each of which holds a particular kind of information. In some
cases, information in one section refers to information in one
or more of the others. These relationships are illustrated by
-the diagram and associated notes on the following pages.
+the diagrams and associated notes on the following pages.
-\textit{This diagram does not distinguish between the normal
-and split object section pairs (for example, \dotdebuginfo{}
-versus \dotdebuginfodwo). Similarly, it does not show the
-relationship between the main debugging sections of an executable
-or sharable file and a related \addtoindex{supplementary object file}.}
+\section{Normal DWARF Section Relationships}
+Figure \referfol{fig:debugsectionrelationships} illustrates
+the DWARF section relations without split DWARF object files
+involved. Similarly, it does not show the
+relationships between the main debugging sections of an executable
+or sharable file and a related \addtoindex{supplementary object file}.
+
+\section{Split DWARF Section Relationships}
+Figure \ref{fig:splitdwarfsectionrelationships} illustrates
+the DWARF section relationships for split DWARF object files.
+However, it does not show the
+relationships between the main debugging sections of an executable
+or sharable file and a related \addtoindex{supplementary object file}.
\begin{landscape}
\begin{figure}
\begin{tikzpicture}
[sect/.style={rectangle, rounded corners=10pt, draw, fill=blue!15,
inner sep=.2cm, minimum width=4.0cm},
- link/.style={rectangle, draw,
- inner sep=.2cm, minimum width=4.5cm}]
-
+ link/.style={rectangle, draw,
+ inner sep=.2cm, minimum width=4.5cm},
+ circ/.style={circle, draw, minimum size=0.5cm}]
+
% The first (leftmost) column, first sections, then links, from top to bottom
%
\node(zsectara) at ( 0, 15.0) [sect] {\dotdebugaranges};
\node(zsectinf) at ( 0, 7.5) [sect] {\begin{tabular}{c}
\dotdebuginfo
\end{tabular}};
+\node(zcircs) at (-1, 5 ) [circ] {(s)};
\node(zlinkb) at ( 0, 1.5) [link] {To compilation unit~~(b)};
\node(zsectpub) at ( 0, 0.0) [sect] {\begin{tabular}{c}
\dotdebugnames
\end{tabular}};
-
+
+\draw[thick,angle 90-] (zcircs) -- (zsectinf);
\draw[thick,-to reversed] (zlinka) -- (zsectara);
\draw[thick,angle 90-] (zsectinf) -- (zlinka);
\draw[thick,-angle 90] (zlinkb) -- (zsectinf);
\draw[thick,to reversed-] (zsectpub) -- (zlinkb);
-% The seond column, similarly
+% The second column, similarly
%
\node(zsectfra) at (5, 15.0) [sect] {\dotdebugframe};
\node(zlinkc) at (5, 13.5) [link] {To abbreviations~~(c)};
\DWMACROundefindirect \\
(p)
\end{tabular}};
-\node(zlinkz) at (15.6, 6.0) [link] {\begin{tabular}{c}
+\node(zlinkz) at (15.6, 6.4) [link] {\begin{tabular}{c}
\DWMACROtransparentinclude \\
(q)
\end{tabular}};
\node(zlinkx) at (15.6, 3.8) [link] {\DWFORMlinestrp~(r)};
\node(zsectlns) at (15.6, 2.0) [sect] {\dotdebuglinestr};
-
+\node(zcircsp) at (15.6, 0.5) [circ] {(s)'};
+
\draw[thick,to reversed-] (zsectmac.east) -- (zlinky);
\draw[thick,-angle 90] (zlinky) -- (zsectstr.east);
\draw[<->,thick] (zsectmac.east) -- (zlinkz);
\draw[thick,to reversed-] (zsectlin.east) -- (zlinkx);
-\draw[thick, -angle 90] (zlinkx) -- (zsectlns);
+\draw[thick,-angle 90] (zlinkx) -- (zsectlns);
+\draw[thick,-angle 90] (zcircsp) -- (zsectlns);
+
\end{tikzpicture}
\vspace{5mm}
\caption{Debug section relationships}
\clearpage
\begin{center}
- \textbf{Notes}
+ \textbf{Notes for Figure \ref{fig:debugsectionrelationships}}
\end{center}
-\begin{enumerate}[(a)]
-\item \dotdebugaranges{} to \dotdebuginfo \\
+\begin{description}
+\itembfnl{(a) \dotdebugaranges{} to \dotdebuginfo}
The \texttt{debug\_info\_offset} value in
the header is
the offset in the \dotdebuginfo{} section of the
unit entry).
%b
-\item \dotdebugnames{} to \dotdebuginfo \\
+\itembfnl{(b) \dotdebugnames{} to \dotdebuginfo}
The \texttt{debug\_info\_offset} value in the header is the offset in the
\dotdebuginfo{} section of the
corresponding compilation unit header (not
the compilation unit entry).
%c
-\item \dotdebuginfo{} to \dotdebugabbrev \\
+\itembfnl{(c) \dotdebuginfo{} to \dotdebugabbrev}
The \texttt{debug\_abbrev\_offset} value in the header is the offset in the
\dotdebugabbrev{}
section of the abbreviations for that compilation unit.
%d
-\item \dotdebuginfo{} to \dotdebugstr \\
+\itembfnl{(d) \dotdebuginfo{} to \dotdebugstr}
Attribute values of class string may have form
\DWFORMstrp, whose
value is the offset in the \dotdebugstr{}
section of the corresponding string.
%e
-\item \dotdebuginfo{} to \dotdebugstroffsets \\
+\itembfnl{(e) \dotdebuginfo{} to \dotdebugstroffsets}
The value of the \DWATstroffsetsbase{} attribute in a
\DWTAGcompileunit{}, \DWTAGtypeunit{} or \DWTAGpartialunit{}
DIE is the offset in the
string offsets table.
%f
-\item \dotdebuginfo{} to \dotdebuginfo \\
+\itembfnl{(f) \dotdebuginfo{} to \dotdebuginfo}
The operand of the \DWOPcallref{}
DWARF expression operator is the
offset of a debugging information entry in the
\DWFORMrefaddr.
%g
-\item \dotdebuginfo{} to \dotdebugmacro \\
+\itembfnl{(g) \dotdebuginfo{} to \dotdebugmacro}
An attribute value of class
\livelink{chap:classmacptr}{macptr} (specifically form
\DWFORMsecoffset) is an
of the beginning of the macro information for the referencing unit.
%h
-\item \dotdebuginfo{} to \dotdebugline \\
+\itembfnl{(h) \dotdebuginfo{} to \dotdebugline}
An attribute value of class
\livelink{chap:classlineptr}{lineptr} (specifically form
\DWFORMsecoffset)
%i
\needlines{5}
-\item \dotdebuginfo{} to \dotdebugranges \\
+\itembfnl{(i) \dotdebuginfo{} to \dotdebugranges}
An attribute value of class \livelink{chap:classrangelistptr}{rangelistptr}
(specifically form
\DWFORMsecoffset)
a range list.
%j
-\item \dotdebuginfo{} to \dotdebugloc \\
+\itembfnl{(j) \dotdebuginfo{} to \dotdebugloc}
An attribute value of class \livelink{chap:classloclistptr}{loclistptr}
(specifically form
\DWFORMsecoffset)
\addtoindex{location list}.
%k
-\item \dotdebuginfo{} to \dotdebugaddr \\
+\itembfnl{(k) \dotdebuginfo{} to \dotdebugaddr}
The value of the \DWATaddrbase{} attribute in the
\DWTAGcompileunit{} or \DWTAGpartialunit{} DIE is the
offset in the \dotdebugaddr{} section of the machine
indices relative to that offset.
%l
-\item \dotdebugstroffsets{} to \dotdebugstr \\
+\itembfnl{(l) \dotdebugstroffsets{} to \dotdebugstr}
Entries in the string offsets table
are offsets to the corresponding string text in the
\dotdebugstr{} section.
%m
-\item \dotdebugmacro{} to \dotdebugstroffsets \\
+\itembfnl{(m) \dotdebugmacro{} to \dotdebugstroffsets}
The second operand of a
\DWMACROdefineindirectx{} or \DWMACROundefindirectx{}
macro information entry is an index
\dotdebugstroffsets{} section.
%n
-\item \dotdebugmacro{} to \dotdebugline \\
+\itembfnl{(n) \dotdebugmacro{} to \dotdebugline}
The second operand of
\DWMACROstartfile{} refers to a file entry in the
\dotdebugline{} section relative to the start
of that section given in the macro information header.
%o
-\item \dotdebugloc{} to \dotdebugaddr \\
+\itembfnl{(o) \dotdebugloc{} to \dotdebugaddr}
\DWOPaddrx{} and \DWOPconstx{} operators that occur in the
\dotdebugloc{} section refer indirectly to the
\dotdebugaddr{} section by way of the
\DWATaddrbase{} attribute in the associated \dotdebuginfo{}
-section. F
+section.
%p
-\item \dotdebugmacro{} to \dotdebugstr \\
+\itembfnl{(p) \dotdebugmacro{} to \dotdebugstr}
The second operand of a
\DWMACROdefineindirect{} or \DWMACROundefindirect{} macro information
entry is an index into the string table in the
%q
\needlines{4}
-\item \dotdebugmacro{} to \dotdebugmacro \\
+\itembfnl{(q) \dotdebugmacro{} to \dotdebugmacro}
The operand of a
\DWMACROtransparentinclude{} macro information
entry is an offset into another part of the
%r
\needlines{4}
-\item \dotdebugline{} to \dotdebuglinestr \\
+\itembfnl{(r) \dotdebugline{} to \dotdebuglinestr}
The value of a \DWFORMlinestrp{} form refers to a
string section specific to the line number table.
This form can be used in a \dotdebugline{} section
-(as shown) or in a \dotdebuginfo{} section (not shown).
+(as well as in a \dotdebuginfo{} section).
+
+%s
+\itembfnl{(s) \dotdebuginfo{} to \dotdebuglinestr}
+The value of a \DWFORMlinestrp{} form refers to a
+string section specific to the line number table.
+This form can be used in a \dotdebuginfo{} section
+(as well as in a \dotdebugline{} section).\footnote{
+The circled (s) connects to the circled
+(s)' via hyperspace (a wormhole).}
+
+\end{description}
+
+
+
+\begin{landscape}
+\begin{figure}
+%\scriptsize
+\begin{tikzpicture}
+ [sect/.style={rectangle, rounded corners=10pt, draw, fill=blue!15,
+ inner sep=.2cm, minimum width=4.0cm},
+ link/.style={rectangle, draw,
+ inner sep=.2cm, minimum width=4.5cm}]
+
+\fill[yellow!50] (7.5,-1) -- (7.5,14.5) -- (19,14.5) -- (19,-1) -- cycle;
+
+\node(ysectabb) at ( 5, 13.5) [sect] {\dotdebugabbrev};
+\node(ysectadd) at ( 2, 12.0) [sect] {\dotdebugaddr};
+\node(ysectara) at ( 0, 10.5) [sect] {\dotdebugaranges};
+\node(ysectfra) at ( 0, 9.0) [sect] {\dotdebugframe};
+\node(ysectlin) at ( 0, 7.5) [sect] {\dotdebugline};
+\node(ysectlis) at ( 0, 6.0) [sect] {\dotdebuglinestr};
+\node(ysectnam) at ( 0, 4.5) [sect] {\dotdebugnames};
+\node(ysectran) at ( 0, 3.0) [sect] {\dotdebugranges};
+\node(ysectstr) at ( 2, 1.5) [sect] {\dotdebugstr};
+\node(ysectsto) at ( 5, 0.0) [sect] {\dotdebugstroffsets};
+
+\node(ysectinf) at ( 5, 7) [sect] {\begin{tabular}{c}
+ \dotdebuginfo \\
+ skeleton
+ \end{tabular}};
+
+\node(ysectinfdwo) at (10.5,7) [sect] {\begin{tabular}{c}
+ \dotdebuginfodwo \\
+ One CU, possibly \\
+ multiple COMDAT \\
+ type units
+ \end{tabular}};
+
+\node(ysectabbdwo) at (10.5, 13.5) [sect] {\dotdebugabbrevdwo};
+\node(ysectlindwo) at (16.0, 7.5) [sect] {\dotdebuglinedwo};
+\node(ysectlocdwo) at (16.0, 11.0) [sect] {\dotdebuglocdwo};
+\node(ysectmacdwo) at (16.0, 4.5) [sect] {\dotdebugmacrodwo};
+\node(ysectstrdwo) at (13.0, 2.0) [sect] {\dotdebugstrdwo};
+\node(ysectstodwo) at (10.5, 0.0) [sect] {\dotdebugstroffsetsdwo};
+
+\draw[thick,-angle 90] (ysectinf) -- (ysectabb) node[midway, right] {(c)};
+\draw[thick,-angle 90] (ysectinf) -- (ysectadd) node[midway, right] {(k)};
+\draw[thick,-angle 90] (ysectara.east) -- (ysectinf) node[midway, left] {(a)};
+\draw[thick,-angle 90] (ysectinf) -- (ysectlin) node[midway, above] {(h)};
+\draw[thick,-angle 90] (ysectlin) -- (ysectlis) node[midway, right] {(l)};
+\draw[thick,-angle 90] (ysectnam.east) -- (ysectinf) node[midway, left] {(b)};
+\draw[thick,-angle 90] (ysectinf) -- (ysectran.east) node[left, near end] {(i)};
+\draw[thick,-angle 90] (ysectinf) -- (ysectstr) node[midway, right] {(d)};
+\draw[thick,-angle 90] (ysectinf) -- (ysectsto) node[midway, right] {(e)};
+\draw[thick,-angle 90] (ysectsto) -- (ysectstr) node[midway, right] {(l)};
+
+\draw[dashed, thick,-angle 90] (ysectinf) .. controls (7.5, 12) ..(ysectinfdwo)
+ node[midway, above] {(did)};
+
+\draw[thick,-angle 90] (ysectinfdwo) -- (ysectabbdwo) node[midway, right] {(co)};
+\draw[thick,-angle 90] (ysectinfdwo) -- (ysectlindwo) node[midway, above] {(ho)};
+\draw[thick,-angle 90] (ysectinfdwo) -- (ysectlocdwo.west) node[midway, below] {(jo)};
+\draw[thick,-angle 90] (ysectinfdwo) -- (ysectmacdwo.west) node[near end, above] {(go)};
+\draw[thick,-angle 90] (ysectinfdwo) -- (ysectstrdwo) node[midway, right] {(do)};
+\draw[thick,-angle 90] (ysectinfdwo) -- (ysectstodwo) node[midway, left] {(eo)};
+
+\draw[thick,-angle 90] (ysectstodwo) -- (ysectstrdwo) node[near end, below] {(lo)};
+\draw[thick,-angle 90] (ysectmacdwo) -- (ysectstrdwo) node[midway, left] {(po)};
+\draw[thick,-angle 90] (ysectmacdwo) .. controls (16.5, 1) .. (ysectstodwo.east)
+ node[near start, left] {(mo)};
+\draw[thick,-angle 90] (ysectlindwo.east) .. controls (19,4) and (18, 0) .. (ysectstodwo.east)
+ node[very near start, left] {(lmo)};
+
+\draw (0, 14) node {\begin{tabular}{l} Skeleton DWARF \\ in executable \end{tabular}};
+\draw (17, 14) node {\begin{tabular}{r} Split DWARF \\ in separate object \end{tabular}};
+\end{tikzpicture}
+\vspace{3mm}
+\caption{Split DWARF section relationships}
+\label{fig:splitdwarfsectionrelationships}
+\end{figure}
+\end{landscape}
+
+\clearpage
+\begin{center}
+ \textbf{Notes for Figure \ref{fig:splitdwarfsectionrelationships}}
+\end{center}
+\begin{description}
+\itembfnl{(a) \dotdebugaranges{} to \dotdebuginfo}
+The \texttt{debug\_info\_offset} field in the header is the
+offset in the \dotdebuginfo{} section of the corresponding
+compilation unit header of the skeleton \dotdebuginfo{} section
+(not the compilation unit entry). The \DWATdwoid{} and
+\DWATdwoname{} attributes in the \dotdebuginfo{} skeleton
+connect the ranges to the full compilation unit in \dotdebuginfodwo.
+
+\itembfnl{(b) \dotdebugnames{} to \dotdebuginfo}
+The \dotdebugnames{} section offsets lists provide an offset
+for the skeleton compilation unit and eight
+byte signatures for the type units that appear only in the
+\dotdebuginfodwo. The DIE offsets for these
+compilation units and type units refer to the DIEs in the
+\dotdebuginfodwo{} section for the respective
+compilation unit and type units.
+
+\itembfnl{(c) \dotdebuginfo{} skeleton to \dotdebugabbrev}
+The \texttt{debug\_abbrev\_offset} value in the header is
+the offset in the \dotdebugabbrev{} section of the
+abbreviations for that compilation unit skeleton.
+
+\itembfnl{(co) \dotdebuginfodwo{} to \dotdebugabbrevdwo}
+The \texttt{debug\_abbrev\_offset} value in the header
+is the offset in the \dotdebugabbrevdwo{} section of the
+abbreviations for that compilation unit.
+
+\itembfnl{(d) \dotdebuginfo{} to \dotdebugstr}
+Attribute values of class string may have form \DWFORMstrp,
+whose value is an offset in the
+\dotdebugstr{} section of the corresponding string.
+
+\itembfnl{(did) \dotdebuginfo{} to \dotdebuginfodwo}
+The \DWATdwoname{} and \DWATdwoid{} are the file name
+and hash which identify the file with
+the \texttt{.dwo} data. Both \dotdebuginfo{} and
+\dotdebuginfodwo{} compilation units should contain
+\DWATdwoid{} so the two can be matched. \DWATdwoname{}
+is only needed in the \dotdebuginfo{}
+skeleton compilation unit.
+
+\itembfnl{(do) \dotdebuginfodwo{} to \dotdebugstrdwo}
+Attribute values of class string may have form
+\DWFORMstrp, whose value is an offset in the
+\dotdebugstrdwo{} section of the corresponding string.
+
+\itembfnl{(e) \dotdebuginfo{} to \dotdebugstroffsets}
+Attribute values of class string may have form
+\DWFORMstrx, whose value is an index into the
+\dotdebugstroffsets{} section for the corresponding string.
+
+\needlines{4}
+\itembfnl{(eo)\dotdebuginfodwo{} to \dotdebugstroffsetsdwo}
+Attribute values of class string may have form
+\DWFORMstrx, whose value is an index into the
+\dotdebugstroffsetsdwo{} section for the corresponding string.
+
+\itembfnl{(fo) \dotdebuginfodwo{} to \dotdebuginfodwo}
+The operand of the \DWOPcallref{} DWARF expression
+operator is the offset of a debugging
+information entry in the \dotdebuginfodwo{} section of
+another compilation unit. Similarly for attribute
+operands that use \DWFORMrefaddr.
+See Section \refersec{chap:controlflowoperations}.
+
+\itembfnl{(go) \dotdebuginfodwo{} to \dotdebugmacrodwo}
+An attribute of class \CLASSmacptr{} (specifically \DWATmacros{}
+with form \DWFORMsecoffset{}) is an offset within the
+\dotdebugmacrodwo{} section of the beginning of the macro
+information for the referencing unit.
+
+\itembfnl{(h) \dotdebuginfo{} (skeleton) to \dotdebugline}
+An attribute value of class \CLASSlineptr{} (specifically
+\DWATstmtlist{} with form \DWFORMsecoffset)
+is an offset within the \dotdebugline{} section of the
+beginning of the line number information for the
+referencing unit.
+
+\itembfnl{(ho) \dotdebuginfodwo{} to \dotdebuglinedwo{} (skeleton)}
+An attribute value of class \CLASSlineptr{} (specifically
+\DWATstmtlist{} with form \DWFORMsecoffset)
+is an offset within the \dotdebuglinedwo{} section of the
+beginning of the line number header information
+for the referencing unit (the line table details are not in
+\dotdebuglinedwo{} but the line header with its list
+of file names is present).
+
+\itembfnl{(i) \dotdebuginfo{} to \dotdebugranges}
+An attribute value of class \CLASSrangelistptr{}
+(specifically \DWATranges{} with form
+\DWFORMsecoffset) is an offset within the \dotdebugranges{}
+section of a range list.
+
+\itembfnl{(jo) \dotdebuginfodwo{} to \dotdebuglocdwo}
+An attribute value of class \CLASSloclistptr{} (specifically
+\DWATdatamemberlocation,
+\DWATframebase,
+\DWATlocation,
+\DWATreturnaddr,
+\DWATsegment,
+\DWATstaticlink,
+\DWATstringlength,
+\DWATuselocation{} or
+\DWATvtableelemlocation{}
+with form \DWFORMsecoffset) is an offset within the
+\dotdebuglocdwo{} section of a location list. The format of
+\dotdebuglocdwo{} location list entries is slightly different
+than that in \dotdebugloc.
+See Section \refersec{chap:locationlistsinsplitobjects} for details.
+
+\needlines{4}
+\itembfnl{(k) \dotdebuginfo{} to \dotdebugaddr}
+The value of the \DWATaddrbase{} attribute in the
+\DWTAGcompileunit, \DWTAGpartialunit{} or \DWTAGtypeunit{} DIE
+is the offset in the \dotdebugaddr{} section of the machine
+addresses for that unit.
+\DWFORMaddrx, \DWOPaddrx{} and \DWOPconstx{} contain indices
+relative to that offset.
-\end{enumerate}
+\end{description}
\ No newline at end of file
DWARF Git Projects / dwarf-doc.git / commitdiff