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| author |   Tony Lu <zlu@ezchip.com> | 2015-03-27 14:46:38 -0400 |
|---|---|---|
| committer |   Chris Metcalf <cmetcalf@ezchip.com> | 2015-04-17 14:01:38 -0400 |
| commit | 437d3e124d25daaa671bfecfd4015ecd2503a955 (patch) | |
| tree | ddc6e9491b9a14a09c6476d0543e9f4896dfd77d /arch/tile/kernel/mcount_64.S | |
| parent | tile: map data region shadow of kernel as R/W (diff) | |
| download | linux-dev-437d3e124d25daaa671bfecfd4015ecd2503a955.tar.xz linux-dev-437d3e124d25daaa671bfecfd4015ecd2503a955.zip | |
tile: ftrace: fix function_graph tracer issues
- Add support for ARCH_SUPPORTS_FTRACE_OPS
- Replace the instruction in ftrace_call with the bundle {move r10, lr;
jal ftrace_stub}, so that the lr contains the right value after returning
from ftrace_stub. An alternative fix might be to leave the instruction
in ftrace_call alone when it is being updated with ftrace_stub.
Signed-off-by: Tony Lu <zlu@ezchip.com>
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/tile/kernel/mcount_64.S | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/tile/kernel/mcount_64.S b/arch/tile/kernel/mcount_64.S index 3c2b8d5e1d1a..6c6702451962 100644 --- a/arch/tile/kernel/mcount_64.S +++ b/arch/tile/kernel/mcount_64.S @@ -81,7 +81,12 @@ STD_ENTRY(ftrace_caller) /* arg1: self return address */ /* arg2: parent's return address */ - { move r0, lr; move r1, r10 } + /* arg3: ftrace_ops */ + /* arg4: regs (but make it NULL) */ + { move r0, lr; moveli r2, hw2_last(function_trace_op) } + { move r1, r10; shl16insli r2, r2, hw1(function_trace_op) } + { movei r3, 0; shl16insli r2, r2, hw0(function_trace_op) } + ld r2,r2 .global ftrace_call ftrace_call: |