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decode fcntl and mmap arguments.

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This commit is contained in:
Alfred Perlstein 2004-03-23 09:04:06 +00:00
parent ed0302e6a7
commit 894b8f7afb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=127328
3 changed files with 66 additions and 2 deletions
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2
usr.bin/truss/Makefile
View file

@ -1,5 +1,7 @@
# $FreeBSD$
WARNS?= 2
NO_WERROR= yes
PROG= truss
SRCS= main.c setup.c syscalls.c syscalls.h ioctl.c ${MACHINE_ARCH}-fbsd.c
.if ${MACHINE_ARCH} == "i386"

2
usr.bin/truss/syscall.h
View file

@ -22,7 +22,7 @@
*/
enum Argtype { None = 1, Hex, Octal, Int, String, Ptr, Stat, Ioctl, Quad,
Signal, Sockaddr, StringArray };
Signal, Sockaddr, StringArray, Fcntl, Mprot, Mmapflags };
#define ARG_MASK 0xff
#define OUT 0x100

64
usr.bin/truss/syscalls.c
View file

@ -39,6 +39,7 @@ static const char rcsid[] =
* arguments.
*/
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
@ -48,6 +49,7 @@ static const char rcsid[] =
#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
@ -64,12 +66,14 @@ static const char rcsid[] =
*/
struct syscall syscalls[] = {
{ "fcntl", 1, 3,
{ { Int, 0 } , { Fcntl, 1 }, { Hex, 2 }}},
{ "readlink", 1, 3,
{ { String, 0 } , { String | OUT, 1 }, { Int, 2 }}},
{ "lseek", 2, 3,
{ { Int, 0 }, {Quad, 2 }, { Int, 4 }}},
{ "mmap", 2, 6,
{ { Hex, 0 }, {Int, 1}, {Hex, 2}, {Hex, 3}, {Int, 4}, {Quad, 6}}},
{ { Ptr, 0 }, {Int, 1}, {Mprot, 2}, {Mmapflags, 3}, {Int, 4}, {Quad, 6}}},
{ "open", 1, 3,
{ { String | IN, 0} , { Hex, 1}, {Octal, 2}}},
{ "linux_open", 1, 3,
@ -243,6 +247,18 @@ make_quad(unsigned long p1, unsigned long p2) {
return t.ll;
}
/*
* Remove a trailing '|' in a string, useful for fixup after decoding
* a "flags" argument.
*/
void
remove_trailing_or(char *str)
{
if (str != NULL && (str = rindex(str, '|')) != NULL && str[1] == '\0')
*str = '\0';
}
/*
* print_arg
@ -345,6 +361,52 @@ print_arg(int fd, struct syscall_args *sc, unsigned long *args) {
asprintf(&tmp, "%ld", sig);
}
break;
case Fcntl:
{
switch (args[sc->offset]) {
#define S(a) case a: tmp = strdup(#a); break;
S(F_DUPFD);
S(F_GETFD);
S(F_SETFD);
S(F_GETFL);
S(F_SETFL);
S(F_GETOWN);
S(F_SETOWN);
S(F_GETLK);
S(F_SETLK);
S(F_SETLKW);
#undef S
}
if (tmp == NULL)
asprintf(&tmp, "0x%lx", args[sc->offset]);
}
break;
case Mprot:
{
#define S(a) ((args[sc->offset] & a) ? #a "|" : "")
asprintf(&tmp, "(0x%lx)%s%s%s%s", args[sc->offset],
S(PROT_NONE), S(PROT_READ), S(PROT_WRITE), S(PROT_EXEC));
#undef S
remove_trailing_or(tmp);
}
break;
case Mmapflags:
{
#define S(a) ((args[sc->offset] & a) ? #a "|" : "")
asprintf(&tmp, "(0x%lx)%s%s%s%s%s%s%s%s", args[sc->offset],
S(MAP_ANON), S(MAP_FIXED), S(MAP_HASSEMAPHORE),
S(MAP_NOCORE), S(MAP_NOSYNC), S(MAP_PRIVATE),
S(MAP_SHARED), S(MAP_STACK));
#undef S
remove_trailing_or(tmp);
}
break;
case Sockaddr:
{
struct sockaddr_storage ss;