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0eba2169fb
Define unw_tdep_context rather than using ucontext_t in order to support systems that lack ucontext.h. Note that POSIX.1-2008 removed getcontext, makecontext and swapcontext from its specification. Signed-off-by: Ken Werner <ken.werner@linaro.org>
302 lines
7.1 KiB
C
302 lines
7.1 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2008 CodeSourcery
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#ifndef LIBUNWIND_H
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#define LIBUNWIND_H
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#if defined(__cplusplus) || defined(c_plusplus)
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extern "C" {
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#endif
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#include <inttypes.h>
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#include <stddef.h>
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#define UNW_TARGET arm
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#define UNW_TARGET_ARM 1
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#define _U_TDEP_QP_TRUE 0 /* see libunwind-dynamic.h */
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/* This needs to be big enough to accommodate "struct cursor", while
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leaving some slack for future expansion. Changing this value will
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require recompiling all users of this library. Stack allocation is
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relatively cheap and unwind-state copying is relatively rare, so we
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want to err on making it rather too big than too small. */
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/* FIXME for ARM. Too big? What do other things use for similar tasks? */
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#define UNW_TDEP_CURSOR_LEN 4096
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typedef uint32_t unw_word_t;
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typedef int32_t unw_sword_t;
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typedef long double unw_tdep_fpreg_t;
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typedef enum
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{
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UNW_ARM_R0,
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UNW_ARM_R1,
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UNW_ARM_R2,
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UNW_ARM_R3,
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UNW_ARM_R4,
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UNW_ARM_R5,
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UNW_ARM_R6,
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UNW_ARM_R7,
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UNW_ARM_R8,
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UNW_ARM_R9,
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UNW_ARM_R10,
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UNW_ARM_R11,
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UNW_ARM_R12,
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UNW_ARM_R13,
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UNW_ARM_R14,
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UNW_ARM_R15,
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/* VFPv2 s0-s31 (obsolescent numberings). */
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UNW_ARM_S0 = 64,
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UNW_ARM_S1,
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UNW_ARM_S2,
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UNW_ARM_S3,
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UNW_ARM_S4,
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UNW_ARM_S5,
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UNW_ARM_S6,
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UNW_ARM_S7,
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UNW_ARM_S8,
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UNW_ARM_S9,
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UNW_ARM_S10,
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UNW_ARM_S11,
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UNW_ARM_S12,
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UNW_ARM_S13,
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UNW_ARM_S14,
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UNW_ARM_S15,
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UNW_ARM_S16,
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UNW_ARM_S17,
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UNW_ARM_S18,
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UNW_ARM_S19,
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UNW_ARM_S20,
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UNW_ARM_S21,
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UNW_ARM_S22,
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UNW_ARM_S23,
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UNW_ARM_S24,
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UNW_ARM_S25,
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UNW_ARM_S26,
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UNW_ARM_S27,
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UNW_ARM_S28,
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UNW_ARM_S29,
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UNW_ARM_S30,
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UNW_ARM_S31,
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/* FPA register numberings. */
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UNW_ARM_F0 = 96,
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UNW_ARM_F1,
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UNW_ARM_F2,
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UNW_ARM_F3,
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UNW_ARM_F4,
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UNW_ARM_F5,
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UNW_ARM_F6,
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UNW_ARM_F7,
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/* iWMMXt GR register numberings. */
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UNW_ARM_wCGR0 = 104,
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UNW_ARM_wCGR1,
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UNW_ARM_wCGR2,
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UNW_ARM_wCGR3,
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UNW_ARM_wCGR4,
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UNW_ARM_wCGR5,
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UNW_ARM_wCGR6,
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UNW_ARM_wCGR7,
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/* iWMMXt register numberings. */
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UNW_ARM_wR0 = 112,
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UNW_ARM_wR1,
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UNW_ARM_wR2,
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UNW_ARM_wR3,
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UNW_ARM_wR4,
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UNW_ARM_wR5,
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UNW_ARM_wR6,
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UNW_ARM_wR7,
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UNW_ARM_wR8,
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UNW_ARM_wR9,
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UNW_ARM_wR10,
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UNW_ARM_wR11,
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UNW_ARM_wR12,
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UNW_ARM_wR13,
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UNW_ARM_wR14,
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UNW_ARM_wR15,
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/* Two-byte encodings from here on. */
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/* SPSR. */
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UNW_ARM_SPSR = 128,
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UNW_ARM_SPSR_FIQ,
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UNW_ARM_SPSR_IRQ,
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UNW_ARM_SPSR_ABT,
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UNW_ARM_SPSR_UND,
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UNW_ARM_SPSR_SVC,
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/* User mode registers. */
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UNW_ARM_R8_USR = 144,
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UNW_ARM_R9_USR,
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UNW_ARM_R10_USR,
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UNW_ARM_R11_USR,
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UNW_ARM_R12_USR,
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UNW_ARM_R13_USR,
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UNW_ARM_R14_USR,
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/* FIQ registers. */
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UNW_ARM_R8_FIQ = 151,
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UNW_ARM_R9_FIQ,
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UNW_ARM_R10_FIQ,
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UNW_ARM_R11_FIQ,
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UNW_ARM_R12_FIQ,
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UNW_ARM_R13_FIQ,
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UNW_ARM_R14_FIQ,
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/* IRQ registers. */
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UNW_ARM_R13_IRQ = 158,
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UNW_ARM_R14_IRQ,
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/* ABT registers. */
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UNW_ARM_R13_ABT = 160,
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UNW_ARM_R14_ABT,
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/* UND registers. */
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UNW_ARM_R13_UND = 162,
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UNW_ARM_R14_UND,
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/* SVC registers. */
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UNW_ARM_R13_SVC = 164,
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UNW_ARM_R14_SVC,
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/* iWMMXt control registers. */
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UNW_ARM_wC0 = 192,
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UNW_ARM_wC1,
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UNW_ARM_wC2,
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UNW_ARM_wC3,
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UNW_ARM_wC4,
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UNW_ARM_wC5,
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UNW_ARM_wC6,
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UNW_ARM_wC7,
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/* VFPv3/Neon 64-bit registers. */
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UNW_ARM_D0 = 256,
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UNW_ARM_D1,
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UNW_ARM_D2,
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UNW_ARM_D3,
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UNW_ARM_D4,
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UNW_ARM_D5,
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UNW_ARM_D6,
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UNW_ARM_D7,
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UNW_ARM_D8,
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UNW_ARM_D9,
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UNW_ARM_D10,
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UNW_ARM_D11,
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UNW_ARM_D12,
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UNW_ARM_D13,
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UNW_ARM_D14,
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UNW_ARM_D15,
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UNW_ARM_D16,
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UNW_ARM_D17,
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UNW_ARM_D18,
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UNW_ARM_D19,
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UNW_ARM_D20,
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UNW_ARM_D21,
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UNW_ARM_D22,
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UNW_ARM_D23,
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UNW_ARM_D24,
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UNW_ARM_D25,
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UNW_ARM_D26,
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UNW_ARM_D27,
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UNW_ARM_D28,
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UNW_ARM_D29,
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UNW_ARM_D30,
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UNW_ARM_D31,
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/* For ARM, the CFA is the value of SP (r13) at the call site in the
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previous frame. */
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UNW_ARM_CFA,
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UNW_TDEP_LAST_REG = UNW_ARM_D31,
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UNW_TDEP_IP = UNW_ARM_R14, /* A little white lie. */
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UNW_TDEP_SP = UNW_ARM_R13,
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UNW_TDEP_EH = UNW_ARM_R0 /* FIXME. */
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}
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arm_regnum_t;
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#define UNW_TDEP_NUM_EH_REGS 2 /* FIXME for ARM. */
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typedef struct unw_tdep_save_loc
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{
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/* Additional target-dependent info on a save location. */
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}
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unw_tdep_save_loc_t;
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/* On ARM, we define our own unw_tdep_context instead of using ucontext_t.
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This allows us to support systems that don't support getcontext and
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therefore do not define ucontext_t. */
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typedef struct unw_tdep_context
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{
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unsigned long regs[16];
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}
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unw_tdep_context_t;
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/* There is no getcontext() on ARM. Use a stub version which only saves GP
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registers. FIXME: Not ideal, may not be sufficient for all libunwind
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use cases. Stores pc+8, which is only approximately correct, really. */
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#ifndef __thumb__
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#define unw_tdep_getcontext(uc) (({ \
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unw_tdep_context_t *unw_ctx = (uc); \
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register unsigned long *unw_base asm ("r0") = unw_ctx->regs; \
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__asm__ __volatile__ ( \
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"stmia %[base], {r0-r15}" \
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: : [base] "r" (unw_base) : "memory"); \
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}), 0)
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#else /* __thumb__ */
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#define unw_tdep_getcontext(uc) (({ \
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unw_tdep_context_t *unw_ctx = (uc); \
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register unsigned long *unw_base asm ("r0") = unw_ctx->regs; \
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__asm__ __volatile__ ( \
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".align 2\nbx pc\nnop\n.code 32\n" \
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"stmia %[base], {r0-r15}\n" \
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"orr %[base], pc, #1\nbx %[base]" \
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: [base] "+r" (unw_base) : : "memory", "cc"); \
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}), 0)
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#endif
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#include "libunwind-dynamic.h"
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typedef struct
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{
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/* no arm-specific auxiliary proc-info */
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}
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unw_tdep_proc_info_t;
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#include "libunwind-common.h"
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#define unw_tdep_is_fpreg UNW_ARCH_OBJ(is_fpreg)
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extern int unw_tdep_is_fpreg (int);
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#if defined(__cplusplus) || defined(c_plusplus)
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}
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#endif
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#endif /* LIBUNWIND_H */
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