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Enable the ioctl's.

This commit is contained in:
ragge 2003-05-01 20:46:20 +00:00
parent c1e26c1b48
commit b16f870314
2 changed files with 43 additions and 24 deletions
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38
sys/kern/kern_ksyms.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: kern_ksyms.c,v 1.4 2003/04/26 10:24:58 ragge Exp $ */
/* $NetBSD: kern_ksyms.c,v 1.5 2003/05/01 20:46:20 ragge Exp $ */
/*
* Copyright (c) 2001, 2003 Anders Magnusson (ragge@ludd.luth.se).
* All rights reserved.
@ -81,6 +81,7 @@ static int ksymsinited = 0;
static void ksyms_hdr_init(caddr_t hdraddr);
static void ksyms_sizes_calc(void);
static int ksyms_isopen;
static int ksyms_maxlen;
#endif
#ifdef KSYMS_DEBUG
@ -189,8 +190,14 @@ addsymtab(char *name, Elf_Ehdr *ehdr, struct symtab *tab)
/* Change all symbols to be absolute references */
sym = (Elf_Sym *)tab->sd_symstart;
for (i = 0; i < tab->sd_symsize/sizeof(Elf_Sym); i++)
for (i = 0; i < tab->sd_symsize/sizeof(Elf_Sym); i++) {
sym[i].st_shndx = SHN_ABS;
if (sym[i].st_name == 0)
continue;
j = strlen(sym[i].st_name + tab->sd_strstart) + 1;
if (j > ksyms_maxlen)
ksyms_maxlen = j;
}
CIRCLEQ_INSERT_HEAD(&symtab_queue, tab, sd_queue);
}
@ -392,14 +399,16 @@ addsym(Elf_Sym *sym, char *name)
printf("addsym: name %s val %lx\n", name, (long)sym->st_value);
#endif
if (cursyms == NSAVEDSYMS ||
((len = strlen(name)) + curnamep + 1) > SZSYMNAMES) {
((len = strlen(name) + 1) + curnamep) > SZSYMNAMES) {
printf("addsym: too many sumbols, skipping '%s'\n", name);
return;
}
strcpy(&symnames[curnamep], name);
savedsyms[cursyms] = *sym;
symnmoff[cursyms] = savedsyms[cursyms].st_name = curnamep;
curnamep += (len + 1);
curnamep += len;
if (len > ksyms_maxlen)
ksyms_maxlen = len;
cursyms++;
}
/*
@ -469,6 +478,7 @@ ksyms_addsymtab(char *mod, void *symstart, vsize_t symsize,
/* Ok, save this symbol */
addsym(&sym[i], strstart + sym[i].st_name);
}
sym = malloc(sizeof(Elf_Sym)*cursyms, M_DEVBUF, M_WAITOK);
str = malloc(curnamep, M_DEVBUF, M_WAITOK);
memcpy(sym, savedsyms, sizeof(Elf_Sym)*cursyms);
@ -771,12 +781,15 @@ ksymswrite(dev_t dev, struct uio *uio, int ioflag)
int
ksymsioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct proc *p)
{
#ifdef notyet
struct ksyms_gsymbol *kg = (struct ksyms_gsymbol *)data;
struct symtab *st;
Elf_Sym *sym;
unsigned long val;
int error = 0;
char *str;
if (cmd == KIOCGVALUE || cmd == KIOCGSYMBOL)
str = malloc(ksyms_maxlen, M_DEVBUF, M_WAITOK);
switch (cmd) {
case KIOCGVALUE:
@ -784,9 +797,9 @@ ksymsioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct proc *p)
* Use the in-kernel symbol lookup code for fast
* retreival of a value.
*/
if (error = copyinstr(kg->kg_name, symnm, maxsymnmsz, NULL))
if ((error = copyinstr(kg->kg_name, str, ksyms_maxlen, NULL)))
break;
if (error = ksyms_getval(NULL, symnm, &val, KSYMS_EXTERN))
if ((error = ksyms_getval(NULL, str, &val, KSYMS_EXTERN)))
break;
error = copyout(&val, kg->kg_value, sizeof(long));
break;
@ -796,10 +809,10 @@ ksymsioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct proc *p)
* Use the in-kernel symbol lookup code for fast
* retreival of a symbol.
*/
if (error = copyinstr(kg->kg_name, symnm, maxsymnmsz, NULL))
if ((error = copyinstr(kg->kg_name, str, ksyms_maxlen, NULL)))
break;
CIRCLEQ_FOREACH(st, &symtab_queue, sd_queue) {
if ((sym = findsym(symnm, st)) == NULL)
if ((sym = findsym(str, st)) == NULL)
continue;
/* Skip if bad binding */
@ -826,7 +839,10 @@ ksymsioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct proc *p)
error = ENOTTY;
break;
}
#endif
return ENOTTY;
if (cmd == KIOCGVALUE || cmd == KIOCGSYMBOL)
free(str, M_DEVBUF);
return error;
}
#endif

29
sys/sys/ksyms.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: ksyms.h,v 1.3 2003/04/26 10:24:59 ragge Exp $ */
/* $NetBSD: ksyms.h,v 1.4 2003/05/01 20:46:20 ragge Exp $ */
/*
* Copyright (c) 2001, 2003 Anders Magnusson (ragge@ludd.luth.se).
* All rights reserved.
@ -26,24 +26,16 @@
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Definitions used in ksyms_getname() and ksyms_getval().
*/
#define KSYMS_CLOSEST 0001 /* Nearest lower match */
#define KSYMS_EXACT 0002 /* Only exact match allowed */
#define KSYMS_EXTERN 0000 /* Only external symbols (pseudo) */
#define KSYMS_PROC 0100 /* Procedures only */
#define KSYMS_ANY 0200 /* Also local symbols (DDB use only) */
#ifndef _SYS_KSYMS_H_
#define _SYS_KSYMS_H_
#ifdef notyet
/*
* Do a lookup of a symbol using the in-kernel lookup algorithm.
*/
struct ksyms_gsymbol {
char *kg_name;
union {
Elf_Sym *ku_sym;
void *ku_sym; /* Normally Elf_Sym */
unsigned long *ku_value;
} _un;
#define kg_sym _un.ku_sym
@ -53,7 +45,16 @@ struct ksyms_gsymbol {
#define KIOCGSYMBOL _IOW('l', 1, struct ksyms_gsymbol)
#define KIOCGVALUE _IOW('l', 2, struct ksyms_gsymbol)
#define KIOCGSIZE _IOR('l', 3, int)
#endif
#ifdef _KERNEL
/*
* Definitions used in ksyms_getname() and ksyms_getval().
*/
#define KSYMS_CLOSEST 0001 /* Nearest lower match */
#define KSYMS_EXACT 0002 /* Only exact match allowed */
#define KSYMS_EXTERN 0000 /* Only external symbols (pseudo) */
#define KSYMS_PROC 0100 /* Procedures only */
#define KSYMS_ANY 0200 /* Also local symbols (DDB use only) */
/*
* Prototypes
@ -66,3 +67,5 @@ void ksyms_init(int, void *, void *);
#ifdef DDB
int ksyms_sift(char *mod, char *sym, int mode);
#endif
#endif /* _KERNEL */
#endif /* _SYS_KSYMS_H_ */