ariadne
/
libucontext
1
1
Fork 1
Code Issues 2 Pull Requests 1 Projects Releases Wiki Activity

aarch64: modernize

pull/17/head
Ariadne Conill 2020-03-30 04:37:20 +00:00
parent b04da78fb8
commit fb27ad693b
5 changed files with 69 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/aarch64/defs.h
View File

@ -1,8 +1,11 @@
#ifndef __ARCH_AARCH64_DEFS_H #ifndef __ARCH_AARCH64_DEFS_H
#define __ARCH_AARCH64_DEFS_H #define __ARCH_AARCH64_DEFS_H
#define REGSZ 8 #define REG_SZ (8)
#define R0_OFFSET 184 #define MCONTEXT_GREGS (184)
#define R0_OFFSET REG_OFFSET(0)
#define SP_OFFSET 432 #define SP_OFFSET 432
#define PC_OFFSET 440 #define PC_OFFSET 440
#define PSTATE_OFFSET 448 #define PSTATE_OFFSET 448
@ -15,4 +18,6 @@
# define ESR_MAGIC 0x45535201 # define ESR_MAGIC 0x45535201
#endif #endif
#include "common-defs.h"
#endif #endif

46
arch/aarch64/getcontext.S
View File

@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2018 Ariadne Conill <ariadne@dereferenced.org> * Copyright (c) 2018, 2020 Ariadne Conill <ariadne@dereferenced.org>
* *
* Permission to use, copy, modify, and/or distribute this software for any * Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above * purpose with or without fee is hereby granted, provided that the above
@ -12,27 +12,28 @@
#include "defs.h" #include "defs.h"
.globl __getcontext; ALIAS(getcontext, __getcontext)
__getcontext:
str xzr, [x0, #R0_OFFSET + (0 * REGSZ)] FUNC(__getcontext)
str xzr, [x0, #REG_OFFSET(0)]
/* save GPRs */ /* save GPRs */
stp x0, x1, [x0, #R0_OFFSET + (0 * REGSZ)] stp x0, x1, [x0, #REG_OFFSET(0)]
stp x2, x3, [x0, #R0_OFFSET + (2 * REGSZ)] stp x2, x3, [x0, #REG_OFFSET(2)]
stp x4, x5, [x0, #R0_OFFSET + (4 * REGSZ)] stp x4, x5, [x0, #REG_OFFSET(4)]
stp x6, x7, [x0, #R0_OFFSET + (6 * REGSZ)] stp x6, x7, [x0, #REG_OFFSET(6)]
stp x8, x9, [x0, #R0_OFFSET + (8 * REGSZ)] stp x8, x9, [x0, #REG_OFFSET(8)]
stp x10, x11, [x0, #R0_OFFSET + (10 * REGSZ)] stp x10, x11, [x0, #REG_OFFSET(10)]
stp x12, x13, [x0, #R0_OFFSET + (12 * REGSZ)] stp x12, x13, [x0, #REG_OFFSET(12)]
stp x14, x15, [x0, #R0_OFFSET + (14 * REGSZ)] stp x14, x15, [x0, #REG_OFFSET(14)]
stp x16, x17, [x0, #R0_OFFSET + (16 * REGSZ)] stp x16, x17, [x0, #REG_OFFSET(16)]
stp x18, x19, [x0, #R0_OFFSET + (18 * REGSZ)] stp x18, x19, [x0, #REG_OFFSET(18)]
stp x20, x21, [x0, #R0_OFFSET + (20 * REGSZ)] stp x20, x21, [x0, #REG_OFFSET(20)]
stp x22, x23, [x0, #R0_OFFSET + (22 * REGSZ)] stp x22, x23, [x0, #REG_OFFSET(22)]
stp x24, x25, [x0, #R0_OFFSET + (24 * REGSZ)] stp x24, x25, [x0, #REG_OFFSET(24)]
stp x26, x27, [x0, #R0_OFFSET + (26 * REGSZ)] stp x26, x27, [x0, #REG_OFFSET(26)]
stp x28, x29, [x0, #R0_OFFSET + (28 * REGSZ)] stp x28, x29, [x0, #REG_OFFSET(28)]
str x30, [x0, #R0_OFFSET + (30 * REGSZ)] str x30, [x0, #REG_OFFSET(30)]
/* save current program counter in link register */ /* save current program counter in link register */
str x30, [x0, #PC_OFFSET] str x30, [x0, #PC_OFFSET]
@ -48,7 +49,4 @@ __getcontext:
mov x0, #0 mov x0, #0
ret ret
END(__getcontext)
.weak getcontext;
getcontext = __getcontext;

35
arch/aarch64/setcontext.S
View File

@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2018 Ariadne Conill <ariadne@dereferenced.org> * Copyright (c) 2018, 2020 Ariadne Conill <ariadne@dereferenced.org>
* *
* Permission to use, copy, modify, and/or distribute this software for any * Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above * purpose with or without fee is hereby granted, provided that the above
@ -12,16 +12,17 @@
#include "defs.h" #include "defs.h"
.globl __setcontext; ALIAS(setcontext, __setcontext)
__setcontext:
FUNC(__setcontext)
/* restore GPRs */ /* restore GPRs */
ldp x18, x19, [x0, #R0_OFFSET + (18 * REGSZ)] ldp x18, x19, [x0, #REG_OFFSET(18)]
ldp x20, x21, [x0, #R0_OFFSET + (20 * REGSZ)] ldp x20, x21, [x0, #REG_OFFSET(20)]
ldp x22, x23, [x0, #R0_OFFSET + (22 * REGSZ)] ldp x22, x23, [x0, #REG_OFFSET(22)]
ldp x24, x25, [x0, #R0_OFFSET + (24 * REGSZ)] ldp x24, x25, [x0, #REG_OFFSET(24)]
ldp x26, x27, [x0, #R0_OFFSET + (26 * REGSZ)] ldp x26, x27, [x0, #REG_OFFSET(26)]
ldp x28, x29, [x0, #R0_OFFSET + (28 * REGSZ)] ldp x28, x29, [x0, #REG_OFFSET(28)]
ldr x30, [x0, #R0_OFFSET + (30 * REGSZ)] ldr x30, [x0, #REG_OFFSET(30)]
/* save current stack pointer */ /* save current stack pointer */
ldr x2, [x0, #SP_OFFSET] ldr x2, [x0, #SP_OFFSET]
@ -33,15 +34,11 @@ __setcontext:
ldr x16, [x0, #PC_OFFSET] ldr x16, [x0, #PC_OFFSET]
/* restore args */ /* restore args */
ldp x2, x3, [x0, #R0_OFFSET + (2 * REGSZ)] ldp x2, x3, [x0, #REG_OFFSET(2)]
ldp x4, x5, [x0, #R0_OFFSET + (4 * REGSZ)] ldp x4, x5, [x0, #REG_OFFSET(4)]
ldp x6, x7, [x0, #R0_OFFSET + (6 * REGSZ)] ldp x6, x7, [x0, #REG_OFFSET(6)]
ldp x0, x1, [x0, #R0_OFFSET + (0 * REGSZ)] ldp x0, x1, [x0, #REG_OFFSET(0)]
/* jump to new PC */ /* jump to new PC */
br x16 br x16
END(__setcontext)
.weak setcontext;
setcontext = __setcontext;

6
arch/aarch64/startcontext.S
View File

@ -10,11 +10,13 @@
* from the use of this software. * from the use of this software.
*/ */
.globl __start_context; #include "defs.h"
__start_context:
FUNC(__start_context)
/* get the proper context into position and test for NULL */ /* get the proper context into position and test for NULL */
mov x0, x19 mov x0, x19
cbnz x0, __setcontext cbnz x0, __setcontext
/* something went wrong, exit */ /* something went wrong, exit */
b exit b exit
END(__start_context)

43
arch/aarch64/swapcontext.S
View File

@ -12,26 +12,27 @@
#include "defs.h" #include "defs.h"
.globl __swapcontext; ALIAS(swapcontext, __swapcontext)
__swapcontext:
str xzr, [x0, #R0_OFFSET + (0 * REGSZ)] FUNC(__swapcontext)
str xzr, [x0, #REG_OFFSET(0)]
/* save GPRs */ /* save GPRs */
stp x2, x3, [x0, #R0_OFFSET + (2 * REGSZ)] stp x2, x3, [x0, #REG_OFFSET(2)]
stp x4, x5, [x0, #R0_OFFSET + (4 * REGSZ)] stp x4, x5, [x0, #REG_OFFSET(4)]
stp x6, x7, [x0, #R0_OFFSET + (6 * REGSZ)] stp x6, x7, [x0, #REG_OFFSET(6)]
stp x8, x9, [x0, #R0_OFFSET + (8 * REGSZ)] stp x8, x9, [x0, #REG_OFFSET(8)]
stp x10, x11, [x0, #R0_OFFSET + (10 * REGSZ)] stp x10, x11, [x0, #REG_OFFSET(10)]
stp x12, x13, [x0, #R0_OFFSET + (12 * REGSZ)] stp x12, x13, [x0, #REG_OFFSET(12)]
stp x14, x15, [x0, #R0_OFFSET + (14 * REGSZ)] stp x14, x15, [x0, #REG_OFFSET(14)]
stp x16, x17, [x0, #R0_OFFSET + (16 * REGSZ)] stp x16, x17, [x0, #REG_OFFSET(16)]
stp x18, x19, [x0, #R0_OFFSET + (18 * REGSZ)] stp x18, x19, [x0, #REG_OFFSET(18)]
stp x20, x21, [x0, #R0_OFFSET + (20 * REGSZ)] stp x20, x21, [x0, #REG_OFFSET(20)]
stp x22, x23, [x0, #R0_OFFSET + (22 * REGSZ)] stp x22, x23, [x0, #REG_OFFSET(22)]
stp x24, x25, [x0, #R0_OFFSET + (24 * REGSZ)] stp x24, x25, [x0, #REG_OFFSET(24)]
stp x26, x27, [x0, #R0_OFFSET + (26 * REGSZ)] stp x26, x27, [x0, #REG_OFFSET(26)]
stp x28, x29, [x0, #R0_OFFSET + (28 * REGSZ)] stp x28, x29, [x0, #REG_OFFSET(28)]
str x30, [x0, #R0_OFFSET + (30 * REGSZ)] str x30, [x0, #REG_OFFSET(30)]
/* save current program counter in link register */ /* save current program counter in link register */
str x30, [x0, #PC_OFFSET] str x30, [x0, #PC_OFFSET]
@ -54,8 +55,4 @@ __swapcontext:
/* hmm, we came back here try to return */ /* hmm, we came back here try to return */
mov x30, x28 mov x30, x28
ret ret
END(__swapcontext)
.weak swapcontext;
swapcontext = __swapcontext;