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https://github.com/tobast/libunwind-eh_elf.git
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5f38f35d5d
Dropping the extra frame for unw_backtrace itself using unw_step is approximately 15% slower than skipping the frame in tdep_trace. So drop the frame in the latter, and make the function a private implementation detail for libunwind, not an exported interface. Also moves unw_getcontext call back into unw_backtrace to avoid an extra call frame in case slow_backtrace does not get inlined into unw_backtrace.
125 lines
3.8 KiB
C
125 lines
3.8 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2003-2004 Hewlett-Packard Co
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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 <ucontext.h>
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#define UNW_TARGET hppa
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#define UNW_TARGET_HPPA 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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#define UNW_TDEP_CURSOR_LEN 511
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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 union
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{
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struct { unw_word_t bits[2]; } raw;
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double val;
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}
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unw_tdep_fpreg_t;
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typedef enum
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{
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/* Note: general registers are expected to start with index 0.
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This convention facilitates architecture-independent
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implementation of the C++ exception handling ABI. See
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_Unwind_SetGR() and _Unwind_GetGR() for details. */
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UNW_HPPA_GR = 0,
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UNW_HPPA_RP = 2, /* return pointer */
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UNW_HPPA_FP = 3, /* frame pointer */
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UNW_HPPA_SP = UNW_HPPA_GR + 30,
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UNW_HPPA_FR = UNW_HPPA_GR + 32,
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UNW_HPPA_IP = UNW_HPPA_FR + 32, /* instruction pointer */
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/* other "preserved" registers (fpsr etc.)... */
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/* PA-RISC has 4 exception-argument registers but they're not
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contiguous. To deal with this, we define 4 pseudo
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exception-handling registers which we then alias to the actual
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physical register. */
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UNW_HPPA_EH0 = UNW_HPPA_IP + 1, /* alias for UNW_HPPA_GR + 20 */
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UNW_HPPA_EH1 = UNW_HPPA_EH0 + 1, /* alias for UNW_HPPA_GR + 21 */
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UNW_HPPA_EH2 = UNW_HPPA_EH1 + 1, /* alias for UNW_HPPA_GR + 22 */
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UNW_HPPA_EH3 = UNW_HPPA_EH2 + 1, /* alias for UNW_HPPA_GR + 31 */
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/* frame info (read-only) */
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UNW_HPPA_CFA,
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UNW_TDEP_LAST_REG = UNW_HPPA_IP,
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UNW_TDEP_IP = UNW_HPPA_IP,
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UNW_TDEP_SP = UNW_HPPA_SP,
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UNW_TDEP_EH = UNW_HPPA_EH0
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}
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hppa_regnum_t;
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#define UNW_TDEP_NUM_EH_REGS 4
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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 PA-RISC, we can directly use ucontext_t as the unwind context. */
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typedef ucontext_t unw_tdep_context_t;
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#define unw_tdep_is_fpreg(r) ((unsigned) ((r) - UNW_HPPA_FR) < 32)
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#include "libunwind-dynamic.h"
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typedef struct
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{
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/* no PA-RISC-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_getcontext UNW_ARCH_OBJ (getcontext)
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extern int unw_tdep_getcontext (unw_tdep_context_t *);
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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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