diff options
| author | Eric Andersen <andersen@codepoet.org> | 2002-10-01 05:30:25 +0000 |
|---|---|---|
| committer | Eric Andersen <andersen@codepoet.org> | 2002-10-01 05:30:25 +0000 |
| commit | b58a631942341b6ccb62ab400e862f404e22dbbf (patch) | |
| tree | 0c6e622729b6c98417a15c0b7c10279c17ca0038 /libc/sysdeps/linux/sh/crt0.S | |
| parent | 351c1d9029844a97d2771da883fc2b432d5e1bd4 (diff) | |
This commit contains a patch from Stefan Allius <allius@atecom.com> to change
how uClibc handles _init and _fini, allowing shared lib constructors and
destructors to initialize things in the correct sequence. Stefan ported the SH
architecture. I then ported x86, arm, and mips. x86 and arm are working fine,
but I don't think I quite got things correct for mips.
Diffstat (limited to 'libc/sysdeps/linux/sh/crt0.S')
| -rw-r--r-- | libc/sysdeps/linux/sh/crt0.S | 49 |
1 files changed, 30 insertions, 19 deletions
diff --git a/libc/sysdeps/linux/sh/crt0.S b/libc/sysdeps/linux/sh/crt0.S index 10915d545..e74ae86c4 100644 --- a/libc/sysdeps/linux/sh/crt0.S +++ b/libc/sysdeps/linux/sh/crt0.S @@ -26,13 +26,6 @@ At this entry point, most registers' values are unspecified, except: - r4 Contains a function pointer to be registered with `atexit'. - This is how the dynamic linker arranges to have DT_FINI - functions called for shared libraries that have been loaded - before this code runs. - WARNING: At that stage only static linker is supported. For - uCLinux we won't bother with r4. - sp The stack contains the arguments and environment: 0(sp) argc 4(sp) argv[0] @@ -42,18 +35,26 @@ ... NULL */ + .file "crt0.S" .text .globl _start .type _start,@function .size _start,_start_end - _start _start: - /* Clear the frame pointer since this is the outermost frame. (in delay slot) */ + /* Clear the frame pointer since this is the outermost frame. */ mov #0, r14 /* Pop argc off the stack and save a pointer to argv */ mov.l @r15+,r4 mov r15, r5 + /* Push the finip argument to __uClibc_start_main() onto the stack */ + mov.l L_fini,r6 + mov.l r6,@-r15 + + /* Setup the value for the initp argument */ + mov.l L_init, r7 + /* * Setup the value for the environment pointer: * r6 = (argc + 1) * 4 @@ -62,27 +63,39 @@ _start: mov r4,r6 add #1,r6 shll2 r6 - add r5,r6 - /* call main */ + /* jump to __uClibc_start_main (argc, argv, envp, app_init, app_fini) */ mov.l L_main, r0 jsr @r0 - nop /* delay slot */ - + add r5, r6 /* delay slot */ /* We should not get here. */ mov.l L_abort, r0 - jsr @r0 - nop /* delay slot */ + jmp @r0 + nop _start_end: .align 2 + .weak _init + .type _init,@function +_init: + rts + nop + +.Lfe1: + .size _init,.Lfe1-_init + .weak _fini + .set _fini,_init L_main: - .long __uClibc_main + .long __uClibc_start_main /* in libuClibc.*.so */ -L_abort: - .long abort +L_init: + .long _init +L_fini: + .long _fini +L_abort: + .long abort /* Stick in a dummy reference to main(), so that if an application * is linking when the main() function is in a static library (.a) @@ -90,5 +103,3 @@ L_abort: L_dummy_main_reference: .long main - .data - |