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authorTony Luck <tony.luck@intel.com>2010-02-08 13:42:17 -0500
committerTony Luck <tony.luck@intel.com>2010-02-08 13:42:17 -0500
commit32974ad4907cdde6c9de612cd1b2ee0568fb9409 (patch)
tree46d883f7f4fb3f4a5cee8ec9eb2c6b4939d7ae10 /arch/ia64/ia32/ia32_traps.c
parent6339204ecc2aa2067a99595522de0403f0854bb8 (diff)
[IA64] Remove COMPAT_IA32 support
This has been broken since May 2008 when Al Viro killed altroot support. Since nobody has complained, it would appear that there are no users of this code (A plausible theory since the main OSVs that support ia64 prefer to use the IA32-EL software emulation). Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/ia32/ia32_traps.c')
-rw-r--r--arch/ia64/ia32/ia32_traps.c156
1 files changed, 0 insertions, 156 deletions
diff --git a/arch/ia64/ia32/ia32_traps.c b/arch/ia64/ia32/ia32_traps.c
deleted file mode 100644
index e486042672f..00000000000
--- a/arch/ia64/ia32/ia32_traps.c
+++ /dev/null
@@ -1,156 +0,0 @@
1/*
2 * IA-32 exception handlers
3 *
4 * Copyright (C) 2000 Asit K. Mallick <asit.k.mallick@intel.com>
5 * Copyright (C) 2001-2002 Hewlett-Packard Co
6 * David Mosberger-Tang <davidm@hpl.hp.com>
7 *
8 * 06/16/00 A. Mallick added siginfo for most cases (close to IA32)
9 * 09/29/00 D. Mosberger added ia32_intercept()
10 */
11
12#include <linux/kernel.h>
13#include <linux/sched.h>
14
15#include "ia32priv.h"
16
17#include <asm/intrinsics.h>
18#include <asm/ptrace.h>
19
20int
21ia32_intercept (struct pt_regs *regs, unsigned long isr)
22{
23 switch ((isr >> 16) & 0xff) {
24 case 0: /* Instruction intercept fault */
25 case 4: /* Locked Data reference fault */
26 case 1: /* Gate intercept trap */
27 return -1;
28
29 case 2: /* System flag trap */
30 if (((isr >> 14) & 0x3) >= 2) {
31 /* MOV SS, POP SS instructions */
32 ia64_psr(regs)->id = 1;
33 return 0;
34 } else
35 return -1;
36 }
37 return -1;
38}
39
40int
41ia32_exception (struct pt_regs *regs, unsigned long isr)
42{
43 struct siginfo siginfo;
44
45 /* initialize these fields to avoid leaking kernel bits to user space: */
46 siginfo.si_errno = 0;
47 siginfo.si_flags = 0;
48 siginfo.si_isr = 0;
49 siginfo.si_imm = 0;
50 switch ((isr >> 16) & 0xff) {
51 case 1:
52 case 2:
53 siginfo.si_signo = SIGTRAP;
54 if (isr == 0)
55 siginfo.si_code = TRAP_TRACE;
56 else if (isr & 0x4)
57 siginfo.si_code = TRAP_BRANCH;
58 else
59 siginfo.si_code = TRAP_BRKPT;
60 break;
61
62 case 3:
63 siginfo.si_signo = SIGTRAP;
64 siginfo.si_code = TRAP_BRKPT;
65 break;
66
67 case 0: /* Divide fault */
68 siginfo.si_signo = SIGFPE;
69 siginfo.si_code = FPE_INTDIV;
70 break;
71
72 case 4: /* Overflow */
73 case 5: /* Bounds fault */
74 siginfo.si_signo = SIGFPE;
75 siginfo.si_code = 0;
76 break;
77
78 case 6: /* Invalid Op-code */
79 siginfo.si_signo = SIGILL;
80 siginfo.si_code = ILL_ILLOPN;
81 break;
82
83 case 7: /* FP DNA */
84 case 8: /* Double Fault */
85 case 9: /* Invalid TSS */
86 case 11: /* Segment not present */
87 case 12: /* Stack fault */
88 case 13: /* General Protection Fault */
89 siginfo.si_signo = SIGSEGV;
90 siginfo.si_code = 0;
91 break;
92
93 case 16: /* Pending FP error */
94 {
95 unsigned long fsr, fcr;
96
97 fsr = ia64_getreg(_IA64_REG_AR_FSR);
98 fcr = ia64_getreg(_IA64_REG_AR_FCR);
99
100 siginfo.si_signo = SIGFPE;
101 /*
102 * (~cwd & swd) will mask out exceptions that are not set to unmasked
103 * status. 0x3f is the exception bits in these regs, 0x200 is the
104 * C1 reg you need in case of a stack fault, 0x040 is the stack
105 * fault bit. We should only be taking one exception at a time,
106 * so if this combination doesn't produce any single exception,
107 * then we have a bad program that isn't synchronizing its FPU usage
108 * and it will suffer the consequences since we won't be able to
109 * fully reproduce the context of the exception
110 */
111 siginfo.si_isr = isr;
112 siginfo.si_flags = __ISR_VALID;
113 switch(((~fcr) & (fsr & 0x3f)) | (fsr & 0x240)) {
114 case 0x000:
115 default:
116 siginfo.si_code = 0;
117 break;
118 case 0x001: /* Invalid Op */
119 case 0x040: /* Stack Fault */
120 case 0x240: /* Stack Fault | Direction */
121 siginfo.si_code = FPE_FLTINV;
122 break;
123 case 0x002: /* Denormalize */
124 case 0x010: /* Underflow */
125 siginfo.si_code = FPE_FLTUND;
126 break;
127 case 0x004: /* Zero Divide */
128 siginfo.si_code = FPE_FLTDIV;
129 break;
130 case 0x008: /* Overflow */
131 siginfo.si_code = FPE_FLTOVF;
132 break;
133 case 0x020: /* Precision */
134 siginfo.si_code = FPE_FLTRES;
135 break;
136 }
137
138 break;
139 }
140
141 case 17: /* Alignment check */
142 siginfo.si_signo = SIGSEGV;
143 siginfo.si_code = BUS_ADRALN;
144 break;
145
146 case 19: /* SSE Numeric error */
147 siginfo.si_signo = SIGFPE;
148 siginfo.si_code = 0;
149 break;
150
151 default:
152 return -1;
153 }
154 force_sig_info(siginfo.si_signo, &siginfo, current);
155 return 0;
156}
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