JIT's OP_CALL now supports a debug hook

This commit is contained in:
David Anderson 2004-09-16 20:08:11 +00:00
parent ec5f944c03
commit 2f1de39dd3
2 changed files with 78 additions and 9 deletions

View File

@ -42,6 +42,12 @@
; Revision History
;------------------
; 16 September 2004 by David "BAILOPAN" Anderson
; Implemented a compile time toggleable debug hook on OP_CALL and OP_RET.
; NOTE: JIT has not had debug hooks since 1999.
; 8 September 2004 by David "BAILOPAN" Anderson
; Changed OP_LINE call to be compile-time toggle-able between compiling
; line ops or not.
; 29 June 2004 by G.W.M. Vissers
; Translated the thing into NASM. The actual generation of the code is
; put into the data section because the code modifies itself whereas the
@ -147,8 +153,14 @@ _dbgcode: resd 1
_dbgaddr: resd 1
_dbgparam: resd 1
_dbgname: resd 1
_usertags: resd 4 ; 4 = AMX_USERNUM (#define'd in amx.h)
_userdata: resd 4 ; 4 = AMX_USERNUM (#define'd in amx.h)
_usertags1: resd 1 ; 4 = AMX_USERNUM (#define'd in amx.h)
_usertags2: resd 1 ; 4 = AMX_USERNUM (#define'd in amx.h)
_usertags3: resd 1 ; 4 = AMX_USERNUM (#define'd in amx.h)
_usertags4: resd 1 ; 4 = AMX_USERNUM (#define'd in amx.h)
_userdata1: resd 1 ; 4 = AMX_USERNUM (#define'd in amx.h)
_userdata2: resd 1 ; 4 = AMX_USERNUM (#define'd in amx.h)
_userdata3: resd 1 ; 4 = AMX_USERNUM (#define'd in amx.h)
_userdata4: resd 1 ; 4 = AMX_USERNUM (#define'd in amx.h)
_error: resd 1
_pri: resd 1
_alt: resd 1
@ -1049,13 +1061,64 @@ OP_RETN:
;good
OP_CALL:
;nop;
RELOC 1
GO_ON j_call, OP_CALL_I, 8
;save registers
push eax
push ebp
;get .amx flags
mov ebp,[amxhead]
mov eax,[ebp+_h_flags]
;check to see if the flag has line ops
and eax,AMX_FLAG_DEBUG
cmp eax,AMX_FLAG_DEBUG
;restore registers
pop ebp
pop eax
;if so, skip down to debug compiler
jmp _go_jit_debug
_go_jit_nodebug:
RELOC 1
GO_ON j_call_nodebug, _j_call_go_on, 8
j_call_nodebug:
call 12345678h
CHECKCODESIZE j_call_nodebug
_j_call_go_on:
jmp _opcall_end
_go_jit_debug:
;thanks to Julien "dJeyL" Laurent for code relocation explanation
RELOC _go_jit_reloc-j_call+1
GO_ON j_call, OP_CALL_I, 8
j_call:
;call 12345678h ; tasm chokes on this out of a sudden
db 0e8h, 0, 0, 0, 0
; save some registers
push ebp
push eax
push edx
; get AMX
mov ebp,amx
; get debug call pointer
mov eax,[ebp+_userdata2]
; check to see if it's valid
mov edx, dword 0
cmp eax,edx
je _go_jit_skip_call
xchg esp,esi ;switch to caller stack
push 2 ;param mode=2, push
push ebp ;param amx
call eax ;indirect call
add esp, 8 ;restore stack
xchg esp,esi ;return to AMX stack
mov ebp,amx ;restore AMX [necessary?]
_go_jit_skip_call:
;restore original registers
pop edx
pop eax
pop ebp
_go_jit_reloc:
call 12345678h
CHECKCODESIZE j_call
_opcall_end:
OP_CALL_I:
;nop;
@ -2223,7 +2286,6 @@ JIT_OP_LINE:
pop eax
jmp ecx ; jump back
JIT_OP_SWITCH:
pop ebp ; pop return address = table address
mov ecx,[ebp] ; ECX = number of records
@ -2241,6 +2303,12 @@ JIT_OP_SWITCH:
jmp ebp
%endif
JIT_DEBUG:
push eax
pop eax
ret
; The caller of asm_runJIT() can determine the maximum size of the compiled
; code by multiplying the result of this function by the number of opcodes in
@ -2288,6 +2356,7 @@ jit_sysreq DD JIT_OP_SYSREQ
jit_sysreq_d DD JIT_OP_SYSREQ_D
jit_line DD JIT_OP_LINE
jit_switch DD JIT_OP_SWITCH
jit_debug DD JIT_DEBUG
;
; The table for the browser/relocator function.

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