b111757c50
New arch macro STACK_TOP_MAX it gives the larges valid stack address for the architecture in question. It differs from STACK_TOP in that it will not distinguish between personalities but will always return the largest possible address. This is used to create the initial stack on execve, which we will move down to the proper location once the binfmt code has figured out where that is. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ollie Wild <aaw@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
/* $Id: a.out.h,v 1.13 2000/01/09 10:46:53 anton Exp $ */
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#ifndef __SPARC_A_OUT_H__
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#define __SPARC_A_OUT_H__
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#define SPARC_PGSIZE 0x2000 /* Thanks to the sun4 architecture... */
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#define SEGMENT_SIZE SPARC_PGSIZE /* whee... */
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struct exec {
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unsigned char a_dynamic:1; /* A __DYNAMIC is in this image */
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unsigned char a_toolversion:7;
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unsigned char a_machtype;
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unsigned short a_info;
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unsigned long a_text; /* length of text, in bytes */
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unsigned long a_data; /* length of data, in bytes */
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unsigned long a_bss; /* length of bss, in bytes */
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unsigned long a_syms; /* length of symbol table, in bytes */
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unsigned long a_entry; /* where program begins */
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unsigned long a_trsize;
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unsigned long a_drsize;
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};
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/* Where in the file does the text information begin? */
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#define N_TXTOFF(x) (N_MAGIC(x) == ZMAGIC ? 0 : sizeof (struct exec))
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/* Where do the Symbols start? */
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#define N_SYMOFF(x) (N_TXTOFF(x) + (x).a_text + \
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(x).a_data + (x).a_trsize + \
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(x).a_drsize)
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/* Where does text segment go in memory after being loaded? */
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#define N_TXTADDR(x) (((N_MAGIC(x) == ZMAGIC) && \
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((x).a_entry < SPARC_PGSIZE)) ? \
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0 : SPARC_PGSIZE)
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/* And same for the data segment.. */
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#define N_DATADDR(x) (N_MAGIC(x)==OMAGIC ? \
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(N_TXTADDR(x) + (x).a_text) \
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: (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
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#define N_TRSIZE(a) ((a).a_trsize)
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#define N_DRSIZE(a) ((a).a_drsize)
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#define N_SYMSIZE(a) ((a).a_syms)
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/*
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* Sparc relocation types
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*/
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enum reloc_type
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{
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RELOC_8,
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RELOC_16,
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RELOC_32, /* simplest relocs */
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RELOC_DISP8,
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RELOC_DISP16,
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RELOC_DISP32, /* Disp's (pc-rel) */
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RELOC_WDISP30,
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RELOC_WDISP22, /* SR word disp's */
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RELOC_HI22,
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RELOC_22, /* SR 22-bit relocs */
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RELOC_13,
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RELOC_LO10, /* SR 13&10-bit relocs */
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RELOC_SFA_BASE,
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RELOC_SFA_OFF13, /* SR S.F.A. relocs */
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RELOC_BASE10,
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RELOC_BASE13,
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RELOC_BASE22, /* base_relative pic */
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RELOC_PC10,
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RELOC_PC22, /* special pc-rel pic */
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RELOC_JMP_TBL, /* jmp_tbl_rel in pic */
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RELOC_SEGOFF16, /* ShLib offset-in-seg */
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RELOC_GLOB_DAT,
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RELOC_JMP_SLOT,
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RELOC_RELATIVE /* rtld relocs */
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};
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/*
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* Format of a relocation datum.
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*/
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struct relocation_info /* used when header.a_machtype == M_SPARC */
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{
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unsigned long r_address; /* relocation addr */
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unsigned int r_index:24; /* segment index or symbol index */
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unsigned int r_extern:1; /* if F, r_index==SEG#; if T, SYM idx */
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unsigned int r_pad:2; /* <unused> */
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enum reloc_type r_type:5; /* type of relocation to perform */
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long r_addend; /* addend for relocation value */
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};
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#define N_RELOCATION_INFO_DECLARED 1
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#ifdef __KERNEL__
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#include <asm/page.h>
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#define STACK_TOP (PAGE_OFFSET - PAGE_SIZE)
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#define STACK_TOP_MAX STACK_TOP
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#endif /* __KERNEL__ */
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#endif /* __SPARC_A_OUT_H__ */
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