long
powerpc_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused)
{
struct reg regs;
long retval;
int i;
int errorp;
struct syscall *sc;
if (fsc.name == NULL)
return (-1);
cpid = trussinfo->curthread->tid;
if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) {
fprintf(trussinfo->outfile, "\n");
return (-1);
}
retval = regs.fixreg[3];
errorp = !!(regs.cr & 0x10000000);
/*
* This code, while simpler than the initial versions I used, could
* stand some significant cleaning.
*/
sc = fsc.sc;
if (!sc) {
for (i = 0; i < fsc.nargs; i++)
asprintf(&fsc.s_args[i], "0x%lx", fsc.args[i]);
} else {
/*
* On 32-bit big-endian, the low word of a 64-bit return is
* in the greater address. Switch to this. XXX note that
* print_syscall_ret can't handle 64-bit return values (llseek)
*/
if (sc->ret_type == 2)
retval = regs.fixreg[4];
/*
* Here, we only look for arguments that have OUT masked in --
* otherwise, they were handled in the syscall_entry function.
*/
for (i = 0; i < sc->nargs; i++) {
char *temp;
if (sc->args[i].type & OUT) {
/*
* If an error occurred, than don't bothe getting the data;
* it may not be valid.
*/
if (errorp)
asprintf(&temp, "0x%lx", fsc.args[sc->args[i].offset]);
else
temp = print_arg(&sc->args[i], fsc.args, retval, trussinfo);
fsc.s_args[i] = temp;
}
}
}
if (fsc.name != NULL &&
(!strcmp(fsc.name, "execve") || !strcmp(fsc.name, "exit"))) {
trussinfo->curthread->in_syscall = 1;
}
/*
* It would probably be a good idea to merge the error handling,
* but that complicates things considerably.
*/
print_syscall_ret(trussinfo, fsc.name, fsc.nargs, fsc.s_args, errorp,
retval, fsc.sc);
clear_fsc();
return (retval);
}
void
powerpc_syscall_entry(struct trussinfo *trussinfo, int nargs) {
char buf[32];
struct reg regs;
void *args;
int syscall_num;
int i;
unsigned int regargs;
struct syscall *sc;
/* Account for a 64-bit argument with corresponding alignment. */
nargs += 2;
cpid = trussinfo->curthread->tid;
clear_fsc();
if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) {
fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
return;
}
/*
* FreeBSD has two special kinds of system call redirctions --
* SYS_syscall, and SYS___syscall. The former is the old syscall()
* routine, basically; the latter is for quad-aligned arguments.
*/
regargs = NARGREG;
syscall_num = regs.fixreg[0];
args = ®s.fixreg[3];
if (syscall_num == SYS_syscall) {
args = ®s.fixreg[4];
regargs -= 1;
syscall_num = regs.fixreg[3];
} else if (syscall_num == SYS___syscall) {
args = ®s.fixreg[5];
regargs -= 2;
syscall_num = regs.fixreg[4];
}
fsc.number = syscall_num;
fsc.name =
(syscall_num < 0 || syscall_num >= nsyscalls) ? NULL : syscallnames[syscall_num];
if (!fsc.name) {
fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
}
if (fsc.name && (trussinfo->flags & FOLLOWFORKS)
&& ((!strcmp(fsc.name, "fork")
|| !strcmp(fsc.name, "rfork")
|| !strcmp(fsc.name, "vfork"))))
{
trussinfo->curthread->in_fork = 1;
}
if (nargs == 0)
return;
fsc.args = malloc((1+nargs) * sizeof(unsigned long));
if (nargs > regargs) {
struct ptrace_io_desc iorequest;
memmove(&fsc.args[0], args, regargs * sizeof(fsc.args[0]));
iorequest.piod_op = PIOD_READ_D;
iorequest.piod_offs = (void *)(regs.fixreg[1] + 8);
iorequest.piod_addr = &fsc.args[regargs];
iorequest.piod_len = (nargs - regargs) * sizeof(fsc.args[0]);
ptrace(PT_IO, cpid, (caddr_t)&iorequest, 0);
if (iorequest.piod_len == 0)
return;
} else {
memmove(&fsc.args[0], args, nargs * sizeof(fsc.args[0]));
}
sc = get_syscall(fsc.name);
if (sc) {
fsc.nargs = sc->nargs;
} else {
#if DEBUG
fprintf(trussinfo->outfile, "unknown syscall %s -- setting args to %d\n",
fsc.name, nargs);
#endif
fsc.nargs = nargs;
}
fsc.s_args = calloc(1, (1+fsc.nargs) * sizeof(char*));
fsc.sc = sc;
/*
* At this point, we set up the system call arguments.
* We ignore any OUT ones, however -- those are arguments that
* are set by the system call, and so are probably meaningless
* now. This doesn't currently support arguments that are
* passed in *and* out, however.
*/
if (fsc.name) {
#if DEBUG
fprintf(stderr, "syscall %s(", fsc.name);
#endif
for (i = 0; i < fsc.nargs; i++) {
#if DEBUG
fprintf(stderr, "0x%x%s",
sc
? fsc.args[sc->args[i].offset]
: fsc.args[i],
i < (fsc.nargs - 1) ? "," : "");
#endif
if (sc && !(sc->args[i].type & OUT)) {
fsc.s_args[i] = print_arg(&sc->args[i], fsc.args, 0, trussinfo);
}
}
#if DEBUG
fprintf(stderr, ")\n");
#endif
}
#if DEBUG
fprintf(trussinfo->outfile, "\n");
#endif
if (fsc.name && (!strcmp(fsc.name, "execve") || !strcmp(fsc.name, "exit"))) {
/* XXX
* This could be done in a more general
* manner but it still wouldn't be very pretty.
*/
if (!strcmp(fsc.name, "execve")) {
if ((trussinfo->flags & EXECVEARGS) == 0)
if (fsc.s_args[1]) {
free(fsc.s_args[1]);
fsc.s_args[1] = NULL;
}
if ((trussinfo->flags & EXECVEENVS) == 0)
if (fsc.s_args[2]) {
free(fsc.s_args[2]);
fsc.s_args[2] = NULL;
}
}
}
return;
}
long
amd64_linux32_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused)
{
struct reg regs;
long retval;
int i;
int errorp;
struct syscall *sc;
if (fsc.name == NULL)
return (-1);
cpid = trussinfo->curthread->tid;
if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0)
{
fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
return (-1);
}
retval = regs.r_rax;
errorp = !!(regs.r_rflags & PSL_C);
/*
* This code, while simpler than the initial versions I used, could
* stand some significant cleaning.
*/
sc = fsc.sc;
if (!sc) {
for (i = 0; i < fsc.nargs; i++)
asprintf(&fsc.s_args[i], "0x%lx", fsc.args[i]);
} else {
/*
* Here, we only look for arguments that have OUT masked in --
* otherwise, they were handled in the syscall_entry function.
*/
for (i = 0; i < sc->nargs; i++) {
char *temp;
if (sc->args[i].type & OUT) {
/*
* If an error occurred, than don't bothe getting the data;
* it may not be valid.
*/
if (errorp)
asprintf(&temp, "0x%lx", fsc.args[sc->args[i].offset]);
else
temp = print_arg(&sc->args[i], fsc.args, retval, trussinfo);
fsc.s_args[i] = temp;
}
}
}
/*
* It would probably be a good idea to merge the error handling,
* but that complicates things considerably.
*/
if (errorp) {
for (i = 0; (size_t)i < sizeof(bsd_to_linux_errno) / sizeof(int); i++)
if (retval == bsd_to_linux_errno[i])
break;
}
if (fsc.name != NULL &&
(!strcmp(fsc.name, "linux_execve") || !strcmp(fsc.name, "exit"))) {
trussinfo->curthread->in_syscall = 1;
}
print_syscall_ret(trussinfo, fsc.name, fsc.nargs, fsc.s_args, errorp,
errorp ? i : retval, fsc.sc);
clear_fsc();
return (retval);
}
void
mips_syscall_entry(struct trussinfo *trussinfo, int nargs) {
struct reg regs;
int syscall_num;
int i;
struct syscall *sc;
int indir = 0; /* indirect system call */
struct ptrace_io_desc iorequest;
cpid = trussinfo->curthread->tid;
clear_fsc();
if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) {
fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
return;
}
syscall_num = regs.r_regs[V0];
if (syscall_num == SYS_syscall) {
indir = 1;
syscall_num = regs.r_regs[A0];
}
fsc.number = syscall_num;
fsc.name =
(syscall_num < 0 || syscall_num >= nsyscalls) ? NULL : syscallnames[syscall_num];
if (!fsc.name) {
fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
}
if (fsc.name && (trussinfo->flags & FOLLOWFORKS)
&& ((!strcmp(fsc.name, "fork")
|| !strcmp(fsc.name, "rfork")
|| !strcmp(fsc.name, "vfork"))))
{
trussinfo->curthread->in_fork = 1;
}
if (nargs == 0)
return;
fsc.args = malloc((1+nargs) * sizeof(unsigned long));
#if 0 // XXX
iorequest.piod_op = PIOD_READ_D;
iorequest.piod_offs = (void *)parm_offset;
iorequest.piod_addr = fsc.args;
iorequest.piod_len = (1+nargs) * sizeof(unsigned long);
ptrace(PT_IO, cpid, (caddr_t)&iorequest, 0);
if (iorequest.piod_len == 0)
return;
#else
iorequest.piod_op = PIOD_READ_D;
#endif
switch (nargs) {
default:
/*
* The OS doesn't seem to allow more than 10 words of
* parameters (yay!). So we shouldn't be here.
*/
warn("More than 10 words (%d) of arguments!\n", nargs);
break;
case 10:
case 9:
case 8:
case 7:
case 6:
case 5:
/*
* If there are 7-10 words of arguments, they are placed
* on the stack, as is normal for other processors.
* The fall-through for all of these is deliberate!!!
*/
// XXX BAD constant used here
iorequest.piod_op = PIOD_READ_D;
iorequest.piod_offs = (void *)(regs.r_regs[SP] + 4 * sizeof(uint32_t));
iorequest.piod_addr = &fsc.args[4];
iorequest.piod_len = (nargs - 4) * sizeof(fsc.args[0]);
ptrace(PT_IO, cpid, (caddr_t)&iorequest, 0);
if (iorequest.piod_len == 0) return;
case 4:
fsc.args[3] = regs.r_regs[A3];
case 3:
fsc.args[2] = regs.r_regs[A2];
case 2:
fsc.args[1] = regs.r_regs[A1];
case 1:
fsc.args[0] = regs.r_regs[A0];
case 0:
break;
}
if (indir) {
memmove(&fsc.args[0], &fsc.args[1], (nargs-1) * sizeof(fsc.args[0]));
}
sc = get_syscall(fsc.name);
if (sc) {
fsc.nargs = sc->nargs;
} else {
#if DEBUG
fprintf(trussinfo->outfile, "unknown syscall %s -- setting args to %d\n",
fsc.name, nargs);
#endif
fsc.nargs = nargs;
}
fsc.s_args = calloc(1, (1+fsc.nargs) * sizeof(char*));
fsc.sc = sc;
/*
* At this point, we set up the system call arguments.
* We ignore any OUT ones, however -- those are arguments that
* are set by the system call, and so are probably meaningless
* now. This doesn't currently support arguments that are
* passed in *and* out, however.
*/
if (fsc.name) {
#if DEBUG
fprintf(stderr, "syscall %s(", fsc.name);
#endif
for (i = 0; i < fsc.nargs; i++) {
#if DEBUG
fprintf(stderr, "0x%x%s",
sc
? fsc.args[sc->args[i].offset]
: fsc.args[i],
i < (fsc.nargs - 1) ? "," : "");
#endif
if (sc && !(sc->args[i].type & OUT)) {
fsc.s_args[i] = print_arg(&sc->args[i], fsc.args, 0, trussinfo);
}
}
#if DEBUG
fprintf(stderr, ")\n");
#endif
}
#if DEBUG
fprintf(trussinfo->outfile, "\n");
#endif
if (fsc.name != NULL &&
(!strcmp(fsc.name, "execve") || !strcmp(fsc.name, "exit"))) {
/* XXX
* This could be done in a more general
* manner but it still wouldn't be very pretty.
*/
if (!strcmp(fsc.name, "execve")) {
if ((trussinfo->flags & EXECVEARGS) == 0)
if (fsc.s_args[1]) {
free(fsc.s_args[1]);
fsc.s_args[1] = NULL;
}
if ((trussinfo->flags & EXECVEENVS) == 0)
if (fsc.s_args[2]) {
free(fsc.s_args[2]);
fsc.s_args[2] = NULL;
}
}
}
return;
}
void
amd64_linux32_syscall_entry(struct trussinfo *trussinfo, int nargs) {
struct reg regs;
int syscall_num;
int i;
struct syscall *sc;
cpid = trussinfo->curthread->tid;
clear_fsc();
if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0)
{
fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
return;
}
syscall_num = regs.r_rax;
fsc.number = syscall_num;
fsc.name =
(syscall_num < 0 || syscall_num >= nsyscalls) ? NULL : linux32_syscallnames[syscall_num];
if (!fsc.name) {
fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
}
if (fsc.name && (trussinfo->flags & FOLLOWFORKS)
&& ((!strcmp(fsc.name, "linux_fork")
|| !strcmp(fsc.name, "linux_vfork"))))
{
trussinfo->curthread->in_fork = 1;
}
if (nargs == 0)
return;
/*
* Linux passes syscall arguments in registers, not
* on the stack. Fortunately, we've got access to the
* register set. Note that we don't bother checking the
* number of arguments. And what does linux do for syscalls
* that have more than five arguments?
*/
fsc.args[0] = regs.r_rbx;
fsc.args[1] = regs.r_rcx;
fsc.args[2] = regs.r_rdx;
fsc.args[3] = regs.r_rsi;
fsc.args[4] = regs.r_rdi;
sc = get_syscall(fsc.name);
if (sc) {
fsc.nargs = sc->nargs;
} else {
#if DEBUG
fprintf(trussinfo->outfile, "unknown syscall %s -- setting args to %d\n",
fsc.name, nargs);
#endif
fsc.nargs = nargs;
}
fsc.s_args = calloc(1, (1+fsc.nargs) * sizeof(char*));
fsc.sc = sc;
/*
* At this point, we set up the system call arguments.
* We ignore any OUT ones, however -- those are arguments that
* are set by the system call, and so are probably meaningless
* now. This doesn't currently support arguments that are
* passed in *and* out, however.
*/
if (fsc.name) {
#if DEBUG
fprintf(stderr, "syscall %s(", fsc.name);
#endif
for (i = 0; i < fsc.nargs; i++) {
#if DEBUG
fprintf(stderr, "0x%x%s",
sc
? fsc.args[sc->args[i].offset]
: fsc.args[i],
i < (fsc.nargs - 1) ? "," : "");
#endif
if (sc && !(sc->args[i].type & OUT)) {
fsc.s_args[i] = print_arg(&sc->args[i], fsc.args, 0, trussinfo);
}
}
#if DEBUG
fprintf(stderr, ")\n");
#endif
}
#if DEBUG
fprintf(trussinfo->outfile, "\n");
#endif
if (fsc.name != NULL &&
(!strcmp(fsc.name, "linux_execve") || !strcmp(fsc.name, "exit"))) {
/* XXX
* This could be done in a more general
* manner but it still wouldn't be very pretty.
*/
if (!strcmp(fsc.name, "linux_execve")) {
if ((trussinfo->flags & EXECVEARGS) == 0)
if (fsc.s_args[1]) {
free(fsc.s_args[1]);
fsc.s_args[1] = NULL;
}
if ((trussinfo->flags & EXECVEENVS) == 0)
if (fsc.s_args[2]) {
free(fsc.s_args[2]);
fsc.s_args[2] = NULL;
}
}
}
return;
}
