mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-15 20:58:13 +01:00
3842dac733
reading of .debug_frame sections (used in lieu of .eh_frame sections when they're not available).
298 lines
6.9 KiB
C
298 lines
6.9 KiB
C
/* 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 */
|