// SPDX-License-Identifier: GPL-2.0-only // Copyright (C) 2015-2019 ARM Limited. // Original author: Dave Martin <Dave.Martin@arm.com> #ifndef ASSEMBLER_H #define ASSEMBLER_H .macro __for from:req, to:req .if (\from) == (\to) _for__body %\from .else __for \from, %(\from) + ((\to) - (\from)) / 2 __for %(\from) + ((\to) - (\from)) / 2 + 1, \to .endif .endm .macro _for var:req, from:req, to:req, insn:vararg .macro _for__body \var:req .noaltmacro \insn .altmacro .endm .altmacro __for \from, \to .noaltmacro .purgem _for__body .endm .macro function name .macro endfunction .type \name, @function .purgem endfunction .endm \name: .endm .macro define_accessor name, num, insn .macro \name\()_entry n \insn \n, 1 ret .endm function \name adr x2, .L__accessor_tbl\@ add x2, x2, x0, lsl #3 br x2 .L__accessor_tbl\@: _for x, 0, (\num) - 1, \name\()_entry \x endfunction .purgem \name\()_entry .endm // Utility macro to print a literal string // Clobbers x0-x4,x8 .macro puts string .pushsection .rodata.str1.1, "aMS", @progbits, 1 .L__puts_literal\@: .string "\string" .popsection ldr x0, =.L__puts_literal\@ bl puts .endm #define PR_SET_SHADOW_STACK_STATUS 75 # define PR_SHADOW_STACK_ENABLE (1UL << 0) .macro enable_gcs // Run with GCS mov x0, PR_SET_SHADOW_STACK_STATUS mov x1, PR_SHADOW_STACK_ENABLE mov x2, xzr mov x3, xzr mov x4, xzr mov x5, xzr mov x8, #__NR_prctl svc #0 .endm #endif /* ! ASSEMBLER_H */