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| author | Nicolas Pitre <nico@fluxnic.net> | 2009-12-03 17:27:13 -0500 |
|---|---|---|
| committer | David Brownell <dbrownell@users.sourceforge.net> | 2009-12-03 18:42:01 -0800 |
| commit | ed59dfc80aa6fc48a0894c8e46cee675f38ac949 (patch) | |
| tree | 2f0e0d1f3efb989f5b43f794536cce04bbd3e622 /doc/openocd.texi | |
| parent | f62c035c5277871193fa9904f430cf57221c0b89 (diff) | |
| download | openocd+libswd-ed59dfc80aa6fc48a0894c8e46cee675f38ac949.tar.gz openocd+libswd-ed59dfc80aa6fc48a0894c8e46cee675f38ac949.tar.bz2 openocd+libswd-ed59dfc80aa6fc48a0894c8e46cee675f38ac949.tar.xz openocd+libswd-ed59dfc80aa6fc48a0894c8e46cee675f38ac949.zip | |
basic ARM semihosting support
Semihosting enables code running on an ARM target to use the
I/O facilities on the host computer. The target application must
be linked against a library that forwards operation requests by
using the SVC instruction that is trapped at the Supervisor Call
vector by the debugger. The "hosted" library version provided
with CodeSourcery's Sourcery G++ Lite for ARM EABI is one example.
This is currently available for ARM9 processors, but any ARM
variant should be able to support this with little additional work.
Tested using binaries compiled with Sourcery G++ Lite 2009q1-161
and ARM RVCT 3.0.
[dbrownell@users.sourceforge.net: doc tweaks, NEWS]
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Diffstat (limited to 'doc/openocd.texi')
| -rw-r--r-- | doc/openocd.texi | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/doc/openocd.texi b/doc/openocd.texi index 7e232117..4d13f073 100644 --- a/doc/openocd.texi +++ b/doc/openocd.texi @@ -5674,6 +5674,17 @@ cables (FT2232), but might be unsafe if used with targets running at very low speeds, like the 32kHz startup clock of an AT91RM9200. @end deffn +@deffn Command {arm7_9 semihosting} [@option{enable}|@option{disable}] +Display status of semihosting, after optionally changing that status. + +Semihosting allows for code executing on an ARM target to use the +I/O facilities on the host computer i.e. the system where OpenOCD +is running. The target application must be linked against a library +implementing the ARM semihosting convention that forwards operation +requests by using a special SVC instruction that is trapped at the +Supervisor Call vector by OpenOCD. +@end deffn + @subsection ARM720T specific commands @cindex ARM720T |