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/* target operations
* Copyright (C) 2005-2019 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
#define pt_regs_maxno 7
#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
#define pt_dwarf_register_17(regs) ({uint64_t v; __asm__ __volatile__("movq %%xmm0, %0" : "=r"(v)); v;})
#define pt_dwarf_register_18(regs) ({uint64_t v; __asm__ __volatile__("movq %%xmm1, %0" : "=r"(v)); v;})
#define pt_dwarf_register_19(regs) ({uint64_t v; __asm__ __volatile__("movq %%xmm2, %0" : "=r"(v)); v;})
#define pt_dwarf_register_20(regs) ({uint64_t v; __asm__ __volatile__("movq %%xmm3, %0" : "=r"(v)); v;})
#define pt_dwarf_register_21(regs) ({uint64_t v; __asm__ __volatile__("movq %%xmm4, %0" : "=r"(v)); v;})
#define pt_dwarf_register_22(regs) ({uint64_t v; __asm__ __volatile__("movq %%xmm5, %0" : "=r"(v)); v;})
#define pt_dwarf_register_23(regs) ({uint64_t v; __asm__ __volatile__("movq %%xmm6, %0" : "=r"(v)); v;})
#define pt_dwarf_register_24(regs) ({uint64_t v; __asm__ __volatile__("movq %%xmm7, %0" : "=r"(v)); v;})
#define pt_regs_maxno 24
#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
#define pt_regs_maxno 7
#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)
#define pt_regs_maxno 128 /* ish */
#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
#define pt_regs_maxno 15
#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))
#define pt_regs_maxno 31 /* though PT_REGS_COUNT=44 */
#elif defined __mips__
#undef pt_regs_fetch_register
#undef pt_regs_store_register
#define pt_regs_fetch_register(pt_regs,regno) \
((intptr_t) pt_regs->regs[regno])
#define pt_regs_store_register(pt_regs,regno,value) \
(pt_regs->regs[regno] = (value))
#define pt_regs_maxno 31 /* ignore special registers */
#elif defined (__aarch64__)
#define pt_dwarf_register_0(pt_regs) pt_regs->regs[0]
#define pt_dwarf_register_1(pt_regs) pt_regs->regs[1]
#define pt_dwarf_register_2(pt_regs) pt_regs->regs[2]
#define pt_dwarf_register_3(pt_regs) pt_regs->regs[3]
#define pt_dwarf_register_4(pt_regs) pt_regs->regs[4]
#define pt_dwarf_register_5(pt_regs) pt_regs->regs[5]
#define pt_dwarf_register_6(pt_regs) pt_regs->regs[6]
#define pt_dwarf_register_7(pt_regs) pt_regs->regs[7]
#define pt_dwarf_register_8(pt_regs) pt_regs->regs[8]
#define pt_dwarf_register_9(pt_regs) pt_regs->regs[9]
#define pt_dwarf_register_10(pt_regs) pt_regs->regs[10]
#define pt_dwarf_register_11(pt_regs) pt_regs->regs[11]
#define pt_dwarf_register_12(pt_regs) pt_regs->regs[12]
#define pt_dwarf_register_13(pt_regs) pt_regs->regs[13]
#define pt_dwarf_register_14(pt_regs) pt_regs->regs[14]
#define pt_dwarf_register_15(pt_regs) pt_regs->regs[15]
#define pt_dwarf_register_16(pt_regs) pt_regs->regs[16]
#define pt_dwarf_register_17(pt_regs) pt_regs->regs[17]
#define pt_dwarf_register_18(pt_regs) pt_regs->regs[18]
#define pt_dwarf_register_19(pt_regs) pt_regs->regs[19]
#define pt_dwarf_register_20(pt_regs) pt_regs->regs[20]
#define pt_dwarf_register_21(pt_regs) pt_regs->regs[21]
#define pt_dwarf_register_22(pt_regs) pt_regs->regs[22]
#define pt_dwarf_register_23(pt_regs) pt_regs->regs[23]
#define pt_dwarf_register_24(pt_regs) pt_regs->regs[24]
#define pt_dwarf_register_25(pt_regs) pt_regs->regs[25]
#define pt_dwarf_register_26(pt_regs) pt_regs->regs[26]
#define pt_dwarf_register_27(pt_regs) pt_regs->regs[27]
#define pt_dwarf_register_28(pt_regs) pt_regs->regs[28]
#define pt_dwarf_register_29(pt_regs) pt_regs->regs[29]
#define pt_dwarf_register_30(pt_regs) pt_regs->regs[30]
#define pt_dwarf_register_31(pt_regs) pt_regs->sp
#define pt_dwarf_register_64(regs) ({uint64_t v; __asm__ __volatile__("mov %0, v0.d[0]" : "=r"(v)); v;})
#define pt_dwarf_register_65(regs) ({uint64_t v; __asm__ __volatile__("mov %0, v1.d[0]" : "=r"(v)); v;})
#define pt_dwarf_register_66(regs) ({uint64_t v; __asm__ __volatile__("mov %0, v2.d[0]" : "=r"(v)); v;})
#define pt_dwarf_register_67(regs) ({uint64_t v; __asm__ __volatile__("mov %0, v3.d[0]" : "=r"(v)); v;})
#define pt_dwarf_register_68(regs) ({uint64_t v; __asm__ __volatile__("mov %0, v4.d[0]" : "=r"(v)); v;})
#define pt_dwarf_register_69(regs) ({uint64_t v; __asm__ __volatile__("mov %0, v5.d[0]" : "=r"(v)); v;})
#define pt_dwarf_register_70(regs) ({uint64_t v; __asm__ __volatile__("mov %0, v6.d[0]" : "=r"(v)); v;})
#define pt_dwarf_register_71(regs) ({uint64_t v; __asm__ __volatile__("mov %0, v7.d[0]" : "=r"(v)); v;})
#define pt_regs_maxno 71
#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))
#define pt_regs_maxno 17
#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))
#define pt_regs_maxno 16 /* NUM_GPRS */
#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, (long)(intptr_t)(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, (long)(intptr_t)(addr)); \
c->last_error = c->error_buffer; \
goto deref_fault; \
})
#define CATCH_DEREF_FAULT() ({0; }) /* always emitted by translator.cxx for functions & probes */
#endif
#endif /* _LOC2C_RUNTIME_H_ */