Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) |
| 3 | * Licensed under the GPL |
| 4 | */ |
| 5 | |
| 6 | #ifndef __SYS_SIGCONTEXT_I386_H |
| 7 | #define __SYS_SIGCONTEXT_I386_H |
| 8 | |
Paolo 'Blaisorblade' Giarrusso | be662a1 | 2005-09-30 11:58:59 -0700 | [diff] [blame] | 9 | #include "uml-config.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <sysdep/sc.h> |
| 11 | |
| 12 | #define IP_RESTART_SYSCALL(ip) ((ip) -= 2) |
| 13 | |
| 14 | #define SC_RESTART_SYSCALL(sc) IP_RESTART_SYSCALL(SC_IP(sc)) |
| 15 | #define SC_SET_SYSCALL_RETURN(sc, result) SC_EAX(sc) = (result) |
| 16 | |
Bodo Stroesser | c578455 | 2005-05-05 16:15:31 -0700 | [diff] [blame] | 17 | #define GET_FAULTINFO_FROM_SC(fi,sc) \ |
| 18 | { \ |
| 19 | (fi).cr2 = SC_CR2(sc); \ |
| 20 | (fi).error_code = SC_ERR(sc); \ |
| 21 | (fi).trap_no = SC_TRAPNO(sc); \ |
| 22 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | /* ptrace expects that, at the start of a system call, %eax contains |
| 25 | * -ENOSYS, so this makes it so. |
| 26 | */ |
| 27 | #define SC_START_SYSCALL(sc) do SC_EAX(sc) = -ENOSYS; while(0) |
| 28 | |
| 29 | /* This is Page Fault */ |
Paolo 'Blaisorblade' Giarrusso | be662a1 | 2005-09-30 11:58:59 -0700 | [diff] [blame] | 30 | #define SEGV_IS_FIXABLE(fi) ((fi)->trap_no == 14) |
| 31 | |
| 32 | /* SKAS3 has no trap_no on i386, but get_skas_faultinfo() sets it to 0. */ |
| 33 | #ifdef UML_CONFIG_MODE_SKAS |
| 34 | #define SEGV_MAYBE_FIXABLE(fi) ((fi)->trap_no == 0 && ptrace_faultinfo) |
| 35 | #else |
| 36 | #define SEGV_MAYBE_FIXABLE(fi) 0 |
| 37 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | extern unsigned long *sc_sigmask(void *sc_ptr); |
| 40 | extern int sc_get_fpregs(unsigned long buf, void *sc_ptr); |
| 41 | |
| 42 | #endif |
| 43 | /* |
| 44 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 45 | * Emacs will notice this stuff at the end of the file and automatically |
| 46 | * adjust the settings for this buffer only. This must remain at the end |
| 47 | * of the file. |
| 48 | * --------------------------------------------------------------------------- |
| 49 | * Local variables: |
| 50 | * c-file-style: "linux" |
| 51 | * End: |
| 52 | */ |