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- Decode the arguments for several signal-related system calls: sigpending,

Browse Source 
sigqueue, sigreturn, sigsuspend, sigtimedwait, sigwait, sigwaitinfo, and
  thr_kill.
- Print signal sets as a structure (with {}'s) and in particular use this to
  differentiate empty sets from a NULL pointer.
- Decode arguments for some other system calls: issetugid, pipe2, sysarch
  (operations are only decoded for amd64 and i386), and thr_self.
This commit is contained in:
jhb 2015-08-17 17:52:28 +00:00
parent 2cc6e1e95a
commit 5c8f8904c2
2 changed files with 51 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
usr.bin/truss/syscall.h
View File

@ -41,7 +41,8 @@ enum Argtype { None = 1, Hex, Octal, Int, LongHex, Name, Ptr, Stat, Ioctl, Quad,
Sigset, Sigprocmask, Kevent, Sockdomain, Socktype, Open,
Fcntlflag, Rusage, BinString, Shutdown, Resource, Rlimit, Timeval2,
Pathconf, Rforkflags, ExitStatus, Waitoptions, Idtype, Procctl,
LinuxSockArgs, Umtxop, Atfd, Atflags, Timespec2, Accessmode };
LinuxSockArgs, Umtxop, Atfd, Atflags, Timespec2, Accessmode, Long,
Sysarch };
#define ARG_MASK 0xff
#define OUT 0x100

55
usr.bin/truss/syscalls.c
View File

@ -56,6 +56,7 @@ static const char rcsid[] =
#include <sys/event.h>
#include <sys/stat.h>
#include <sys/resource.h>
#include <machine/sysarch.h>
#include <ctype.h>
#include <err.h>
@ -113,6 +114,7 @@ static struct syscall syscalls[] = {
{ .name = "getsid", .ret_type = 1, .nargs = 1,
.args = { { Int, 0 } } },
{ .name = "getuid", .ret_type = 1, .nargs = 0 },
{ .name = "issetugid", .ret_type = 1, .nargs = 0 },
{ .name = "readlink", .ret_type = 1, .nargs = 3,
.args = { { Name, 0 }, { Readlinkres | OUT, 1 }, { Int, 2 } } },
{ .name = "readlinkat", .ret_type = 1, .nargs = 4,
@ -280,8 +282,22 @@ static struct syscall syscalls[] = {
{ .name = "kevent", .ret_type = 0, .nargs = 6,
.args = { { Int, 0 }, { Kevent, 1 }, { Int, 2 }, { Kevent | OUT, 3 },
{ Int, 4 }, { Timespec, 5 } } },
{ .name = "sigpending", .ret_type = 0, .nargs = 1,
.args = { { Sigset | OUT, 0 } } },
{ .name = "sigprocmask", .ret_type = 0, .nargs = 3,
.args = { { Sigprocmask, 0 }, { Sigset, 1 }, { Sigset | OUT, 2 } } },
{ .name = "sigqueue", .ret_type = 0, .nargs = 3,
.args = { { Int, 0 }, { Signal, 1 }, { LongHex, 2 } } },
{ .name = "sigreturn", .ret_type = 0, .nargs = 1,
.args = { { Ptr, 0 } } },
{ .name = "sigsuspend", .ret_type = 0, .nargs = 1,
.args = { { Sigset | IN, 0 } } },
{ .name = "sigtimedwait", .ret_type = 1, .nargs = 3,
.args = { { Sigset | IN, 0 }, { Ptr, 1 }, { Timespec | IN, 2 } } },
{ .name = "sigwait", .ret_type = 1, .nargs = 2,
.args = { { Sigset | IN, 0 }, { Ptr, 1 } } },
{ .name = "sigwaitinfo", .ret_type = 1, .nargs = 2,
.args = { { Sigset | IN, 0 }, { Ptr, 1 } } },
{ .name = "unmount", .ret_type = 1, .nargs = 2,
.args = { { Name, 0 }, { Int, 1 } } },
{ .name = "socket", .ret_type = 1, .nargs = 3,
@ -317,6 +333,8 @@ static struct syscall syscalls[] = {
.args = { { Name | IN, 0 }, { Pathconf, 1 } } },
{ .name = "pipe", .ret_type = 1, .nargs = 1,
.args = { { Ptr, 0 } } },
{ .name = "pipe2", .ret_type = 1, .nargs = 2,
.args = { { Ptr, 0 }, { Open, 1 } } },
{ .name = "truncate", .ret_type = 1, .nargs = 3,
.args = { { Name | IN, 0 }, { Int | IN, 1 }, { Quad | IN, 2 } } },
{ .name = "ftruncate", .ret_type = 1, .nargs = 3,
@ -345,9 +363,15 @@ static struct syscall syscalls[] = {
{ Waitoptions, 3 }, { Rusage | OUT, 4 }, { Ptr, 5 } } },
{ .name = "procctl", .ret_type = 1, .nargs = 4,
.args = { { Idtype, 0 }, { Int, 1 }, { Procctl, 2 }, { Ptr, 3 } } },
{ .name = "sysarch", .ret_type = 1, .nargs = 2,
.args = { { Sysarch, 0 }, { Ptr, 1 } } },
{ .name = "_umtx_op", .ret_type = 1, .nargs = 5,
.args = { { Ptr, 0 }, { Umtxop, 1 }, { LongHex, 2 }, { Ptr, 3 },
{ Ptr, 4 } } },
{ .name = "thr_kill", .ret_type = 0, .nargs = 2,
.args = { { Long, 0 }, { Signal, 1 } } },
{ .name = "thr_self", .ret_type = 0, .nargs = 1,
.args = { { Ptr, 0 } } },
{ .name = 0 },
};
@ -511,6 +535,16 @@ static struct xlat access_modes[] = {
X(R_OK) X(W_OK) X(X_OK) XEND
};
static struct xlat sysarch_ops[] = {
#if defined(__i386__) || defined(__amd64__)
X(I386_GET_LDT) X(I386_SET_LDT) X(I386_GET_IOPERM) X(I386_SET_IOPERM)
X(I386_VM86) X(I386_GET_FSBASE) X(I386_SET_FSBASE) X(I386_GET_GSBASE)
X(I386_SET_GSBASE) X(I386_GET_XFPUSTATE) X(AMD64_GET_FSBASE)
X(AMD64_SET_FSBASE) X(AMD64_GET_GSBASE) X(AMD64_SET_GSBASE)
X(AMD64_GET_XFPUSTATE)
#endif
XEND
};
#undef X
#undef XEND
@ -721,7 +755,10 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval,
break;
case LongHex:
asprintf(&tmp, "0x%lx", args[sc->offset]);
break;
break;
case Long:
asprintf(&tmp, "%ld", args[sc->offset]);
break;
case Name: {
/* NULL-terminated string. */
char *tmp2;
@ -1089,8 +1126,10 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval,
asprintf(&tmp, "0x%lx", args[sc->offset]);
break;
}
tmp = malloc(sys_nsig * 8); /* 7 bytes avg per signal name */
tmp = malloc(sys_nsig * 8 + 2); /* 7 bytes avg per signal name */
used = 0;
tmp[used++] = '{';
tmp[used++] = ' ';
for (i = 1; i < sys_nsig; i++) {
if (sigismember(&ss, i)) {
signame = strsig(i);
@ -1098,10 +1137,11 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval,
free(signame);
}
}
if (used)
tmp[used-1] = 0;
else
strcpy(tmp, "0x0");
if (tmp[used - 1] == '|')
used--;
tmp[used++] = ' ';
tmp[used++] = '}';
tmp[used++] = '\0';
break;
}
case Sigprocmask: {
@ -1447,6 +1487,9 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval,
tmp = strdup(xlookup_bits(access_modes,
args[sc->offset]));
break;
case Sysarch:
tmp = strdup(xlookup(sysarch_ops, args[sc->offset]));
break;
default:
errx(1, "Invalid argument type %d\n", sc->type & ARG_MASK);
}