Skip to content

Commit

Permalink
Convert ARM64 armasm to armclang
Browse files Browse the repository at this point in the history 
The armasm legacy assembler is deprecated. The code was migrated to the GNU syntax (used by armclang).
https://developer.arm.com/documentation/100068/0621/Migrating-from-armasm-to-the-armclang-Integrated-Assembler
  • Loading branch information
@Liryna
Liryna committed Jun 18, 2024
1 parent 7f20224 commit 0007bad
Show file tree
Hide file tree
Showing 3 changed files with 283 additions and 256 deletions.
184 changes: 96 additions & 88 deletions src/asm/jump_arm64_aapcs_pe_armclang.S
View file
Original file line number Diff line number Diff line change
@@ -1,133 +1,141 @@
; Copyright Edward Nevill + Oliver Kowalke 2015
; Distributed under the Boost Software License, Version 1.0.
; (See accompanying file LICENSE_1_0.txt or copy at
; http://www.boost.org/LICENSE_1_0.txt)

;*******************************************************
;* *
;* ------------------------------------------------- *
;* | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | *
;* ------------------------------------------------- *
;* | 0x0 | 0x4 | 0x8 | 0xc | 0x10| 0x14| 0x18| 0x1c| *
;* ------------------------------------------------- *
;* | d8 | d9 | d10 | d11 | *
;* ------------------------------------------------- *
;* ------------------------------------------------- *
;* | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
;* ------------------------------------------------- *
;* | 0x20| 0x24| 0x28| 0x2c| 0x30| 0x34| 0x38| 0x3c| *
;* ------------------------------------------------- *
;* | d12 | d13 | d14 | d15 | *
;* ------------------------------------------------- *
;* ------------------------------------------------- *
;* | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | *
;* ------------------------------------------------- *
;* | 0x40| 0x44| 0x48| 0x4c| 0x50| 0x54| 0x58| 0x5c| *
;* ------------------------------------------------- *
;* | x19 | x20 | x21 | x22 | *
;* ------------------------------------------------- *
;* ------------------------------------------------- *
;* | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | *
;* ------------------------------------------------- *
;* | 0x60| 0x64| 0x68| 0x6c| 0x70| 0x74| 0x78| 0x7c| *
;* ------------------------------------------------- *
;* | x23 | x24 | x25 | x26 | *
;* ------------------------------------------------- *
;* ------------------------------------------------- *
;* | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | *
;* ------------------------------------------------- *
;* | 0x80| 0x84| 0x88| 0x8c| 0x90| 0x94| 0x98| 0x9c| *
;* ------------------------------------------------- *
;* | x27 | x28 | FP | LR | *
;* ------------------------------------------------- *
;* ------------------------------------------------- *
;* | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | *
;* ------------------------------------------------- *
;* | 0xa0| 0xa4| 0xa8| 0xac| 0xb0| 0xb4| 0xb8| 0xbc| *
;* ------------------------------------------------- *
;* | fiber data| base | limit | dealloc | *
;* ------------------------------------------------- *
;* ------------------------------------------------- *
;* | 48 | 49 | 50 | 51 | | | *
;* ------------------------------------------------- *
;* | 0xc0| 0xc4| 0xc8| 0xcc| | | *
;* ------------------------------------------------- *
;* | PC | align | | | *
;* ------------------------------------------------- *
;* *
;*******************************************************

AREA |.text|, CODE, READONLY, ALIGN=4, CODEALIGN
EXPORT jump_fcontext

jump_fcontext proc
; prepare stack for GP + FPU
/*
Copyright Edward Nevill + Oliver Kowalke 2015
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE_1_0.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
*/

/******************************************************
* *
* ------------------------------------------------- *
* | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | *
* ------------------------------------------------- *
* | 0x0 | 0x4 | 0x8 | 0xc | 0x10| 0x14| 0x18| 0x1c| *
* ------------------------------------------------- *
* | d8 | d9 | d10 | d11 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
* ------------------------------------------------- *
* | 0x20| 0x24| 0x28| 0x2c| 0x30| 0x34| 0x38| 0x3c| *
* ------------------------------------------------- *
* | d12 | d13 | d14 | d15 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | *
* ------------------------------------------------- *
* | 0x40| 0x44| 0x48| 0x4c| 0x50| 0x54| 0x58| 0x5c| *
* ------------------------------------------------- *
* | x19 | x20 | x21 | x22 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | *
* ------------------------------------------------- *
* | 0x60| 0x64| 0x68| 0x6c| 0x70| 0x74| 0x78| 0x7c| *
* ------------------------------------------------- *
* | x23 | x24 | x25 | x26 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | *
* ------------------------------------------------- *
* | 0x80| 0x84| 0x88| 0x8c| 0x90| 0x94| 0x98| 0x9c| *
* ------------------------------------------------- *
* | x27 | x28 | FP | LR | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | *
* ------------------------------------------------- *
* | 0xa0| 0xa4| 0xa8| 0xac| 0xb0| 0xb4| 0xb8| 0xbc| *
* ------------------------------------------------- *
* | fiber data| base | limit | dealloc | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 48 | 49 | 50 | 51 | | | *
* ------------------------------------------------- *
* | 0xc0| 0xc4| 0xc8| 0xcc| | | *
* ------------------------------------------------- *
* | PC | align | | | *
* ------------------------------------------------- *
* *
*******************************************************/

.file "jump_arm64_aapcs_pe_armclang.S"
.text
.balign 4

.def jump_fcontext; .scl 2; .type 32; .endef
.seh_proc jump_fcontext
jump_fcontext:
.seh_endprologue
// prepare stack for GP + FPU
sub sp, sp, #0xd0

; save d8 - d15
// save d8 - d15
stp d8, d9, [sp, #0x00]
stp d10, d11, [sp, #0x10]
stp d12, d13, [sp, #0x20]
stp d14, d15, [sp, #0x30]

; save x19-x30
// save x19-x30
stp x19, x20, [sp, #0x40]
stp x21, x22, [sp, #0x50]
stp x23, x24, [sp, #0x60]
stp x25, x26, [sp, #0x70]
stp x27, x28, [sp, #0x80]
stp x29, x30, [sp, #0x90]

; save LR as PC
// save LR as PC
str x30, [sp, #0xc0]

; save current stack base and limit
ldp x5, x6, [x18, #0x08] ; TeStackBase and TeStackLimit at ksarm64.h
// save current stack base and limit
ldp x5, x6, [x18, #0x08] // TeStackBase and TeStackLimit at ksarm64.h
stp x5, x6, [sp, #0xa0]
; save current fiber data and deallocation stack
ldr x5, [x18, #0x1478] ; TeDeallocationStack at ksarm64.h
ldr x6, [x18, #0x20] ; TeFiberData at ksarm64.h
// save current fiber data and deallocation stack
ldr x5, [x18, #0x1478] // TeDeallocationStack at ksarm64.h
ldr x6, [x18, #0x20] // TeFiberData at ksarm64.h
stp x5, x6, [sp, #0xb0]

; store RSP (pointing to context-data) in X0
// store RSP (pointing to context-data) in X0
mov x4, sp

; restore RSP (pointing to context-data) from X1
// restore RSP (pointing to context-data) from X1
mov sp, x0

; restore stack base and limit
// restore stack base and limit
ldp x5, x6, [sp, #0xa0]
stp x5, x6, [x18, #0x08] ; TeStackBase and TeStackLimit at ksarm64.h
; restore fiber data and deallocation stack
stp x5, x6, [x18, #0x08] // TeStackBase and TeStackLimit at ksarm64.h
// restore fiber data and deallocation stack
ldp x5, x6, [sp, #0xb0]
str x5, [x18, #0x1478] ; TeDeallocationStack at ksarm64.h
str x6, [x18, #0x20] ; TeFiberData at ksarm64.h
str x5, [x18, #0x1478] // TeDeallocationStack at ksarm64.h
str x6, [x18, #0x20] // TeFiberData at ksarm64.h

; load d8 - d15
// load d8 - d15
ldp d8, d9, [sp, #0x00]
ldp d10, d11, [sp, #0x10]
ldp d12, d13, [sp, #0x20]
ldp d14, d15, [sp, #0x30]

; load x19-x30
// load x19-x30
ldp x19, x20, [sp, #0x40]
ldp x21, x22, [sp, #0x50]
ldp x23, x24, [sp, #0x60]
ldp x25, x26, [sp, #0x70]
ldp x27, x28, [sp, #0x80]
ldp x29, x30, [sp, #0x90]

; return transfer_t from jump
; pass transfer_t as first arg in context function
; X0 == FCTX, X1 == DATA
// return transfer_t from jump
// pass transfer_t as first arg in context function
// X0 == FCTX, X1 == DATA
mov x0, x4

; load pc
// load pc
ldr x4, [sp, #0xc0]

; restore stack from GP + FPU
// restore stack from GP + FPU
add sp, sp, #0xd0

ret x4
ENDP
END
.seh_endproc

.section .drectve
.ascii " -export:\"jump_fcontext\""
Loading

0 comments on commit 0007bad

Please sign in to comment.