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Diffstat (limited to 'gdb/doc/gdb.texinfo')
| -rw-r--r-- | gdb/doc/gdb.texinfo | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index 0e1d553..b48dc70 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -31815,6 +31815,21 @@ each register and their position within the @samp{g} packet are determined by the @value{GDBN} internal gdbarch functions @code{DEPRECATED_REGISTER_RAW_SIZE} and @code{gdbarch_register_name}. The specification of several standard @samp{g} packets is specified below. + +When reading registers from a trace frame (@pxref{Analyze Collected +Data,,Using the Collected Data}), the stub may also return a string of +literal @samp{x}'s in place of the register data digits, to indicate +that the corresponding register has not been collected, thus its value +is unavailable. For example, for an architecture with 4 registers of +4 bytes each, the following reply indicates to @value{GDBN} that +registers 0 and 2 have not been collected, while registers 1 and 3 +have been collected, and both have zero value: + +@smallexample +-> @code{g} +<- @code{xxxxxxxx00000000xxxxxxxx00000000} +@end smallexample + @item E @var{NN} for an error. @end table |