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-rw-r--r--arch/parisc/kernel/entry.S64
1 files changed, 64 insertions, 0 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index 89c801c2b5d1..3e430590c1e1 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -2012,6 +2012,70 @@ ftrace_stub:
#endif
ENDPROC_CFI(mcount)
+#ifdef CONFIG_DYNAMIC_FTRACE
+
+#ifdef CONFIG_64BIT
+#define FTRACE_FRAME_SIZE (2*FRAME_SIZE)
+#else
+#define FTRACE_FRAME_SIZE FRAME_SIZE
+#endif
+ENTRY_CFI(ftrace_caller, caller,frame=FTRACE_FRAME_SIZE,CALLS,SAVE_RP,SAVE_SP)
+ftrace_caller:
+ .global ftrace_caller
+
+ STREG %r3, -FTRACE_FRAME_SIZE+1*REG_SZ(%sp)
+ ldo -FTRACE_FRAME_SIZE(%sp), %r3
+ STREG %rp, -RP_OFFSET(%r3)
+
+ /* Offset 0 is already allocated for %r1 */
+ STREG %r23, 2*REG_SZ(%r3)
+ STREG %r24, 3*REG_SZ(%r3)
+ STREG %r25, 4*REG_SZ(%r3)
+ STREG %r26, 5*REG_SZ(%r3)
+ STREG %r28, 6*REG_SZ(%r3)
+ STREG %r29, 7*REG_SZ(%r3)
+#ifdef CONFIG_64BIT
+ STREG %r19, 8*REG_SZ(%r3)
+ STREG %r20, 9*REG_SZ(%r3)
+ STREG %r21, 10*REG_SZ(%r3)
+ STREG %r22, 11*REG_SZ(%r3)
+ STREG %r27, 12*REG_SZ(%r3)
+ STREG %r31, 13*REG_SZ(%r3)
+ loadgp
+ ldo -16(%sp),%r29
+#endif
+ LDREG 0(%r3), %r25
+ copy %rp, %r26
+ ldo -8(%r25), %r25
+ b,l ftrace_function_trampoline, %rp
+ copy %r3, %r24
+
+ LDREG -RP_OFFSET(%r3), %rp
+ LDREG 2*REG_SZ(%r3), %r23
+ LDREG 3*REG_SZ(%r3), %r24
+ LDREG 4*REG_SZ(%r3), %r25
+ LDREG 5*REG_SZ(%r3), %r26
+ LDREG 6*REG_SZ(%r3), %r28
+ LDREG 7*REG_SZ(%r3), %r29
+#ifdef CONFIG_64BIT
+ LDREG 8*REG_SZ(%r3), %r19
+ LDREG 9*REG_SZ(%r3), %r20
+ LDREG 10*REG_SZ(%r3), %r21
+ LDREG 11*REG_SZ(%r3), %r22
+ LDREG 12*REG_SZ(%r3), %r27
+ LDREG 13*REG_SZ(%r3), %r31
+#endif
+ LDREG 1*REG_SZ(%r3), %r3
+
+ LDREGM -FTRACE_FRAME_SIZE(%sp), %r1
+ /* Adjust return point to jump back to beginning of traced function */
+ ldo -4(%r1), %r1
+ bv,n (%r1)
+
+ENDPROC_CFI(ftrace_caller)
+
+#endif
+
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.align 8
ENTRY_CFI(return_to_handler, caller,frame=FRAME_SIZE)