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* stabs.texinfo (Local Variable Parameters): Re-write paragraph on

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floats passed as doubles (to improve clarity).
This commit is contained in:
Jim Kingdon 1993-10-21 14:20:50 +00:00
parent bf96935bbc
commit e252598636
1 changed files with 7 additions and 5 deletions
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gdb/doc/stabs.texinfo
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@ -1107,15 +1107,17 @@ subr (f)
@{
@end example
if @code{f} gets allocated in a register, then its stabs look like:
if @code{f} is passed as a double at stack offset 8, and the prologue
converts it to a float in register number 0, then the stabs look like:
@c FIXME: Probably should run this through the compiler and get the
@c whole thing including ".stabs" and so on.
@example
f:p13 # @r{where 13 is double}
f:r12 # @r{where 12 is float}
.stabs "f:p13",160,0,3,8 # @r{160 is @code{N_PSYM}, here 13 is @code{double}}
.stabs "f:r12",64,0,3,0 # @r{64 is @code{N_RSYM}, here 12 is @code{float}}
@end example
In both stabs 3 is the line number where @code{f} is declared
(@pxref{Line Numbers}).
@findex N_LSYM, for parameter
GCC, at least on the 960, has another solution to the same problem. It
uses a single @samp{p} symbol descriptor for an argument which is stored