Major build system changes

[tpg/acess2.git] / Usermode / Libraries / ld-acess.so_src / arch / armv7.S.h

diff --git a/Usermode/Libraries/ld-acess.so_src/arch/armv7.S.h b/Usermode/Libraries/ld-acess.so_src/arch/armv7.S.h
new file mode 100644 (file)
index 0000000..75c56d8
--- /dev/null
+++ b/Usermode/Libraries/ld-acess.so_src/arch/armv7.S.h
@@ -0,0 +1,79 @@
+//
+// Acess2 ARMv7 - System Calls
+//
+
+#include "../../../../Kernel/include/syscalls.h"
+
+.globl _start
+.extern SoMain
+_start:
+       push {r1,r2,r3}
+       bl SoMain
+       
+       mov r4, r0
+
+       pop {r0,r1,r2}
+       blx r4
+       
+       b _exit
+
+@ Stupid GCC
+.globl __ucmpdi2
+__ucmpdi2:
+       cmp r0, r2
+       movmi r0, #0
+       movmi pc, lr
+       movhi r0, #2
+       movhi pc, lr
+       cmp r1, r2
+       movmi r0, #0
+       movmi pc, lr
+       movhi r0, #2
+       movhi pc, lr
+       mov r0, #1
+       mov pc, lr
+
+@ DEST
+@ SRC
+@_memcpy:
+@      push rbp
+@      mov rbp, rsp
+@      
+@      ; RDI - First Param
+@      ; RSI - Second Param
+@      mov rcx, rdx    ; RDX - Third
+@      rep movsb
+@      
+@      pop rbp
+@      ret
+@
+.globl _errno
+_errno:        .long   0       @ Placed in .text, to allow use of relative addressing
+
+.macro syscall0 _name, _num    
+.globl \_name
+\_name:
+       svc #\_num
+       str r2, _errno
+       mov pc, lr
+.endm
+
+#define SYSCALL0(_name,_num)   syscall0 _name, _num
+#define SYSCALL1(_name,_num)   SYSCALL0(_name, _num)
+#define SYSCALL2(_name,_num)   SYSCALL0(_name, _num)
+#define SYSCALL3(_name,_num)   SYSCALL0(_name, _num)
+#define SYSCALL4(_name,_num)   SYSCALL0(_name, _num)
+// TODO: 5/6 need special handling, because the args are on the stack
+#define SYSCALL5(_name,_num)   SYSCALL0(_name, _num)
+#define SYSCALL6(_name,_num)   SYSCALL0(_name, _num)
+
+// Override the clone syscall
+#define _exit  _exit_raw
+#include "syscalls.s.h"
+#undef _exit
+
+.globl _exit
+_exit:
+       svc #0
+       b .
+