8bcd174116
The UltraSPARC T1 manual recommends this because the chip could instruction prefetch into the VA hole, and this would also make decoding certain kinds of memory access traps more difficult (because the chip sign extends certain pieces of trap state). Signed-off-by: David S. Miller <davem@davemloft.net>
107 lines
3.0 KiB
C
107 lines
3.0 KiB
C
/* $Id: a.out.h,v 1.8 2002/02/09 19:49:31 davem Exp $ */
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#ifndef __SPARC64_A_OUT_H__
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#define __SPARC64_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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#ifndef __ASSEMBLY__
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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 int a_text; /* length of text, in bytes */
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unsigned int a_data; /* length of data, in bytes */
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unsigned int a_bss; /* length of bss, in bytes */
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unsigned int a_syms; /* length of symbol table, in bytes */
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unsigned int a_entry; /* where program begins */
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unsigned int a_trsize;
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unsigned int a_drsize;
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};
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#endif /* !__ASSEMBLY__ */
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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) (unsigned long)(((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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: (unsigned long)(_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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#ifndef __ASSEMBLY__
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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 int 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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int r_pad:2; /* <unused> */
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enum reloc_type r_type:5; /* type of relocation to perform */
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int 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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#define STACK_TOP (test_thread_flag(TIF_32BIT) ? \
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0xf0000000 : \
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(0x0000080000000000UL - (1UL << 32UL)))
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#endif
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#endif /* !(__ASSEMBLY__) */
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#endif /* !(__SPARC64_A_OUT_H__) */
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