mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-25 16:47:38 +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.
187 lines
5.8 KiB
C
187 lines
5.8 KiB
C
/* libunwind - a platform-independent unwind library
|
|
Copyright (C) 2002-2004 Hewlett-Packard Co
|
|
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
|
|
|
|
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 <sys/types.h>
|
|
#include <inttypes.h>
|
|
#include <ucontext.h>
|
|
|
|
#define UNW_TARGET x86
|
|
#define UNW_TARGET_X86 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. */
|
|
#define UNW_TDEP_CURSOR_LEN 127
|
|
|
|
typedef uint32_t unw_word_t;
|
|
typedef int32_t unw_sword_t;
|
|
|
|
typedef union {
|
|
struct { uint8_t b[4]; } val32;
|
|
struct { uint8_t b[10]; } val80;
|
|
struct { uint8_t b[16]; } val128;
|
|
} unw_tdep_fpreg_t;
|
|
|
|
typedef enum
|
|
{
|
|
/* Note: general registers are expected to start with index 0.
|
|
This convention facilitates architecture-independent
|
|
implementation of the C++ exception handling ABI. See
|
|
_Unwind_SetGR() and _Unwind_GetGR() for details.
|
|
|
|
The described register usage convention is based on "System V
|
|
Application Binary Interface, Intel386 Architecture Processor
|
|
Supplement, Fourth Edition" at
|
|
|
|
http://www.linuxbase.org/spec/refspecs/elf/abi386-4.pdf
|
|
|
|
It would have been nice to use the same register numbering as
|
|
DWARF, but that doesn't work because the libunwind requires
|
|
that the exception argument registers be consecutive, which the
|
|
wouldn't be with the DWARF numbering. */
|
|
UNW_X86_EAX, /* scratch (exception argument 1) */
|
|
UNW_X86_EDX, /* scratch (exception argument 2) */
|
|
UNW_X86_ECX, /* scratch */
|
|
UNW_X86_EBX, /* preserved */
|
|
UNW_X86_ESI, /* preserved */
|
|
UNW_X86_EDI, /* preserved */
|
|
UNW_X86_EBP, /* (optional) frame-register */
|
|
UNW_X86_ESP, /* (optional) frame-register */
|
|
UNW_X86_EIP, /* frame-register */
|
|
UNW_X86_EFLAGS, /* scratch (except for "direction", which is fixed */
|
|
UNW_X86_TRAPNO, /* scratch */
|
|
|
|
/* MMX/stacked-fp registers */
|
|
UNW_X86_ST0, /* fp return value */
|
|
UNW_X86_ST1, /* scratch */
|
|
UNW_X86_ST2, /* scratch */
|
|
UNW_X86_ST3, /* scratch */
|
|
UNW_X86_ST4, /* scratch */
|
|
UNW_X86_ST5, /* scratch */
|
|
UNW_X86_ST6, /* scratch */
|
|
UNW_X86_ST7, /* scratch */
|
|
|
|
UNW_X86_FCW, /* scratch */
|
|
UNW_X86_FSW, /* scratch */
|
|
UNW_X86_FTW, /* scratch */
|
|
UNW_X86_FOP, /* scratch */
|
|
UNW_X86_FCS, /* scratch */
|
|
UNW_X86_FIP, /* scratch */
|
|
UNW_X86_FEA, /* scratch */
|
|
UNW_X86_FDS, /* scratch */
|
|
|
|
/* SSE registers */
|
|
UNW_X86_XMM0_lo, /* scratch */
|
|
UNW_X86_XMM0_hi, /* scratch */
|
|
UNW_X86_XMM1_lo, /* scratch */
|
|
UNW_X86_XMM1_hi, /* scratch */
|
|
UNW_X86_XMM2_lo, /* scratch */
|
|
UNW_X86_XMM2_hi, /* scratch */
|
|
UNW_X86_XMM3_lo, /* scratch */
|
|
UNW_X86_XMM3_hi, /* scratch */
|
|
UNW_X86_XMM4_lo, /* scratch */
|
|
UNW_X86_XMM4_hi, /* scratch */
|
|
UNW_X86_XMM5_lo, /* scratch */
|
|
UNW_X86_XMM5_hi, /* scratch */
|
|
UNW_X86_XMM6_lo, /* scratch */
|
|
UNW_X86_XMM6_hi, /* scratch */
|
|
UNW_X86_XMM7_lo, /* scratch */
|
|
UNW_X86_XMM7_hi, /* scratch */
|
|
|
|
UNW_X86_MXCSR, /* scratch */
|
|
|
|
/* segment registers */
|
|
UNW_X86_GS, /* special */
|
|
UNW_X86_FS, /* special */
|
|
UNW_X86_ES, /* special */
|
|
UNW_X86_DS, /* special */
|
|
UNW_X86_SS, /* special */
|
|
UNW_X86_CS, /* special */
|
|
UNW_X86_TSS, /* special */
|
|
UNW_X86_LDT, /* special */
|
|
|
|
/* frame info (read-only) */
|
|
UNW_X86_CFA,
|
|
|
|
UNW_X86_XMM0, /* scratch */
|
|
UNW_X86_XMM1, /* scratch */
|
|
UNW_X86_XMM2, /* scratch */
|
|
UNW_X86_XMM3, /* scratch */
|
|
UNW_X86_XMM4, /* scratch */
|
|
UNW_X86_XMM5, /* scratch */
|
|
UNW_X86_XMM6, /* scratch */
|
|
UNW_X86_XMM7, /* scratch */
|
|
|
|
UNW_TDEP_LAST_REG = UNW_X86_XMM7,
|
|
|
|
UNW_TDEP_IP = UNW_X86_EIP,
|
|
UNW_TDEP_SP = UNW_X86_ESP,
|
|
UNW_TDEP_EH = UNW_X86_EAX
|
|
}
|
|
x86_regnum_t;
|
|
|
|
#define UNW_TDEP_NUM_EH_REGS 2 /* eax and edx are exception args */
|
|
|
|
typedef struct unw_tdep_save_loc
|
|
{
|
|
/* Additional target-dependent info on a save location. */
|
|
}
|
|
unw_tdep_save_loc_t;
|
|
|
|
/* On x86, we can directly use ucontext_t as the unwind context. */
|
|
typedef ucontext_t unw_tdep_context_t;
|
|
|
|
#include "libunwind-dynamic.h"
|
|
|
|
typedef struct
|
|
{
|
|
/* no x86-specific auxiliary proc-info */
|
|
}
|
|
unw_tdep_proc_info_t;
|
|
|
|
#include "libunwind-common.h"
|
|
|
|
#define unw_tdep_getcontext UNW_ARCH_OBJ(getcontext)
|
|
extern int unw_tdep_getcontext (unw_tdep_context_t *);
|
|
|
|
#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 */
|