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>
108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
#ifndef __ALPHA_A_OUT_H__
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#define __ALPHA_A_OUT_H__
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#include <linux/types.h>
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/*
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* OSF/1 ECOFF header structs. ECOFF files consist of:
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* - a file header (struct filehdr),
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* - an a.out header (struct aouthdr),
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* - one or more section headers (struct scnhdr).
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* The filhdr's "f_nscns" field contains the
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* number of section headers.
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*/
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struct filehdr
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{
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/* OSF/1 "file" header */
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__u16 f_magic, f_nscns;
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__u32 f_timdat;
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__u64 f_symptr;
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__u32 f_nsyms;
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__u16 f_opthdr, f_flags;
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};
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struct aouthdr
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{
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__u64 info; /* after that it looks quite normal.. */
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__u64 tsize;
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__u64 dsize;
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__u64 bsize;
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__u64 entry;
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__u64 text_start; /* with a few additions that actually make sense */
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__u64 data_start;
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__u64 bss_start;
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__u32 gprmask, fprmask; /* bitmask of general & floating point regs used in binary */
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__u64 gpvalue;
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};
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struct scnhdr
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{
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char s_name[8];
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__u64 s_paddr;
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__u64 s_vaddr;
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__u64 s_size;
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__u64 s_scnptr;
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__u64 s_relptr;
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__u64 s_lnnoptr;
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__u16 s_nreloc;
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__u16 s_nlnno;
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__u32 s_flags;
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};
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struct exec
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{
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/* OSF/1 "file" header */
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struct filehdr fh;
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struct aouthdr ah;
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};
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/*
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* Define's so that the kernel exec code can access the a.out header
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* fields...
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*/
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#define a_info ah.info
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#define a_text ah.tsize
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#define a_data ah.dsize
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#define a_bss ah.bsize
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#define a_entry ah.entry
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#define a_textstart ah.text_start
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#define a_datastart ah.data_start
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#define a_bssstart ah.bss_start
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#define a_gprmask ah.gprmask
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#define a_fprmask ah.fprmask
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#define a_gpvalue ah.gpvalue
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#define N_TXTADDR(x) ((x).a_textstart)
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#define N_DATADDR(x) ((x).a_datastart)
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#define N_BSSADDR(x) ((x).a_bssstart)
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#define N_DRSIZE(x) 0
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#define N_TRSIZE(x) 0
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#define N_SYMSIZE(x) 0
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#define AOUTHSZ sizeof(struct aouthdr)
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#define SCNHSZ sizeof(struct scnhdr)
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#define SCNROUND 16
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#define N_TXTOFF(x) \
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((long) N_MAGIC(x) == ZMAGIC ? 0 : \
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(sizeof(struct exec) + (x).fh.f_nscns*SCNHSZ + SCNROUND - 1) & ~(SCNROUND - 1))
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#ifdef __KERNEL__
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/* Assume that start addresses below 4G belong to a TASO application.
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Unfortunately, there is no proper bit in the exec header to check.
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Worse, we have to notice the start address before swapping to use
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/sbin/loader, which of course is _not_ a TASO application. */
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#define SET_AOUT_PERSONALITY(BFPM, EX) \
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set_personality (((BFPM->sh_bang || EX.ah.entry < 0x100000000L \
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? ADDR_LIMIT_32BIT : 0) | PER_OSF4))
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#define STACK_TOP \
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(current->personality & ADDR_LIMIT_32BIT ? 0x80000000 : 0x00120000000UL)
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#define STACK_TOP_MAX 0x00120000000UL
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#endif
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#endif /* __A_OUT_GNU_H__ */
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