diff options
Diffstat (limited to 'gcc-4.2.1/gcc/ada/symbols-processing-vms-alpha.adb')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/symbols-processing-vms-alpha.adb | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/ada/symbols-processing-vms-alpha.adb b/gcc-4.2.1/gcc/ada/symbols-processing-vms-alpha.adb new file mode 100644 index 000000000..adab774e2 --- /dev/null +++ b/gcc-4.2.1/gcc/ada/symbols-processing-vms-alpha.adb @@ -0,0 +1,235 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y M B O L S . P R O C E S S I N G -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 2003-2005 Free Software Foundation, Inc. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 2, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- +-- for more details. You should have received a copy of the GNU General -- +-- Public License distributed with GNAT; see file COPYING. If not, write -- +-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- +-- Boston, MA 02110-1301, USA. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This is the VMS Alpha version of this package + +separate (Symbols) +package body Processing is + + type Number is mod 2**16; + -- 16 bits unsigned number for number of characters + + GSD : constant Number := 10; + -- Code for the Global Symbol Definition section + + C_SYM : constant Number := 1; + -- Code for a Symbol subsection + + V_DEF_Mask : constant Number := 2**1; + V_NORM_Mask : constant Number := 2**6; + + B : Byte; + + Number_Of_Characters : Natural := 0; + -- The number of characters of each section + + -- The following variables are used by procedure Process when reading an + -- object file. + + Code : Number := 0; + Length : Natural := 0; + + Dummy : Number; + + Nchars : Natural := 0; + Flags : Number := 0; + + Symbol : String (1 .. 255); + LSymb : Natural; + + procedure Get (N : out Number); + -- Read two bytes from the object file LSB first as unsigned 16 bit number + + procedure Get (N : out Natural); + -- Read two bytes from the object file, LSByte first, as a Natural + + --------- + -- Get -- + --------- + + procedure Get (N : out Number) is + C : Byte; + LSByte : Number; + begin + Read (File, C); + LSByte := Byte'Pos (C); + Read (File, C); + N := LSByte + (256 * Byte'Pos (C)); + end Get; + + procedure Get (N : out Natural) is + Result : Number; + begin + Get (Result); + N := Natural (Result); + end Get; + + ------------- + -- Process -- + ------------- + + procedure Process + (Object_File : String; + Success : out Boolean) + is + begin + -- Open the object file with Byte_IO. Return with Success = False if + -- this fails. + + begin + Open (File, In_File, Object_File); + exception + when others => + Put_Line + ("*** Unable to open object file """ & Object_File & """"); + Success := False; + return; + end; + + -- Assume that the object file has a correct format + + Success := True; + + -- Get the different sections one by one from the object file + + while not End_Of_File (File) loop + + Get (Code); + Get (Number_Of_Characters); + Number_Of_Characters := Number_Of_Characters - 4; + + -- If this is not a Global Symbol Definition section, skip to the + -- next section. + + if Code /= GSD then + + for J in 1 .. Number_Of_Characters loop + Read (File, B); + end loop; + + else + + -- Skip over the next 4 bytes + + Get (Dummy); + Get (Dummy); + Number_Of_Characters := Number_Of_Characters - 4; + + -- Get each subsection in turn + + loop + Get (Code); + Get (Nchars); + Get (Dummy); + Get (Flags); + Number_Of_Characters := Number_Of_Characters - 8; + Nchars := Nchars - 8; + + -- If this is a symbol and the V_DEF flag is set, get the + -- symbol. + + if Code = C_SYM and then ((Flags and V_DEF_Mask) /= 0) then + -- First, reach the symbol length + + for J in 1 .. 25 loop + Read (File, B); + Nchars := Nchars - 1; + Number_Of_Characters := Number_Of_Characters - 1; + end loop; + + Length := Byte'Pos (B); + LSymb := 0; + + -- Get the symbol characters + + for J in 1 .. Nchars loop + Read (File, B); + Number_Of_Characters := Number_Of_Characters - 1; + if Length > 0 then + LSymb := LSymb + 1; + Symbol (LSymb) := B; + Length := Length - 1; + end if; + end loop; + + -- Create the new Symbol + + declare + S_Data : Symbol_Data; + begin + S_Data.Name := new String'(Symbol (1 .. LSymb)); + + -- The symbol kind (Data or Procedure) depends on the + -- V_NORM flag. + + if (Flags and V_NORM_Mask) = 0 then + S_Data.Kind := Data; + + else + S_Data.Kind := Proc; + end if; + + -- Put the new symbol in the table + + Symbol_Table.Increment_Last (Complete_Symbols); + Complete_Symbols.Table + (Symbol_Table.Last (Complete_Symbols)) := S_Data; + end; + + else + -- As it is not a symbol subsection, skip to the next + -- subsection. + + for J in 1 .. Nchars loop + Read (File, B); + Number_Of_Characters := Number_Of_Characters - 1; + end loop; + end if; + + -- Exit the GSD section when number of characters reaches 0 + + exit when Number_Of_Characters = 0; + end loop; + end if; + end loop; + + -- The object file has been processed, close it + + Close (File); + + exception + -- For any exception, output an error message, close the object file + -- and return with Success = False. + + when X : others => + Put_Line ("unexpected exception raised while processing """ + & Object_File & """"); + Put_Line (Exception_Information (X)); + Close (File); + Success := False; + end Process; + +end Processing; |