mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-22 15:47:37 +01:00
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.
207 lines
5.6 KiB
C
207 lines
5.6 KiB
C
/* libunwind - a platform-independent unwind library
|
|
Copyright (C) 2006-2007 IBM
|
|
Contributed by
|
|
Corey Ashford <cjashfor@us.ibm.com>
|
|
Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
|
|
|
|
Copied from libunwind-x86_64.h, modified slightly for building
|
|
frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
|
|
Will be replaced when libunwind is ready on ppc64 platform.
|
|
|
|
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 ppc32
|
|
#define UNW_TARGET_PPC32 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.
|
|
*
|
|
* To simplify this whole process, we are at least initially taking the
|
|
* tack that UNW_PPC32_* map straight across to the .eh_frame column register
|
|
* numbers. These register numbers come from gcc's source in
|
|
* gcc/config/rs6000/rs6000.h
|
|
*
|
|
* UNW_TDEP_CURSOR_LEN is in terms of unw_word_t size. Since we have 115
|
|
* elements in the loc array, each sized 2 * unw_word_t, plus the rest of
|
|
* the cursor struct, this puts us at about 2 * 115 + 40 = 270. Let's
|
|
* round that up to 280.
|
|
*/
|
|
|
|
#define UNW_TDEP_CURSOR_LEN 200
|
|
|
|
#if __WORDSIZE==32
|
|
typedef uint32_t unw_word_t;
|
|
typedef int32_t unw_sword_t;
|
|
#else
|
|
typedef uint64_t unw_word_t;
|
|
typedef int64_t unw_sword_t;
|
|
#endif
|
|
|
|
typedef long double unw_tdep_fpreg_t;
|
|
|
|
typedef enum
|
|
{
|
|
UNW_PPC32_R0,
|
|
UNW_PPC32_R1, /* called STACK_POINTER in gcc */
|
|
UNW_PPC32_R2,
|
|
UNW_PPC32_R3,
|
|
UNW_PPC32_R4,
|
|
UNW_PPC32_R5,
|
|
UNW_PPC32_R6,
|
|
UNW_PPC32_R7,
|
|
UNW_PPC32_R8,
|
|
UNW_PPC32_R9,
|
|
UNW_PPC32_R10,
|
|
UNW_PPC32_R11, /* called STATIC_CHAIN in gcc */
|
|
UNW_PPC32_R12,
|
|
UNW_PPC32_R13,
|
|
UNW_PPC32_R14,
|
|
UNW_PPC32_R15,
|
|
UNW_PPC32_R16,
|
|
UNW_PPC32_R17,
|
|
UNW_PPC32_R18,
|
|
UNW_PPC32_R19,
|
|
UNW_PPC32_R20,
|
|
UNW_PPC32_R21,
|
|
UNW_PPC32_R22,
|
|
UNW_PPC32_R23,
|
|
UNW_PPC32_R24,
|
|
UNW_PPC32_R25,
|
|
UNW_PPC32_R26,
|
|
UNW_PPC32_R27,
|
|
UNW_PPC32_R28,
|
|
UNW_PPC32_R29,
|
|
UNW_PPC32_R30,
|
|
UNW_PPC32_R31, /* called HARD_FRAME_POINTER in gcc */
|
|
|
|
/* Count Register */
|
|
UNW_PPC32_CTR = 32,
|
|
/* Fixed-Point Status and Control Register */
|
|
UNW_PPC32_XER = 33,
|
|
/* Condition Register */
|
|
UNW_PPC32_CCR = 34,
|
|
/* Machine State Register */
|
|
//UNW_PPC32_MSR = 35,
|
|
/* MQ or SPR0, not part of generic Power, part of MPC601 */
|
|
//UNW_PPC32_MQ = 36,
|
|
/* Link Register */
|
|
UNW_PPC32_LR = 36,
|
|
/* Floating Pointer Status and Control Register */
|
|
UNW_PPC32_FPSCR = 37,
|
|
|
|
UNW_PPC32_F0 = 48,
|
|
UNW_PPC32_F1,
|
|
UNW_PPC32_F2,
|
|
UNW_PPC32_F3,
|
|
UNW_PPC32_F4,
|
|
UNW_PPC32_F5,
|
|
UNW_PPC32_F6,
|
|
UNW_PPC32_F7,
|
|
UNW_PPC32_F8,
|
|
UNW_PPC32_F9,
|
|
UNW_PPC32_F10,
|
|
UNW_PPC32_F11,
|
|
UNW_PPC32_F12,
|
|
UNW_PPC32_F13,
|
|
UNW_PPC32_F14,
|
|
UNW_PPC32_F15,
|
|
UNW_PPC32_F16,
|
|
UNW_PPC32_F17,
|
|
UNW_PPC32_F18,
|
|
UNW_PPC32_F19,
|
|
UNW_PPC32_F20,
|
|
UNW_PPC32_F21,
|
|
UNW_PPC32_F22,
|
|
UNW_PPC32_F23,
|
|
UNW_PPC32_F24,
|
|
UNW_PPC32_F25,
|
|
UNW_PPC32_F26,
|
|
UNW_PPC32_F27,
|
|
UNW_PPC32_F28,
|
|
UNW_PPC32_F29,
|
|
UNW_PPC32_F30,
|
|
UNW_PPC32_F31,
|
|
|
|
UNW_TDEP_LAST_REG = UNW_PPC32_F31,
|
|
|
|
UNW_TDEP_IP = UNW_PPC32_LR,
|
|
UNW_TDEP_SP = UNW_PPC32_R1,
|
|
UNW_TDEP_EH = UNW_PPC32_R12
|
|
}
|
|
ppc32_regnum_t;
|
|
|
|
/*
|
|
* According to David Edelsohn, GNU gcc uses R3, R4, R5, and maybe R6 for
|
|
* passing parameters to exception handlers.
|
|
*/
|
|
|
|
#define UNW_TDEP_NUM_EH_REGS 4
|
|
|
|
typedef struct unw_tdep_save_loc
|
|
{
|
|
/* Additional target-dependent info on a save location. */
|
|
}
|
|
unw_tdep_save_loc_t;
|
|
|
|
/* On ppc, we can directly use ucontext_t as the unwind context. */
|
|
typedef ucontext_t unw_tdep_context_t;
|
|
|
|
/* XXX this is not ideal: an application should not be prevented from
|
|
using the "getcontext" name just because it's using libunwind. We
|
|
can't just use __getcontext() either, because that isn't exported
|
|
by glibc... */
|
|
#define unw_tdep_getcontext(uc) (getcontext (uc), 0)
|
|
|
|
#include "libunwind-dynamic.h"
|
|
|
|
typedef struct
|
|
{
|
|
/* no ppc32-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 */
|