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Diffstat (limited to 'include/libunwind-arm.h')
| -rw-r--r-- | include/libunwind-arm.h | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/include/libunwind-arm.h b/include/libunwind-arm.h new file mode 100644 index 00000000..492331e4 --- /dev/null +++ b/include/libunwind-arm.h @@ -0,0 +1,298 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2008 CodeSourcery + +This file is part of libunwind. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ + +#ifndef LIBUNWIND_H +#define LIBUNWIND_H + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#include <inttypes.h> +#include <ucontext.h> + +#define UNW_TARGET arm +#define UNW_TARGET_ARM 1 + +#define _U_TDEP_QP_TRUE 0 /* see libunwind-dynamic.h */ + +/* This needs to be big enough to accommodate "struct cursor", while + leaving some slack for future expansion. Changing this value will + require recompiling all users of this library. Stack allocation is + relatively cheap and unwind-state copying is relatively rare, so we + want to err on making it rather too big than too small. */ + +/* FIXME for ARM. Too big? What do other things use for similar tasks? */ +#define UNW_TDEP_CURSOR_LEN 4096 + +typedef uint32_t unw_word_t; +typedef int32_t unw_sword_t; + +typedef long double unw_tdep_fpreg_t; + +typedef enum + { + UNW_ARM_R0, + UNW_ARM_R1, + UNW_ARM_R2, + UNW_ARM_R3, + UNW_ARM_R4, + UNW_ARM_R5, + UNW_ARM_R6, + UNW_ARM_R7, + UNW_ARM_R8, + UNW_ARM_R9, + UNW_ARM_R10, + UNW_ARM_R11, + UNW_ARM_R12, + UNW_ARM_R13, + UNW_ARM_R14, + UNW_ARM_R15, + + /* VFPv2 s0-s31 (obsolescent numberings). */ + UNW_ARM_S0 = 64, + UNW_ARM_S1, + UNW_ARM_S2, + UNW_ARM_S3, + UNW_ARM_S4, + UNW_ARM_S5, + UNW_ARM_S6, + UNW_ARM_S7, + UNW_ARM_S8, + UNW_ARM_S9, + UNW_ARM_S10, + UNW_ARM_S11, + UNW_ARM_S12, + UNW_ARM_S13, + UNW_ARM_S14, + UNW_ARM_S15, + UNW_ARM_S16, + UNW_ARM_S17, + UNW_ARM_S18, + UNW_ARM_S19, + UNW_ARM_S20, + UNW_ARM_S21, + UNW_ARM_S22, + UNW_ARM_S23, + UNW_ARM_S24, + UNW_ARM_S25, + UNW_ARM_S26, + UNW_ARM_S27, + UNW_ARM_S28, + UNW_ARM_S29, + UNW_ARM_S30, + UNW_ARM_S31, + + /* FPA register numberings. */ + UNW_ARM_F0 = 96, + UNW_ARM_F1, + UNW_ARM_F2, + UNW_ARM_F3, + UNW_ARM_F4, + UNW_ARM_F5, + UNW_ARM_F6, + UNW_ARM_F7, + + /* iWMMXt GR register numberings. */ + UNW_ARM_wCGR0 = 104, + UNW_ARM_wCGR1, + UNW_ARM_wCGR2, + UNW_ARM_wCGR3, + UNW_ARM_wCGR4, + UNW_ARM_wCGR5, + UNW_ARM_wCGR6, + UNW_ARM_wCGR7, + + /* iWMMXt register numberings. */ + UNW_ARM_wR0 = 112, + UNW_ARM_wR1, + UNW_ARM_wR2, + UNW_ARM_wR3, + UNW_ARM_wR4, + UNW_ARM_wR5, + UNW_ARM_wR6, + UNW_ARM_wR7, + UNW_ARM_wR8, + UNW_ARM_wR9, + UNW_ARM_wR10, + UNW_ARM_wR11, + UNW_ARM_wR12, + UNW_ARM_wR13, + UNW_ARM_wR14, + UNW_ARM_wR15, + + /* Two-byte encodings from here on. */ + + /* SPSR. */ + UNW_ARM_SPSR = 128, + UNW_ARM_SPSR_FIQ, + UNW_ARM_SPSR_IRQ, + UNW_ARM_SPSR_ABT, + UNW_ARM_SPSR_UND, + UNW_ARM_SPSR_SVC, + + /* User mode registers. */ + UNW_ARM_R8_USR = 144, + UNW_ARM_R9_USR, + UNW_ARM_R10_USR, + UNW_ARM_R11_USR, + UNW_ARM_R12_USR, + UNW_ARM_R13_USR, + UNW_ARM_R14_USR, + + /* FIQ registers. */ + UNW_ARM_R8_FIQ = 151, + UNW_ARM_R9_FIQ, + UNW_ARM_R10_FIQ, + UNW_ARM_R11_FIQ, + UNW_ARM_R12_FIQ, + UNW_ARM_R13_FIQ, + UNW_ARM_R14_FIQ, + + /* IRQ registers. */ + UNW_ARM_R13_IRQ = 158, + UNW_ARM_R14_IRQ, + + /* ABT registers. */ + UNW_ARM_R13_ABT = 160, + UNW_ARM_R14_ABT, + + /* UND registers. */ + UNW_ARM_R13_UND = 162, + UNW_ARM_R14_UND, + + /* SVC registers. */ + UNW_ARM_R13_SVC = 164, + UNW_ARM_R14_SVC, + + /* iWMMXt control registers. */ + UNW_ARM_wC0 = 192, + UNW_ARM_wC1, + UNW_ARM_wC2, + UNW_ARM_wC3, + UNW_ARM_wC4, + UNW_ARM_wC5, + UNW_ARM_wC6, + UNW_ARM_wC7, + + /* VFPv3/Neon 64-bit registers. */ + UNW_ARM_D0 = 256, + UNW_ARM_D1, + UNW_ARM_D2, + UNW_ARM_D3, + UNW_ARM_D4, + UNW_ARM_D5, + UNW_ARM_D6, + UNW_ARM_D7, + UNW_ARM_D8, + UNW_ARM_D9, + UNW_ARM_D10, + UNW_ARM_D11, + UNW_ARM_D12, + UNW_ARM_D13, + UNW_ARM_D14, + UNW_ARM_D15, + UNW_ARM_D16, + UNW_ARM_D17, + UNW_ARM_D18, + UNW_ARM_D19, + UNW_ARM_D20, + UNW_ARM_D21, + UNW_ARM_D22, + UNW_ARM_D23, + UNW_ARM_D24, + UNW_ARM_D25, + UNW_ARM_D26, + UNW_ARM_D27, + UNW_ARM_D28, + UNW_ARM_D29, + UNW_ARM_D30, + UNW_ARM_D31, + + /* For ARM, the CFA is the value of SP (r13) at the call site in the + previous frame. */ + UNW_ARM_CFA, + + UNW_TDEP_LAST_REG = UNW_ARM_D31, + + UNW_TDEP_IP = UNW_ARM_R14, /* A little white lie. */ + UNW_TDEP_SP = UNW_ARM_R13, + UNW_TDEP_EH = UNW_ARM_R0 /* FIXME. */ + } +arm_regnum_t; + +#define UNW_TDEP_NUM_EH_REGS 2 /* FIXME for ARM. */ + +typedef struct unw_tdep_save_loc + { + /* Additional target-dependent info on a save location. */ + } +unw_tdep_save_loc_t; + +/* On ARM, we can directly use ucontext_t as the unwind context. */ +typedef ucontext_t unw_tdep_context_t; + +/* There is no getcontext() on ARM. Use a stub version which only saves GP + registers. FIXME: Not ideal, may not be sufficient for all libunwind + use cases. Stores pc+8, which is only approximately correct, really. */ +#ifndef __thumb__ +#define unw_tdep_getcontext(uc) (({ \ + unw_tdep_context_t *unw_ctx = (uc); \ + register int unw_base asm ("r0") \ + = (int) (&unw_ctx->uc_mcontext.arm_r0); \ + __asm__ __volatile__ ( \ + "stmia %[base], {r0-r15}" \ + : : [base] "r" (unw_base) : "memory"); \ + }), 0) +#else /* __thumb__ */ +#define unw_tdep_getcontext(uc) (({ \ + unw_tdep_context_t *unw_ctx = (uc); \ + register int unw_base asm ("r0") \ + = (int) (&unw_ctx->uc_mcontext.arm_r0); \ + __asm__ __volatile__ ( \ + ".align 2\nbx pc\nnop\n.code 32\n" \ + "stmia %[base], {r0-r15}\n" \ + "orr %[base], pc, #1\nbx %[base]" \ + : [base] "+r" (unw_base) : : "memory", "cc"); \ + }), 0) +#endif + +#include "libunwind-dynamic.h" + +typedef struct + { + /* no arm-specific auxiliary proc-info */ + } +unw_tdep_proc_info_t; + +#include "libunwind-common.h" + +#define unw_tdep_is_fpreg UNW_ARCH_OBJ(is_fpreg) +extern int unw_tdep_is_fpreg (int); + +#if defined(__cplusplus) || defined(c_plusplus) +} +#endif + +#endif /* LIBUNWIND_H */ |