be662a18b7
I hadn't been running a SKAS3 host when testing the "uml: fix hang in TT mode
on fault" patch (commit 546fe1cbf9), and I
didn't think enough to the missing trap_no in SKAS3 mode.
In fact, the resulting kernel doesn't work at all in SKAS3 mode.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/*
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* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#ifndef __SYS_SIGCONTEXT_I386_H
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#define __SYS_SIGCONTEXT_I386_H
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#include "uml-config.h"
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#include <sysdep/sc.h>
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#define IP_RESTART_SYSCALL(ip) ((ip) -= 2)
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#define SC_RESTART_SYSCALL(sc) IP_RESTART_SYSCALL(SC_IP(sc))
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#define SC_SET_SYSCALL_RETURN(sc, result) SC_EAX(sc) = (result)
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#define GET_FAULTINFO_FROM_SC(fi,sc) \
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{ \
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(fi).cr2 = SC_CR2(sc); \
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(fi).error_code = SC_ERR(sc); \
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(fi).trap_no = SC_TRAPNO(sc); \
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}
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/* ptrace expects that, at the start of a system call, %eax contains
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* -ENOSYS, so this makes it so.
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*/
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#define SC_START_SYSCALL(sc) do SC_EAX(sc) = -ENOSYS; while(0)
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/* This is Page Fault */
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#define SEGV_IS_FIXABLE(fi) ((fi)->trap_no == 14)
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/* SKAS3 has no trap_no on i386, but get_skas_faultinfo() sets it to 0. */
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#ifdef UML_CONFIG_MODE_SKAS
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#define SEGV_MAYBE_FIXABLE(fi) ((fi)->trap_no == 0 && ptrace_faultinfo)
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#else
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#define SEGV_MAYBE_FIXABLE(fi) 0
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#endif
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extern unsigned long *sc_sigmask(void *sc_ptr);
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extern int sc_get_fpregs(unsigned long buf, void *sc_ptr);
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#endif
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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