diff options
| -rw-r--r-- | gdb/doc/ChangeLog | 5 | ||||
| -rw-r--r-- | gdb/doc/gdb.texinfo | 134 |
2 files changed, 121 insertions, 18 deletions
diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog index a759cad..71df0d0 100644 --- a/gdb/doc/ChangeLog +++ b/gdb/doc/ChangeLog @@ -1,5 +1,10 @@ 2002-09-19 Andrew Cagney <ac131313@redhat.com> + * gdb.texinfo (Packets): Revise `z' and `Z' packet documentation. + (Packets): Add cross reference from `b' packet to `z' packets. + +2002-09-19 Andrew Cagney <ac131313@redhat.com> + * gdb.texinfo (Maintenance Commands): Document ``maint internal-error'' and ``maint internal-warning''. diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index c42e0e6..39768cb 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -14563,8 +14563,10 @@ of view, nothing actually happened.} @cindex @code{B} packet Set (@var{mode} is @samp{S}) or clear (@var{mode} is @samp{C}) a -breakpoint at @var{addr}. @emph{This has been replaced by the @samp{Z} -and @samp{z} packets.} +breakpoint at @var{addr}. + +This packet has been replaced by the @samp{Z} and @samp{z} packets +(@pxref{insert breakpoint or watchpoint packet}). @item @code{c}@var{addr} --- continue @cindex @code{c} packet @@ -14936,32 +14938,128 @@ Reserved for future use. Reserved for future use. -@item @code{z}@var{t}@code{,}@var{addr}@code{,}@var{length} --- remove break or watchpoint @strong{(draft)} +@item @code{z}@var{type}@code{,}@var{addr}@code{,}@var{length} --- remove breakpoint or watchpoint @strong{(draft)} +@itemx @code{Z}@var{type}@code{,}@var{addr}@code{,}@var{length} --- insert breakpoint or watchpoint @strong{(draft)} +@anchor{insert breakpoint or watchpoint packet} @cindex @code{z} packet +@cindex @code{Z} packets -@xref{insert breakpoint or watchpoint packet}. +Insert (@code{Z}) or remove (@code{z}) a @var{type} breakpoint or +watchpoint starting at address @var{address} and covering the next +@var{length} bytes. -@item @code{Z}@var{t}@code{,}@var{addr}@code{,}@var{length} --- insert break or watchpoint @strong{(draft)} -@anchor{insert breakpoint or watchpoint packet} -@cindex @code{Z} packet +Each breakpoint and watchpoint packet @var{type} is documented +separately. + +@emph{Implementation notes: A remote target shall return @samp{} for an +unrecognized breakpoint or watchpoint packet @var{type}. A remote +target shall support either both or neither of a given +@code{Z}@var{type}@dots{} and @code{z}@var{type}@dots{} packet pair. To +avoid potential problems with duplicate packets, the operations should +be implemented in an idempotent way.} + +@item @code{z}@code{0}@code{,}@var{addr}@code{,}@var{length} --- remove memory breakpoint @strong{(draft)} +@item @code{Z}@code{0}@code{,}@var{addr}@code{,}@var{length} --- insert memory breakpoint @strong{(draft)} +@cindex @code{z0} packet +@cindex @code{Z0} packet + +Insert (@code{Z0}) or remove (@code{z0}) a memory breakpoint at address +@code{addr} of size @code{length}. + +A memory breakpoint is implemented by replacing the instruction at +@var{addr} with a software breakpoint or trap instruction. The +@code{length} is used by targets that indicates the size of the +breakpoint (in bytes) that should be inserted (e.g., the @sc{arm} and +@sc{mips} can insert either a 2 or 4 byte breakpoint). -@var{t} is type: @samp{0} - software breakpoint, @samp{1} - hardware -breakpoint, @samp{2} --- write watchpoint, @samp{3} - read watchpoint, -@samp{4} - access watchpoint; @var{addr} is address; @var{length} is in -bytes. For a software breakpoint, @var{length} specifies the size of -the instruction to be patched. For hardware breakpoints and watchpoints -@var{length} specifies the memory region to be monitored. To avoid -potential problems with duplicate packets, the operations should be -implemented in an idempotent way. +@emph{Implementation note: It is possible for a target to copy or move +code that contains memory breakpoints (e.g., when implementing +overlays). The behavior of this packet, in the presence of such a +target, is not defined.} Reply: @table @samp +@item OK +success +@item +not supported @item E@var{NN} for an error +@end table + +@item @code{z}@code{1}@code{,}@var{addr}@code{,}@var{length} --- remove hardware breakpoint @strong{(draft)} +@item @code{Z}@code{1}@code{,}@var{addr}@code{,}@var{length} --- insert hardware breakpoint @strong{(draft)} +@cindex @code{z1} packet +@cindex @code{Z1} packet + +Insert (@code{Z1}) or remove (@code{z1}) a hardware breakpoint at +address @code{addr} of size @code{length}. + +A hardware breakpoint is implemented using a mechanism that is not +dependant on being able to modify the target's memory. + +@emph{Implementation note: A hardware breakpoint is not affected by code +movement.} + +Reply: +@table @samp @item OK -for success -@item @samp{} -If not supported. +success +@item +not supported +@item E@var{NN} +for an error +@end table + +@item @code{z}@code{2}@code{,}@var{addr}@code{,}@var{length} --- remove write watchpoint @strong{(draft)} +@item @code{Z}@code{2}@code{,}@var{addr}@code{,}@var{length} --- insert write watchpoint @strong{(draft)} +@cindex @code{z2} packet +@cindex @code{Z2} packet + +Insert (@code{Z2}) or remove (@code{z2}) a write watchpoint. + +Reply: +@table @samp +@item OK +success +@item +not supported +@item E@var{NN} +for an error +@end table + +@item @code{z}@code{3}@code{,}@var{addr}@code{,}@var{length} --- remove read watchpoint @strong{(draft)} +@item @code{Z}@code{3}@code{,}@var{addr}@code{,}@var{length} --- insert read watchpoint @strong{(draft)} +@cindex @code{z3} packet +@cindex @code{Z3} packet + +Insert (@code{Z3}) or remove (@code{z3}) a write watchpoint. + +Reply: +@table @samp +@item OK +success +@item +not supported +@item E@var{NN} +for an error +@end table + +@item @code{z}@code{4}@code{,}@var{addr}@code{,}@var{length} --- remove read watchpoint @strong{(draft)} +@item @code{Z}@code{4}@code{,}@var{addr}@code{,}@var{length} --- insert read watchpoint @strong{(draft)} +@cindex @code{z4} packet +@cindex @code{Z4} packet + +Insert (@code{Z4}) or remove (@code{z4}) an access watchpoint. + +Reply: +@table @samp +@item OK +success +@item +not supported +@item E@var{NN} +for an error @end table @end table |