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7facdc426f
To get rid of hardcoded size/offset in those macros we need to have a definition of i386 variant of struct elf_prstatus. However, we can't do that in asm/compat.h - the types needed for that are not there and adding an include of asm/user32.h into asm/compat.h would cause a lot of mess. That could be conveniently done in elfcore-compat.h, but currently there is nowhere to put arch-dependent parts of it - no asm/elfcore-compat.h. So we introduce a new file (asm/elfcore-compat.h, present on architectures that have CONFIG_ARCH_HAS_ELFCORE_COMPAT set, currently only on x86), have it pulled by linux/elfcore-compat.h and move the definitions there. As a side benefit, we don't need to worry about accidental inclusion of that file into binfmt_elf.c itself, so we don't need the dance with COMPAT_PRSTATUS_SIZE, etc. - only fs/compat_binfmt_elf.c will see that header. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
32 lines
890 B
C
32 lines
890 B
C
#ifndef _ASM_X86_ELFCORE_COMPAT_H
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#define _ASM_X86_ELFCORE_COMPAT_H
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#include <asm/user32.h>
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/*
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* On amd64 we have two 32bit ABIs - i386 and x32. The latter
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* has bigger registers, so we use it for compat_elf_regset_t.
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* The former uses i386_elf_prstatus and PRSTATUS_SIZE/SET_PR_FPVALID
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* are used to choose the size and location of ->pr_fpvalid of
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* the layout actually used.
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*/
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typedef struct user_regs_struct compat_elf_gregset_t;
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struct i386_elf_prstatus
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{
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struct compat_elf_prstatus_common common;
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struct user_regs_struct32 pr_reg;
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compat_int_t pr_fpvalid;
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};
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#define PRSTATUS_SIZE \
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(user_64bit_mode(task_pt_regs(current)) \
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? sizeof(struct compat_elf_prstatus) \
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: sizeof(struct i386_elf_prstatus))
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#define SET_PR_FPVALID(S) \
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(*(user_64bit_mode(task_pt_regs(current)) \
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? &(S)->pr_fpvalid \
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: &((struct i386_elf_prstatus *)(S))->pr_fpvalid) = 1)
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#endif
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