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authorAndreas Jaeger <aj@suse.de>2000-02-01 08:28:15 +0000
committerAndreas Jaeger <aj@suse.de>2000-02-01 08:28:15 +0000
commitb42f56c555c48d1040808099321d8dd634187cd6 (patch)
tree8b0b40db771574d03477750be62bf4ee4f914654 /sysdeps/mips
parent613444ea7cee5badcf057b93e896b51e9cb74c0a (diff)
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2000-02-01 Andreas Jaeger <aj@suse.de>
* sysdeps/mips/elf/start.S: Rewritten for __libc_start_main.
Diffstat (limited to 'sysdeps/mips')
-rw-r--r--sysdeps/mips/elf/start.S107
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