First cut at MIPS port.

* jmp.S (jmp_save, jmp_restore): Implement for 32 bit MIPS.

* unwind.h (struct jmp): 32 bit MIPS definition added.

2 files changed, 51 insertions, 0 deletions

diff --git a/jmp.S b/jmp.S
index 994b09bd..80841e63 100644
--- a/jmp.S
+++ b/jmp.S
@@ -329,6 +329,40 @@ DEFUN(jmp_restore)
   mov w0, w1
   br x30
 
+#elif _MIPS_SZPTR == 32
+
+DEFUN(jmp_save)
+  sw $16, 0($4)
+  sw $17, 4($4)
+  sw $18, 8($4)
+  sw $19, 12($4)
+  sw $20, 16($4)
+  sw $21, 20($4)
+  sw $22, 24($4)
+  sw $23, 28($4)
+  sw $28, 32($4)
+  sw $29, 36($4)
+  sw $30, 40($4)
+  sw $ra, 44($4)
+  jr $ra
+  li $2, 0
+
+DEFUN(jmp_restore)
+  lw $16, 0($4)
+  lw $17, 4($4)
+  lw $18, 8($4)
+  lw $19, 12($4)
+  lw $20, 16($4)
+  lw $21, 20($4)
+  lw $22, 24($4)
+  lw $23, 28($4)
+  lw $28, 32($4)
+  lw $29, 36($4)
+  lw $ra, 44($4)
+  lw $30, 40($4)
+  jr $ra
+  move $2, $5
+
 #else
 #error port me!
 #endif
diff --git a/unwind.h b/unwind.h
index 2159a1a4..a9f8d60c 100644
--- a/unwind.h
+++ b/unwind.h
@@ -141,6 +141,23 @@ struct jmp {
    x19-x28, x29(fp), x30(lr), (x31)sp, d8-d15.  Other registers are not
    saved.  */
 
+#elif _MIPS_SZPTR == 32
+
+struct jmp {
+  unsigned long s0; /* $16 */
+  unsigned long s1; /* ... */
+  unsigned long s2;
+  unsigned long s3;
+  unsigned long s4;
+  unsigned long s5;
+  unsigned long s6; /* ... */
+  unsigned long s8; /* $23 */
+  unsigned long gp; /* $28 */
+  unsigned long sp; /* $29 */
+  unsigned long fp; /* $30 */
+  unsigned long ra; /* $31 */
+};
+
 #else
 #error port me!
 #endif