bab3981608
The libgcc runtime library provides __register_frame and __deregister_frame functions, which can be used by dynamic code generators to register an .eh_frame section, which contains one or more Call Frame Information records, each consisting of a Common Information Entry record followed by one or more Frame Description Entry records. This libunwind library also provides __register_frame and __deregister_frame functions, but they are aliases for __unw_add_dynamic_fde and __unw_remove_dynamic_fde and thus can only take a single FDE. This patch adds __unw_add_dynamic_eh_frame_section and __unw_remove_dynamic_eh_frame_section functions which explicitly use the .eh_frame format. Clients such as the ORCv2 platform and runtime can check for these functions and use them if unwinding is being provided by libunwind, or fall back to __register_frame and __deregister_frame if unwinding is provided by libgcc. Reviewed By: lhames Differential Revision: https://reviews.llvm.org/D111863
69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//
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// Extensions to libunwind API.
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//
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//===----------------------------------------------------------------------===//
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#ifndef __LIBUNWIND_EXT__
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#define __LIBUNWIND_EXT__
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#include "config.h"
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#include <libunwind.h>
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#include <unwind.h>
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#define UNW_STEP_SUCCESS 1
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#define UNW_STEP_END 0
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern int __unw_getcontext(unw_context_t *);
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extern int __unw_init_local(unw_cursor_t *, unw_context_t *);
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extern int __unw_step(unw_cursor_t *);
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extern int __unw_get_reg(unw_cursor_t *, unw_regnum_t, unw_word_t *);
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extern int __unw_get_fpreg(unw_cursor_t *, unw_regnum_t, unw_fpreg_t *);
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extern int __unw_set_reg(unw_cursor_t *, unw_regnum_t, unw_word_t);
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extern int __unw_set_fpreg(unw_cursor_t *, unw_regnum_t, unw_fpreg_t);
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extern int __unw_resume(unw_cursor_t *);
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#ifdef __arm__
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/* Save VFP registers in FSTMX format (instead of FSTMD). */
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extern void __unw_save_vfp_as_X(unw_cursor_t *);
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#endif
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extern const char *__unw_regname(unw_cursor_t *, unw_regnum_t);
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extern int __unw_get_proc_info(unw_cursor_t *, unw_proc_info_t *);
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extern int __unw_is_fpreg(unw_cursor_t *, unw_regnum_t);
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extern int __unw_is_signal_frame(unw_cursor_t *);
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extern int __unw_get_proc_name(unw_cursor_t *, char *, size_t, unw_word_t *);
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// SPI
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extern void __unw_iterate_dwarf_unwind_cache(void (*func)(
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unw_word_t ip_start, unw_word_t ip_end, unw_word_t fde, unw_word_t mh));
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// IPI
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extern void __unw_add_dynamic_fde(unw_word_t fde);
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extern void __unw_remove_dynamic_fde(unw_word_t fde);
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extern void __unw_add_dynamic_eh_frame_section(unw_word_t eh_frame_start);
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extern void __unw_remove_dynamic_eh_frame_section(unw_word_t eh_frame_start);
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#if defined(_LIBUNWIND_ARM_EHABI)
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extern const uint32_t* decode_eht_entry(const uint32_t*, size_t*, size_t*);
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extern _Unwind_Reason_Code _Unwind_VRS_Interpret(_Unwind_Context *context,
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const uint32_t *data,
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size_t offset, size_t len);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif // __LIBUNWIND_EXT__
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