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powerpc: ftrace_caller, _mcount is exported to modules so needs _GLOBAL_TOC()

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When testing the ftrace function tracer, I realised that ftrace_caller
and mcount are called from modules and they both call into C, therefore
they need the ABIv2 global entry point to establish r2.

Signed-off-by: Anton Blanchard <anton@samba.org>
This commit is contained in:
Anton Blanchard
2014-04-04 09:06:33 +11:00
parent 169c7cee31
commit 5e66684fe4
1 changed files with 2 additions and 5 deletions
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arch/powerpc/kernel/entry_64.S
+2 -5
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@@ -1175,7 +1175,7 @@ _GLOBAL(mcount)
_GLOBAL(_mcount)
blr
_GLOBAL(ftrace_caller)
_GLOBAL_TOC(ftrace_caller)
/* Taken from output of objdump from lib64/glibc */
mflr r3
ld r11, 0(r1)
@@ -1199,10 +1199,7 @@ _GLOBAL(ftrace_graph_stub)
_GLOBAL(ftrace_stub)
blr
#else
_GLOBAL(mcount)
blr
_GLOBAL(_mcount)
_GLOBAL_TOC(_mcount)
/* Taken from output of objdump from lib64/glibc */
mflr r3
ld r11, 0(r1)