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* stabs.texinfo (Common Blocks): Minor cleanups.

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Jim Kingdon 1993-10-12 19:03:38 +00:00
parent 2145a18385
commit 05238df4e2
2 changed files with 17 additions and 9 deletions
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gdb/doc/ChangeLog
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@ -1,5 +1,7 @@
Tue Oct 12 09:11:45 1993 Jim Kingdon (kingdon@lioth.cygnus.com)
* stabs.texinfo (Common Blocks): Minor cleanups.
* stabs.texinfo: Update ld stabs in elf relocation to reflect the fact
that Sun has backed away from the linker kludge and thus the relevant
issue is changes to the SunPRO tools, not the Solaris linker.

24
gdb/doc/stabs.texinfo
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@ -858,20 +858,26 @@ I believe Fortran is the only language with this feature.
@findex N_BCOMM
@findex N_ECOMM
@findex C_BCOMM
@findex C_ECOMM
A @code{N_BCOMM} stab begins a common block and an @code{N_ECOMM} stab
ends it. The only field that is significant in these two stabs is the
string, which names a normal (non-debugging) symbol that gives the
address of the common block.
address of the common block. According to IBM documentation, only the
@code{N_BCOMM} has the name of the common block (even though their
compiler actually puts it both places).
@findex N_ECOML
Each stab between the @code{N_BCOMM} and the @code{N_ECOMM} specifies a
member of that common block; its value is the offset within the
common block of that variable. The @code{N_ECOML} stab type is
documented for this purpose, but Sun's Fortran compiler uses
@code{N_GSYM} instead. The test case I looked at had a common block
local to a function and it used the @samp{V} symbol descriptor; I assume
one would use @samp{S} if not local to a function (that is, if a common
block @emph{can} be anything other than local to a function).
@findex C_ECOML
The stabs for the members of the common block are between the
@code{N_BCOMM} and the @code{N_ECOMM}; the value of each stab is the
offset within the common block of that variable. IBM uses the
@code{C_ECOML} stab type, and there is a corresponding @code{N_ECOML}
stab type, but Sun's Fortran compiler uses @code{N_GSYM} instead. The
variables within a common block use the @samp{V} symbol descriptor (I
believe this is true of all Fortran variables). Other stabs (at least
type declarations using @code{C_DECL}) can also be between the
@code{N_BCOMM} and the @code{N_ECOMM}.
@node Statics
@section Static Variables