/usr/share/systemtap/runtime/loc2c-runtime.h is in systemtap-common 2.6-0.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 | /* target operations
* Copyright (C) 2005-2012 Red Hat Inc.
* Copyright (C) 2005-2007 Intel Corporation.
* Copyright (C) 2007 Quentin Barnes.
*
* This file is part of systemtap, and is free software. You can
* redistribute it and/or modify it under the terms of the GNU General
* Public License (GPL); either version 2, or (at your option) any
* later version.
*/
#ifndef _LOC2C_RUNTIME_H_
#define _LOC2C_RUNTIME_H_
/* See also the linux/ and dyninst/ runtime specializations. */
/* These three macro definitions are generic, just shorthands
used by the generated code. */
#define op_abs(x) (x < 0 ? -x : x)
#define fetch_bitfield(target, base, higherbits, nbits) \
target = (((base) >> (sizeof (base) * 8 - (higherbits) - (nbits))) \
& (((__typeof (base)) 1 << (nbits)) - 1))
#define store_bitfield(target, base, higherbits, nbits) \
target = ((target \
&~ ((((__typeof (target)) 1 << (nbits)) - 1) \
<< (sizeof (target) * 8 - (higherbits) - (nbits)))) \
| ((((__typeof (target)) (base)) \
& (((__typeof (target)) 1 << (nbits)) - 1)) \
<< (sizeof (target) * 8 - (higherbits) - (nbits))))
/* dwarf_div_op and dwarf_mod_op do division and modulo operations catching any
divide by zero issues. When they detect div_by_zero they "fault"
by jumping to the (slightly misnamed) deref_fault label. */
#define dwarf_div_op(a,b) ({ \
if (b == 0) { \
snprintf(c->error_buffer, sizeof(c->error_buffer), \
STAP_MSG_LOC2C_03, "DW_OP_div"); \
c->last_error = c->error_buffer; \
goto deref_fault; \
} \
a / b; \
})
#define dwarf_mod_op(a,b) ({ \
if (b == 0) { \
snprintf(c->error_buffer, sizeof(c->error_buffer), \
STAP_MSG_LOC2C_03, "DW_OP_mod"); \
c->last_error = c->error_buffer; \
goto deref_fault; \
} \
a % b; \
})
/* Given a DWARF register number, fetch its intptr_t (long) value from the
probe context, or store a new value into the probe context.
The register number argument is always a canonical decimal number, so it
can be pasted into an identifier name. These definitions turn it into a
per-register macro, defined below for machines with individually-named
registers. */
#define pt_regs_fetch_register(pt_regs, regno) \
((intptr_t) pt_dwarf_register_##regno (pt_regs))
#define pt_regs_store_register(pt_regs, regno, value) \
(pt_dwarf_register_##regno (pt_regs) = (value))
#if defined (STAPCONF_X86_UNIREGS) && defined (__i386__)
#define pt_dwarf_register_0(regs) regs->ax
#define pt_dwarf_register_1(regs) regs->cx
#define pt_dwarf_register_2(regs) regs->dx
#define pt_dwarf_register_3(regs) regs->bx
#define pt_dwarf_register_4(regs) ((long) ®s->sp)
#define pt_dwarf_register_5(regs) regs->bp
#define pt_dwarf_register_6(regs) regs->si
#define pt_dwarf_register_7(regs) regs->di
#elif defined (STAPCONF_X86_UNIREGS) && defined (__x86_64__)
#define pt_dwarf_register_0(regs) regs->ax
#define pt_dwarf_register_1(regs) regs->dx
#define pt_dwarf_register_2(regs) regs->cx
#define pt_dwarf_register_3(regs) regs->bx
#define pt_dwarf_register_4(regs) regs->si
#define pt_dwarf_register_5(regs) regs->di
#define pt_dwarf_register_6(regs) regs->bp
#define pt_dwarf_register_7(regs) regs->sp
#define pt_dwarf_register_8(regs) regs->r8
#define pt_dwarf_register_9(regs) regs->r9
#define pt_dwarf_register_10(regs) regs->r10
#define pt_dwarf_register_11(regs) regs->r11
#define pt_dwarf_register_12(regs) regs->r12
#define pt_dwarf_register_13(regs) regs->r13
#define pt_dwarf_register_14(regs) regs->r14
#define pt_dwarf_register_15(regs) regs->r15
#elif defined __i386__
/* The stack pointer is unlike other registers. When a trap happens in
kernel mode, it is not saved in the trap frame (struct pt_regs).
The `esp' (and `xss') fields are valid only for a user-mode trap.
For a kernel mode trap, the interrupted state's esp is actually an
address inside where the `struct pt_regs' on the kernel trap stack points. */
#define pt_dwarf_register_0(regs) regs->eax
#define pt_dwarf_register_1(regs) regs->ecx
#define pt_dwarf_register_2(regs) regs->edx
#define pt_dwarf_register_3(regs) regs->ebx
#define pt_dwarf_register_4(regs) (user_mode(regs) ? regs->esp : (long)®s->esp)
#define pt_dwarf_register_5(regs) regs->ebp
#define pt_dwarf_register_6(regs) regs->esi
#define pt_dwarf_register_7(regs) regs->edi
#elif defined __ia64__
#undef pt_regs_fetch_register
#undef pt_regs_store_register
#define pt_regs_fetch_register(pt_regs,regno) \
ia64_fetch_register(regno, pt_regs, &c->unwaddr)
#define pt_regs_store_register(pt_regs,regno,value) \
ia64_store_register(regno, pt_regs, value)
#elif defined __x86_64__
#define pt_dwarf_register_0(regs) regs->rax
#define pt_dwarf_register_1(regs) regs->rdx
#define pt_dwarf_register_2(regs) regs->rcx
#define pt_dwarf_register_3(regs) regs->rbx
#define pt_dwarf_register_4(regs) regs->rsi
#define pt_dwarf_register_5(regs) regs->rdi
#define pt_dwarf_register_6(regs) regs->rbp
#define pt_dwarf_register_7(regs) regs->rsp
#define pt_dwarf_register_8(regs) regs->r8
#define pt_dwarf_register_9(regs) regs->r9
#define pt_dwarf_register_10(regs) regs->r10
#define pt_dwarf_register_11(regs) regs->r11
#define pt_dwarf_register_12(regs) regs->r12
#define pt_dwarf_register_13(regs) regs->r13
#define pt_dwarf_register_14(regs) regs->r14
#define pt_dwarf_register_15(regs) regs->r15
#elif defined __powerpc__
#undef pt_regs_fetch_register
#undef pt_regs_store_register
#define pt_regs_fetch_register(pt_regs,regno) \
((intptr_t) pt_regs->gpr[regno])
#define pt_regs_store_register(pt_regs,regno,value) \
(pt_regs->gpr[regno] = (value))
#elif defined (__aarch64__)
#undef pt_regs_fetch_register
#undef pt_regs_store_register
#define pt_regs_fetch_register(pt_regs,regno) \
((long) pt_regs->regs[regno])
#define pt_regs_store_register(pt_regs,regno,value) \
(pt_regs->regs[regno] = (value))
#elif defined (__arm__)
#undef pt_regs_fetch_register
#undef pt_regs_store_register
#define pt_regs_fetch_register(pt_regs,regno) \
((long) pt_regs->uregs[regno])
#define pt_regs_store_register(pt_regs,regno,value) \
(pt_regs->uregs[regno] = (value))
#elif defined (__s390__) || defined (__s390x__)
#undef pt_regs_fetch_register
#undef pt_regs_store_register
#define pt_regs_fetch_register(pt_regs,regno) \
((intptr_t) pt_regs->gprs[regno])
#define pt_regs_store_register(pt_regs,regno,value) \
(pt_regs->gprs[regno] = (value))
#endif
#if STP_SKIP_BADVARS
#define DEREF_FAULT(addr) ({0; })
#define STORE_DEREF_FAULT(addr) ({0; })
#define CATCH_DEREF_FAULT() ({0; })
#else
#define DEREF_FAULT(addr) ({ \
snprintf(c->error_buffer, sizeof(c->error_buffer), \
STAP_MSG_LOC2C_01, (void *)(intptr_t)(addr), #addr); \
c->last_error = c->error_buffer; \
goto deref_fault; \
})
#define STORE_DEREF_FAULT(addr) ({ \
snprintf(c->error_buffer, sizeof(c->error_buffer), \
STAP_MSG_LOC2C_02, (void *)(intptr_t)(addr), #addr); \
c->last_error = c->error_buffer; \
goto deref_fault; \
})
#define CATCH_DEREF_FAULT() \
if (0) { \
deref_fault: ; \
}
#endif
#endif /* _LOC2C_RUNTIME_H_ */
|