forked from Imagelibrary/rtems
43 lines
1.6 KiB
Plaintext
43 lines
1.6 KiB
Plaintext
Simple BSP for the SH simulator built into gdb.
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Simulator Invocation
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====================
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sh-rtems[elf|]-gdb <executable>
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(gdb) target sim
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(gdb) set archi [sh|sh2]
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(gdb) load <executable>
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(gdb) run
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Status
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======
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* The simulator invocation procedure outlined above produces error messages
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with gdb-5.0, nevertheless seems to work. With gdb versions > 5.0 these
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error messages are gone. I.e. if you plan to seriously work with the gdb
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simulator better use gdb versions > 5.0.
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* gdb's simulator is not able to correctly emulate memory areas esp. shadowing
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and non-consecutive memory. I.e. access to memory areas besides area 0 will
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(bogusly) generate SIGBUS exceptions. This includes access to area 5
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(On-chip peripherials) and prevents simulation of configuration and access
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to on-chip peripherials.
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* Due to limitations of the simulator you will only be able to run
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applications which do not try to access any SH control registers.
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Currently, this excludes all applications, which apply timers and serial
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devices, i.e. almost any real world application.
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* This BSP supports 3 different console devices (cf. configure --help):
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- trap34, an interface base on gdb's trap34 emulation. Known to work with
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gdb-5.0.
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- gdbsci1, a stripped down sci device driver adapted to apply gdb's sci1
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emulation. This is known to fail with gdb-5.0, because of a bug in gdb-5.0's
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sh-sim, a patch is submitted, but .. ~==
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- devnull, redirection of console io to /dev/null. Try to single step this,
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if you want to understand the details on how SH-RTEMS console redirection
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works.
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NOTE: the trap34 interface is incomplete and is temporarily disabled
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inside of configure.in.
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