summary refs log tree commit diff
path: root/sysdeps/ia64/elf/start.S
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/ia64/elf/start.S')
-rw-r--r--sysdeps/ia64/elf/start.S84
1 files changed, 84 insertions, 0 deletions
diff --git a/sysdeps/ia64/elf/start.S b/sysdeps/ia64/elf/start.S
new file mode 100644
index 0000000000..424fae8471
--- /dev/null
+++ b/sysdeps/ia64/elf/start.S
@@ -0,0 +1,84 @@
+/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Written by Jes Sorensen, <Jes.Sorensen@cern.ch>, April 1999.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <asm/unistd.h>
+#include <asm/fpu.h>
+
+/*
+ * Arguments for __libc_start_main:
+ *	out0:	main
+ *	out1:	argc
+ *	out2:	argv
+ *	out3:	init
+ *	out4:	fini
+ *	out5:	rtld_fini
+ *	out6:	stack_end
+ */
+
+	.psr	abi64
+	.psr	lsb
+	.lsb
+
+	.text
+
+	.global	_start#
+	.proc	_start#
+
+_start:
+	{ .mlx
+	  alloc r2 = ar.pfs,0,0,7,0
+	  movl r3 = FPSR_DEFAULT
+	}
+	{ .mlx
+	  adds out2 = 16, sp	/* get address of argc value */
+	  movl gp = @gprel(0f)
+	  ;;
+	}
+0:	{ .mii
+	  ld8 out1 = [out2], 8	/* load argc and move out2 to become argv */
+	  mov r9 = ip
+	  ;;
+	  sub gp = r9, gp	/* back-compute gp value */
+	  ;;
+	}
+	{ .mfi
+	  mov ar.fpsr = r3
+	  addl out0 = @ltoff(@fptr(main#)), gp
+	}
+	{ .mfi
+	  addl out4 = @ltoff(@fptr(_fini#)), gp
+	  addl out3 = @ltoff(@fptr(_init#)), gp
+	  ;;
+	}
+	{ .mmi
+	  ld8 out0 = [out0]	/* pointer to `main' function descriptor */
+	  ld8 out3 = [out3]	/* pointer to `init' function descriptor */
+	  adds out6 = 16, sp	/* highest non-environment stack address */
+	}
+	{ .mib
+	  ld8 out4 = [out4]	/* pointer to `fini' function descriptor */
+	  mov out5 = ret0	/* dynamic linker destructor */
+	  br.call.sptk.few rp = __libc_start_main#
+	}
+	{ .mib
+	  mov rp = r0
+	  br.ret.sptk.few rp	/* break miserably if we ever return */
+	  ;;
+	}
+	.endp	_start#