Mercurial > pub > dyncall > dyncall
changeset 619:c754150fe87f
- x64 win disas example fix and addition
| author | Tassilo Philipp |
|---|---|
| date | Mon, 03 Oct 2022 13:49:19 +0200 |
| parents | f1810b5dbb3b |
| children | 14c582c828b9 |
| files | doc/disas_examples/x64.win.disas |
| diffstat | 1 files changed, 184 insertions(+), 7 deletions(-) [+] |
line wrap: on
line diff
--- a/doc/disas_examples/x64.win.disas Mon Oct 03 11:40:36 2022 +0200 +++ b/doc/disas_examples/x64.win.disas Mon Oct 03 13:49:19 2022 +0200 @@ -82,7 +82,7 @@ -; ---------- structs by value, struct in first call on reg arg boundary ----------> +; ---------- structs by value, struct never in reg or on reg arg boundary ----------> ; ; struct A { int i, j; long long l; }; ; @@ -132,12 +132,12 @@ mov DWORD PTR [rsp+8], ecx push rsi push rdi - sub rsp, 312 ; 00000138H - mov BYTE PTR x$[rsp], 76 ; 0000004cH + sub rsp, 312 + mov BYTE PTR x$[rsp], 76 lea rax, QWORD PTR x$[rsp+1] mov rdi, rax xor eax, eax - mov ecx, 219 ; 000000dbH + mov ecx, 219 rep stosb lea rax, QWORD PTR $T1[rsp] mov rdi, rax @@ -155,7 +155,7 @@ mov edx, DWORD PTR c$[rsp] mov ecx, DWORD PTR b$[rsp] call leaf_call - add rsp, 312 ; 00000138H + add rsp, 312 pop rdi pop rsi ret 0 @@ -166,7 +166,7 @@ main PROC push rsi push rdi - sub rsp, 104 ; 00000068H + sub rsp, 104 mov DWORD PTR a$[rsp], 5 mov DWORD PTR a$[rsp+4], 6 mov QWORD PTR a$[rsp+8], 7 @@ -187,7 +187,7 @@ xor ecx, ecx call nonleaf_call xor eax, eax - add rsp, 104 ; 00000068H + add rsp, 104 pop rdi pop rsi ret 0 @@ -584,5 +584,182 @@ +; ---------- structs by value, struct passed as vararg ----------> +; +; #include <stdlib.h> +; #include <stdarg.h> +; +; struct A { int i, j; long long l; }; +; +; void leaf_call(int b, int c, int d, int e, ...) +; { +; } +; +; void nonleaf_call(int a, int b, int c, ...) +; { +; int d, e, g, h; +; struct A f; +; va_list ap; +; va_start(ap, c); +; d = va_arg(ap, int); +; e = va_arg(ap, int); +; f = va_arg(ap, struct A); +; g = va_arg(ap, int); +; h = va_arg(ap, int); +; /* use some local data */ +; *(char*)alloca(220) = 'L'; +; leaf_call(b, c, d, e, f, g, h); +; va_end(ap); +; } +; +; int main() +; { +; nonleaf_call(0, 1, 2, 3, 4, (struct A){5, 6, 7ll}, 8, 9); +; return 0; +; } + + + +; output from godbolt compiler explorer w/ msvc 19.0 + +leaf_call PROC + mov DWORD PTR [rsp+32], r9d ; + mov DWORD PTR [rsp+24], r8d ; + mov DWORD PTR [rsp+16], edx ; + mov DWORD PTR [rsp+8], ecx ; + ret 0 ; +leaf_call ENDP + +ap$ = 64 +h$ = 72 +g$ = 76 +e$ = 80 +d$ = 84 +$T1 = 96 +f$ = 112 +__$ArrayPad$ = 128 +b$ = 184 +c$ = 192 +nonleaf_call PROC +$LN3: + mov DWORD PTR [rsp+24], r8d ; + mov DWORD PTR [rsp+16], edx ; + mov DWORD PTR [rsp+8], ecx ; + mov QWORD PTR [rsp+32], r9 ; + push rsi ; + push rdi ; + sub rsp, 152 ; + mov rax, QWORD PTR __security_cookie ; + xor rax, rsp ; + mov QWORD PTR __$ArrayPad$[rsp], rax ; + lea rax, QWORD PTR c$[rsp+8] ; + mov QWORD PTR ap$[rsp], rax ; + mov rax, QWORD PTR ap$[rsp] ; + add rax, 8 ; + mov QWORD PTR ap$[rsp], rax ; + mov rax, QWORD PTR ap$[rsp] ; + mov eax, DWORD PTR [rax-8] ; + mov DWORD PTR d$[rsp], eax ; + mov rax, QWORD PTR ap$[rsp] ; + add rax, 8 ; + mov QWORD PTR ap$[rsp], rax ; + mov rax, QWORD PTR ap$[rsp] ; + mov eax, DWORD PTR [rax-8] ; + mov DWORD PTR e$[rsp], eax ; + mov rax, QWORD PTR ap$[rsp] ; + add rax, 8 ; + mov QWORD PTR ap$[rsp], rax ; + mov rax, QWORD PTR ap$[rsp] ; + mov rax, QWORD PTR [rax-8] ; + lea rcx, QWORD PTR f$[rsp] ; + mov rdi, rcx ; + mov rsi, rax ; + mov ecx, 16 ; + rep movsb ; + mov rax, QWORD PTR ap$[rsp] ; + add rax, 8 ; + mov QWORD PTR ap$[rsp], rax ; + mov rax, QWORD PTR ap$[rsp] ; + mov eax, DWORD PTR [rax-8] ; + mov DWORD PTR g$[rsp], eax ; + mov rax, QWORD PTR ap$[rsp] ; + add rax, 8 ; + mov QWORD PTR ap$[rsp], rax ; + mov rax, QWORD PTR ap$[rsp] ; + mov eax, DWORD PTR [rax-8] ; + mov DWORD PTR h$[rsp], eax ; + mov ecx, 220 ; + call alloca ; + cdqe ; + mov BYTE PTR [rax], 76 ; + lea rax, QWORD PTR $T1[rsp] ; + lea rcx, QWORD PTR f$[rsp] ; + mov rdi, rax ; + mov rsi, rcx ; + mov ecx, 16 ; + rep movsb ; + mov eax, DWORD PTR h$[rsp] ; + mov DWORD PTR [rsp+48], eax ; + mov eax, DWORD PTR g$[rsp] ; + mov DWORD PTR [rsp+40], eax ; + lea rax, QWORD PTR $T1[rsp] ; + mov QWORD PTR [rsp+32], rax ; + mov r9d, DWORD PTR e$[rsp] ; + mov r8d, DWORD PTR d$[rsp] ; + mov edx, DWORD PTR c$[rsp] ; + mov ecx, DWORD PTR b$[rsp] ; + call leaf_call ; + mov QWORD PTR ap$[rsp], 0 ; + mov rcx, QWORD PTR __$ArrayPad$[rsp] ; + xor rcx, rsp ; + call __security_check_cookie ; + add rsp, 152 ; + pop rdi ; + pop rsi ; + ret 0 ; +nonleaf_call ENDP + +$T1 = 64 +$S1$ = 80 +__$ArrayPad$ = 96 +main PROC +$LN3: + push rsi ; + push rdi ; + sub rsp, 120 ; + mov rax, QWORD PTR __security_cookie ; + xor rax, rsp ; + mov QWORD PTR __$ArrayPad$[rsp], rax ; + mov DWORD PTR $S1$[rsp], 5 ; + mov DWORD PTR $S1$[rsp+4], 6 ; + mov QWORD PTR $S1$[rsp+8], 7 ; + lea rax, QWORD PTR $T1[rsp] ; + lea rcx, QWORD PTR $S1$[rsp] ; + mov rdi, rax ; + mov rsi, rcx ; + mov ecx, 16 ; + rep movsb ; + mov DWORD PTR [rsp+56], 9 ; + mov DWORD PTR [rsp+48], 8 ; + lea rax, QWORD PTR $T1[rsp] ; + mov QWORD PTR [rsp+40], rax ; + mov DWORD PTR [rsp+32], 4 ; + mov r9d, 3 ; + mov r8d, 2 ; + mov edx, 1 ; + xor ecx, ecx ; + call nonleaf_call ; + xor eax, eax ; + mov rcx, QWORD PTR __$ArrayPad$[rsp] ; + xor rcx, rsp ; + call __security_check_cookie ; + add rsp, 120 ; + pop rdi ; + pop rsi ; + ret 0 ; +main ENDP + + + ; vim: ft=asm