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Banish hard-coded KERNBASE references from savecore. Dynamically

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adjust to whatever kernbase is in the kernel that we are dumping.
This commit is contained in:
Peter Wemm 2001-08-24 09:26:17 +00:00
parent fd131b1483
commit 241ca2287a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=82265
1 changed files with 15 additions and 1 deletions
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16
sbin/savecore/savecore.c
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@ -70,7 +70,7 @@ static const char rcsid[] =
#endif
#ifdef __i386__
#define ok(number) ((number) - KERNBASE)
#define ok(number) ((number) - kernbase)
#endif
struct nlist current_nl[] = { /* Namelist for currently running system. */
@ -86,6 +86,8 @@ struct nlist current_nl[] = { /* Namelist for currently running system. */
{ "_panicstr" },
#define X_DUMPMAG 5
{ "_dumpmag" },
#define X_KERNBASE 6
{ "_kernbase" },
{ "" },
};
int cursyms[] = { X_DUMPLO, X_VERSION, X_DUMPMAG, -1 };
@ -98,6 +100,7 @@ struct nlist dump_nl[] = { /* Name list for dumped system. */
{ "_version" },
{ "_panicstr" },
{ "_dumpmag" },
{ "_kernbase" },
{ "" },
};
@ -118,6 +121,10 @@ char panic_mesg[1024]; /* panic message */
int panicstr; /* flag: dump was caused by panic */
char vers[1024]; /* version of kernel that crashed */
#ifdef __i386__
u_long kernbase; /* offset of kvm to core file */
#endif
int clear, compress, force, verbose; /* flags */
int keep; /* keep dump on device */
@ -251,6 +258,13 @@ kmem_setup()
exit(1);
}
#ifdef __i386__
if (dump_nl[X_KERNBASE].n_value != 0)
kernbase = dump_nl[X_KERNBASE].n_value;
else
kernbase = KERNBASE;
#endif
len = sizeof dumpdev;
if (sysctlbyname("kern.dumpdev", &dumpdev, &len, NULL, 0) == -1) {
syslog(LOG_ERR, "sysctl: kern.dumpdev: %m");