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* gdb.texinfo (SVR4 Process Information, The isatty call)

Browse source 
(The system call): Don't use foo(N) notation for man pages and
	functions.
	(Compilation, DJGPP Native): Improve wording.
This commit is contained in:
Eli Zaretskii 2005-05-02 20:28:48 +00:00
parent 079c8cd052
commit 514c4d7110
2 changed files with 30 additions and 23 deletions
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1
gdb/doc/ChangeLog
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@ -3,6 +3,7 @@
* gdb.texinfo (SVR4 Process Information, The isatty call)
(The system call): Don't use foo(N) notation for man pages and
functions.
(Compilation, DJGPP Native): Improve wording.
2005-04-27 Eli Zaretskii <eliz@gnu.org>

52
gdb/doc/gdb.texinfo
View file

@ -1643,21 +1643,13 @@ and addresses in the executable code.
To request debugging information, specify the @samp{-g} option when you run
the compiler.
Most compilers do not include information about preprocessor macros in
the debugging information if you specify the @option{-g} flag alone,
because this information is rather large. Version 3.1 of @value{NGCC},
the @sc{gnu} C compiler, provides macro information if you specify the
options @option{-gdwarf-2} and @option{-g3}; the former option requests
debugging information in the Dwarf 2 format, and the latter requests
``extra information''. In the future, we hope to find more compact ways
to represent macro information, so that it can be included with
@option{-g} alone.
Many C compilers are unable to handle the @samp{-g} and @samp{-O}
options together. Using those compilers, you cannot generate optimized
Programs that are to be shipped to your customers are compiled with
optimizations, using the @samp{-O} compiler option. However, many
compilers are unable to handle the @samp{-g} and @samp{-O} options
together. Using those compilers, you cannot generate optimized
executables containing debugging information.
@value{NGCC}, the @sc{gnu} C compiler, supports @samp{-g} with or
@value{NGCC}, the @sc{gnu} C/C@t{++} compiler, supports @samp{-g} with or
without @samp{-O}, making it possible to debug optimized code. We
recommend that you @emph{always} use @samp{-g} whenever you compile a
program. You may think your program is correct, but there is no sense
@ -1682,6 +1674,18 @@ Older versions of the @sc{gnu} C compiler permitted a variant option
@w{@samp{-gg}} for debugging information. @value{GDBN} no longer supports this
format; if your @sc{gnu} C compiler has this option, do not use it.
@value{GDBN} knows about preprocessor macros and can show you their
expansion (@pxref{Macros}). Most compilers do not include information
about preprocessor macros in the debugging information if you specify
the @option{-g} flag alone, because this information is rather large.
Version 3.1 and later of @value{NGCC}, the @sc{gnu} C compiler,
provides macro information if you specify the options
@option{-gdwarf-2} and @option{-g3}; the former option requests
debugging information in the Dwarf 2 format, and the latter requests
``extra information''. In the future, we hope to find more compact
ways to represent macro information, so that it can be included with
@option{-g} alone.
@need 2000
@node Starting
@section Starting your program
@ -12656,7 +12660,8 @@ For QNX Neutrino only, this command displays the list of all mapinfos.
@cindex native @sc{djgpp} debugging
@cindex MS-DOS-specific commands
@sc{djgpp} is the port of @sc{gnu} development tools to MS-DOS and
@cindex DPMI
@sc{djgpp} is a port of the @sc{gnu} development tools to MS-DOS and
MS-Windows. @sc{djgpp} programs are 32-bit protected-mode programs
that use the @dfn{DPMI} (DOS Protected-Mode Interface) API to run on
top of real-mode DOS systems and their emulations.
@ -12748,11 +12753,11 @@ These commands are supported only with some DPMI servers.
@cindex physical address from linear address
@item info dos address-pte @var{addr}
This command displays the Page Table entry for a specified linear
address. The argument linear address @var{addr} should already have the
appropriate segment's base address added to it, because this command
accepts addresses which may belong to @emph{any} segment. For
example, here's how to display the Page Table entry for the page where
the variable @code{i} is stored:
address. The argument @var{addr} is a linear address which should
already have the appropriate segment's base address added to it,
because this command accepts addresses which may belong to @emph{any}
segment. For example, here's how to display the Page Table entry for
the page where a variable @code{i} is stored:
@smallexample
@exdent @code{(@value{GDBP}) info dos address-pte __djgpp_base_address + (char *)&i}
@ -12762,7 +12767,7 @@ the variable @code{i} is stored:
@noindent
This says that @code{i} is stored at offset @code{0xd30} from the page
whose physical base address is @code{0x02698000}, and prints all the
whose physical base address is @code{0x02698000}, and shows all the
attributes of that page.
Note that you must cast the addresses of variables to a @code{char *},
@ -12783,9 +12788,10 @@ transfer buffer:
@noindent
(The @code{+ 3} offset is because the transfer buffer's address is the
3rd member of the @code{_go32_info_block} structure.) The output of
this command clearly shows that addresses in conventional memory are
mapped 1:1, i.e.@: the physical and linear addresses are identical.
3rd member of the @code{_go32_info_block} structure.) The output
clearly shows that this DPMI server maps the addresses in conventional
memory 1:1, i.e.@: the physical (@code{0x00029000} + @code{0x110}) and
linear (@code{0x29110}) addresses are identical.
This command is supported only with some DPMI servers.
@end table