From 266f95411b8044ac934e19580de1d25b481aa06f Mon Sep 17 00:00:00 2001 From: Jim Wilson Date: Fri, 5 Feb 1993 15:50:44 -0800 Subject: [PATCH] Initial revision From-SVN: r3431 --- gcc/config/i386/sol2-c1.asm | 155 ++++++++++++++++++++++++++++++++++++ gcc/config/i386/sol2-ci.asm | 50 ++++++++++++ gcc/config/i386/sol2-cn.asm | 45 +++++++++++ gcc/config/i386/sol2.h | 33 ++++++++ gcc/config/i386/t-sol2 | 28 +++++++ 5 files changed, 311 insertions(+) create mode 100644 gcc/config/i386/sol2-c1.asm create mode 100644 gcc/config/i386/sol2-ci.asm create mode 100644 gcc/config/i386/sol2-cn.asm create mode 100644 gcc/config/i386/sol2.h create mode 100644 gcc/config/i386/t-sol2 diff --git a/gcc/config/i386/sol2-c1.asm b/gcc/config/i386/sol2-c1.asm new file mode 100644 index 00000000000..bd7c737cc02 --- /dev/null +++ b/gcc/config/i386/sol2-c1.asm @@ -0,0 +1,155 @@ +! crt1.s for Solaris 2, x86 + +! Copyright (C) 1993 Free Software Foundation, Inc. +! Written By Fred Fish, Nov 1992 +! +! This file is free software; you can redistribute it and/or modify it +! under the terms of the GNU General Public License as published by the +! Free Software Foundation; either version 2, or (at your option) any +! later version. +! +! In addition to the permissions in the GNU General Public License, the +! Free Software Foundation gives you unlimited permission to link the +! compiled version of this file with other programs, and to distribute +! those programs without any restriction coming from the use of this +! file. (The General Public License restrictions do apply in other +! respects; for example, they cover modification of the file, and +! distribution when not linked into another program.) +! +! This file is distributed in the hope that it will be useful, but +! WITHOUT 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 +! along with this program; see the file COPYING. If not, write to +! the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. +! +! As a special exception, if you link this library with files +! compiled with GCC to produce an executable, this does not cause +! the resulting executable to be covered by the GNU General Public License. +! This exception does not however invalidate any other reasons why +! the executable file might be covered by the GNU General Public License. +! + +! This file takes control of the process from the kernel, as specified +! in section 3 of the System V Application Binary Interface, Intel386 +! Processor Supplement. It has been constructed from information obtained +! from the ABI, information obtained from single stepping existing +! Solaris executables through their startup code with gdb, and from +! information obtained by single stepping executables on other i386 SVR4 +! implementations. This file is the first thing linked into any executable. + + .file "crt1.s" + .ident "GNU C crt1.s" + .weak _cleanup + .weak _DYNAMIC + .text + +! Start creating the initial frame by pushing a NULL value for the return +! address of the initial frame, and mark the end of the stack frame chain +! (the innermost stack frame) with a NULL value, per page 3-32 of the ABI. +! Initialize the first stack frame pointer in %ebp (the contents of which +! are unspecified at process initialization). + + .globl _start +_start: + pushl $0x0 + pushl $0x0 + movl %esp,%ebp + +! As specified per page 3-32 of the ABI, %edx contains a function +! pointer that should be registered with atexit(), for proper +! shared object termination. Just push it onto the stack for now +! to preserve it. We want to register _cleanup() first. + + pushl %edx + +! Check to see if there is an _cleanup() function linked in, and if +! so, register it with atexit() as the last thing to be run by +! atexit(). + + movl $_cleanup,%eax + testl %eax,%eax + je .L1 + pushl $_cleanup + call atexit + addl $0x4,%esp +.L1: + +! Now check to see if we have an _DYNAMIC table, and if so then +! we need to register the function pointer previously in %edx, but +! now conveniently saved on the stack as the argument to pass to +! atexit(). + + movl $_DYNAMIC,%eax + testl %eax,%eax + je .L2 + call atexit +.L2: + +! Register _fini() with atexit(). We will take care of calling _init() +! directly. + + pushl $_fini + call atexit + +! Compute the address of the environment vector on the stack and load +! it into the global variable _environ. Currently argc is at 8 off +! the frame pointer. Fetch the argument count into %eax, scale by the +! size of each arg (4 bytes) and compute the address of the environment +! vector which is 16 bytes (the two zero words we pushed, plus argc, +! plus the null word terminating the arg vector) further up the stack, +! off the frame pointer (whew!). + + movl 8(%ebp),%eax + leal 16(%ebp,%eax,4),%edx + movl %edx,_environ + +! Push the environment vector pointer, the argument vector pointer, +! and the argument count on to the stack to set up the arguments +! for _init(), _fpstart(), and main(). Note that the environment +! vector pointer and the arg count were previously loaded into +! %edx and %eax respectively. The only new value we need to compute +! is the argument vector pointer, which is at a fixed address off +! the initial frame pointer. + + pushl %edx + leal 12(%ebp),%edx + pushl %edx + pushl %eax + +! Call _init(argc, argv, environ), _fpstart(argc, argv, environ), and +! main(argc, argv, environ). + + call _init + call __fpstart + call main + +! Pop the argc, argv, and environ arguments off the stack, push the +! value returned from main(), and call exit(). + + addl $12,%esp + pushl %eax + call exit + +! An inline equivalent of _exit, as specified in Figure 3-26 of the ABI. + + pushl $0x0 + movl $0x1,%eax + lcall $7,$0 + +! If all else fails, just try a halt! + + hlt + .type _start,@function + .size _start,.-_start + +! A dummy profiling support routine for non-profiling executables, +! in case we link in some objects that have been compiled for profiling. + + .globl _mcount +_mcount: + ret + .type _mcount,@function + .size _mcount,.-_mcount diff --git a/gcc/config/i386/sol2-ci.asm b/gcc/config/i386/sol2-ci.asm new file mode 100644 index 00000000000..0d9b71850a4 --- /dev/null +++ b/gcc/config/i386/sol2-ci.asm @@ -0,0 +1,50 @@ +! crti.s for Solaris 2, x86. + +! Copyright (C) 1993 Free Software Foundation, Inc. +! Written By Fred Fish, Nov 1992 +! +! This file is free software; you can redistribute it and/or modify it +! under the terms of the GNU General Public License as published by the +! Free Software Foundation; either version 2, or (at your option) any +! later version. +! +! In addition to the permissions in the GNU General Public License, the +! Free Software Foundation gives you unlimited permission to link the +! compiled version of this file with other programs, and to distribute +! those programs without any restriction coming from the use of this +! file. (The General Public License restrictions do apply in other +! respects; for example, they cover modification of the file, and +! distribution when not linked into another program.) +! +! This file is distributed in the hope that it will be useful, but +! WITHOUT 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 +! along with this program; see the file COPYING. If not, write to +! the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. +! +! As a special exception, if you link this library with files +! compiled with GCC to produce an executable, this does not cause +! the resulting executable to be covered by the GNU General Public License. +! This exception does not however invalidate any other reasons why +! the executable file might be covered by the GNU General Public License. +! + +! This file just supplies labeled starting points for the .init and .fini +! sections. It is linked in before the values-Xx.o files and also before +! crtbegin.o. + + .file "crti.s" + .ident "GNU C crti.s" + + .section .init + .globl _init + .type _init,@function +_init: + + .section .fini + .globl _fini + .type _fini,@function +_fini: diff --git a/gcc/config/i386/sol2-cn.asm b/gcc/config/i386/sol2-cn.asm new file mode 100644 index 00000000000..e55eac28bba --- /dev/null +++ b/gcc/config/i386/sol2-cn.asm @@ -0,0 +1,45 @@ +! crtn.s for Solaris 2, x86. + +! Copyright (C) 1993 Free Software Foundation, Inc. +! Written By Fred Fish, Nov 1992 +! +! This file is free software; you can redistribute it and/or modify it +! under the terms of the GNU General Public License as published by the +! Free Software Foundation; either version 2, or (at your option) any +! later version. +! +! In addition to the permissions in the GNU General Public License, the +! Free Software Foundation gives you unlimited permission to link the +! compiled version of this file with other programs, and to distribute +! those programs without any restriction coming from the use of this +! file. (The General Public License restrictions do apply in other +! respects; for example, they cover modification of the file, and +! distribution when not linked into another program.) +! +! This file is distributed in the hope that it will be useful, but +! WITHOUT 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 +! along with this program; see the file COPYING. If not, write to +! the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. +! +! As a special exception, if you link this library with files +! compiled with GCC to produce an executable, this does not cause +! the resulting executable to be covered by the GNU General Public License. +! This exception does not however invalidate any other reasons why +! the executable file might be covered by the GNU General Public License. +! + +! This file just supplies returns for the .init and .fini sections. It is +! linked in after all other files. + + .file "crtn.o" + .ident "GNU C crtn.o" + + .section .init + ret $0x0 + + .section .fini + ret $0x0 diff --git a/gcc/config/i386/sol2.h b/gcc/config/i386/sol2.h new file mode 100644 index 00000000000..126bd0851eb --- /dev/null +++ b/gcc/config/i386/sol2.h @@ -0,0 +1,33 @@ +/* Target definitions for GNU compiler for Intel 80386 running Solaris 2 + Copyright (C) 1993 Free Software Foundation, Inc. + + Written by Fred Fish (fnf@cygnus.com). + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT 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 +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include "i386/sysv4.h" + +/* The Solaris 2.0 x86 linker botches alignment of code sections. + It tries to align to a 16 byte boundary by padding with 0x00000090 + ints, rather than 0x90 bytes (nop). This generates trash in the + ".init" section since the contribution from crtbegin.o is only 7 + bytes. The linker pads it to 16 bytes with a single 0x90 byte, and + two 0x00000090 ints, which generates a segmentation violation when + executed. This macro forces the assembler to do the padding, since + it knows what it is doing. */ + +#define FORCE_INIT_SECTION_ALIGN do { asm (ALIGN_ASM_OP ## " 16"); } while (0) diff --git a/gcc/config/i386/t-sol2 b/gcc/config/i386/t-sol2 new file mode 100644 index 00000000000..972fd73cbe5 --- /dev/null +++ b/gcc/config/i386/t-sol2 @@ -0,0 +1,28 @@ +# We need startup files for Solaris, since we don't get them with the system +# FIXME: Should include "gmon.o" when it is ported. + +EXTRA_PARTS=crt1.o crti.o crtn.o crtbegin.o crtend.o + +# we need to supply our own assembly versions of libgcc1.c files, +# since the user may not have native 'cc' available + +LIBGCC1 = libgcc1.null + +# gmon build rule: +gmon.o: $(srcdir)/config/i386/gmon-sol2.c $(GCC_PASSES) $(CONFIG_H) + $(GCC_FOR_TARGET) $(GCC_CFLAGS) $(INCLUDES) \ + -c $(srcdir)/config/i386/gmon-sol2.c -o gmon.o + +# Assemble startup files. +# Apparently Sun believes that assembler files don't need comments, because no +# single ASCII character is valid (tried them all). So we manually strip out +# the comments with sed. This bug may only be in the Early Access releases. +crt1.o: $(srcdir)/config/i386/sol2-c1.asm + sed -e '/^!/d' <$(srcdir)/config/i386/sol2-c1.asm >crt1.s + $(AS) -o crt1.o crt1.s +crti.o: $(srcdir)/config/i386/sol2-ci.asm + sed -e '/^!/d' <$(srcdir)/config/i386/sol2-ci.asm >crti.s + $(AS) -o crti.o crti.s +crtn.o: $(srcdir)/config/i386/sol2-cn.asm + sed -e '/^!/d' <$(srcdir)/config/i386/sol2-cn.asm >crtn.s + $(AS) -o crtn.o crtn.s