2000-02-01 Andreas Jaeger <aj@suse.de>

	* sysdeps/mips/elf/start.S: Rewritten for __libc_start_main.

1 files changed, 26 insertions, 81 deletions

diff --git a/sysdeps/mips/elf/start.S b/sysdeps/mips/elf/start.S
index ce9ad9c..b432953 100644
--- a/sysdeps/mips/elf/start.S
+++ b/sysdeps/mips/elf/start.S
@@ -1,5 +1,5 @@
 /* Startup code compliant to the ELF Mips ABI.
-   Copyright (C) 1995, 1997 Free Software Foundation, Inc.
+   Copyright (C) 1995, 1997, 2000 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -45,6 +45,12 @@
 		stack frame.
 */
 
+
+/* We need to call:
+   __libc_start_main (int (*main) (int, char **, char **), int argc,
+		      char **argv, void (*init) (void), void (*fini) (void),
+		      void (*rtld_fini) (void), void *stack_end)
+*/
 #ifdef PIC
 /* A macro to (re)initialize gp. We can get the run time address of 0f in
    ra ($31) by blezal instruction. In this early phase, we can't save gp
@@ -66,84 +72,28 @@ ENTRY_POINT:
 #endif
 	move $31, $0
 
-	/* $2 contains the address of the shared library termination
-	   function, which we will register with `atexit' to be called by
-	   `exit'.  I suspect that on some systems, and when statically
-	   linked, this will not be set by anything to any function
-	   pointer; hopefully it will be zero so we don't try to call
-	   random pointers.  */
-	beq $2, $0, nofini
-	move $4, $2
-	jal atexit
-#ifdef PIC
-	SET_GP
-#endif
-nofini:
-
-	/* Do essential libc initialization.  In statically linked
-	   programs under the GNU Hurd, this is what sets up the
-	   arguments on the stack for the code below. Since the argument
-	   registers (a0 - a3) saved to the first 4 stack entries by
-	   the prologue of __libc_init_first, we preload them to
-	   prevent clobbering the stack tops. In Hurd case, stack pointer
-	   ($29) may be VM_MAX_ADDRESS here. If so, we must modify it.  */
-#if 0
-	jal mach_host_self
-#endif
-	li $4, 0x80000000
-	bne $29, $4, 1f
-	subu $29, 16
-	sw $0, 0($29)
-	sw $0, 4($29)
-	sw $0, 8($29)
-	sw $0, 12($29)
-1:
-	lw $4, 0($29)
-	lw $5, 4($29)
-	lw $6, 8($29)
-	lw $7, 12($29)
-	jal __libc_init_first
-#ifdef PIC
-	SET_GP
-#endif
-	lw $4, 0($29)
-	lw $5, 4($29)
-	lw $6, 8($29)
-	lw $7, 12($29)
-
-	/* Call `_init', which is the entry point to our own `.init'
-	   section; and register with `atexit' to have `exit' call
-	   `_fini', which is the entry point to our own `.fini' section.  */
-	jal _init
-#ifdef PIC
-	SET_GP
-#endif
 #if (__mips64)
-	dla $4, _fini
-#else  /* __mips64 */
-	la $4, _fini
-#endif  /* __mips64 */
-
-	jal atexit
-#ifdef PIC
-	SET_GP
+	dla $4, main		/* main */
+	lw $5, 0($29)		/* argc */
+	addu $6, $29, 4		/* argv  */
+	/* Allocate space on the stack for seven arguments but align to 32.  */
+	subu $29, 32
+	dla $7, _init		/* init */
+	dla $8, _fini
+#else
+	la $4, main		/* main */
+	lw $5, 0($29)		/* argc */
+	addu $6, $29, 4		/* argv  */
+	/* Allocate space on the stack for seven arguments but align to 32.  */
+	subu $29, 32
+	la $7, _init		/* init */
+	la $8, _fini
 #endif
+	sw $8, 16($29)		/* fini */
+	sw $2, 20($29)		/* rtld_fini */
+	sw $29, 24($29)		/* stack_end */
+	jal __libc_start_main
 
-	/* Extract the arguments and environment as encoded on the stack
-	   and set up the arguments for `main': argc, argv, envp.  */
-	lw $4, 0($29)		/* argc */
-	addu $5, $29, 4		/* argv */
-	sll $6, $4, 2
-	addu $6, $6, 4
-	addu $6, $5, $6		/* envp = &argv[argc + 1] */
-
-	/* Call the user's main function, and exit with its value.  */
-	jal main
-#ifdef PIC
-	SET_GP
-#endif
-	move $4, $2
-	jal exit		/* This should never return.  */
 hlt:	b hlt			/* Crash if somehow it does return.  */
 
 /* Define a symbol for the first piece of initialized data.  */
@@ -153,8 +103,3 @@ __data_start:
 	.long 0
 	.weak data_start
 	data_start = __data_start
-
-	.comm errno, 4, 4
-#ifdef __ELF__
-	.type errno, @object
-#endif