[MIPS] Untrusted versions of setjmp and longjmp.

pnacl/support/setjmp_mips32.S

Index: pnacl/support/setjmp_mips32.S
diff --git a/pnacl/support/setjmp_mips32.S b/pnacl/support/setjmp_mips32.S
new file mode 100644
index 0000000000000000000000000000000000000000..3a906f47343a3fb4b115aefc7d818c9c30a1ceca
--- /dev/null
+++ b/pnacl/support/setjmp_mips32.S
@@ -0,0 +1,175 @@
+/*
+ * Copyright (c) 2012 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "nacl_mips_defs.h"
+
+  .text
+  .p2align 4
+  .align NACL_BLOCK_SHIFT
+  .globl setjmp
+  .ent setjmp
+  .frame  $sp, 0, $31
+  .set noreorder
+
+/* int setjmp(jmp_buf env) */
+setjmp:
+
+  /* The code here is grouped by instruction bundle. */
+
+  /* NACL_CALLEE_SAVE_LIST BEGIN */
+  and  $a0, $a0, STORE_MASK
+  sw   $s0, 0($a0)
+  and  $a0, $a0, STORE_MASK
+  sw   $s1, 4($a0)
+
+  and  $a0, $a0, STORE_MASK
+  sw   $s2, 8($a0)
+  and  $a0, $a0, STORE_MASK
+  sw   $s3, 12($a0)
+
+  and  $a0, $a0, STORE_MASK
+  sw   $s4, 16($a0)
+  and  $a0, $a0, STORE_MASK
+  sw   $s5, 20($a0)
+
+  and  $a0, $a0, STORE_MASK
+  sw   $s6, 24($a0)
+  and  $a0, $a0, STORE_MASK
+  sw   $s7, 28($a0)
+
+  and  $a0, $a0, STORE_MASK
+  sw   $sp, 32($a0)
+  and  $a0, $a0, STORE_MASK
+  sw   $fp, 36($a0)
+
+  and  $a0, $a0, STORE_MASK
+  sw   $ra, 40($a0)
+  and  $a0, $a0, STORE_MASK
+  swc1 $f20, 44($a0)
+
+  and  $a0,  $a0, STORE_MASK
+  swc1 $f21, 48($a0)
+  and  $a0,  $a0, STORE_MASK
+  swc1 $f22, 52($a0)
+
+  and  $a0,  $a0, STORE_MASK
+  swc1 $f23, 56($a0)
+  and  $a0,  $a0, STORE_MASK
+  swc1 $f24, 60($a0)
+
+  and  $a0,  $a0, STORE_MASK
+  swc1 $f25, 64($a0)
+  and  $a0,  $a0, STORE_MASK
+  swc1 $f26, 68($a0)
+
+  and  $a0,  $a0, STORE_MASK
+  swc1 $f27, 72($a0)
+  and  $a0,  $a0, STORE_MASK
+  swc1 $f28, 76($a0)
+
+  and  $a0,  $a0, STORE_MASK
+  swc1 $f29, 80($a0)
+  and  $a0,  $a0, STORE_MASK
+  swc1 $f30, 84($a0)
+
+  and  $a0,  $a0, STORE_MASK
+  swc1 $f31, 88($a0)
+  /* NACL_CALLEE_SAVE_LIST END */
+  move $v0, $zero
+  nop
+
+  and  $ra, $ra, JUMP_MASK
+  j    $ra
+  nop
+  nop
+
+  .end setjmp
+
+  .text
+  .p2align 4
+  .align NACL_BLOCK_SHIFT
+  .globl longjmp
+  .ent longjmp
+  .set noreorder
+
+/* void longjmp(jmp_buf env, int val) */
+longjmp:
+
+  /* NACL_CALLEE_LOAD_LIST BEGIN */
+  and  $a0, $a0, STORE_MASK
+  lw   $s0, 0($a0)
+  and  $a0, $a0, STORE_MASK
+  lw   $s1, 4($a0)
+
+  and  $a0, $a0, STORE_MASK
+  lw   $s2, 8($a0)
+  and  $a0, $a0, STORE_MASK
+  lw   $s3, 12($a0)
+
+  and  $a0, $a0, STORE_MASK
+  lw   $s4, 16($a0)
+  and  $a0, $a0, STORE_MASK
+  lw   $s5, 20($a0)
+
+  and  $a0, $a0, STORE_MASK
+  lw   $s6, 24($a0)
+  and  $a0, $a0, STORE_MASK
+  lw   $s7, 28($a0)
+
+  and  $a0, $a0, STORE_MASK
+  lw   $sp, 32($a0)
+  and  $sp, $sp, STORE_MASK
+  nop
+
+  and  $a0, $a0, STORE_MASK
+  lw   $fp, 36($a0)
+  and  $a0, $a0, STORE_MASK
+  lw   $ra, 40($a0)
+
+  and  $a0,  $a0, STORE_MASK
+  lwc1 $f20, 44($a0)
+  and  $a0,  $a0, STORE_MASK
+  lwc1 $f21, 48($a0)
+
+  and  $a0,  $a0, STORE_MASK
+  lwc1 $f22, 52($a0)
+  and  $a0,  $a0, STORE_MASK
+  lwc1 $f23, 56($a0)
+
+  and  $a0,  $a0, STORE_MASK
+  lwc1 $f24, 60($a0)
+  and  $a0,  $a0, STORE_MASK
+  lwc1 $f25, 64($a0)
+
+  and  $a0,  $a0, STORE_MASK
+  lwc1 $f26, 68($a0)
+  and  $a0,  $a0, STORE_MASK
+  lwc1 $f27, 72($a0)
+
+  and  $a0,  $a0, STORE_MASK
+  lwc1 $f28, 76($a0)
+  and  $a0,  $a0, STORE_MASK
+  lwc1 $f29, 80($a0)
+
+  and  $a0,  $a0, STORE_MASK
+  lwc1 $f30, 84($a0)
+  and  $a0,  $a0, STORE_MASK
+  lwc1 $f31, 88($a0)
+  /* NACL_CALLEE_LOAD_LIST END */
+
+  bne  $a1, $zero, 1f
+  nop
+  ori  $a1, $zero, 1
+1:
+  move $v0, $a1
+
+  and  $ra, $ra, JUMP_MASK
+  j    $ra
+  nop
+  nop
+
+  .end longjmp
+