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* stabs.texinfo (Parameters): Add "(sometimes)" when describing

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gcc2 behavior with promoted args.
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Jim Kingdon 1993-05-18 23:01:58 +00:00
parent 31d16514c8
commit 23aed4497c
2 changed files with 15 additions and 10 deletions
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5
gdb/doc/ChangeLog
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@ -1,3 +1,8 @@
Tue May 18 17:59:18 1993 Jim Kingdon (kingdon@lioth.cygnus.com)
* stabs.texinfo (Parameters): Add "(sometimes)" when describing
gcc2 behavior with promoted args.
Fri May 14 21:35:29 1993 Roland H. Pesch (pesch@fowanton.cygnus.com)
* gdb.texinfo: include readline appendices in info version of manual

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gdb/doc/stabs.texinfo
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@ -1099,7 +1099,7 @@ handle either one. Symbol type @samp{C_RPSYM} is used with @samp{R} and
AIX, according to the documentation, uses @samp{D} for a parameter
passed in a floating point register. This strikes me as incredibly
bogus---why doesn't it just use @samp{R} with a register number which
indicates that it's a floating point register. I haven't verified
indicates that it's a floating point register? I haven't verified
whether the system actually does what the documentation indicates.
There is at least one case where GCC uses a @samp{p}/@samp{r} pair
@ -1127,15 +1127,15 @@ stores it as a local variable. If possible, the compiler should claim
that it's in a register, but this isn't always done. Some compilers use
the pair of symbols approach described above ("arg:p" followed by
"arg:"); this includes gcc1 (not gcc2) on the sparc when passing a small
structure and gcc2 when the argument type is float and it is passed as a
double and converted to float by the prologue (in the latter case the
type of the "arg:p" symbol is double and the type of the "arg:" symbol
is float). GCC, at least on the 960, uses a single @samp{p} symbol
descriptor for an argument which is stored as a local variable but uses
@samp{N_LSYM} instead of @samp{N_PSYM}. In this case the value of the
symbol is an offset relative to the local variables for that function,
not relative to the arguments (on some machines those are the same
thing, but not on all).
structure and gcc2 (sometimes) when the argument type is float and it is
passed as a double and converted to float by the prologue (in the latter
case the type of the "arg:p" symbol is double and the type of the "arg:"
symbol is float). GCC, at least on the 960, uses a single @samp{p}
symbol descriptor for an argument which is stored as a local variable
but uses @samp{N_LSYM} instead of @samp{N_PSYM}. In this case the value
of the symbol is an offset relative to the local variables for that
function, not relative to the arguments (on some machines those are the
same thing, but not on all).
If the parameter is passed by reference (e.g. Pascal VAR parameters),
then type symbol descriptor is @samp{v} if it is in the argument list,