diff --git a/sys/arm64/include/asm.h b/sys/arm64/include/asm.h index 443377bf0c14..b6a18cf8a7e4 100644 --- a/sys/arm64/include/asm.h +++ b/sys/arm64/include/asm.h @@ -1,106 +1,109 @@ /*- * Copyright (c) 2014 Andrew Turner * All rights reserved. * * 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. * * $FreeBSD$ */ #ifndef _MACHINE_ASM_H_ #define _MACHINE_ASM_H_ #undef __FBSDID #if !defined(lint) && !defined(STRIP_FBSDID) #define __FBSDID(s) .ident s #else #define __FBSDID(s) /* nothing */ #endif #define _C_LABEL(x) x -#define ENTRY(sym) \ - .text; .globl sym; .align 2; .type sym,#function; sym: \ +#define LENTRY(sym) \ + .text; .align 2; .type sym,#function; sym: \ .cfi_startproc +#define ENTRY(sym) \ + .globl sym; LENTRY(sym) #define EENTRY(sym) \ .globl sym; sym: -#define END(sym) .cfi_endproc; .size sym, . - sym +#define LEND(sym) .cfi_endproc; .size sym, . - sym +#define END(sym) LEND(sym) #define EEND(sym) #define WEAK_REFERENCE(sym, alias) \ .weak alias; \ .set alias,sym #define UINT64_C(x) (x) #if defined(PIC) #define PIC_SYM(x,y) x ## @ ## y #else #define PIC_SYM(x,y) x #endif /* Alias for link register x30 */ #define lr x30 /* * Sets the trap fault handler. The exception handler will return to the * address in the handler register on a data abort or the xzr register to * clear the handler. The tmp parameter should be a register able to hold * the temporary data. */ #define SET_FAULT_HANDLER(handler, tmp) \ ldr tmp, [x18, #PC_CURTHREAD]; /* Load curthread */ \ ldr tmp, [tmp, #TD_PCB]; /* Load the pcb */ \ str handler, [tmp, #PCB_ONFAULT] /* Set the handler */ #define ENTER_USER_ACCESS(reg, tmp) \ ldr tmp, =has_pan; /* Get the addr of has_pan */ \ ldr reg, [tmp]; /* Read it */ \ cbz reg, 997f; /* If no PAN skip */ \ .inst 0xd500409f | (0 << 8); /* Clear PAN */ \ 997: #define EXIT_USER_ACCESS(reg) \ cbz reg, 998f; /* If no PAN skip */ \ .inst 0xd500409f | (1 << 8); /* Set PAN */ \ 998: #define EXIT_USER_ACCESS_CHECK(reg, tmp) \ ldr tmp, =has_pan; /* Get the addr of has_pan */ \ ldr reg, [tmp]; /* Read it */ \ cbz reg, 999f; /* If no PAN skip */ \ .inst 0xd500409f | (1 << 8); /* Set PAN */ \ 999: /* * Some AArch64 CPUs speculate past an eret instruction. As the user may * control the registers at this point add a speculation barrier usable on * all AArch64 CPUs after the eret instruction. * TODO: ARMv8.5 adds a specific instruction for this, we could use that * if we know we are running on something that supports it. */ #define ERET \ eret; \ dsb sy; \ isb #endif /* _MACHINE_ASM_H_ */