diff options
Diffstat (limited to 'sysdeps/m68k/elf')
| -rw-r--r-- | sysdeps/m68k/elf/start.S | 54 |
1 files changed, 21 insertions, 33 deletions
diff --git a/sysdeps/m68k/elf/start.S b/sysdeps/m68k/elf/start.S index 6c7cd4b99d..c1a5c2e48f 100644 --- a/sysdeps/m68k/elf/start.S +++ b/sysdeps/m68k/elf/start.S @@ -1,5 +1,5 @@ /* Startup code compliant to the ELF m68k ABI. - Copyright (C) 1996, 1997 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998 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 @@ -43,43 +43,31 @@ _start: the outermost frame obviously. */ sub.l %fp, %fp - /* %a1 contains the address of the shared library termination - function, which we will register with `atexit' to be called by - `exit'. */ - tstl %a1 - jbeq 1f - move.l %a1, -(%sp) - jbsr atexit - addql #4, %sp -1: + /* Extract the arguments as encoded on the stack and set up the + arguments for `main': argc, argv. envp will be determined + later in __libc_start_main. */ + move.l (%sp)+, %d0 /* Pop the argument count. */ + move.l %sp, %a0 /* The argument vector starts just at the + current stack top. */ - /* 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. */ - jbsr __libc_init_first + pea (%a1) /* Push address of the shared library + termination function. */ - /* Extract the arguments and environment as encoded on the stack - and set up the arguments for `main': argc, argv, envp. */ - move.l (%sp)+, %d0 /* Pop the argument count. */ - lea (4,%sp,%d0*4), %a0 /* envp = &argv[argc + 1] */ - move.l %a0, _environ /* Store it in the global variable. */ - pea (%a0) /* Push third argument: envp. */ - pea 4(%sp) /* Push second argument: argv. */ + /* Push the address of our own entry points to `.fini' and + `.init'. */ + pea _fini + pea _init + + pea (%a0) /* Push second argument: argv. */ move.l %d0, -(%sp) /* Push first argument: argc. */ - /* 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. */ - jbsr _init - move.l #_fini, -(%sp) - jbsr atexit - addq.l #4, %sp + pea main + + /* Call the user's main function, and exit with its value. But + let the libc call main. */ + jbsr __libc_start_main - /* Call the user's main function, and exit with its value. */ - jbsr main - move.l %d0, (%sp) -1: jbsr exit /* This should never return. */ - jbra 1b /* Try again if somehow it does return. */ + illegal /* Crash if somehow `exit' does return. */ /* Define a symbol for the first piece of initialized data. */ .data |