| /* Machine-dependent ELF dynamic relocation inline functions. x32 version. |
| Copyright (C) 2012-2014 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 |
| 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. |
| |
| 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* Must allow <sysdeps/x86_64/dl-machine.h> to be included more than once. |
| See #ifdef RESOLVE_MAP in sysdeps/x86_64/dl-machine.h. */ |
| #include <sysdeps/x86_64/dl-machine.h> |
| |
| #ifndef _X32_DL_MACHINE_H |
| #define _X32_DL_MACHINE_H |
| |
| #undef ARCH_LA_PLTENTER |
| #undef ARCH_LA_PLTEXIT |
| #undef RTLD_START |
| |
| /* Names of the architecture-specific auditing callback functions. */ |
| #define ARCH_LA_PLTENTER x32_gnu_pltenter |
| #define ARCH_LA_PLTEXIT x32_gnu_pltexit |
| |
| /* Initial entry point code for the dynamic linker. |
| The C function `_dl_start' is the real entry point; |
| its return value is the user program's entry point. */ |
| #define RTLD_START asm ("\n\ |
| .text\n\ |
| .p2align 4\n\ |
| .globl _start\n\ |
| .globl _dl_start_user\n\ |
| _start:\n\ |
| movl %esp, %edi\n\ |
| call _dl_start\n\ |
| _dl_start_user:\n\ |
| # Save the user entry point address in %r12.\n\ |
| movl %eax, %r12d\n\ |
| # See if we were run as a command with the executable file\n\ |
| # name as an extra leading argument.\n\ |
| movl _dl_skip_args(%rip), %eax\n\ |
| # Pop the original argument count.\n\ |
| movl (%rsp), %edx\n\ |
| # Adjust the stack pointer to skip _dl_skip_args words.\n\ |
| lea 4(%rsp,%rax,4), %esp\n\ |
| # Subtract _dl_skip_args from argc.\n\ |
| subl %eax, %edx\n\ |
| # Push argc back on the stack.\n\ |
| subl $4, %esp\n\ |
| movl %edx, (%rsp)\n\ |
| # Call _dl_init (struct link_map *main_map, int argc, char **argv, char **env)\n\ |
| # argc -> rsi\n\ |
| movl %edx, %esi\n\ |
| # Save %rsp value in %r13.\n\ |
| movl %esp, %r13d\n\ |
| # And align stack for the _dl_init_internal call.\n\ |
| and $-16, %esp\n\ |
| # _dl_loaded -> rdi\n\ |
| movl _rtld_local(%rip), %edi\n\ |
| # env -> rcx\n\ |
| lea 8(%r13,%rdx,4), %ecx\n\ |
| # argv -> rdx\n\ |
| lea 4(%r13), %edx\n\ |
| # Clear %rbp to mark outermost frame obviously even for constructors.\n\ |
| xorl %ebp, %ebp\n\ |
| # Call the function to run the initializers.\n\ |
| call _dl_init_internal\n\ |
| # Pass our finalizer function to the user in %rdx, as per ELF ABI.\n\ |
| lea _dl_fini(%rip), %edx\n\ |
| # And make sure %rsp points to argc stored on the stack.\n\ |
| movl %r13d, %esp\n\ |
| # Jump to the user's entry point.\n\ |
| jmp *%r12\n\ |
| .previous\n\ |
| "); |
| |
| #endif /* !_X32_DL_MACHINE_H */ |