jak-project/game/kernel/asm_funcs.asm
water111 f9d8fcd6e4
[decomp] add mips2c converter (#842)
* mips 2 c basic version, not yet tested

* calling works without crashing, but the function doesn't

* it works

* add test

* cleanup and actually add the test

* dont use mips2c by default for font

* clean up formatting
2021-09-11 20:52:35 -04:00

511 lines
9.9 KiB
NASM

;;;;;;;;;;;;;;;;;;;;
;; asm_funcs.nasm ;;
;;;;;;;;;;;;;;;;;;;;
;; GOAL Runtime assembly functions. These exist only in the x86 version of GOAL.
SECTION .text
;; Call C++ code on linux, from GOAL, using Linux calling convention.
global _arg_call_linux
_arg_call_linux:
pop rax
push r10
push r11
sub rsp, 8
; xmm stuff
sub rsp, 128
movaps [rsp], xmm8
movaps [rsp + 16], xmm9
movaps [rsp + 32], xmm10
movaps [rsp + 48], xmm11
movaps [rsp + 64], xmm12
movaps [rsp + 80], xmm13
movaps [rsp + 96], xmm14
movaps [rsp + 112], xmm15
call rax
movaps xmm8, [rsp]
movaps xmm9, [rsp + 16]
movaps xmm10, [rsp + 32]
movaps xmm11, [rsp + 48]
movaps xmm12, [rsp + 64]
movaps xmm13, [rsp + 80]
movaps xmm14, [rsp + 96]
movaps xmm15, [rsp + 112]
add rsp, 128
add rsp, 8
pop r11
pop r10
ret
;; Call C++ code on linux, from GOAL. Pug arguments on the stack and put a pointer to this array in the first arg.
;; this function pushes all 8 OpenGOAL registers into a stack array.
;; then it calls the function pointed to by rax with a pointer to this array.
;; it returns the return value of the called function.
global _stack_call_linux
_stack_call_linux:
pop rax
; align stack
sub rsp, 8
sub rsp, 128
movaps [rsp], xmm8
movaps [rsp + 16], xmm9
movaps [rsp + 32], xmm10
movaps [rsp + 48], xmm11
movaps [rsp + 64], xmm12
movaps [rsp + 80], xmm13
movaps [rsp + 96], xmm14
movaps [rsp + 112], xmm15
; create stack array of arguments
push r11
push r10
push r9
push r8
push rcx
push rdx
push rsi
push rdi
; set first argument
mov rdi, rsp
; call function
call rax
; restore arguments (probably don't need to really do this...)
pop rdi
pop rsi
pop rdx
pop rcx
pop r8
pop r9
pop r10
pop r11
movaps xmm8, [rsp]
movaps xmm9, [rsp + 16]
movaps xmm10, [rsp + 32]
movaps xmm11, [rsp + 48]
movaps xmm12, [rsp + 64]
movaps xmm13, [rsp + 80]
movaps xmm14, [rsp + 96]
movaps xmm15, [rsp + 112]
add rsp, 128
; restore stack
add rsp, 8
; return!
ret
;; Call c++ code through mips2c.
;; GOAL will call a dynamically generated trampoline.
;; The trampoline will have pushed the exec function and stack offset onto the stack
global _mips2c_call_linux
_mips2c_call_linux:
;; grab the address to call and put it in xmm0
sub rsp, 8
movaps xmm0, [rsp + 16]
;; grab the stack offset
mov rax, [rsp + 8]
;; first, save xmms
sub rsp, 128
movaps [rsp], xmm8
movaps [rsp + 16], xmm9
movaps [rsp + 32], xmm10
movaps [rsp + 48], xmm11
movaps [rsp + 64], xmm12
movaps [rsp + 80], xmm13
movaps [rsp + 96], xmm14
movaps [rsp + 112], xmm15
push r10
push r11
;; oof
sub rsp, 1280
mov [rsp + 64], rdi ;; arg0
mov [rsp + 80], rsi ;; arg1
mov [rsp + 96], rdx ;; arg2
mov [rsp + 112], rcx ;; arg3
mov [rsp + 128], r8 ;; arg4
mov [rsp + 144], r9 ;; arg5
mov [rsp + 160], r10 ;; arg6
mov [rsp + 176], r11 ;; arg7
mov [rsp + 464], rsp ;; mip2c code's MIPS stack
mov rdi, rsp
sub rsp, rax ;; allocate space on the stack for GOAL fake stack
push rax ;; and remember this so we can find our way back
push rax
movq rax, xmm0
call rax ;; call!
;; unallocate
pop rax
pop rax
add rsp, rax
mov rax, [rsp + 32]
add rsp, 1280
pop r11
pop r10
movaps xmm8, [rsp]
movaps xmm9, [rsp + 16]
movaps xmm10, [rsp + 32]
movaps xmm11, [rsp + 48]
movaps xmm12, [rsp + 64]
movaps xmm13, [rsp + 80]
movaps xmm14, [rsp + 96]
movaps xmm15, [rsp + 112]
add rsp, 152 ;; 128 for xmm's + 16 for the stuff pushed by trampoline + 8 for stack alignment undo
ret
global _mips2c_call_windows
_mips2c_call_windows:
;; grab the address to call and put it in xmm0
sub rsp, 8
movaps xmm0, [rsp + 16]
;; grab the stack offset
mov rax, [rsp + 8]
;; first, save xmms
sub rsp, 128
movaps [rsp], xmm8
movaps [rsp + 16], xmm9
movaps [rsp + 32], xmm10
movaps [rsp + 48], xmm11
movaps [rsp + 64], xmm12
movaps [rsp + 80], xmm13
movaps [rsp + 96], xmm14
movaps [rsp + 112], xmm15
push r10
push r11
;; oof
sub rsp, 1280
mov [rsp + 64], rdi ;; arg0
mov [rsp + 80], rsi ;; arg1
mov [rsp + 96], rdx ;; arg2
mov [rsp + 112], rcx ;; arg3
mov [rsp + 128], r8 ;; arg4
mov [rsp + 144], r9 ;; arg5
mov [rsp + 160], r10 ;; arg6
mov [rsp + 176], r11 ;; arg7
mov [rsp + 464], rsp ;; mip2c code's MIPS stack
mov rcx, rsp
sub rsp, rax ;; allocate space on the stack for GOAL fake stack
push rax ;; and remember this so we can find our way back
push rax
movq rax, xmm0
sub rsp, 32
call rax ;; call!
add rsp, 32
;; unallocate
pop rax
pop rax
add rsp, rax
mov rax, [rsp + 32]
add rsp, 1280
pop r11
pop r10
movaps xmm8, [rsp]
movaps xmm9, [rsp + 16]
movaps xmm10, [rsp + 32]
movaps xmm11, [rsp + 48]
movaps xmm12, [rsp + 64]
movaps xmm13, [rsp + 80]
movaps xmm14, [rsp + 96]
movaps xmm15, [rsp + 112]
add rsp, 152 ;; 128 for xmm's + 16 for the stuff pushed by trampoline + 8 for stack alignment undo
ret
;; Call C++ code on windows, from GOAL. Pug arguments on the stack and put a pointer to this array in the first arg.
global _stack_call_win32
_stack_call_win32:
pop rax
; to make sure the stack frame is aligned
sub rsp, 8
sub rsp, 128
movaps [rsp], xmm8
movaps [rsp + 16], xmm9
movaps [rsp + 32], xmm10
movaps [rsp + 48], xmm11
movaps [rsp + 64], xmm12
movaps [rsp + 80], xmm13
movaps [rsp + 96], xmm14
movaps [rsp + 112], xmm15
; push all registers and create the register array on the stack
push r11
push r10
push r9
push r8
push rcx
push rdx
push rsi
push rdi
; set the first argument register to the stack argument array
mov rcx, rsp
sub rsp, 32
; call C function to do format, result will go in RAX
call rax
add rsp, 32
; restore
; (note - this could probably just be add rsp 72, we don't care about the value of these register)
pop rdi
pop rsi
pop rdx
pop rcx
pop r8
pop r9
pop r10
pop r11
movaps xmm8, [rsp]
movaps xmm9, [rsp + 16]
movaps xmm10, [rsp + 32]
movaps xmm11, [rsp + 48]
movaps xmm12, [rsp + 64]
movaps xmm13, [rsp + 80]
movaps xmm14, [rsp + 96]
movaps xmm15, [rsp + 112]
add rsp, 128
add rsp, 8
ret
;; The _call_goal_asm function is used to call a GOAL function from C.
;; It calls on the parent stack, which is a bad idea if your stack is not already a GOAL stack.
;; It supports up to 3 arguments and a return value.
;; This should be called with the arguments:
;; - first goal arg
;; - second goal arg
;; - third goal arg
;; - address of function to call
;; - address of the symbol table
;; - GOAL memory space offset
global _call_goal_asm_linux
_call_goal_asm_linux:
;; x86 saved registers we need to modify for GOAL should be saved
push r13
push r14
push r15
;; RDI - first arg
;; RSI - second arg
;; RDX - third arg
;; RCX - function pointer (goes in r13)
;; R8 - st (goes in r14)
;; R9 - off (goes in r15)
;; set GOAL function pointer
mov r13, rcx
;; offset
mov r14, r8
;; symbol table
mov r15, r9
;; call GOAL by function pointer
call r13
;; retore x86 registers.
pop r15
pop r14
pop r13
ret
;; Call goal, but switch stacks.
global _call_goal_on_stack_asm_linux
_call_goal_on_stack_asm_linux:
;; RDI - stack pointer
;; RSI - unused
;; RDX - unused
;; RCX - function pointer (goes in r13)
;; R8 - st (goes in r14)
;; R9 - off (goes in r15)
;; x86 saved registers we need to modify for GOAL should be saved
push r13
push r14
push r15
;; stash current stack pointer in rsi
mov rsi, rsp
;; switch to new stack
mov rsp, rdi
;; back up old stack pointer
push rsi
;; set GOAL function pointer
mov r13, rcx
;; offset
mov r14, r8
;; symbol table
mov r15, r9
;; call GOAL by function pointer
call r13
;; get old stack pointer
pop rsi
mov rsp, rsi
;; retore x86 registers.
pop r15
pop r14
pop r13
ret
;; The _call_goal_asm function is used to call a GOAL function from C.
;; It supports up to 3 arguments and a return value.
;; This should be called with the arguments:
;; - first goal arg
;; - second goal arg
;; - third goal arg
;; - address of function to call
;; - address of the symbol table
;; - GOAL memory space offset
global _call_goal_asm_win32
_call_goal_asm_win32:
push rdx ; 8
push rbx ; 16
push rbp ; 24
push rsi ; 32
push rdi ; 40
push r8 ; 48
push r9 ; 56
push r10 ; 64
push r11 ; 72
push r12 ; 80
push r13 ; 88
push r14 ; 96
push r15 ; 104
sub rsp, 16
movups [rsp], xmm6
sub rsp, 16
movups [rsp], xmm7
mov rdi, rcx ;; rdi is GOAL first argument, rcx is windows first argument
mov rsi, rdx ;; rsi is GOAL second argument, rdx is windows second argument
mov rdx, r8 ;; rdx is GOAL third argument, r8 is windows third argument
mov r13, r9 ;; r13 is GOAL fp, r9 is windows fourth argument
mov r15, [rsp + 184] ;; symbol table
mov r14, [rsp + 176] ;; offset
call r13
movups xmm7, [rsp]
add rsp, 16
movups xmm6, [rsp]
add rsp, 16
pop r15
pop r14
pop r13
pop r12
pop r11
pop r10
pop r9
pop r8
pop rdi
pop rsi
pop rbp
pop rbx
pop rdx
ret
global _call_goal_on_stack_asm_win32
_call_goal_on_stack_asm_win32:
;; arg0 (rcx) stack
;; arg1 (rdx) fp
;; arg2 (r8) st
;; arg3 (r9) off
push rdx ; 8
push rbx ; 16
push rbp ; 24
push rsi ; 32
push rdi ; 40
push r8 ; 48
push r9 ; 56
push r10 ; 64
push r11 ; 72
push r12 ; 80
push r13 ; 88
push r14 ; 96
push r15 ; 104
sub rsp, 16
movups [rsp], xmm6
sub rsp, 16
movups [rsp], xmm7
;; stack swap
mov rsi, rsp
mov rsp, rcx
push rsi
mov r13, rdx ;; fp
mov r14, r8 ;; st
mov r15, r9 ;; offset
call r13
;; restore stack
pop rsi
mov rsp, rsi
movups xmm7, [rsp]
add rsp, 16
movups xmm6, [rsp]
add rsp, 16
pop r15
pop r14
pop r13
pop r12
pop r11
pop r10
pop r9
pop r8
pop rdi
pop rsi
pop rbp
pop rbx
pop rdx
ret