forked from ariadne/libucontext
aarch64: modernize
parent
b04da78fb8
commit
fb27ad693b
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@ -1,8 +1,11 @@
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#ifndef __ARCH_AARCH64_DEFS_H
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#define __ARCH_AARCH64_DEFS_H
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#define REGSZ 8
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#define R0_OFFSET 184
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#define REG_SZ (8)
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#define MCONTEXT_GREGS (184)
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#define R0_OFFSET REG_OFFSET(0)
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#define SP_OFFSET 432
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#define PC_OFFSET 440
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#define PSTATE_OFFSET 448
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@ -15,4 +18,6 @@
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# define ESR_MAGIC 0x45535201
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#endif
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#include "common-defs.h"
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#endif
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2018 Ariadne Conill <ariadne@dereferenced.org>
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* Copyright (c) 2018, 2020 Ariadne Conill <ariadne@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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@ -12,27 +12,28 @@
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#include "defs.h"
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.globl __getcontext;
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__getcontext:
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str xzr, [x0, #R0_OFFSET + (0 * REGSZ)]
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ALIAS(getcontext, __getcontext)
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FUNC(__getcontext)
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str xzr, [x0, #REG_OFFSET(0)]
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/* save GPRs */
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stp x0, x1, [x0, #R0_OFFSET + (0 * REGSZ)]
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stp x2, x3, [x0, #R0_OFFSET + (2 * REGSZ)]
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stp x4, x5, [x0, #R0_OFFSET + (4 * REGSZ)]
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stp x6, x7, [x0, #R0_OFFSET + (6 * REGSZ)]
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stp x8, x9, [x0, #R0_OFFSET + (8 * REGSZ)]
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stp x10, x11, [x0, #R0_OFFSET + (10 * REGSZ)]
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stp x12, x13, [x0, #R0_OFFSET + (12 * REGSZ)]
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stp x14, x15, [x0, #R0_OFFSET + (14 * REGSZ)]
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stp x16, x17, [x0, #R0_OFFSET + (16 * REGSZ)]
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stp x18, x19, [x0, #R0_OFFSET + (18 * REGSZ)]
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stp x20, x21, [x0, #R0_OFFSET + (20 * REGSZ)]
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stp x22, x23, [x0, #R0_OFFSET + (22 * REGSZ)]
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stp x24, x25, [x0, #R0_OFFSET + (24 * REGSZ)]
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stp x26, x27, [x0, #R0_OFFSET + (26 * REGSZ)]
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stp x28, x29, [x0, #R0_OFFSET + (28 * REGSZ)]
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str x30, [x0, #R0_OFFSET + (30 * REGSZ)]
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stp x0, x1, [x0, #REG_OFFSET(0)]
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stp x2, x3, [x0, #REG_OFFSET(2)]
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stp x4, x5, [x0, #REG_OFFSET(4)]
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stp x6, x7, [x0, #REG_OFFSET(6)]
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stp x8, x9, [x0, #REG_OFFSET(8)]
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stp x10, x11, [x0, #REG_OFFSET(10)]
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stp x12, x13, [x0, #REG_OFFSET(12)]
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stp x14, x15, [x0, #REG_OFFSET(14)]
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stp x16, x17, [x0, #REG_OFFSET(16)]
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stp x18, x19, [x0, #REG_OFFSET(18)]
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stp x20, x21, [x0, #REG_OFFSET(20)]
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stp x22, x23, [x0, #REG_OFFSET(22)]
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stp x24, x25, [x0, #REG_OFFSET(24)]
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stp x26, x27, [x0, #REG_OFFSET(26)]
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stp x28, x29, [x0, #REG_OFFSET(28)]
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str x30, [x0, #REG_OFFSET(30)]
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/* save current program counter in link register */
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str x30, [x0, #PC_OFFSET]
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@ -48,7 +49,4 @@ __getcontext:
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mov x0, #0
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ret
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.weak getcontext;
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getcontext = __getcontext;
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END(__getcontext)
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2018 Ariadne Conill <ariadne@dereferenced.org>
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* Copyright (c) 2018, 2020 Ariadne Conill <ariadne@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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@ -12,16 +12,17 @@
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#include "defs.h"
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.globl __setcontext;
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__setcontext:
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ALIAS(setcontext, __setcontext)
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FUNC(__setcontext)
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/* restore GPRs */
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ldp x18, x19, [x0, #R0_OFFSET + (18 * REGSZ)]
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ldp x20, x21, [x0, #R0_OFFSET + (20 * REGSZ)]
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ldp x22, x23, [x0, #R0_OFFSET + (22 * REGSZ)]
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ldp x24, x25, [x0, #R0_OFFSET + (24 * REGSZ)]
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ldp x26, x27, [x0, #R0_OFFSET + (26 * REGSZ)]
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ldp x28, x29, [x0, #R0_OFFSET + (28 * REGSZ)]
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ldr x30, [x0, #R0_OFFSET + (30 * REGSZ)]
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ldp x18, x19, [x0, #REG_OFFSET(18)]
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ldp x20, x21, [x0, #REG_OFFSET(20)]
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ldp x22, x23, [x0, #REG_OFFSET(22)]
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ldp x24, x25, [x0, #REG_OFFSET(24)]
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ldp x26, x27, [x0, #REG_OFFSET(26)]
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ldp x28, x29, [x0, #REG_OFFSET(28)]
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ldr x30, [x0, #REG_OFFSET(30)]
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/* save current stack pointer */
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ldr x2, [x0, #SP_OFFSET]
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@ -33,15 +34,11 @@ __setcontext:
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ldr x16, [x0, #PC_OFFSET]
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/* restore args */
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ldp x2, x3, [x0, #R0_OFFSET + (2 * REGSZ)]
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ldp x4, x5, [x0, #R0_OFFSET + (4 * REGSZ)]
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ldp x6, x7, [x0, #R0_OFFSET + (6 * REGSZ)]
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ldp x0, x1, [x0, #R0_OFFSET + (0 * REGSZ)]
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ldp x2, x3, [x0, #REG_OFFSET(2)]
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ldp x4, x5, [x0, #REG_OFFSET(4)]
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ldp x6, x7, [x0, #REG_OFFSET(6)]
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ldp x0, x1, [x0, #REG_OFFSET(0)]
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/* jump to new PC */
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br x16
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.weak setcontext;
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setcontext = __setcontext;
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END(__setcontext)
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@ -10,11 +10,13 @@
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* from the use of this software.
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*/
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.globl __start_context;
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__start_context:
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#include "defs.h"
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FUNC(__start_context)
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/* get the proper context into position and test for NULL */
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mov x0, x19
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cbnz x0, __setcontext
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/* something went wrong, exit */
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b exit
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END(__start_context)
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@ -12,26 +12,27 @@
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#include "defs.h"
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.globl __swapcontext;
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__swapcontext:
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str xzr, [x0, #R0_OFFSET + (0 * REGSZ)]
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ALIAS(swapcontext, __swapcontext)
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FUNC(__swapcontext)
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str xzr, [x0, #REG_OFFSET(0)]
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/* save GPRs */
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stp x2, x3, [x0, #R0_OFFSET + (2 * REGSZ)]
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stp x4, x5, [x0, #R0_OFFSET + (4 * REGSZ)]
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stp x6, x7, [x0, #R0_OFFSET + (6 * REGSZ)]
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stp x8, x9, [x0, #R0_OFFSET + (8 * REGSZ)]
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stp x10, x11, [x0, #R0_OFFSET + (10 * REGSZ)]
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stp x12, x13, [x0, #R0_OFFSET + (12 * REGSZ)]
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stp x14, x15, [x0, #R0_OFFSET + (14 * REGSZ)]
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stp x16, x17, [x0, #R0_OFFSET + (16 * REGSZ)]
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stp x18, x19, [x0, #R0_OFFSET + (18 * REGSZ)]
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stp x20, x21, [x0, #R0_OFFSET + (20 * REGSZ)]
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stp x22, x23, [x0, #R0_OFFSET + (22 * REGSZ)]
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stp x24, x25, [x0, #R0_OFFSET + (24 * REGSZ)]
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stp x26, x27, [x0, #R0_OFFSET + (26 * REGSZ)]
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stp x28, x29, [x0, #R0_OFFSET + (28 * REGSZ)]
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str x30, [x0, #R0_OFFSET + (30 * REGSZ)]
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stp x2, x3, [x0, #REG_OFFSET(2)]
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stp x4, x5, [x0, #REG_OFFSET(4)]
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stp x6, x7, [x0, #REG_OFFSET(6)]
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stp x8, x9, [x0, #REG_OFFSET(8)]
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stp x10, x11, [x0, #REG_OFFSET(10)]
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stp x12, x13, [x0, #REG_OFFSET(12)]
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stp x14, x15, [x0, #REG_OFFSET(14)]
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stp x16, x17, [x0, #REG_OFFSET(16)]
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stp x18, x19, [x0, #REG_OFFSET(18)]
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stp x20, x21, [x0, #REG_OFFSET(20)]
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stp x22, x23, [x0, #REG_OFFSET(22)]
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stp x24, x25, [x0, #REG_OFFSET(24)]
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stp x26, x27, [x0, #REG_OFFSET(26)]
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stp x28, x29, [x0, #REG_OFFSET(28)]
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str x30, [x0, #REG_OFFSET(30)]
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/* save current program counter in link register */
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str x30, [x0, #PC_OFFSET]
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@ -54,8 +55,4 @@ __swapcontext:
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/* hmm, we came back here try to return */
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mov x30, x28
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ret
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.weak swapcontext;
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swapcontext = __swapcontext;
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END(__swapcontext)
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