Differential D22501 Diff 65189 head/sys/amd64/cloudabi32/cloudabi32_sysvec.c

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head/sys/amd64/cloudabi32/cloudabi32_sysvec.c

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	#include <compat/ia32/ia32_util.h>			#include <compat/ia32/ia32_util.h>

	extern const char *cloudabi32_syscallnames[];			extern const char *cloudabi32_syscallnames[];
	extern struct sysent cloudabi32_sysent[];			extern struct sysent cloudabi32_sysent[];

	extern unsigned long ia32_maxssiz;			extern unsigned long ia32_maxssiz;

	static int			static int
	cloudabi32_fixup_tcb(register_t *stack_base, struct image_params imgp)			cloudabi32_fixup_tcb(uintptr_t stack_base, struct image_params imgp)
	{			{
	int error;			int error;
	uint32_t args[2];			uint32_t args[2];

	/* Place auxiliary vector and TCB on the stack. */			/* Place auxiliary vector and TCB on the stack. */
	error = cloudabi32_fixup(stack_base, imgp);			error = cloudabi32_fixup(stack_base, imgp);
	if (error != 0)			if (error != 0)
	return (error);			return (error);

	/*			/*
	* On i386, the TCB is referred to by %gs:0. Reuse the empty			* On i386, the TCB is referred to by %gs:0. Reuse the empty
	* space normally used by the return address (args[0]) to store			* space normally used by the return address (args[0]) to store
	* a single element array, containing a pointer to the TCB. %gs			* a single element array, containing a pointer to the TCB. %gs
	* base will point to this.			* base will point to this.
	*			*
	* Also let the first argument of the entry point (args[1])			* Also let the first argument of the entry point (args[1])
	* refer to the auxiliary vector, which is stored right after			* refer to the auxiliary vector, which is stored right after
	* the TCB.			* the TCB.
	*/			*/
	args[0] = (uintptr_t)*stack_base;			args[0] = *stack_base;
	args[1] = (uintptr_t)*stack_base +			args[1] = *stack_base +
	roundup(sizeof(cloudabi32_tcb_t), sizeof(register_t));			roundup(sizeof(cloudabi32_tcb_t), sizeof(register_t));
	*stack_base -= howmany(sizeof(args), sizeof(register_t));			*stack_base -= roundup2(sizeof(args), sizeof(register_t));
	return (copyout(args, *stack_base, sizeof(args)));			return (copyout(args, (void )stack_base, sizeof(args)));
	}			}

	static void			static void
	cloudabi32_proc_setregs(struct thread td, struct image_params imgp,			cloudabi32_proc_setregs(struct thread td, struct image_params imgp,
	unsigned long stack)			uintptr_t stack)
	{			{

	ia32_setregs(td, imgp, stack);			ia32_setregs(td, imgp, stack);
	(void)cpu_set_user_tls(td, TO_PTR(stack));			(void)cpu_set_user_tls(td, TO_PTR(stack));
	}			}

	static int			static int
	cloudabi32_fetch_syscall_args(struct thread *td)			cloudabi32_fetch_syscall_args(struct thread *td)
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