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📄 autoconf.c(2.78 KB)
📄 bus_machdep.c(8.05 KB)
📄 bus_space_asm.S(8.08 KB)
📄 busdma_bounce.c(40.82 KB)
📄 busdma_machdep.c(7.46 KB)
📄 bzero.S(5.33 KB)
📄 clock.c(1.47 KB)
📄 copyinout.S(5.31 KB)
📄 cpu_errata.c(5.14 KB)
📄 cpufunc_asm.S(4.71 KB)
📄 db_disasm.c(2.26 KB)
📄 db_interface.c(5.33 KB)
📄 db_trace.c(3.3 KB)
📄 debug_monitor.c(14.85 KB)
📄 disassem.c(15.34 KB)
📄 dump_machdep.c(2.19 KB)
📄 efirt_machdep.c(7.31 KB)
📄 elf32_machdep.c(7.31 KB)
📄 elf_machdep.c(7.58 KB)
📄 exception.S(6.02 KB)
📄 freebsd32_machdep.c(11.11 KB)
📄 gdb_machdep.c(3.21 KB)
📄 genassym.c(3.45 KB)
📄 gic_v3.c(35.72 KB)
📄 gic_v3_acpi.c(10.84 KB)
📄 gic_v3_fdt.c(9.3 KB)
📄 gic_v3_reg.h(13.57 KB)
📄 gic_v3_var.h(3.96 KB)
📄 gicv3_its.c(51.37 KB)
📄 identcpu.c(51.79 KB)
📄 in_cksum.c(6.24 KB)
📄 locore.S(18.17 KB)
📄 machdep.c(33.05 KB)
📄 machdep_boot.c(6.13 KB)
📄 mem.c(3.48 KB)
📄 memcpy.S(6.71 KB)
📄 memmove.S(5.25 KB)
📄 minidump_machdep.c(10.08 KB)
📄 mp_machdep.c(19.43 KB)
📄 nexus.c(14.39 KB)
📄 ofw_machdep.c(1.9 KB)
📄 pmap.c(190.66 KB)
📄 stack_machdep.c(2.61 KB)
📄 support.S(6.38 KB)
📄 swtch.S(7.23 KB)
📄 sys_machdep.c(1.66 KB)
📄 trap.c(14.88 KB)
📄 uio_machdep.c(4.22 KB)
📄 uma_machdep.c(2.3 KB)
📄 undefined.c(4.63 KB)
📄 unwind.c(1.92 KB)
📄 vfp.c(9.92 KB)
📄 vm_machdep.c(7.35 KB)

Editing: support.S

/*-
 * Copyright (c) 2014 Andrew Turner
 * Copyright (c) 2014-2015 The FreeBSD Foundation
 * All rights reserved.
 *
 * Portions of this software were developed by Andrew Turner
 * under sponsorship from the FreeBSD Foundation
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include <machine/asm.h>
__FBSDID("$FreeBSD$");

#include <machine/setjmp.h>
#include <machine/param.h>
#include <machine/vmparam.h>

#include "assym.inc"

.macro check_user_access user_arg, limit, bad_addr_func
	ldr	x7, =(\limit)
	cmp	x\user_arg, x7
	b.cs	\bad_addr_func
.endm

/*
 * One of the fu* or su* functions failed, return -1.
 */
ENTRY(fsu_fault)
	SET_FAULT_HANDLER(xzr, x1)	/* Reset the handler function */
	EXIT_USER_ACCESS_CHECK(w0, x1)
fsu_fault_nopcb:
	mov	x0, #-1
	ret
END(fsu_fault)

/*
 * int casueword32(volatile uint32_t *, uint32_t, uint32_t *, uint32_t)
 */
ENTRY(casueword32)
	check_user_access 0, (VM_MAXUSER_ADDRESS-3), fsu_fault_nopcb
	adr	x6, fsu_fault		/* Load the fault handler */
	mov	w5, #1
	SET_FAULT_HANDLER(x6, x4)	/* And set it */
	ENTER_USER_ACCESS(w6, x4)
	ldxr	w4, [x0]		/* Load-exclusive the data */
	cmp	w4, w1			/* Compare */
	b.ne	1f			/* Not equal, exit */
	stxr	w5, w3, [x0]		/* Store the new data */
1:	EXIT_USER_ACCESS(w6)
	SET_FAULT_HANDLER(xzr, x6)	/* Reset the fault handler */
	str	w4, [x2]		/* Store the read data */
	mov	w0, w5			/* Result same as store status */
	ret				/* Return */
END(casueword32)

/*
 * int casueword(volatile u_long *, u_long, u_long *, u_long)
 */
ENTRY(casueword)
	check_user_access 0, (VM_MAXUSER_ADDRESS-7), fsu_fault_nopcb
	adr	x6, fsu_fault		/* Load the fault handler */
	mov	w5, #1
	SET_FAULT_HANDLER(x6, x4)	/* And set it */
	ENTER_USER_ACCESS(w6, x4)
	ldxr	x4, [x0]		/* Load-exclusive the data */
	cmp	x4, x1			/* Compare */
	b.ne	1f			/* Not equal, exit */
	stxr	w5, x3, [x0]		/* Store the new data */
1:	EXIT_USER_ACCESS(w6)
	SET_FAULT_HANDLER(xzr, x6)	/* Reset the fault handler */
	str	x4, [x2]		/* Store the read data */
	mov	w0, w5			/* Result same as store status */
	ret				/* Return */
END(casueword)

.macro fsudata insn, ret_reg, user_arg
	adr	x7, fsu_fault		/* Load the fault handler */
	SET_FAULT_HANDLER(x7, x6)	/* And set it */
	\insn	\ret_reg, [x\user_arg]	/* Try accessing the data */
	SET_FAULT_HANDLER(xzr, x6)	/* Reset the fault handler */
.endm

/*
 * int fubyte(volatile const void *)
 */
ENTRY(fubyte)
	check_user_access 0, (VM_MAXUSER_ADDRESS), fsu_fault_nopcb
	fsudata	ldtrb, w0, 0
	ret				/* Return */
END(fubyte)

/*
 * int fuword(volatile const void *)
 */
ENTRY(fuword16)
	check_user_access 0, (VM_MAXUSER_ADDRESS-1), fsu_fault_nopcb
	fsudata	ldtrh, w0, 0
	ret				/* Return */
END(fuword16)

/*
 * int32_t fueword32(volatile const void *, int32_t *)
 */
ENTRY(fueword32)
	check_user_access 0, (VM_MAXUSER_ADDRESS-3), fsu_fault_nopcb
	fsudata	ldtr, w0, 0
	str	w0, [x1]		/* Save the data in kernel space */
	mov	w0, #0			/* Success */
	ret				/* Return */
END(fueword32)

/*
 * long fueword(volatile const void *, int64_t *)
 * int64_t fueword64(volatile const void *, int64_t *)
 */
ENTRY(fueword)
EENTRY(fueword64)
	check_user_access 0, (VM_MAXUSER_ADDRESS-7), fsu_fault_nopcb
	fsudata	ldtr, x0, 0
	str	x0, [x1]		/* Save the data in kernel space */
	mov	x0, #0			/* Success */
	ret				/* Return */
EEND(fueword64)
END(fueword)

/*
 * int subyte(volatile void *, int)
 */
ENTRY(subyte)
	check_user_access 0, (VM_MAXUSER_ADDRESS), fsu_fault_nopcb
	fsudata	sttrb, w1, 0
	mov	x0, #0			/* Success */
	ret				/* Return */
END(subyte)

/*
 * int suword16(volatile void *, int)
 */
ENTRY(suword16)
	check_user_access 0, (VM_MAXUSER_ADDRESS-1), fsu_fault_nopcb
	fsudata	sttrh, w1, 0
	mov	x0, #0			/* Success */
	ret				/* Return */
END(suword16)

/*
 * int suword32(volatile void *, int)
 */
ENTRY(suword32)
	check_user_access 0, (VM_MAXUSER_ADDRESS-3), fsu_fault_nopcb
	fsudata	sttr, w1, 0
	mov	x0, #0			/* Success */
	ret				/* Return */
END(suword32)

/*
 * int suword(volatile void *, long)
 */
ENTRY(suword)
EENTRY(suword64)
	check_user_access 0, (VM_MAXUSER_ADDRESS-7), fsu_fault_nopcb
	fsudata	sttr, x1, 0
	mov	x0, #0			/* Success */
	ret				/* Return */
EEND(suword64)
END(suword)

ENTRY(setjmp)
	/* Store the stack pointer */
	mov	x8, sp
	str	x8, [x0], #8

/* Store the general purpose registers and lr */
	stp	x19, x20, [x0], #16
	stp	x21, x22, [x0], #16
	stp	x23, x24, [x0], #16
	stp	x25, x26, [x0], #16
	stp	x27, x28, [x0], #16
	stp	x29, lr, [x0], #16

/* Return value */
	mov	x0, #0
	ret
END(setjmp)

ENTRY(longjmp)
	/* Restore the stack pointer */
	ldr	x8, [x0], #8
	mov	sp, x8

/* Restore the general purpose registers and lr */
	ldp	x19, x20, [x0], #16
	ldp	x21, x22, [x0], #16
	ldp	x23, x24, [x0], #16
	ldp	x25, x26, [x0], #16
	ldp	x27, x28, [x0], #16
	ldp	x29, lr, [x0], #16

/* Load the return value */
	mov	x0, x1
	ret
END(longjmp)

/*
 * pagezero, simple implementation
 */
ENTRY(pagezero_simple)
	add	x1, x0, #PAGE_SIZE

1:
	stp	xzr, xzr, [x0], #0x10
	stp	xzr, xzr, [x0], #0x10
	stp	xzr, xzr, [x0], #0x10
	stp	xzr, xzr, [x0], #0x10
	cmp	x0, x1
	b.ne	1b
	ret

END(pagezero_simple)

/*
 * pagezero, cache assisted
 */
ENTRY(pagezero_cache)
	add	x1, x0, #PAGE_SIZE

ldr	x2, =dczva_line_size
	ldr	x2, [x2]

1:
	dc	zva, x0
	add	x0, x0, x2
	cmp	x0, x1
	b.ne	1b
	ret

END(pagezero_cache)

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Editing: support.S

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