/* #pragma ident "@(#)systrace.c 1.6 06/09/19 SMI" */
-#if !defined(__APPLE__)
-#include <sys/dtrace.h>
-#include <sys/systrace.h>
-#include <sys/stat.h>
-#include <sys/systm.h>
-#include <sys/conf.h>
-#include <sys/ddi.h>
-#include <sys/sunddi.h>
-#include <sys/atomic.h>
-#define SYSTRACE_ARTIFICIAL_FRAMES 1
-#else
-
#ifdef KERNEL
#ifndef _KERNEL
#define _KERNEL /* Solaris vs. Darwin */
#include <sys/ioctl.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
+#include <sys/syscall.h>
#include <miscfs/devfs/devfs.h>
#include <sys/dtrace.h>
#endif
// Bounds "check" the value of code a la unix_syscall
- sy = (code >= NUM_SYSENT) ? &systrace_sysent[63] : &systrace_sysent[code];
+ sy = (code >= nsysent) ? &systrace_sysent[SYS_invalid] : &systrace_sysent[code];
if ((id = sy->stsy_entry) != DTRACE_IDNONE) {
uthread_t uthread = (uthread_t)get_bsdthread_info(current_thread());
#if 0 /* XXX */
/*
+ * APPLE NOTE: Not implemented.
* We want to explicitly allow DTrace consumers to stop a process
* before it actually executes the meat of the syscall.
*/
dtrace_id_t id;
// Bounds "check" the value of code a la unix_syscall_return
- sy = (code >= NUM_SYSENT) ? &systrace_sysent[63] : &systrace_sysent[code];
+ sy = (code >= nsysent) ? &systrace_sysent[SYS_invalid] : &systrace_sysent[code];
if ((id = sy->stsy_return) != DTRACE_IDNONE) {
uint64_t munged_rv0, munged_rv1;
(*systrace_probe)(id, munged_rv0, munged_rv0, munged_rv1, (uint64_t)rval, 0);
}
}
-#endif /* __APPLE__ */
#define SYSTRACE_SHIFT 16
#define SYSTRACE_ISENTRY(x) ((int)(x) >> SYSTRACE_SHIFT)
static dev_info_t *systrace_devi;
static dtrace_provider_id_t systrace_id;
-#if !defined (__APPLE__)
-static void
-systrace_init(struct sysent *actual, systrace_sysent_t **interposed)
-{
- systrace_sysent_t *sysent = *interposed;
- int i;
-
- if (sysent == NULL) {
- *interposed = sysent = kmem_zalloc(sizeof (systrace_sysent_t) *
- NSYSCALL, KM_SLEEP);
- }
-
- for (i = 0; i < NSYSCALL; i++) {
- struct sysent *a = &actual[i];
- systrace_sysent_t *s = &sysent[i];
-
- if (LOADABLE_SYSCALL(a) && !LOADED_SYSCALL(a))
- continue;
-
- if (a->sy_callc == dtrace_systrace_syscall)
- continue;
-
-#ifdef _SYSCALL32_IMPL
- if (a->sy_callc == dtrace_systrace_syscall32)
- continue;
-#endif
+/*
+ * APPLE NOTE: Avoid name clash with Darwin automagic conf symbol.
+ * See balanced undef below.
+ */
+#define systrace_init _systrace_init
- s->stsy_underlying = a->sy_callc;
- }
-}
-#else
-#define systrace_init _systrace_init /* Avoid name clash with Darwin automagic conf symbol */
static void
systrace_init(struct sysent *actual, systrace_sysent_t **interposed)
{
systrace_sysent_t *ssysent = *interposed; /* Avoid sysent shadow warning
from bsd/sys/sysent.h */
- int i;
+ unsigned int i;
if (ssysent == NULL) {
*interposed = ssysent = kmem_zalloc(sizeof (systrace_sysent_t) *
lck_mtx_init(&dtrace_systrace_lock, dtrace_lck_grp, dtrace_lck_attr);
}
-#endif /* __APPLE__ */
/*ARGSUSED*/
static void
systrace_provide(void *arg, const dtrace_probedesc_t *desc)
{
#pragma unused(arg) /* __APPLE__ */
- int i;
+ unsigned int i;
if (desc != NULL)
return;
#endif
}
}
-#if defined(__APPLE__)
#undef systrace_init
-#endif
/*ARGSUSED*/
static void
return (DDI_FAILURE);
}
-#if !defined(__APPLE__)
- systrace_probe = (void (*)())dtrace_probe;
- membar_enter();
-
- if (ddi_create_minor_node(devi, "systrace", S_IFCHR, 0,
- DDI_PSEUDO, NULL) == DDI_FAILURE ||
- dtrace_register("syscall", &systrace_attr, DTRACE_PRIV_USER, NULL,
- &systrace_pops, NULL, &systrace_id) != 0) {
- systrace_probe = systrace_stub;
- ddi_remove_minor_node(devi, NULL);
- return (DDI_FAILURE);
- }
-#else
systrace_probe = (void(*))&dtrace_probe;
membar_enter();
ddi_remove_minor_node(devi, NULL);
return (DDI_FAILURE);
}
-#endif /* __APPLE__ */
ddi_report_dev(devi);
systrace_devi = devi;
return (DDI_SUCCESS);
}
+
+/*
+ * APPLE NOTE: systrace_detach not implemented
+ */
#if !defined(__APPLE__)
static int
systrace_detach(dev_info_t *devi, ddi_detach_cmd_t cmd)
systrace_probe = systrace_stub;
return (DDI_SUCCESS);
}
+#endif /* __APPLE__ */
-/*ARGSUSED*/
-static int
-systrace_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
-{
- int error;
-
- switch (infocmd) {
- case DDI_INFO_DEVT2DEVINFO:
- *result = (void *)systrace_devi;
- error = DDI_SUCCESS;
- break;
- case DDI_INFO_DEVT2INSTANCE:
- *result = (void *)0;
- error = DDI_SUCCESS;
- break;
- default:
- error = DDI_FAILURE;
- }
- return (error);
-}
-
-/*ARGSUSED*/
-static int
-systrace_open(dev_t *devp, int flag, int otyp, cred_t *cred_p)
-{
- return (0);
-}
-
-static struct cb_ops systrace_cb_ops = {
- systrace_open, /* open */
- nodev, /* close */
- nulldev, /* strategy */
- nulldev, /* print */
- nodev, /* dump */
- nodev, /* read */
- nodev, /* write */
- nodev, /* ioctl */
- nodev, /* devmap */
- nodev, /* mmap */
- nodev, /* segmap */
- nochpoll, /* poll */
- ddi_prop_op, /* cb_prop_op */
- 0, /* streamtab */
- D_NEW | D_MP /* Driver compatibility flag */
-};
-
-static struct dev_ops systrace_ops = {
- DEVO_REV, /* devo_rev, */
- 0, /* refcnt */
- systrace_info, /* get_dev_info */
- nulldev, /* identify */
- nulldev, /* probe */
- systrace_attach, /* attach */
- systrace_detach, /* detach */
- nodev, /* reset */
- &systrace_cb_ops, /* driver operations */
- NULL, /* bus operations */
- nodev /* dev power */
-};
-
-/*
- * Module linkage information for the kernel.
- */
-static struct modldrv modldrv = {
- &mod_driverops, /* module type (this is a pseudo driver) */
- "System Call Tracing", /* name of module */
- &systrace_ops, /* driver ops */
-};
-
-static struct modlinkage modlinkage = {
- MODREV_1,
- (void *)&modldrv,
- NULL
-};
-
-int
-_init(void)
-{
- return (mod_install(&modlinkage));
-}
-
-int
-_info(struct modinfo *modinfop)
-{
- return (mod_info(&modlinkage, modinfop));
-}
-int
-_fini(void)
-{
- return (mod_remove(&modlinkage));
-}
-#else
typedef kern_return_t (*mach_call_t)(void *);
-/* XXX From #include <kern/syscall_sw.h> which may be changed for 64 bit! */
-typedef void mach_munge_t(const void *, void *);
+/* APPLE NOTE: From #include <kern/syscall_sw.h> which may be changed for 64 bit! */
+typedef void mach_munge_t(void *);
typedef struct {
int mach_trap_arg_count;
kern_return_t (*mach_trap_function)(void *);
-#if defined(__x86_64__)
+#if defined(__arm64__) || defined(__x86_64__)
mach_munge_t *mach_trap_arg_munge32; /* system call arguments for 32-bit */
#endif
int mach_trap_u32_words;
#if 0 /* XXX */
/*
+ * APPLE NOTE: Not implemented.
* We want to explicitly allow DTrace consumers to stop a process
* before it actually executes the meat of the syscall.
*/
return (DDI_FAILURE);
}
-#if !defined(__APPLE__)
- machtrace_probe = (void (*)())dtrace_probe;
- membar_enter();
-
- if (ddi_create_minor_node(devi, "machtrace", S_IFCHR, 0,
- DDI_PSEUDO, NULL) == DDI_FAILURE ||
- dtrace_register("mach_trap", &machtrace_attr, DTRACE_PRIV_USER, NULL,
- &machtrace_pops, NULL, &machtrace_id) != 0) {
- machtrace_probe = systrace_stub;
-#else
machtrace_probe = dtrace_probe;
membar_enter();
dtrace_register("mach_trap", &machtrace_attr, DTRACE_PRIV_USER, NULL,
&machtrace_pops, NULL, &machtrace_id) != 0) {
machtrace_probe = (void (*))&systrace_stub;
-#endif /* __APPLE__ */
ddi_remove_minor_node(devi, NULL);
return (DDI_FAILURE);
}
void systrace_init( void )
{
if (0 == gSysTraceInited) {
+ if (dtrace_sdt_probes_restricted()) {
+ return;
+ }
+
int majdevno = cdevsw_add(SYSTRACE_MAJOR, &systrace_cdevsw);
if (majdevno < 0) {
panic("systrace_init: called twice!\n");
}
#undef SYSTRACE_MAJOR
-#endif /* __APPLE__ */
static uint64_t
systrace_getarg(void *arg, dtrace_id_t id, void *parg, int argno, int aframes)
projects / apple / xnu.git / blobdiff