X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/316670eb35587141e969394ae8537d66b9211e80..a1c7dba18ef36983396c282fe85292db066e39db:/bsd/dev/dtrace/systrace.c?ds=inline diff --git a/bsd/dev/dtrace/systrace.c b/bsd/dev/dtrace/systrace.c index 6761beec9..c8a6305b1 100644 --- a/bsd/dev/dtrace/systrace.c +++ b/bsd/dev/dtrace/systrace.c @@ -25,35 +25,21 @@ /* #pragma ident "@(#)systrace.c 1.6 06/09/19 SMI" */ -#if !defined(__APPLE__) -#include -#include -#include -#include -#include -#include -#include -#include -#define SYSTRACE_ARTIFICIAL_FRAMES 1 -#else - #ifdef KERNEL #ifndef _KERNEL #define _KERNEL /* Solaris vs. Darwin */ #endif #endif -#define MACH__POSIX_C_SOURCE_PRIVATE 1 /* pulls in suitable savearea from mach/ppc/thread_status.h */ #include #include + /* XXX All of these should really be derived from syscall_sw.h */ -#if defined(__i386__) || defined (__x86_64__) +#if defined (__x86_64__) #define SYSCALL_CLASS_SHIFT 24 #define SYSCALL_CLASS_MASK (0xFF << SYSCALL_CLASS_SHIFT) #define SYSCALL_NUMBER_MASK (~SYSCALL_CLASS_MASK) #define I386_SYSCALL_NUMBER_MASK (0xFFFF) - -typedef x86_saved_state_t savearea_t; #endif #include @@ -75,7 +61,7 @@ typedef x86_saved_state_t savearea_t; #include -#if defined(__i386__) || defined (__x86_64__) +#if defined (__x86_64__) #define SYSTRACE_ARTIFICIAL_FRAMES 2 #define MACHTRACE_ARTIFICIAL_FRAMES 3 #else @@ -114,8 +100,7 @@ systrace_stub(dtrace_id_t id, uint64_t arg0, uint64_t arg1, int32_t dtrace_systrace_syscall(struct proc *pp, void *uap, int *rv) { - boolean_t flavor; - unsigned short code; + unsigned short code; /* The system call number */ systrace_sysent_t *sy; dtrace_id_t id; @@ -125,8 +110,7 @@ dtrace_systrace_syscall(struct proc *pp, void *uap, int *rv) #endif syscall_arg_t *ip = (syscall_arg_t *)uap; -#if defined(__i386__) || defined (__x86_64__) -#pragma unused(flavor) +#if defined (__x86_64__) { pal_register_cache_state(current_thread(), VALID); x86_saved_state_t *tagged_regs = (x86_saved_state_t *)find_user_regs(current_thread()); @@ -173,6 +157,7 @@ dtrace_systrace_syscall(struct proc *pp, void *uap, int *rv) #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. */ @@ -327,7 +312,6 @@ dtrace_systrace_syscall_return(unsigned short code, int rval, int *rv) (*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) @@ -342,38 +326,12 @@ dtrace_systrace_syscall_return(unsigned short code, int rval, int *rv) 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) { @@ -408,7 +366,6 @@ systrace_init(struct sysent *actual, systrace_sysent_t **interposed) lck_mtx_init(&dtrace_systrace_lock, dtrace_lck_grp, dtrace_lck_attr); } -#endif /* __APPLE__ */ /*ARGSUSED*/ static void @@ -448,9 +405,7 @@ systrace_provide(void *arg, const dtrace_probedesc_t *desc) #endif } } -#if defined(__APPLE__) #undef systrace_init -#endif /*ARGSUSED*/ static void @@ -588,19 +543,6 @@ systrace_attach(dev_info_t *devi, ddi_attach_cmd_t cmd) 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(); @@ -612,7 +554,6 @@ systrace_attach(dev_info_t *devi, ddi_attach_cmd_t cmd) ddi_remove_minor_node(devi, NULL); return (DDI_FAILURE); } -#endif /* __APPLE__ */ ddi_report_dev(devi); systrace_devi = devi; @@ -620,6 +561,10 @@ systrace_attach(dev_info_t *devi, ddi_attach_cmd_t cmd) 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) @@ -640,118 +585,27 @@ 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 which may be changed for 64 bit! */ -typedef void mach_munge_t(const void *, void *); +/* APPLE NOTE: From #include 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 0 /* no active architectures use mungers for mach traps */ +#if defined(__arm64__) || defined(__x86_64__) mach_munge_t *mach_trap_arg_munge32; /* system call arguments for 32-bit */ - mach_munge_t *mach_trap_arg_munge64; /* system call arguments for 64-bit */ #endif + int mach_trap_u32_words; #if MACH_ASSERT const char* mach_trap_name; #endif /* MACH_ASSERT */ } mach_trap_t; -extern mach_trap_t mach_trap_table[]; +extern const mach_trap_t mach_trap_table[]; /* syscall_sw.h now declares this as const */ extern int mach_trap_count; extern const char *mach_syscall_name_table[]; @@ -796,8 +650,7 @@ static dtrace_provider_id_t machtrace_id; static kern_return_t dtrace_machtrace_syscall(struct mach_call_args *args) { - boolean_t flavor; - unsigned short code; + int code; /* The mach call number */ machtrace_sysent_t *sy; dtrace_id_t id; @@ -808,8 +661,7 @@ dtrace_machtrace_syscall(struct mach_call_args *args) syscall_arg_t *ip = (syscall_arg_t *)args; mach_call_t mach_call; -#if defined(__i386__) || defined (__x86_64__) -#pragma unused(flavor) +#if defined (__x86_64__) { pal_register_cache_state(current_thread(), VALID); x86_saved_state_t *tagged_regs = (x86_saved_state_t *)find_user_regs(current_thread()); @@ -840,6 +692,7 @@ dtrace_machtrace_syscall(struct mach_call_args *args) #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. */ @@ -862,7 +715,7 @@ dtrace_machtrace_syscall(struct mach_call_args *args) } static void -machtrace_init(mach_trap_t *actual, machtrace_sysent_t **interposed) +machtrace_init(const mach_trap_t *actual, machtrace_sysent_t **interposed) { machtrace_sysent_t *msysent = *interposed; int i; @@ -873,7 +726,7 @@ machtrace_init(mach_trap_t *actual, machtrace_sysent_t **interposed) } for (i = 0; i < NSYSCALL; i++) { - mach_trap_t *a = &actual[i]; + const mach_trap_t *a = &actual[i]; machtrace_sysent_t *s = &msysent[i]; if (LOADABLE_SYSCALL(a) && !LOADED_SYSCALL(a)) @@ -1033,16 +886,6 @@ machtrace_attach(dev_info_t *devi, ddi_attach_cmd_t cmd) 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(); @@ -1051,7 +894,6 @@ machtrace_attach(dev_info_t *devi, ddi_attach_cmd_t cmd) 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); } @@ -1117,7 +959,6 @@ void systrace_init( void ) 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)