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'perf annotate' displays function call assembler instructions with a right arrow. Hitting enter on this line/instruction causes the browser to disassemble this target function and show it on the screen. On s390 this results in an error message 'The called function was not found.' The function call assembly line parsing does not handle the s390 bras and brasl instructions. Function call__parse expects the target as first operand: callq e9140 <__fxstat> S390 has a register number as first operand: brasl %r14,41d60 <abort> Therefore the target addresses on s390 are always zero which is an invalid address. Introduce a s390 specific call parsing function which skips the first operand on s390. Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Link: http://lkml.kernel.org/r/20180307134325.96106-1-tmricht@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.