* Singled out the off_t calls, because on *BSD they will often be OS/Arch specific.

rtl/netbsd/sysofft.inc

@@ -0,0 +1,100 @@
+
+
+function Fplseek(fd : cint; offset : off_t; whence : cint): off_t; assembler; [public, alias : 'FPC_SYSC_LSEEK'];
+
+asm
+  stwu    r1,-16(r1)
+  mflr    r0
+  stw     r0,20(r1) 
+  mr      r11,r5   
+  mr      r12,r4   
+  mr      r5,r3
+  mr      r9,r6 
+  li      r3,0  
+  mr      r7,r11    
+  mr      r8,r12
+  li      r6,0    
+  li      r4,199  
+  crclr   4*cr1+eq
+  li      r0,198
+  sc
+  bso     cerrorlseek
+  lwz     r0,20(r1)
+  mtlr    r0
+  addi    r1,r1,16
+  blr
+cerrorlseek:
+  lis   r4,Errno@ha
+  stw   r3,Errno@l(r4)
+  li    r3,-1
+  li    r4,-1
+  lwz     r0,20(r1)
+  mtlr    r0
+  addi    r1,r1,16
+end;   
+
+function Fpftruncate(fd : cint; flength : off_t): cint; assembler; [public, alias : 'FPC_SYSC_FTRUNCATE'];
+
+asm
+stwu    r1,-16(r1)
+mflr    r0
+stw     r0,20(r1)
+mr      r7,r5
+mr      r8,r6
+mr      r5,r3 
+li      r3,0  
+li      r4,201
+li      r6,0  
+crclr   4*cr1+eq
+li      r0,198  
+sc
+bso     cerrortrunc
+mr      r4,r3 
+lwz     r0,20(r1)
+mtlr    r0
+addi    r1,r1,16
+blr
+cerrortrunc:
+  lis     r4,Errno@ha
+  stw     r3,Errno@l(r4)
+  li      r3,-1
+  lwz     r0,20(r1)
+  mtlr    r0
+  addi    r1,r1,16
+end;
+
+
+Function Fpmmap(adr,len,prot,flags,fdes,off:longint):longint;  assembler; [public, alias : 'FPC_SYSC_MMAP'];
+
+asm
+  stwu    r1,-16(r1)
+  mflr    r0
+  stw     r0,20(r1)
+  mr      r0,r5
+  mr      r8,r6
+  stw     r9,8(r1)
+  stw     r10,12(r1)
+  mr      r5,r3
+  mr      r6,r4
+  mr      r9,r7
+  li      r3,0 
+  mr      r7,r0
+  li      r4,197
+  li      r10,0 
+  crclr   4*cr1+eq
+  li      r0,198
+  sc
+  bso     cerrormmap
+  mr      r4,r3
+  lwz     r0,20(r1)
+  mtlr    r0
+  addi    r1,r1,16
+  blr
+cerrormmap:
+  lis     r4,Errno@ha
+  stw     r3,Errno@l(r4)
+  li      r3,-1
+  lwz     r0,20(r1)
+  mtlr    r0
+  addi    r1,r1,16
+end;