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kristjanvalurkristjanvalur
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renormalize line endings
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‎src/platforms/switch_x64_msvc.asm‎

Lines changed: 134 additions & 134 deletions
Original file line numberDiff line numberDiff line change
@@ -1,135 +1,135 @@
1-
;
2-
; stack switching code for MASM on x64
3-
; Kristjan Valur Jonsson, apr 2011
4-
; Modified for stackman, dec 2019
5-
; Added stackman_call, dec 2020
6-
;
7-
8-
include macamd64.inc
9-
10-
pop_reg MACRO reg
11-
pop reg
12-
ENDM
13-
14-
load_xmm128 macro Reg, Offset
15-
movdqa Reg, Offset[rsp]
16-
endm
17-
18-
.code
19-
20-
;arguments callback, context, are passed in rcx, rdx, respectively
21-
;stackman_switch PROC FRAME
22-
NESTED_ENTRY stackman_switch, _TEXT$00
23-
; save all registers that the x64 ABI specifies as non-volatile.
24-
; This includes some mmx registers. May not always be necessary,
25-
; unless our application is doing 3D, but better safe than sorry.
26-
alloc_stack 168; 10 * 16 bytes, plus 8 bytes to make stack 16 byte aligned
27-
save_xmm128 xmm15, 144
28-
save_xmm128 xmm14, 128
29-
save_xmm128 xmm13, 112
30-
save_xmm128 xmm12, 96
31-
save_xmm128 xmm11, 80
32-
save_xmm128 xmm10, 64
33-
save_xmm128 xmm9, 48
34-
save_xmm128 xmm8, 32
35-
save_xmm128 xmm7, 16
36-
save_xmm128 xmm6, 0
37-
38-
push_reg r15
39-
push_reg r14
40-
push_reg r13
41-
push_reg r12
42-
43-
push_reg rbp
44-
push_reg rbx
45-
push_reg rdi
46-
push_reg rsi
47-
48-
sub rsp, 20h ;allocate shadow stack space for callee arguments
49-
.allocstack 20h
50-
.endprolog
51-
52-
;save argments in nonvolatile registers
53-
mov r12, rcx ;callback
54-
mov r13, rdx ;context
55-
56-
; load stack base that we are saving minus the callee argument
57-
; shadow stack. We don't want that clobbered
58-
mov rcx, r13 ;arg1, context
59-
mov rdx, 0 ;arg2, opcode STACKMAN_OP_SAVE
60-
lea r8, [rsp+20h] ;arg3, stack pointer
61-
mov rbx, rsp; ; keep old stack pointer
62-
call r12 ;
63-
64-
;actual stack switch (and re-allocating the shadow stack):
65-
lea rsp, [rax-20h]
66-
;re-adjust base pointer
67-
sub rbx, rsp;
68-
sub rbp, rbx;
69-
70-
mov rcx, r13 ;arg1, context
71-
mov rdx, 1 ;arg2, opcode STACKMAN_OP_RESTORE
72-
mov r8, rax ;arg3, new stack pointer
73-
call r12
74-
;return the rax
75-
76-
add rsp, 20h
77-
pop_reg rsi
78-
pop_reg rdi
79-
pop_reg rbx
80-
pop_reg rbp
81-
82-
pop_reg r12
83-
pop_reg r13
84-
pop_reg r14
85-
pop_reg r15
86-
87-
load_xmm128 xmm15, 144
88-
load_xmm128 xmm14, 128
89-
load_xmm128 xmm13, 112
90-
load_xmm128 xmm12, 96
91-
load_xmm128 xmm11, 80
92-
load_xmm128 xmm10, 64
93-
load_xmm128 xmm9, 48
94-
load_xmm128 xmm8, 32
95-
load_xmm128 xmm7, 16
96-
load_xmm128 xmm6, 0
97-
add rsp, 168
98-
ret
99-
100-
NESTED_END stackman_switch, _TEXT$00
101-
;stackman_switch ENDP
102-
103-
; based on template from https://docs.microsoft.com/en-us/cpp/build/exception-handling-x64?view=msvc-160
104-
stackman_call PROC FRAME
105-
push rbp
106-
.pushreg rbp
107-
; now our stack is 16 byte aligned. don't need additional spacle
108-
;sub rsp, 040h
109-
;.allocstack 040h
110-
lea rbp, [rsp+00h]
111-
.setframe rbp, 00h
112-
.endprolog
113-
114-
; suffle arguments into volatile registers
115-
mov rax, rcx ; callback
116-
mov rcx, rdx ; context into first arg
117-
mov r9, r8 ; and stack pointer in volatile registers
118-
119-
; set up call
120-
mov r8, rsp
121-
mov edx, 2
122-
; rcx already set up with context
123-
124-
; modify stack pointer before call
125-
mov rsp, r9
126-
sub rsp, 32 ;pre-allocate parameter stack for the callee
127-
call rax
128-
129-
; officialepilog
130-
lea rsp, [rbp+0h]
131-
pop rbp
132-
ret 0
133-
stackman_call ENDP
134-
1+
;
2+
; stack switching code for MASM on x64
3+
; Kristjan Valur Jonsson, apr 2011
4+
; Modified for stackman, dec 2019
5+
; Added stackman_call, dec 2020
6+
;
7+
8+
include macamd64.inc
9+
10+
pop_reg MACRO reg
11+
pop reg
12+
ENDM
13+
14+
load_xmm128 macro Reg, Offset
15+
movdqa Reg, Offset[rsp]
16+
endm
17+
18+
.code
19+
20+
;arguments callback, context, are passed in rcx, rdx, respectively
21+
;stackman_switch PROC FRAME
22+
NESTED_ENTRY stackman_switch, _TEXT$00
23+
; save all registers that the x64 ABI specifies as non-volatile.
24+
; This includes some mmx registers. May not always be necessary,
25+
; unless our application is doing 3D, but better safe than sorry.
26+
alloc_stack 168; 10 * 16 bytes, plus 8 bytes to make stack 16 byte aligned
27+
save_xmm128 xmm15, 144
28+
save_xmm128 xmm14, 128
29+
save_xmm128 xmm13, 112
30+
save_xmm128 xmm12, 96
31+
save_xmm128 xmm11, 80
32+
save_xmm128 xmm10, 64
33+
save_xmm128 xmm9, 48
34+
save_xmm128 xmm8, 32
35+
save_xmm128 xmm7, 16
36+
save_xmm128 xmm6, 0
37+
38+
push_reg r15
39+
push_reg r14
40+
push_reg r13
41+
push_reg r12
42+
43+
push_reg rbp
44+
push_reg rbx
45+
push_reg rdi
46+
push_reg rsi
47+
48+
sub rsp, 20h ;allocate shadow stack space for callee arguments
49+
.allocstack 20h
50+
.endprolog
51+
52+
;save argments in nonvolatile registers
53+
mov r12, rcx ;callback
54+
mov r13, rdx ;context
55+
56+
; load stack base that we are saving minus the callee argument
57+
; shadow stack. We don't want that clobbered
58+
mov rcx, r13 ;arg1, context
59+
mov rdx, 0 ;arg2, opcode STACKMAN_OP_SAVE
60+
lea r8, [rsp+20h] ;arg3, stack pointer
61+
mov rbx, rsp; ; keep old stack pointer
62+
call r12 ;
63+
64+
;actual stack switch (and re-allocating the shadow stack):
65+
lea rsp, [rax-20h]
66+
;re-adjust base pointer
67+
sub rbx, rsp;
68+
sub rbp, rbx;
69+
70+
mov rcx, r13 ;arg1, context
71+
mov rdx, 1 ;arg2, opcode STACKMAN_OP_RESTORE
72+
mov r8, rax ;arg3, new stack pointer
73+
call r12
74+
;return the rax
75+
76+
add rsp, 20h
77+
pop_reg rsi
78+
pop_reg rdi
79+
pop_reg rbx
80+
pop_reg rbp
81+
82+
pop_reg r12
83+
pop_reg r13
84+
pop_reg r14
85+
pop_reg r15
86+
87+
load_xmm128 xmm15, 144
88+
load_xmm128 xmm14, 128
89+
load_xmm128 xmm13, 112
90+
load_xmm128 xmm12, 96
91+
load_xmm128 xmm11, 80
92+
load_xmm128 xmm10, 64
93+
load_xmm128 xmm9, 48
94+
load_xmm128 xmm8, 32
95+
load_xmm128 xmm7, 16
96+
load_xmm128 xmm6, 0
97+
add rsp, 168
98+
ret
99+
100+
NESTED_END stackman_switch, _TEXT$00
101+
;stackman_switch ENDP
102+
103+
; based on template from https://docs.microsoft.com/en-us/cpp/build/exception-handling-x64?view=msvc-160
104+
stackman_call PROC FRAME
105+
push rbp
106+
.pushreg rbp
107+
; now our stack is 16 byte aligned. don't need additional spacle
108+
;sub rsp, 040h
109+
;.allocstack 040h
110+
lea rbp, [rsp+00h]
111+
.setframe rbp, 00h
112+
.endprolog
113+
114+
; suffle arguments into volatile registers
115+
mov rax, rcx ; callback
116+
mov rcx, rdx ; context into first arg
117+
mov r9, r8 ; and stack pointer in volatile registers
118+
119+
; set up call
120+
mov r8, rsp
121+
mov edx, 2
122+
; rcx already set up with context
123+
124+
; modify stack pointer before call
125+
mov rsp, r9
126+
sub rsp, 32 ;pre-allocate parameter stack for the callee
127+
call rax
128+
129+
; officialepilog
130+
lea rsp, [rbp+0h]
131+
pop rbp
132+
ret 0
133+
stackman_call ENDP
134+
135135
END

‎src/platforms/switch_x64_msvc.h‎

Lines changed: 8 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -1,8 +1,8 @@
1-
/* The actual stack saving function, which just stores the stack,
2-
* this declared in an .asm file
3-
*/
4-
#ifndef STACKMAN_ASSEMBLY_SRC
5-
#define STACKMAN_ASSEMBLY_SRC switch_x64_msvc.asm
6-
#define STACKMAN_HAVE_CALL 1
7-
#define STACKMAN_STACK_ALIGN 16
8-
#endif
1+
/* The actual stack saving function, which just stores the stack,
2+
* this declared in an .asm file
3+
*/
4+
#ifndef STACKMAN_ASSEMBLY_SRC
5+
#define STACKMAN_ASSEMBLY_SRC switch_x64_msvc.asm
6+
#define STACKMAN_HAVE_CALL 1
7+
#define STACKMAN_STACK_ALIGN 16
8+
#endif

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