1. 15 5月, 2013 1 次提交
    • H
      s390/ftrace: fix mcount adjustment · aca91209
      Heiko Carstens 提交于
      Tony Jones reported that the ftrace self tests on s390 do not work:
      
      <6>Testing dynamic ftrace ops #1: (0 0 0 0 0) FAILED!
      <6>Testing tracer irqsoff:
      <3>failed to start irqsoff tracer
      <4>.. no entries found ..FAILED!
      <6>Testing tracer wakeup:
      <3>failed to start wakeup tracer
      <4>.. no entries found ..FAILED!
      <6>Testing tracer function_graph:
      <4>Failed to init function_graph tracer, init returned -19
      <4>FAILED!
      
      This happens because we forgot to adjust the instruction pointer that gets
      passed to the ftrace trace function by MCOUNT_INSN_SIZE.
      
      In addition change MCOUNT_INSN_SIZE to the correct value on 31 bit.
      It only worked so far because the to be patched instruction was identical.
      Reported-by: NTony Jones <tonyj@suse.com>
      Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
      Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      aca91209
  2. 05 1月, 2011 1 次提交
  3. 27 2月, 2010 1 次提交
  4. 17 2月, 2010 1 次提交
  5. 14 10月, 2009 1 次提交
    • F
      tracing: Move syscalls metadata handling from arch to core · c44fc770
      Frederic Weisbecker 提交于
      Most of the syscalls metadata processing is done from arch.
      But these operations are mostly generic accross archs. Especially now
      that we have a common variable name that expresses the number of
      syscalls supported by an arch: NR_syscalls, the only remaining bits
      that need to reside in arch is the syscall nr to addr translation.
      
      v2: Compare syscalls symbols only after the "sys" prefix so that we
          avoid spurious mismatches with archs that have syscalls wrappers,
          in which case syscalls symbols have "SyS" prefixed aliases.
          (Reported by: Heiko Carstens)
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Acked-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      Cc: Jason Baron <jbaron@redhat.com>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      c44fc770
  6. 06 10月, 2009 1 次提交
  7. 27 8月, 2009 1 次提交
    • H
      tracing: Add syscall tracepoints - s390 arch update · 7515bf59
      Hendrik Brueckner 提交于
      This patch includes s390 arch updates to synchronize with latest
      core changes in the syscalls tracing area.
      
      - tracing: Map syscall name to number (syscall_name_to_nr())
      - tracing: Call arch_init_ftrace_syscalls at boot
      - tracing: add support tracepoint ids (set_syscall_{enter,exit}_id())
      Signed-off-by: NHendrik Brueckner <brueckner@linux.vnet.ibm.com>
      Cc: Jason Baron <jbaron@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: Jiaying Zhang <jiayingz@google.com>
      Cc: Martin Bligh <mbligh@google.com>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      LKML-Reference: <20090825123111.GD4639@cetus.boeblingen.de.ibm.com>
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      7515bf59
  8. 19 6月, 2009 1 次提交
    • S
      function-graph: add stack frame test · 71e308a2
      Steven Rostedt 提交于
      In case gcc does something funny with the stack frames, or the return
      from function code, we would like to detect that.
      
      An arch may implement passing of a variable that is unique to the
      function and can be saved on entering a function and can be tested
      when exiting the function. Usually the frame pointer can be used for
      this purpose.
      
      This patch also implements this for x86. Where it passes in the stack
      frame of the parent function, and will test that frame on exit.
      
      There was a case in x86_32 with optimize for size (-Os) where, for a
      few functions, gcc would align the stack frame and place a copy of the
      return address into it. The function graph tracer modified the copy and
      not the actual return address. On return from the funtion, it did not go
      to the tracer hook, but returned to the parent. This broke the function
      graph tracer, because the return of the parent (where gcc did not do
      this funky manipulation) returned to the location that the child function
      was suppose to. This caused strange kernel crashes.
      
      This test detected the problem and pointed out where the issue was.
      
      This modifies the parameters of one of the functions that the arch
      specific code calls, so it includes changes to arch code to accommodate
      the new prototype.
      
      Note, I notice that the parsic arch implements its own push_return_trace.
      This is now a generic function and the ftrace_push_return_trace should be
      used instead. This patch does not touch that code.
      
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Helge Deller <deller@gmx.de>
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      71e308a2
  9. 12 6月, 2009 3 次提交