Include/asm-i386/elf.h
10615 #ifndef __ASMi386_ELF_H 10616 #define __ASMi386_ELF_H 10617 10618 /* ELF register definitions.. */ 10619 10620 #include <asm/ptrace.h> 10621 #include <asm/user.h> 10622 10623 typedef unsigned long elf_greg_t; 10624 10625 #define ELF_NGREG \ 10626 (sizeof (struct user_regs_struct) / sizeof(elf_greg_t)) 10627 typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 10628 10629 typedef struct user_i387_struct elf_fpregset_t; 10630 10631 /* This is used to ensure we don't load something for the 10632 * wrong architecture. */ 10633 #define elf_check_arch(x) \ 10634 ( ((x) == EM_386) ((x) == EM_486) ) 10635 10636 /* These are used to set parameters in the core dumps. */ 10637 #define ELF_CLASS ELFCLASS32 10638 #define ELF_DATA ELFDATA2LSB 10639 #define ELF_ARCH EM_386 10640 10641 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the 10642 program starts %edx contains a pointer to a function 10643 which might be registered using `atexit'. This 10644 provides a mean for the dynamic linker to call DT_FINI 10645 functions for shared libraries that have been loaded 10646 before the code runs. 10647 10648 A value of 0 tells we have no such handler. 10649 10650 We might as well make sure everything else is cleared 10651 too (except for %esp), just to make things more 10652 deterministic. */ 10653 #define ELF_PLAT_INIT(_r) do { \ 10654 _r->ebx = 0; _r->ecx = 0; _r->edx = 0; \ 10655 _r->esi = 0; _r->edi = 0; _r->ebp = 0; \ 10656 _r->eax = 0; \ 10657 } while (0) 10658 10659 #define USE_ELF_CORE_DUMP 10660 #define ELF_EXEC_PAGESIZE 4096 10661 10662 /* This is the location that an ET_DYN program is loaded 10663 if exec'ed. Typical use of this is to invoke "./ld.so 10664 someprog" to test out a new version of the loader. We 10665 need to make sure that it is out of the way of the 10666 program that it will "exec", and that there is 10667 sufficient room for the brk. */ 10668 10669 #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3) 10670 10671 /* Wow, the "main" arch needs arch dependent functions 10672 * too.. :) */ 10673 10674 /* regs is struct pt_regs, pr_reg is elf_gregset_t (which 10675 * is now struct_user_regs, they are different) */ 10676 10677 #define ELF_CORE_COPY_REGS(pr_reg, regs) \ 10678 pr_reg[0] = regs->ebx; \ 10679 pr_reg[1] = regs->ecx; \ 10680 pr_reg[2] = regs->edx; \ 10681 pr_reg[3] = regs->esi; \ 10682 pr_reg[4] = regs->edi; \ 10683 pr_reg[5] = regs->ebp; \ 10684 pr_reg[6] = regs->eax; \ 10685 pr_reg[7] = regs->xds; \ 10686 pr_reg[8] = regs->xes; \ 10687 /* fake once used fs and gs selectors? */ \ 10688 pr_reg[9] = regs->xds; /* was fs and __fs */ \ 10689 pr_reg[10] = regs->xds; /* was gs and __gs */ \ 10690 pr_reg[11] = regs->orig_eax; \ 10691 pr_reg[12] = regs->eip; \ 10692 pr_reg[13] = regs->xcs; \ 10693 pr_reg[14] = regs->eflags; \ 10694 pr_reg[15] = regs->esp; \ 10695 pr_reg[16] = regs->xss; 10696 10697 /* This yields a mask that user programs can use to 10698 figure out what instruction set this CPU supports. 10699 This could be done in user space, but it's not easy, 10700 and we've already done it here. */ 10701 10702 #define ELF_HWCAP (boot_cpu_data.x86_capability) 10703 10704 /* This yields a string that ld.so will use to load 10705 implementation specific libraries for optimization. 10706 This is more specific in intent than poking at uname 10707 or /proc/cpuinfo. 10708 10709 For the moment, we have only optimizations for the 10710 Intel generations, but that could change... */ 10711 10712 #define ELF_PLATFORM \ 10713 ("i386\0i486\0i586\0i686"+((boot_cpu_data.x86-3)*5)) 10714 10715 #ifdef __KERNEL__ 10716 #define SET_PERSONALITY(ex, ibcs2) \ 10717 current->personality = (ibcs2 ? PER_SVR4 : PER_LINUX) 10718 #endif 10719 10720 #endif
