Differential D22401 Diff 64418 sys/compat/freebsd32/freebsd32_misc.c

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sys/compat/freebsd32/freebsd32_misc.c

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	int			int
	syscall32_helper_unregister(struct syscall_helper_data *sd)			syscall32_helper_unregister(struct syscall_helper_data *sd)
	{			{

	return (kern_syscall_helper_unregister(freebsd32_sysent, sd));			return (kern_syscall_helper_unregister(freebsd32_sysent, sd));
	}			}

	register_t *			int
	freebsd32_copyout_strings(struct image_params *imgp)			freebsd32_copyout_strings(struct image_params imgp, register_t *stack_base)
	{			{
	int argc, envc, i;			int argc, envc, i;
	u_int32_t *vectp;			u_int32_t *vectp;
	char *stringp;			char *stringp;
	uintptr_t destp;			uintptr_t destp;
	u_int32_t *stack_base;
	struct freebsd32_ps_strings *arginfo;			struct freebsd32_ps_strings *arginfo;
	char canary[sizeof(long) * 8];			char canary[sizeof(long) * 8];
	int32_t pagesizes32[MAXPAGESIZES];			int32_t pagesizes32[MAXPAGESIZES];
	size_t execpath_len;			size_t execpath_len;
	int szsigcode;			int error, szsigcode;

	/*			/*
	* Calculate string base and vector table pointers.			* Calculate string base and vector table pointers.
	* Also deal with signal trampoline code for this exec type.			* Also deal with signal trampoline code for this exec type.
	*/			*/
	if (imgp->execpath != NULL && imgp->auxargs != NULL)			if (imgp->execpath != NULL && imgp->auxargs != NULL)
	execpath_len = strlen(imgp->execpath) + 1;			execpath_len = strlen(imgp->execpath) + 1;
	else			else
	execpath_len = 0;			execpath_len = 0;
	arginfo = (struct freebsd32_ps_strings *)curproc->p_sysent->			arginfo = (struct freebsd32_ps_strings *)curproc->p_sysent->
	sv_psstrings;			sv_psstrings;
	if (imgp->proc->p_sysent->sv_sigcode_base == 0)			if (imgp->proc->p_sysent->sv_sigcode_base == 0)
	szsigcode = *(imgp->proc->p_sysent->sv_szsigcode);			szsigcode = *(imgp->proc->p_sysent->sv_szsigcode);
	else			else
	szsigcode = 0;			szsigcode = 0;
	destp = (uintptr_t)arginfo;			destp = (uintptr_t)arginfo;

	/*			/*
	* install sigcode			* install sigcode
	*/			*/
	if (szsigcode != 0) {			if (szsigcode != 0) {
	destp -= szsigcode;			destp -= szsigcode;
	destp = rounddown2(destp, sizeof(uint32_t));			destp = rounddown2(destp, sizeof(uint32_t));
	copyout(imgp->proc->p_sysent->sv_sigcode, (void *)destp,			error = copyout(imgp->proc->p_sysent->sv_sigcode, (void *)destp,
	szsigcode);			szsigcode);
				if (error)
				return (error);
	}			}

	/*			/*
	* Copy the image path for the rtld.			* Copy the image path for the rtld.
	*/			*/
	if (execpath_len != 0) {			if (execpath_len != 0) {
	destp -= execpath_len;			destp -= execpath_len;
	imgp->execpathp = destp;			imgp->execpathp = destp;
	copyout(imgp->execpath, (void *)destp, execpath_len);			error = copyout(imgp->execpath, (void *)destp, execpath_len);
				if (error)
				return (error);
	}			}

	/*			/*
	* Prepare the canary for SSP.			* Prepare the canary for SSP.
	*/			*/
	arc4rand(canary, sizeof(canary), 0);			arc4rand(canary, sizeof(canary), 0);
	destp -= sizeof(canary);			destp -= sizeof(canary);
	imgp->canary = destp;			imgp->canary = destp;
	copyout(canary, (void *)destp, sizeof(canary));			error = copyout(canary, (void *)destp, sizeof(canary));
				if (error)
				return (error);
	imgp->canarylen = sizeof(canary);			imgp->canarylen = sizeof(canary);

	/*			/*
	* Prepare the pagesizes array.			* Prepare the pagesizes array.
	*/			*/
	for (i = 0; i < MAXPAGESIZES; i++)			for (i = 0; i < MAXPAGESIZES; i++)
	pagesizes32[i] = (uint32_t)pagesizes[i];			pagesizes32[i] = (uint32_t)pagesizes[i];
	destp -= sizeof(pagesizes32);			destp -= sizeof(pagesizes32);
	destp = rounddown2(destp, sizeof(uint32_t));			destp = rounddown2(destp, sizeof(uint32_t));
	imgp->pagesizes = destp;			imgp->pagesizes = destp;
	copyout(pagesizes32, (void *)destp, sizeof(pagesizes32));			error = copyout(pagesizes32, (void *)destp, sizeof(pagesizes32));
				if (error)
				return (error);
	imgp->pagesizeslen = sizeof(pagesizes32);			imgp->pagesizeslen = sizeof(pagesizes32);

	destp -= ARG_MAX - imgp->args->stringspace;			destp -= ARG_MAX - imgp->args->stringspace;
	destp = rounddown2(destp, sizeof(uint32_t));			destp = rounddown2(destp, sizeof(uint32_t));

	vectp = (uint32_t *)destp;			vectp = (uint32_t *)destp;
	if (imgp->sysent->sv_stackgap != NULL)			if (imgp->sysent->sv_stackgap != NULL)
	imgp->sysent->sv_stackgap(imgp, (u_long *)&vectp);			imgp->sysent->sv_stackgap(imgp, (u_long *)&vectp);

	if (imgp->auxargs)			if (imgp->auxargs) {
	imgp->sysent->sv_copyout_auxargs(imgp, (u_long *)&vectp);			error = imgp->sysent->sv_copyout_auxargs(imgp,
				(u_long *)&vectp);
				if (error)
				return (error);
				}

	/*			/*
	* Allocate room for the argv[] and env vectors including the			* Allocate room for the argv[] and env vectors including the
	* terminating NULL pointers.			* terminating NULL pointers.
	*/			*/
	vectp -= imgp->args->argc + 1 + imgp->args->envc + 1;			vectp -= imgp->args->argc + 1 + imgp->args->envc + 1;

	/*			/*
	* vectp also becomes our initial stack base			* vectp also becomes our initial stack base
	*/			*/
	stack_base = vectp;			stack_base = (register_t )vectp;

	stringp = imgp->args->begin_argv;			stringp = imgp->args->begin_argv;
	argc = imgp->args->argc;			argc = imgp->args->argc;
	envc = imgp->args->envc;			envc = imgp->args->envc;
	/*			/*
	* Copy out strings - arguments and environment.			* Copy out strings - arguments and environment.
	*/			*/
	copyout(stringp, (void *)destp, ARG_MAX - imgp->args->stringspace);			error = copyout(stringp, (void *)destp,
				ARG_MAX - imgp->args->stringspace);
				if (error)
				return (error);

	/*			/*
	* Fill in "ps_strings" struct for ps, w, etc.			* Fill in "ps_strings" struct for ps, w, etc.
	*/			*/
	suword32(&arginfo->ps_argvstr, (u_int32_t)(intptr_t)vectp);			if (suword32(&arginfo->ps_argvstr, (u_int32_t)(intptr_t)vectp) != 0 \|\|
	suword32(&arginfo->ps_nargvstr, argc);			suword32(&arginfo->ps_nargvstr, argc) != 0)
				return (EFAULT);

	/*			/*
	* Fill in argument portion of vector table.			* Fill in argument portion of vector table.
	*/			*/
	for (; argc > 0; --argc) {			for (; argc > 0; --argc) {
	suword32(vectp++, (u_int32_t)(intptr_t)destp);			if (suword32(vectp++, (u_int32_t)(intptr_t)destp) != 0)
				return (EFAULT);
	while (*stringp++ != 0)			while (*stringp++ != 0)
	destp++;			destp++;
	destp++;			destp++;
	}			}

	/* a null vector table pointer separates the argp's from the envp's */			/* a null vector table pointer separates the argp's from the envp's */
	suword32(vectp++, 0);			if (suword32(vectp++, 0) != 0)
				return (EFAULT);

	suword32(&arginfo->ps_envstr, (u_int32_t)(intptr_t)vectp);			if (suword32(&arginfo->ps_envstr, (u_int32_t)(intptr_t)vectp) != 0 \|\|
	suword32(&arginfo->ps_nenvstr, envc);			suword32(&arginfo->ps_nenvstr, envc) != 0)
				return (EFAULT);

	/*			/*
	* Fill in environment portion of vector table.			* Fill in environment portion of vector table.
	*/			*/
	for (; envc > 0; --envc) {			for (; envc > 0; --envc) {
	suword32(vectp++, (u_int32_t)(intptr_t)destp);			if (suword32(vectp++, (u_int32_t)(intptr_t)destp) != 0)
				return (EFAULT);
	while (*stringp++ != 0)			while (*stringp++ != 0)
	destp++;			destp++;
	destp++;			destp++;
	}			}

	/* end of vector table is a null pointer */			/* end of vector table is a null pointer */
	suword32(vectp, 0);			if (suword32(vectp, 0) != 0)
				return (EFAULT);

	return ((register_t *)stack_base);			return (0);
	}			}

	int			int
	freebsd32_kldstat(struct thread td, struct freebsd32_kldstat_args uap)			freebsd32_kldstat(struct thread td, struct freebsd32_kldstat_args uap)
	{			{
	struct kld_file_stat *stat;			struct kld_file_stat *stat;
	struct kld32_file_stat *stat32;			struct kld32_file_stat *stat32;
	int error, version;			int error, version;
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