AcoSail/kernel_optimize_test
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parisc: Use long jump to reach ftrace_return_to_handler()

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Depending on config options we will need to use a long jump to reach
ftrace_return_to_handler().  Additionally only compile the
parisc_return_to_handler code when CONFIG_FUNCTION_GRAPH_TRACER is set.

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2016-05-23 23:23:26 +02:00
parent 90afe0a98e
commit 5fece5ad24
1 changed files with 10 additions and 1 deletions
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11
arch/parisc/kernel/entry.S
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@ -2019,6 +2019,7 @@ ftrace_stub:
.procend
ENDPROC(mcount)
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.align 8
.globl return_to_handler
.type return_to_handler, @function
@ -2040,11 +2041,17 @@ parisc_return_to_handler:
#endif
/* call ftrace_return_to_handler(0) */
.import ftrace_return_to_handler,code
load32 ftrace_return_to_handler,%ret0
load32 .Lftrace_ret,%r2
#ifdef CONFIG_64BIT
ldo -16(%sp),%ret1 /* Reference param save area */
bve (%ret0)
#else
bv %r0(%ret0)
#endif
BL ftrace_return_to_handler,%r2
ldi 0,%r26
.Lftrace_ret:
copy %ret0,%rp
/* restore original return values */
@ -2062,6 +2069,8 @@ parisc_return_to_handler:
.procend
ENDPROC(return_to_handler)
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
#endif /* CONFIG_FUNCTION_TRACER */
#ifdef CONFIG_IRQSTACKS