[uClibc-cvs] svn commit: trunk/uClibc/libc/sysdeps/linux/x86_64
vapier at uclibc.org
vapier at uclibc.org
Wed Jun 29 00:54:39 UTC 2005
Author: vapier
Date: 2005-06-28 18:54:38 -0600 (Tue, 28 Jun 2005)
New Revision: 10617
Log:
rename crt0.S to crt1.S and clean up so it actually works :)
Added:
trunk/uClibc/libc/sysdeps/linux/x86_64/crt1.S
Removed:
trunk/uClibc/libc/sysdeps/linux/x86_64/crt0.S
Changeset:
Deleted: trunk/uClibc/libc/sysdeps/linux/x86_64/crt0.S
===================================================================
--- trunk/uClibc/libc/sysdeps/linux/x86_64/crt0.S 2005-06-29 00:43:31 UTC (rev 10616)
+++ trunk/uClibc/libc/sysdeps/linux/x86_64/crt0.S 2005-06-29 00:54:38 UTC (rev 10617)
@@ -1,182 +0,0 @@
-/* Startup code compliant to the ELF x86-64 ABI.
- Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Andreas Jaeger <aj at suse.de>, 2001.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- In addition to the permissions in the GNU Lesser General Public
- License, the Free Software Foundation gives you unlimited
- permission to link the compiled version of this file with other
- programs, and to distribute those programs without any restriction
- coming from the use of this file. (The GNU Lesser General Public
- License restrictions do apply in other respects; for example, they
- cover modification of the file, and distribution when not linked
- into another program.)
-
- Note that people who make modified versions of this file are not
- obligated to grant this special exception for their modified
- versions; it is their choice whether to do so. The GNU Lesser
- General Public License gives permission to release a modified
- version without this exception; this exception also makes it
- possible to release a modified version which carries forward this
- exception.
-
- 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-/* Originally based on glibc's sysdeps/x86_64/elf/start.S */
-
-/* This is the canonical entry point, usually the first thing in the text
- segment. The SVR4/i386 ABI (pages 3-31, 3-32) says that when the entry
- point runs, most registers' values are unspecified, except for:
-
- %rdx 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.
-
- %rsp The stack contains the arguments and environment:
- 0(%rsp) argc
- 8(%rsp) argv[0]
- ...
- (8*argc)(%rsp) NULL
- (8*(argc+1))(%rsp) envp[0]
- ...
- NULL
-*/
-
-#include <features.h>
-
-.text
- .global _start
- .type _start,%function
-#if defined L_crt0 || defined L_Scrt0 || ! defined __UCLIBC_CTOR_DTOR__
- .type __uClibc_main,%function
-#else
- .weak _init
- .weak _fini
- .type __uClibc_start_main,%function
-#endif
-/* Stick in a dummy reference to main(), so that if an application
- * is linking when the main() function is in a static library (.a)
- * we can be sure that main() actually gets linked in */
- .type main,%function
-
-_start:
- /* Clear the frame pointer. The ABI suggests this be done, to mark
- the outermost frame obviously. */
- xorq %rbp, %rbp
-
- /* Extract the arguments as encoded on the stack and set up
- the arguments for __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).
- The arguments are passed via registers and on the stack:
- main: %rdi
- argc: %rsi
- argv: %rdx
- init: %rcx
- fini: %r8
- rtld_fini: %r9
- stack_end: stack. */
-
-#if 0
- /* glibc */
- movq %rdx, %r9 /* Address of the shared library termination function. */
- popq %rsi /* Pop the argument count. */
- movq %rsp, %rdx /* argv starts just at the current stack top. */
- movq %rsi, %rbx /* now we calc envp ... envp = argc */
- addq $8, %rbx
- shl $0x3, %rbx /* envp *= 8 */
- addq %rdx, %rbx /* envp += argv */
-#else
- /* uclibc */
- movq %rdx, %r9 /* Address of the shared library termination function. */
- popq %rdi /* Pop the argument count. */
- movq %rsp, %rsi /* argv starts just at the current stack top. */
- movq %rdi, %rdx /* now we calc envp ... envp = argc */
- addq $8, %rdx
- shl $0x3, %rdx /* envp *= 8 */
- addq %rsi, %rdx /* envp += argv */
-#endif
- /* Align the stack to a 16 byte boundary to follow the ABI. */
- andq $~15, %rsp
-
- pushq %rax /* Push garbage because we push 8 more bytes. */
-
- /* Provide the highest stack address to the user code (for stacks
- which grow downwards). */
- pushq %rsp
-
-/**************
- * START TODO */
-#if defined L_Scrt0 || defined L_Scrt1
- call .L0
-.L0:
- popq %rbx
- addq $_GLOBAL_OFFSET_TABLE_+[.-.L0],%rbx
-#endif
-
-#if (defined L_crt1 || defined L_Scrt1) && defined __UCLIBC_CTOR_DTOR__
- /* Push .init and .fini arguments to __uClibc_start_main() on the stack */
-#ifdef L_Scrt1
- pushl _fini at GOT(%rip)
- pushl _init at GOT(%rip)
-#else
- pushl $_fini
- pushl $_init
-#endif
-
- /* Push envp, argc, and argc arguments to __uClibc_start_main() on the stack */
-#if 0
- pushq %rdx /* Environment pointer */
- pushq %rsi /* Argument pointer */
- pushq %rdi /* And the argument count */
-#endif
-
- /* Ok, now run uClibc's main() -- shouldn't return */
-#ifdef L_Scrt1
- call *__uClibc_start_main at GOT(%rip)
-#else
- call __uClibc_start_main
-#endif
-#else
-
- /* Push envp, argc, and argc arguments to __uClibc_start_main() on the stack */
-#if 0
- pushq %rdx /* Environment pointer */
- pushq %rsi /* Argument pointer */
- pushq %rdi /* And the argument count */
-#endif
-
-#ifdef L_Scrt0
- call *__uClibc_main at GOT(%rip)
-#else
- call __uClibc_main
-#endif
-#endif
-/* END TODO *
- ************/
-
- hlt /* Crash if somehow `exit' does return. */
-.size _start,.-_start
-
-/* Define a symbol for the first piece of initialized data. */
- .data
- .globl __data_start
-__data_start:
- .long 0
- .weak data_start
- data_start = __data_start
Added: trunk/uClibc/libc/sysdeps/linux/x86_64/crt1.S
===================================================================
--- trunk/uClibc/libc/sysdeps/linux/x86_64/crt1.S 2005-06-29 00:43:31 UTC (rev 10616)
+++ trunk/uClibc/libc/sysdeps/linux/x86_64/crt1.S 2005-06-29 00:54:38 UTC (rev 10617)
@@ -0,0 +1,144 @@
+/* Startup code compliant to the ELF x86-64 ABI.
+ Copyright (C) 2001, 2002, 2003, 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Andreas Jaeger <aj at suse.de>, 2001.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ In addition to the permissions in the GNU Lesser General Public
+ License, the Free Software Foundation gives you unlimited
+ permission to link the compiled version of this file with other
+ programs, and to distribute those programs without any restriction
+ coming from the use of this file. (The GNU Lesser General Public
+ License restrictions do apply in other respects; for example, they
+ cover modification of the file, and distribution when not linked
+ into another program.)
+
+ Note that people who make modified versions of this file are not
+ obligated to grant this special exception for their modified
+ versions; it is their choice whether to do so. The GNU Lesser
+ General Public License gives permission to release a modified
+ version without this exception; this exception also makes it
+ possible to release a modified version which carries forward this
+ exception.
+
+ 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* Originally based on glibc's sysdeps/x86_64/elf/start.S */
+
+/* This is the canonical entry point, usually the first thing in the text
+ segment. The SVR4/i386 ABI (pages 3-31, 3-32) says that when the entry
+ point runs, most registers' values are unspecified, except for:
+
+ %rdx 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.
+
+ %rsp The stack contains the arguments and environment:
+ 0(%rsp) argc
+ 8(%rsp) argv[0]
+ ...
+ (8*argc)(%rsp) NULL
+ (8*(argc+1))(%rsp) envp[0]
+ ...
+ NULL
+*/
+
+#include <features.h>
+
+.text
+.global _start
+.type _start, at function
+#if defined(__UCLIBC_CTOR_DTOR__)
+.type _init, at function
+.type _fini, at function
+#else
+.weak _init
+.weak _fini
+#endif
+.type __uClibc_main, at function
+/* Stick in a dummy reference to main(), so that if an application
+ * is linking when the main() function is in a static library (.a)
+ * we can be sure that main() actually gets linked in */
+.type main, at function
+
+_start:
+ /* Clear the frame pointer. The ABI suggests this be done, to mark
+ the outermost frame obviously. */
+ xorl %ebp, %ebp
+
+ /* Extract the arguments as encoded on the stack and set up
+ the arguments for __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).
+ The arguments are passed via registers and on the stack:
+ main: %rdi
+ argc: %rsi
+ argv: %rdx
+ init: %rcx
+ fini: %r8
+ rtld_fini: %r9
+ stack_end: stack. */
+
+ movq %rdx, %r9 /* Address of the shared library termination function. */
+ popq %rsi /* Pop the argument count. */
+ movq %rsp, %rdx /* argv starts just at the current stack top. */
+ movq %rsi, %rbx /* now we calc envp ... envp = argc */
+ addq $8, %rbx
+ shl $0x3, %rbx /* envp *= 8 */
+ addq %rdx, %rbx /* envp += argv */
+
+ /* Align the stack to a 16 byte boundary to follow the ABI. */
+ andq $~15, %rsp
+
+ pushq %rax /* Push garbage because we push 8 more bytes. */
+
+ /* Provide the highest stack address to the user code (for stacks
+ which grow downwards). */
+ pushq %rsp
+
+ /* Give address for main() */
+ movq $main, %rdi
+
+ /* setup init/fini address */
+ movq $_init, %rcx
+ movq $_fini, %r8
+
+/**************
+ * START TODO */
+#if defined(L_Scrt1)
+ call .L0
+.L0:
+ popq %rbx
+ addq $_GLOBAL_OFFSET_TABLE_+[.-.L0],%rbx
+
+ call *__uClibc_main at GOT(%rip)
+#else
+ call __uClibc_main
+#endif
+/* END TODO *
+ ************/
+
+ hlt /* Crash if somehow `exit' does return. */
+.size _start,.-_start
+
+/* Define a symbol for the first piece of initialized data. */
+.data
+.globl __data_start
+__data_start:
+.long 0
+.weak data_start
+ data_start = __data_start
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