L4Re - L4 Runtime Environment
utcb.h
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1 /*****************************************************************************/
7 /*
8  * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
9  * Alexander Warg <warg@os.inf.tu-dresden.de>
10  * economic rights: Technische Universit├Ąt Dresden (Germany)
11  *
12  * This file is part of TUD:OS and distributed under the terms of the
13  * GNU General Public License 2.
14  * Please see the COPYING-GPL-2 file for details.
15  *
16  * As a special exception, you may use this file as part of a free software
17  * library without restriction. Specifically, if other files instantiate
18  * templates or use macros or inline functions from this file, or you compile
19  * this file and link it with other files to produce an executable, this
20  * file does not by itself cause the resulting executable to be covered by
21  * the GNU General Public License. This exception does not however
22  * invalidate any other reasons why the executable file might be covered by
23  * the GNU General Public License.
24  */
25 /*****************************************************************************/
26 #ifndef __L4_SYS__INCLUDE__ARCH_X86__UTCB_H__
27 #define __L4_SYS__INCLUDE__ARCH_X86__UTCB_H__
28 
29 #include <l4/sys/types.h>
30 
42 {
45 
48 
51 
54 
57 
60 
62  L4_UTCB_INHERIT_FPU = 1UL << 24,
63 
66 };
67 
72 typedef struct l4_exc_regs_t
73 {
91  l4_umword_t ip;
94  l4_umword_t sp;
95  l4_umword_t ss;
97 
98 #include_next <l4/sys/utcb.h>
99 
100 /*
101  * ==================================================================
102  * Implementations.
103  */
104 
105 L4_INLINE l4_utcb_t *l4_utcb_direct(void) L4_NOTHROW
106 {
107  l4_utcb_t *utcb;
108  __asm__ ("mov %%fs:0, %0" : "=r" (utcb));
109  return utcb;
110 }
111 
113 {
114  return u->ip;
115 }
116 
118 {
119  u->ip = pc;
120 }
121 
122 L4_INLINE void l4_utcb_exc_sp_set(l4_exc_regs_t *u, l4_addr_t sp) L4_NOTHROW
123 {
124  u->sp = sp;
125 }
126 
128 {
129  return u->trapno;
130 }
131 
133 {
134  return u->trapno == 14;
135 }
136 
138 {
139  return (u->pfa & ~7UL) | (u->err & 2);
140 }
141 
143 {
144  return l4_utcb_exc_typeval(u) == 0xff;
145 }
146 
147 #endif /* ! __L4_SYS__INCLUDE__ARCH_X86__UTCB_H__ */
Total number of message register (MRs) available.
Definition: utcb.h:47
l4_umword_t sp
stack pointer
Definition: utcb.h:44
l4_umword_t dummy1
dummy
Definition: utcb.h:79
int l4_utcb_exc_is_pf(l4_exc_regs_t const *u) L4_NOTHROW L4_PURE
Check whether an exception IPC is a page fault.
Definition: utcb.h:105
l4_umword_t trapno
trap number
Definition: utcb.h:76
l4_umword_t flags
rflags
Definition: utcb.h:80
int l4_utcb_exc_is_ex_regs_exception(l4_exc_regs_t const *u) L4_NOTHROW L4_PURE
Check whether an exception IPC was triggered via l4_thread_ex_regs().
Definition: utcb.h:115
Common L4 ABI Data Types.
l4_umword_t err
error code
Definition: utcb.h:41
l4_umword_t edi
edi register
Definition: utcb.h:79
l4_umword_t ip
instruction pointer
Definition: utcb.h:78
l4_umword_t edx
edx register
Definition: utcb.h:84
struct l4_utcb_t l4_utcb_t
Opaque type for the UTCB.
Definition: utcb.h:67
BDR flag to accept reception of FPU state.
Definition: utcb.h:62
unsigned long l4_utcb_exc_typeval(l4_exc_regs_t const *u) L4_NOTHROW L4_PURE
Get the value out of an exception UTCB that describes the type of exception.
Definition: utcb.h:100
Number if message registers used for exception IPC.
Definition: utcb.h:44
Offset of MR[0] relative to the UTCB pointer.
Definition: utcb.h:53
Total number of buffer registers (BRs) available.
Definition: utcb.h:50
l4_umword_t pc
pc
Definition: utcb.h:47
struct l4_exc_regs_t l4_exc_regs_t
UTCB structure for exceptions.
unsigned long l4_umword_t
Unsigned machine word.
Definition: l4int.h:52
l4_addr_t l4_utcb_exc_pfa(l4_exc_regs_t const *u) L4_NOTHROW L4_PURE
Function to get the L4 style page fault address out of an exception.
Definition: utcb.h:110
void l4_utcb_exc_pc_set(l4_exc_regs_t *u, l4_addr_t pc) L4_NOTHROW
Set the program counter register in the exception state.
Definition: utcb.h:95
Offset of BR[0] relative to the UTCB pointer.
Definition: utcb.h:56
l4_umword_t ds
ds register
Definition: utcb.h:75
Offset of TCR[0] relative to the UTCB pointer.
Definition: utcb.h:59
l4_umword_t ecx
ecx register
Definition: utcb.h:85
l4_umword_t gs
gs register
Definition: utcb.h:76
l4_umword_t pfa
page fault address
Definition: utcb.h:40
l4_umword_t es
es register
Definition: utcb.h:74
l4_umword_t ss
stack segment register
Definition: utcb.h:82
L4_utcb_consts_x86
UTCB constants for x86.
Definition: utcb.h:41
Offset of two consecutive UTCBs.
Definition: utcb.h:65
l4_umword_t eax
eax register
Definition: utcb.h:86
UTCB structure for exceptions.
Definition: utcb.h:38
l4_umword_t ebx
ebx register
Definition: utcb.h:83
l4_umword_t ebp
ebp register
Definition: utcb.h:81
unsigned long l4_addr_t
Address type.
Definition: l4int.h:45
l4_umword_t esi
esi register
Definition: utcb.h:80
l4_umword_t fs
fs register
Definition: utcb.h:77
l4_umword_t l4_utcb_exc_pc(l4_exc_regs_t const *u) L4_NOTHROW L4_PURE
Access function to get the program counter of the exception state.
Definition: utcb.h:90
#define L4_NOTHROW
Mark a function declaration and definition as never throwing an exception.
Definition: compiler.h:185