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
__setup("kgdbts=", kgdbts_option_setup);
|
|
|
|
|
|
|
|
static int configure_kgdbts(void)
|
|
|
|
{
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
if (!strlen(config) || isspace(config[0]))
|
|
|
|
goto noconfig;
|
|
|
|
|
|
|
|
final_ack = 0;
|
|
|
|
run_plant_and_detach_test(1);
|
|
|
|
|
|
|
|
err = kgdb_register_io_module(&kgdbts_io_ops);
|
|
|
|
if (err) {
|
|
|
|
configured = 0;
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
configured = 1;
|
|
|
|
kgdbts_run_tests();
|
|
|
|
|
|
|
|
return err;
|
|
|
|
|
|
|
|
noconfig:
|
|
|
|
config[0] = 0;
|
|
|
|
configured = 0;
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __init init_kgdbts(void)
|
|
|
|
{
|
|
|
|
/* Already configured? */
|
|
|
|
if (configured == 1)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return configure_kgdbts();
|
|
|
|
}
|
2015-08-09 03:35:05 +07:00
|
|
|
device_initcall(init_kgdbts);
|
2008-03-08 05:34:17 +07:00
|
|
|
|
|
|
|
static int kgdbts_get_char(void)
|
|
|
|
{
|
|
|
|
int val = 0;
|
|
|
|
|
|
|
|
if (ts.run_test)
|
|
|
|
val = ts.run_test(1, 0);
|
|
|
|
|
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void kgdbts_put_char(u8 chr)
|
|
|
|
{
|
|
|
|
if (ts.run_test)
|
|
|
|
ts.run_test(0, chr);
|
|
|
|
}
|
|
|
|
|
treewide: Fix function prototypes for module_param_call()
Several function prototypes for the set/get functions defined by
module_param_call() have a slightly wrong argument types. This fixes
those in an effort to clean up the calls when running under type-enforced
compiler instrumentation for CFI. This is the result of running the
following semantic patch:
@match_module_param_call_function@
declarer name module_param_call;
identifier _name, _set_func, _get_func;
expression _arg, _mode;
@@
module_param_call(_name, _set_func, _get_func, _arg, _mode);
@fix_set_prototype
depends on match_module_param_call_function@
identifier match_module_param_call_function._set_func;
identifier _val, _param;
type _val_type, _param_type;
@@
int _set_func(
-_val_type _val
+const char * _val
,
-_param_type _param
+const struct kernel_param * _param
) { ... }
@fix_get_prototype
depends on match_module_param_call_function@
identifier match_module_param_call_function._get_func;
identifier _val, _param;
type _val_type, _param_type;
@@
int _get_func(
-_val_type _val
+char * _val
,
-_param_type _param
+const struct kernel_param * _param
) { ... }
Two additional by-hand changes are included for places where the above
Coccinelle script didn't notice them:
drivers/platform/x86/thinkpad_acpi.c
fs/lockd/svc.c
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
2017-10-18 09:04:42 +07:00
|
|
|
static int param_set_kgdbts_var(const char *kmessage,
|
|
|
|
const struct kernel_param *kp)
|
2008-03-08 05:34:17 +07:00
|
|
|
{
|
|
|
|
int len = strlen(kmessage);
|
|
|
|
|
|
|
|
if (len >= MAX_CONFIG_LEN) {
|
|
|
|
printk(KERN_ERR "kgdbts: config string too long\n");
|
|
|
|
return -ENOSPC;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Only copy in the string if the init function has not run yet */
|
|
|
|
if (configured < 0) {
|
|
|
|
strcpy(config, kmessage);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-08-31 09:06:00 +07:00
|
|
|
if (configured == 1) {
|
|
|
|
printk(KERN_ERR "kgdbts: ERROR: Already configured and running.\n");
|
2008-03-08 05:34:17 +07:00
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
|
|
|
|
strcpy(config, kmessage);
|
|
|
|
/* Chop out \n char as a result of echo */
|
|
|
|
if (config[len - 1] == '\n')
|
|
|
|
config[len - 1] = '\0';
|
|
|
|
|
|
|
|
/* Go and configure with the new params. */
|
|
|
|
return configure_kgdbts();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void kgdbts_pre_exp_handler(void)
|
|
|
|
{
|
|
|
|
/* Increment the module count when the debugger is active */
|
|
|
|
if (!kgdb_connected)
|
|
|
|
try_module_get(THIS_MODULE);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void kgdbts_post_exp_handler(void)
|
|
|
|
{
|
|
|
|
/* decrement the module count when the debugger detaches */
|
|
|
|
if (!kgdb_connected)
|
|
|
|
module_put(THIS_MODULE);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct kgdb_io kgdbts_io_ops = {
|
|
|
|
.name = "kgdbts",
|
|
|
|
.read_char = kgdbts_get_char,
|
|
|
|
.write_char = kgdbts_put_char,
|
|
|
|
.pre_exception = kgdbts_pre_exp_handler,
|
|
|
|
.post_exception = kgdbts_post_exp_handler,
|
|
|
|
};
|
|
|
|
|
2015-08-09 03:35:05 +07:00
|
|
|
/*
|
|
|
|
* not really modular, but the easiest way to keep compat with existing
|
|
|
|
* bootargs behaviour is to continue using module_param here.
|
|
|
|
*/
|
2008-03-08 05:34:17 +07:00
|
|
|
module_param_call(kgdbts, param_set_kgdbts_var, param_get_string, &kps, 0644);
|
|
|
|
MODULE_PARM_DESC(kgdbts, "<A|V1|V2>[F#|S#][N#]");
|