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+#
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+# $Id$
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+# This file is part of the Free Pascal run time library.
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+# Copyright (c) 2002 by Florian Klaempfl
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+# members of the Free Pascal development team.
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+#
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+# See the file COPYING.FPC, included in this distribution,
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+# for details about the copyright.
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+#
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+# This program is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY;without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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+#
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+#**********************************************************************}
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+#
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+# Linux ELF startup code for Free Pascal
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+#
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+
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+/* This is the canonical entry point, usually the first thing in the text
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+ segment. The SVR4/i386 ABI (pages 3-31, 3-32) says that when the entry
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+ point runs, most registers' values are unspecified, except for:
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+
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+ %rdx Contains a function pointer to be registered with `atexit'.
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+ This is how the dynamic linker arranges to have DT_FINI
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+ functions called for shared libraries that have been loaded
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+ before this code runs.
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+
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+ %rsp The stack contains the arguments and environment:
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+ 0(%rsp) argc
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+ 8(%rsp) argv[0]
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+ ...
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+ (8*argc)(%rsp) NULL
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+ (8*(argc+1))(%rsp) envp[0]
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+ ...
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+ NULL
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+*/
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+
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+ .text
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+ .globl _start
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+ .type _start,@function
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+_start:
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+# movq %rdx,%r9 /* Address of the shared library termination
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+# function. */
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+ popq %rsi /* Pop the argument count. */
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+ movq %rsi,U_SYSTEM_ARGC
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+ movq %rsp,U_SYSTEM_ARGV /* argv starts just at the current stack top. */
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+ leaq 8(%rsi,,8),%rax
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+ addq %esp,%rax
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+ movq %rax,U_SYSTEM_ENVP
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+ andq $~15,%rsp /* Align the stack to a 16 byte boundary to follow the ABI. */
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+
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+/* !!!! CPU initialization? */
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+
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+ xorq %rbp, %rbp
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+ call PASCALMAIN
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+
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+ hlt /* Crash if somehow `exit' does return. */
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+
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+/*!!!! hlt syscall? */
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+
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+/* Define a symbol for the first piece of initialized data. */
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+ .data
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+ .globl __data_start
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+__data_start:
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+ .long 0
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+ .weak data_start
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+ data_start = __data_start
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+#
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+# $Log$
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+# Revision 1.1 2003-01-06 19:33:10 florian
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+# + initial revision
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+#
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+#
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