5d360a75f8
This implements just the basic function tracer (_mcount) backend for s390. The dynamic variant will come later. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
56 lines
844 B
ArmAsm
56 lines
844 B
ArmAsm
/*
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* Copyright IBM Corp. 2008
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*
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* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
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*
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*/
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#ifndef CONFIG_64BIT
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.globl _mcount
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_mcount:
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stm %r0,%r5,8(%r15)
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st %r14,56(%r15)
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lr %r1,%r15
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ahi %r15,-96
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l %r3,100(%r15)
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la %r2,0(%r14)
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st %r1,0(%r15)
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la %r3,0(%r3)
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bras %r14,0f
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.long ftrace_trace_function
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0: l %r14,0(%r14)
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l %r14,0(%r14)
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basr %r14,%r14
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ahi %r15,96
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lm %r0,%r5,8(%r15)
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l %r14,56(%r15)
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br %r14
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.globl ftrace_stub
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ftrace_stub:
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br %r14
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#else /* CONFIG_64BIT */
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.globl _mcount
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_mcount:
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stmg %r0,%r5,16(%r15)
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stg %r14,112(%r15)
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lgr %r1,%r15
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aghi %r15,-160
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stg %r1,0(%r15)
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lgr %r2,%r14
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lg %r3,168(%r15)
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larl %r14,ftrace_trace_function
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lg %r14,0(%r14)
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basr %r14,%r14
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aghi %r15,160
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lmg %r0,%r5,16(%r15)
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lg %r14,112(%r15)
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br %r14
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.globl ftrace_stub
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ftrace_stub:
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br %r14
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#endif /* CONFIG_64BIT */
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