[MIPS] Fix register handling in syscalls when debugging.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index 2258fc6..a42e0e8 100644 (file)
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -94,11 +94,13 @@ syscall_trace_entry:
        li      a1, 0
        jal     do_syscall_trace
 
+       move    t0, s0
+       RESTORE_STATIC
        lw      a0, PT_R4(sp)           # Restore argument registers
        lw      a1, PT_R5(sp)
        lw      a2, PT_R6(sp)
        lw      a3, PT_R7(sp)
-       jalr    s0
+       jalr    t0
 
        li      t0, -EMAXERRNO - 1      # error?
        sltu    t0, t0, v0

diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S
index cb28de6..47bfbd4 100644 (file)
--- a/arch/mips/kernel/scall64-64.S
+++ b/arch/mips/kernel/scall64-64.S
@@ -93,13 +93,15 @@ syscall_trace_entry:
        li      a1, 0
        jal     do_syscall_trace
 
+       move    t0, s0
+       RESTORE_STATIC
        ld      a0, PT_R4(sp)           # Restore argument registers
        ld      a1, PT_R5(sp)
        ld      a2, PT_R6(sp)
        ld      a3, PT_R7(sp)
        ld      a4, PT_R8(sp)
        ld      a5, PT_R9(sp)
-       jalr    s0
+       jalr    t0
 
        li      t0, -EMAXERRNO - 1      # error?
        sltu    t0, t0, v0

diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 7e66eb8..b465ced 100644 (file)
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -90,13 +90,15 @@ n32_syscall_trace_entry:
        li      a1, 0
        jal     do_syscall_trace
 
+       move    t0, s0
+       RESTORE_STATIC
        ld      a0, PT_R4(sp)           # Restore argument registers
        ld      a1, PT_R5(sp)
        ld      a2, PT_R6(sp)
        ld      a3, PT_R7(sp)
        ld      a4, PT_R8(sp)
        ld      a5, PT_R9(sp)
-       jalr    s0
+       jalr    t0
 
        li      t0, -EMAXERRNO - 1      # error?
        sltu    t0, t0, v0

diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 5a16401..3d338ca 100644 (file)
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -124,6 +124,8 @@ trace_a_syscall:
        li      a1, 0
        jal     do_syscall_trace
 
+       move    t0, s0
+       RESTORE_STATIC
        ld      a0, PT_R4(sp)           # Restore argument registers
        ld      a1, PT_R5(sp)
        ld      a2, PT_R6(sp)
@@ -132,7 +134,7 @@ trace_a_syscall:
        ld      a5, PT_R9(sp)
        ld      a6, PT_R10(sp)
        ld      a7, PT_R11(sp)          # For indirect syscalls
-       jalr    s0
+       jalr    t0
 
        li      t0, -EMAXERRNO - 1      # error?
        sltu    t0, t0, v0