Changeset 7ca8b36b in mainline for arch/mips32/src/start.S

Timestamp:

2006-05-21T14:32:28Z (19 years ago)

Author:

Ondrej Palkovsky <ondrap@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

25bf215

Parents:

a33c990

Message:

Fixed mips bug fith TLS register not being properly saved on syscall context
switch.
Reverted SYS_IO, so that it could be used on machines without fb.

File:

• arch/mips32/src/start.S (modified) (4 diffs)

arch/mips32/src/start.S

@@ -223 +223 @@
         
         beqz $k0, syscall_shortcut
-        add $k0, 8            # Revert $k1 back to correct exc number
+        add $k0, 8            # Revert $k0 back to correct exc number
         
         REGISTERS_STORE_AND_EXC_RESET $sp
@@ -240 +240 @@
 #define SS_STATUS EOFFSET_STATUS
 #define SS_EPC    EOFFSET_EPC
+#define SS_K1     EOFFSET_K1
 syscall_shortcut:
         # We have a lot of space on the stack, with free use
@@ -245 +246 @@
         mfc0 $t0, $status
         sw $t1,SS_EPC($sp)  # Save EPC
+        sw $k1,SS_K1($sp)   # Save k1, which is not saved during context switch
         
         and $t2, $t0, REG_SAVE_MASK # Save only KSU,EXL,ERL,IE
@@ -271 +273 @@
         # restore epc+4
         lw $t0,SS_EPC($sp)
+        lw $k1,SS_K1($sp)
         addi $t0, $t0, 4
         mtc0 $t0, $epc