MIPS startup code:

- Removed tabs.
- Removed nonsense code involving $s7.
+ Call finalization procedure in the end, fixes webtbs/tw9089.
+ added non-executable stack marker.

git-svn-id: trunk@23842 -

rtl/linux/mips/prt0.as

@@ -12,7 +12,7 @@
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */
         .set noat
-
+        .set noreorder
         .section ".text"
 
         .align 4
@@ -20,11 +20,9 @@
         .ent    _dynamic_start
         .type   _dynamic_start,@function
 _dynamic_start:
-        /* TODO: check whether this code is correct */
         lui     $a2,%hi(__dl_fini)
-        sw      $v0,%lo(__dl_fini)($a2)
         b _start
-	nop
+        sw      $v0,%lo(__dl_fini)($a2)
 
         .end    _dynamic_start
         .size   _dynamic_start, .-_dynamic_start
@@ -46,7 +44,7 @@ _dynamic_start:
 
                ...
       (4*argc)(%sp)    NULL
- 		(4*(argc+1))(%sp)	envp[0]
+   4*(argc+1))(%sp)    envp[0]
                ...
                        NULL
     ra ($31)    Return address set to zero.
@@ -63,12 +61,6 @@ _start:
 
         addiu   $sp,$sp,-32
 
-        lui     $s7,0x3d
-        addiu   $s7,$s7,2304
-        li      $at,-8
-        and     $s7,$s7,$at
-        addiu   $s7,$s7,-32
-
         /* store argc */
         lw      $a0,0($s8)
         lui     $a1,%hi(operatingsystem_parameter_argc)
@@ -99,11 +91,19 @@ _start:
         .ent    _haltproc
         .type   _haltproc,@function
 _haltproc:
-        /* TODO: need to check whether __dl_fini is non-zero and call the function pointer in case */
-
+        addiu   $sp,$sp,-24
+        sw      $a0,16($sp)              /* $a0 contains the exitcode */
+        lui     $at,%hi(__dl_fini)
+        lw      $t9,%lo(__dl_fini)($at)
+        beqz    $t9,.L1
+        nop
+        jalr    $t9
+.L1:
+        lw      $a0,16($sp)
         li      $v0,4001
         syscall
-        b       _haltproc
+        nop
+        b       .L1
         nop
 
         .end _haltproc
@@ -116,3 +116,4 @@ _haltproc:
         .comm operatingsystem_parameter_argc,4
         .comm operatingsystem_parameter_argv,4
 
+.section .note.GNU-stack,"",@progbits