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Align stack on 16-byte boundary for native calls in the JIT compiler (bug 5601, r=dvander).

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This alignment is needed if a native calls a library function on OS X or uses SSE instructions.


Former-commit-id: fc08daf58b
This commit is contained in:
Scott Ehlert 2013-02-24 01:03:55 -06:00
parent e5c92a2c30
commit 2a6486b78f
1 changed files with 48 additions and 20 deletions
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68
amxmodx/amxjitsn.asm
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@ -90,6 +90,9 @@
; Revision History
; ----------------
; 24 february 2013 by Scott Ehlert
; Aligned stack to 16-byte boundary for native calls in case they make library
; calls on Mac OS X or use SSE instructions.
; 16 august 2005 by David "BAILOPAN" Anderson (DA)
; Changed JIT to not swap stack pointer during execution. This
; is playing with fire, especially with pthreads and signals on linux,
@ -303,6 +306,22 @@
%endif
%endmacro
%macro _STK_ALIGN 1 ; align stack to 16-byte boundary and
; allocate %1 bytes of stack space
%if %1 % 16 != 0
%error "expected 16-byte aligned value"
%endif
push edi
mov edi, esp
and esp, 0xFFFFFFF0
sub esp, %1
%endmacro
%macro _STK_RESTORE 0 ; restore stack pointer after 16-byte alignment
mov esp, edi
pop edi
%endmacro
global asm_runJIT, _asm_runJIT
global amx_exec_jit, _amx_exec_jit
global getMaxCodeSize, _getMaxCodeSize
@ -2238,8 +2257,10 @@ err_divide:
jmp _return_popstack
JIT_OP_SYSREQ:
push ecx
push esi
_STK_ALIGN 32 ; align stack to 16-byte boundary and
; allocate 32 bytes of stack space
mov [esp+16], ecx
mov [esp+12], esi
mov ebp,amx ; get amx into EBP
sub esi,edi ; correct STK
@ -2254,14 +2275,15 @@ JIT_OP_SYSREQ:
lea ebx,pri ; 3rd param: addr. of retval
;Our original esi is still pushed!
push ebx
push eax ; 2nd param: function number
push ebp ; 1st param: amx
mov [esp+08], ebx
mov [esp+04], eax ; 2nd param: function number
mov [esp], ebp ; 1st param: amx
call [ebp+_callback]
_DROPARGS 12 ; remove args from stack
pop esi
pop ecx
mov esi, [esp+12] ; restore esi
mov ecx, [esp+16] ; restore ecx
_STK_RESTORE ; restore stack pointer
cmp eax,AMX_ERR_NONE
jne _return_popstack
.continue:
@ -2273,8 +2295,10 @@ JIT_OP_SYSREQ:
JIT_OP_SYSREQ_D: ; (TR)
push ecx
push esi
_STK_ALIGN 16 ; align stack to 16-byte boundary and
; allocate 16 bytes of stack space
mov [esp+08], ecx
mov [esp+04], esi
mov ebp,amx ; get amx into EBP
sub esi,edi ; correct STK
@ -2287,11 +2311,12 @@ JIT_OP_SYSREQ_D: ; (TR)
mov [ebp+_frm],eax ; eax & ecx are invalid by now
;esi is still pushed!
push ebp ; 1st param: amx
mov [esp], ebp ; 1st param: amx
call ebx ; direct call
_DROPARGS 8 ; remove args from stack
pop ecx
mov ecx, [esp+08] ; restore ecx
_STK_RESTORE ; restore stack pointer
mov ebp,amx ; get amx into EBP
cmp dword [ebp+_error],AMX_ERR_NONE
jne _return_popstack; return error code, if any
@ -2305,8 +2330,10 @@ JIT_OP_SYSREQ_D: ; (TR)
JIT_OP_BREAK:
%ifdef DEBUGSUPPORT
push ecx
push esi
_STK_ALIGN 16 ; align stack to 16-byte boundary and
; allocate 16 bytes of stack space
mov [esp+08], ecx
mov [esp+04], esi
mov ebp,amx ; get amx into EBP
sub esi,edi ; correct STK
@ -2320,12 +2347,13 @@ JIT_OP_BREAK:
mov [ebp+_frm],ebx ; EBX & ECX are invalid by now
;??? storing CIP is not very useful, because the code changed (during JIT compile)
push ebp ; 1st param: amx
mov [esp], ebp ; 1st param: amx
call [ebp+_debug]
_DROPARGS 4 ; remove args from stack
pop esi
pop ecx
mov esi, [esp+04] ; restore esi
mov ecx, [esp+08] ; restore ecx
_STK_RESTORE ; restore stack pointer
cmp eax,AMX_ERR_NONE
jne _return_popstack; return error code, if any