NAME
sys - system data
SYNOPSIS
sys [-c [name|number]]
DESCRIPTION
This command displays system-specific data. If no arguments are entered,
the same system data shown during crash invocation is shown.
-c [name|number] If no name or number argument is entered, dump all
sys_call_table entries. If a name string is entered,
search the table for all entries containing the string.
If a number is entered, the table entry associated with
that number is displayed. If the current output radix
has been set to 16, the system call numbers will be
displayed in hexadecimal.
-panic Panic a live system. Requires write permission to
/dev/mem. Results in the crash context causing an
"Attempted to kill the idle task!" panic. (The dump
will indicate that the crash context has a PID of 0).
EXAMPLES
Display essential system information:
crash> sys
KERNEL: vmlinux.4
DUMPFILE: lcore.cr.4
CPUS: 4
DATE: Mon Oct 11 18:48:55 1999
UPTIME: 10 days, 14:14:39
LOAD AVERAGE: 0.74, 0.23, 0.08
TASKS: 77
NODENAME: test.mclinux.com
RELEASE: 2.2.5-15smp
VERSION: #24 SMP Mon Oct 11 17:41:40 CDT 1999
MACHINE: i686 (500 MHz)
MEMORY: 1 GB
Dump the system call table:
crash> sys -c
NUM SYSTEM CALL FILE AND LINE NUMBER
0 sys_ni_syscall ../kernel/sys.c: 48
1 sys_exit ../kernel/exit.c: 404
2 sys_fork ../arch/i386/kernel/process.c: 771
3 sys_read ../fs/read_write.c: 117
4 sys_write ../fs/read_write.c: 146
5 sys_open ../fs/open.c: 754
6 sys_close ../fs/open.c: 839
7 sys_waitpid ../kernel/exit.c: 503
8 sys_creat ../fs/open.c: 789
9 sys_link ../fs/namei.c: 1213
10 sys_unlink ../fs/namei.c: 1074
11 sys_execve ../arch/i386/kernel/process.c: 806
...
Find the system call number of the select system call:
crash> sys -c select
NUM SYSTEM CALL FILE AND LINE NUMBER
65 sys_select ../fs/select.c: 259
If the current output radix has been set to 16, the system call numbers
will be displayed in hexadecimal.
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