gcc/libgcc/unwind-generic.h

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/* Exception handling and frame unwind runtime interface routines.
Copyright (C) 2001-2020 Free Software Foundation, Inc.
Makefile.in, [...]: replace "GNU CC" with "GCC". * Makefile.in, alias.c, basic-block.h, bb-reorder.c, bitmap.c, bitmap.h, builtin-types.def, builtins.c, builtins.def, c-aux-info.c, c-common.c, c-common.def, c-common.h, c-convert.c, c-decl.c, c-dump.c, c-dump.h, c-errors.c, c-format.c, c-lang.c, c-lex.c, c-lex.h, c-parse.in, c-pragma.c, c-pragma.h, c-semantics.c, c-tree.h, c-typeck.c, caller-save.c, calls.c, collect2.c, collect2.h, combine.c, conditions.h, config.gcc, configure.frag, configure.in, conflict.c, convert.c, convert.h, cppspec.c, crtstuff.c, cse.c, cselib.c, cselib.h, dbxout.c, dbxout.h, defaults.h, dependence.c, df.c, df.h, diagnostic.c, diagnostic.h, doloop.c, dominance.c, dwarf.h, dwarf2.h, dwarf2asm.c, dwarf2asm.h, dwarf2out.c, dwarf2out.h, dwarfout.c, emit-rtl.c, errors.c, errors.h, except.c, except.h, exgettext, explow.c, expmed.c, expr.c, expr.h, final.c, fixproto, flags.h, flow.c, fold-const.c, fp-test.c, function.c, function.h, gbl-ctors.h, gcc.c, gcc.h, gcc.hlp, gccspec.c, gcov-io.h, gcse.c, genattr.c, genattrtab.c, gencheck.c, gencodes.c, genconfig.c, genemit.c, genextract.c, genflags.c, gengenrtl.c, genmultilib, genopinit.c, genoutput.c, genpeep.c, genrecog.c, gensupport.c, gensupport.h, ggc-callbacks.c, ggc-common.c, ggc-none.c, ggc-page.c, ggc-simple.c, ggc.h, global.c, graph.c, graph.h, gthr-aix.h, gthr-dce.h, gthr-posix.h, gthr-rtems.h, gthr-single.h, gthr-solaris.h, gthr-vxworks.h, gthr-win32.h, gthr.h, haifa-sched.c, halfpic.c, halfpic.h, hard-reg-set.h, hwint.h, ifcvt.c, input.h, insn-addr.h, integrate.c, integrate.h, jump.c, lcm.c, libgcc2.c, libgcc2.h, lists.c, local-alloc.c, loop.c, loop.h, machmode.def, machmode.h, main.c, mbchar.c, mbchar.h, mips-tdump.c, mips-tfile.c, mklibgcc.in, mkmap-flat.awk, mkmap-symver.awk, optabs.c, output.h, params.c, params.def, params.h, predict.c, predict.def, predict.h, prefix.c, prefix.h, print-rtl.c, print-tree.c, profile.c, protoize.c, read-rtl.c, real.c, real.h, recog.c, recog.h, reg-stack.c, regclass.c, regmove.c, regrename.c, regs.h, reload.c, reload.h, reload1.c, reorg.c, resource.c, resource.h, rtl.c, rtl.def, rtl.h, rtlanal.c, sbitmap.c, sbitmap.h, sched-deps.c, sched-ebb.c, sched-int.h, sched-rgn.c, sched-vis.c, sdbout.c, sdbout.h, sibcall.c, simplify-rtx.c, ssa-ccp.c, ssa-dce.c, ssa.c, ssa.h, stmt.c, stor-layout.c, stringpool.c, system.h, timevar.c, timevar.def, timevar.h, tlink.c, toplev.c, toplev.h, tree.c, tree.def, tree.h, tsystem.h, unroll.c, unwind-dw2-fde.c, unwind-dw2-fde.h, unwind-dw2.c, unwind-pe.h, unwind-sjlj.c, unwind.h, unwind.inc, varasm.c, varray.c, varray.h, xcoffout.c, xcoffout.h: replace "GNU CC" with "GCC". From-SVN: r45105
2001-08-22 16:35:51 +02:00
This file is part of GCC.
Makefile.in, [...]: replace "GNU CC" with "GCC". * Makefile.in, alias.c, basic-block.h, bb-reorder.c, bitmap.c, bitmap.h, builtin-types.def, builtins.c, builtins.def, c-aux-info.c, c-common.c, c-common.def, c-common.h, c-convert.c, c-decl.c, c-dump.c, c-dump.h, c-errors.c, c-format.c, c-lang.c, c-lex.c, c-lex.h, c-parse.in, c-pragma.c, c-pragma.h, c-semantics.c, c-tree.h, c-typeck.c, caller-save.c, calls.c, collect2.c, collect2.h, combine.c, conditions.h, config.gcc, configure.frag, configure.in, conflict.c, convert.c, convert.h, cppspec.c, crtstuff.c, cse.c, cselib.c, cselib.h, dbxout.c, dbxout.h, defaults.h, dependence.c, df.c, df.h, diagnostic.c, diagnostic.h, doloop.c, dominance.c, dwarf.h, dwarf2.h, dwarf2asm.c, dwarf2asm.h, dwarf2out.c, dwarf2out.h, dwarfout.c, emit-rtl.c, errors.c, errors.h, except.c, except.h, exgettext, explow.c, expmed.c, expr.c, expr.h, final.c, fixproto, flags.h, flow.c, fold-const.c, fp-test.c, function.c, function.h, gbl-ctors.h, gcc.c, gcc.h, gcc.hlp, gccspec.c, gcov-io.h, gcse.c, genattr.c, genattrtab.c, gencheck.c, gencodes.c, genconfig.c, genemit.c, genextract.c, genflags.c, gengenrtl.c, genmultilib, genopinit.c, genoutput.c, genpeep.c, genrecog.c, gensupport.c, gensupport.h, ggc-callbacks.c, ggc-common.c, ggc-none.c, ggc-page.c, ggc-simple.c, ggc.h, global.c, graph.c, graph.h, gthr-aix.h, gthr-dce.h, gthr-posix.h, gthr-rtems.h, gthr-single.h, gthr-solaris.h, gthr-vxworks.h, gthr-win32.h, gthr.h, haifa-sched.c, halfpic.c, halfpic.h, hard-reg-set.h, hwint.h, ifcvt.c, input.h, insn-addr.h, integrate.c, integrate.h, jump.c, lcm.c, libgcc2.c, libgcc2.h, lists.c, local-alloc.c, loop.c, loop.h, machmode.def, machmode.h, main.c, mbchar.c, mbchar.h, mips-tdump.c, mips-tfile.c, mklibgcc.in, mkmap-flat.awk, mkmap-symver.awk, optabs.c, output.h, params.c, params.def, params.h, predict.c, predict.def, predict.h, prefix.c, prefix.h, print-rtl.c, print-tree.c, profile.c, protoize.c, read-rtl.c, real.c, real.h, recog.c, recog.h, reg-stack.c, regclass.c, regmove.c, regrename.c, regs.h, reload.c, reload.h, reload1.c, reorg.c, resource.c, resource.h, rtl.c, rtl.def, rtl.h, rtlanal.c, sbitmap.c, sbitmap.h, sched-deps.c, sched-ebb.c, sched-int.h, sched-rgn.c, sched-vis.c, sdbout.c, sdbout.h, sibcall.c, simplify-rtx.c, ssa-ccp.c, ssa-dce.c, ssa.c, ssa.h, stmt.c, stor-layout.c, stringpool.c, system.h, timevar.c, timevar.def, timevar.h, tlink.c, toplev.c, toplev.h, tree.c, tree.def, tree.h, tsystem.h, unroll.c, unwind-dw2-fde.c, unwind-dw2-fde.h, unwind-dw2.c, unwind-pe.h, unwind-sjlj.c, unwind.h, unwind.inc, varasm.c, varray.c, varray.h, xcoffout.c, xcoffout.h: replace "GNU CC" with "GCC". From-SVN: r45105
2001-08-22 16:35:51 +02:00
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
Makefile.in, [...]: replace "GNU CC" with "GCC". * Makefile.in, alias.c, basic-block.h, bb-reorder.c, bitmap.c, bitmap.h, builtin-types.def, builtins.c, builtins.def, c-aux-info.c, c-common.c, c-common.def, c-common.h, c-convert.c, c-decl.c, c-dump.c, c-dump.h, c-errors.c, c-format.c, c-lang.c, c-lex.c, c-lex.h, c-parse.in, c-pragma.c, c-pragma.h, c-semantics.c, c-tree.h, c-typeck.c, caller-save.c, calls.c, collect2.c, collect2.h, combine.c, conditions.h, config.gcc, configure.frag, configure.in, conflict.c, convert.c, convert.h, cppspec.c, crtstuff.c, cse.c, cselib.c, cselib.h, dbxout.c, dbxout.h, defaults.h, dependence.c, df.c, df.h, diagnostic.c, diagnostic.h, doloop.c, dominance.c, dwarf.h, dwarf2.h, dwarf2asm.c, dwarf2asm.h, dwarf2out.c, dwarf2out.h, dwarfout.c, emit-rtl.c, errors.c, errors.h, except.c, except.h, exgettext, explow.c, expmed.c, expr.c, expr.h, final.c, fixproto, flags.h, flow.c, fold-const.c, fp-test.c, function.c, function.h, gbl-ctors.h, gcc.c, gcc.h, gcc.hlp, gccspec.c, gcov-io.h, gcse.c, genattr.c, genattrtab.c, gencheck.c, gencodes.c, genconfig.c, genemit.c, genextract.c, genflags.c, gengenrtl.c, genmultilib, genopinit.c, genoutput.c, genpeep.c, genrecog.c, gensupport.c, gensupport.h, ggc-callbacks.c, ggc-common.c, ggc-none.c, ggc-page.c, ggc-simple.c, ggc.h, global.c, graph.c, graph.h, gthr-aix.h, gthr-dce.h, gthr-posix.h, gthr-rtems.h, gthr-single.h, gthr-solaris.h, gthr-vxworks.h, gthr-win32.h, gthr.h, haifa-sched.c, halfpic.c, halfpic.h, hard-reg-set.h, hwint.h, ifcvt.c, input.h, insn-addr.h, integrate.c, integrate.h, jump.c, lcm.c, libgcc2.c, libgcc2.h, lists.c, local-alloc.c, loop.c, loop.h, machmode.def, machmode.h, main.c, mbchar.c, mbchar.h, mips-tdump.c, mips-tfile.c, mklibgcc.in, mkmap-flat.awk, mkmap-symver.awk, optabs.c, output.h, params.c, params.def, params.h, predict.c, predict.def, predict.h, prefix.c, prefix.h, print-rtl.c, print-tree.c, profile.c, protoize.c, read-rtl.c, real.c, real.h, recog.c, recog.h, reg-stack.c, regclass.c, regmove.c, regrename.c, regs.h, reload.c, reload.h, reload1.c, reorg.c, resource.c, resource.h, rtl.c, rtl.def, rtl.h, rtlanal.c, sbitmap.c, sbitmap.h, sched-deps.c, sched-ebb.c, sched-int.h, sched-rgn.c, sched-vis.c, sdbout.c, sdbout.h, sibcall.c, simplify-rtx.c, ssa-ccp.c, ssa-dce.c, ssa.c, ssa.h, stmt.c, stor-layout.c, stringpool.c, system.h, timevar.c, timevar.def, timevar.h, tlink.c, toplev.c, toplev.h, tree.c, tree.def, tree.h, tsystem.h, unroll.c, unwind-dw2-fde.c, unwind-dw2-fde.h, unwind-dw2.c, unwind-pe.h, unwind-sjlj.c, unwind.h, unwind.inc, varasm.c, varray.c, varray.h, xcoffout.c, xcoffout.h: replace "GNU CC" with "GCC". From-SVN: r45105
2001-08-22 16:35:51 +02:00
GCC is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* This is derived from the C++ ABI for IA-64. Where we diverge
for cross-architecture compatibility are noted with "@@@". */
#ifndef _UNWIND_H
#define _UNWIND_H
#if defined (__SEH__) && !defined (__USING_SJLJ_EXCEPTIONS__)
/* Only for _GCC_specific_handler. */
#include <windows.h>
#endif
#ifndef HIDE_EXPORTS
#pragma GCC visibility push(default)
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* Level 1: Base ABI */
/* @@@ The IA-64 ABI uses uint64 throughout. Most places this is
inefficient for 32-bit and smaller machines. */
typedef unsigned _Unwind_Word __attribute__((__mode__(__unwind_word__)));
typedef signed _Unwind_Sword __attribute__((__mode__(__unwind_word__)));
#if defined(__ia64__) && defined(__hpux__)
typedef unsigned _Unwind_Ptr __attribute__((__mode__(__word__)));
#else
typedef unsigned _Unwind_Ptr __attribute__((__mode__(__pointer__)));
#endif
typedef unsigned _Unwind_Internal_Ptr __attribute__((__mode__(__pointer__)));
/* @@@ The IA-64 ABI uses a 64-bit word to identify the producer and
consumer of an exception. We'll go along with this for now even on
32-bit machines. We'll need to provide some other option for
16-bit machines and for machines with > 8 bits per byte. */
typedef unsigned _Unwind_Exception_Class __attribute__((__mode__(__DI__)));
/* The unwind interface uses reason codes in several contexts to
identify the reasons for failures or other actions. */
typedef enum
{
_URC_NO_REASON = 0,
_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
_URC_FATAL_PHASE2_ERROR = 2,
_URC_FATAL_PHASE1_ERROR = 3,
_URC_NORMAL_STOP = 4,
_URC_END_OF_STACK = 5,
_URC_HANDLER_FOUND = 6,
_URC_INSTALL_CONTEXT = 7,
_URC_CONTINUE_UNWIND = 8
} _Unwind_Reason_Code;
/* The unwind interface uses a pointer to an exception header object
as its representation of an exception being thrown. In general, the
full representation of an exception object is language- and
implementation-specific, but it will be prefixed by a header
understood by the unwind interface. */
struct _Unwind_Exception;
typedef void (*_Unwind_Exception_Cleanup_Fn) (_Unwind_Reason_Code,
struct _Unwind_Exception *);
struct _Unwind_Exception
{
_Unwind_Exception_Class exception_class;
_Unwind_Exception_Cleanup_Fn exception_cleanup;
#if !defined (__USING_SJLJ_EXCEPTIONS__) && defined (__SEH__)
_Unwind_Word private_[6];
#else
_Unwind_Word private_1;
_Unwind_Word private_2;
#endif
/* @@@ The IA-64 ABI says that this structure must be double-word aligned.
Taking that literally does not make much sense generically. Instead we
provide the maximum alignment required by any type for the machine. */
} __attribute__((__aligned__));
/* The ACTIONS argument to the personality routine is a bitwise OR of one
or more of the following constants. */
typedef int _Unwind_Action;
#define _UA_SEARCH_PHASE 1
#define _UA_CLEANUP_PHASE 2
#define _UA_HANDLER_FRAME 4
#define _UA_FORCE_UNWIND 8
#define _UA_END_OF_STACK 16
/* The target can override this macro to define any back-end-specific
attributes required for the lowest-level stack frame. */
#ifndef LIBGCC2_UNWIND_ATTRIBUTE
#define LIBGCC2_UNWIND_ATTRIBUTE
#endif
/* This is an opaque type used to refer to a system-specific data
structure used by the system unwinder. This context is created and
destroyed by the system, and passed to the personality routine
during unwinding. */
struct _Unwind_Context;
/* Raise an exception, passing along the given exception object. */
extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_RaiseException (struct _Unwind_Exception *);
/* Raise an exception for forced unwinding. */
typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)
(int, _Unwind_Action, _Unwind_Exception_Class,
struct _Unwind_Exception *, struct _Unwind_Context *, void *);
extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_ForcedUnwind (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *);
/* Helper to invoke the exception_cleanup routine. */
extern void _Unwind_DeleteException (struct _Unwind_Exception *);
/* Resume propagation of an existing exception. This is used after
e.g. executing cleanup code, and not to implement rethrowing. */
extern void LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_Resume (struct _Unwind_Exception *);
/* @@@ Resume propagation of a FORCE_UNWIND exception, or to rethrow
a normal exception that was handled. */
extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_Resume_or_Rethrow (struct _Unwind_Exception *);
/* @@@ Use unwind data to perform a stack backtrace. The trace callback
is called for every stack frame in the call chain, but no cleanup
actions are performed. */
typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)
(struct _Unwind_Context *, void *);
extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_Backtrace (_Unwind_Trace_Fn, void *);
/* These functions are used for communicating information about the unwind
context (i.e. the unwind descriptors and the user register state) between
the unwind library and the personality routine and landing pad. Only
selected registers may be manipulated. */
extern _Unwind_Word _Unwind_GetGR (struct _Unwind_Context *, int);
extern void _Unwind_SetGR (struct _Unwind_Context *, int, _Unwind_Word);
extern _Unwind_Ptr _Unwind_GetIP (struct _Unwind_Context *);
re PR other/26208 (Serious problem with unwinding through signal frames) PR other/26208 * unwind-dw2.c (struct _Unwind_Context): Add signal_frame field. (extract_cie_info): Handle S flag in augmentation string. (execute_cfa_program): If context->signal_frame, execute also fs->pc == context->ra instructions. (uw_frame_state_for): If context->signal_frame, don't subtract one from context->ra to find FDE. (uw_update_context_1): Set context->signal_frame to fs->signal_frame. (_Unwind_GetIPInfo): New function. * unwind-dw2.h (_Unwind_FrameState): Add signal_frame field. * unwind-c.c (PERSONALITY_FUNCTION): Use _Unwind_GetIPInfo instead of _Unwind_GetIP. * unwind-sjlj.c (_Unwind_GetIPInfo): New function. * unwind-generic.h (_Unwind_GetIPInfo): New prototype. * unwind-compat.c (_Unwind_GetIPInfo): New function. * libgcc-std.ver (_Unwind_GetIPInfo): Export @@GCC_4.2.0. * config/ia64/unwind-ia64.c (_Unwind_GetIPInfo): New function. * config/arm/unwind-arm.h (_Unwind_GetIPInfo): Define. * config/i386/linux-unwind.h (x86_fallback_frame_state, x86_64_fallback_frame_state): Set fs->signal_frame. * config/rs6000/linux-unwind.h (ppc_fallback_frame_state): Likewise. (MD_FROB_UPDATE_CONTEXT): Define unconditionally. (frob_update_context): Likewise. Workaround missing S flag in Linux 2.6.12 - 2.6.16 kernel vDSOs. * config/s390/linux-unwind.h (s390_fallback_frame_state): Likewise. Remove the psw_addr + 1 hack. libjava/ * exception.cc (PERSONALITY_FUNCTION): Use _Unwind_GetIPInfo instead of _Unwind_GetIP. * include/i386-signal.h (MAKE_THROW_FRAME): Change into empty macro. (HANDLE_DIVIDE_OVERFLOW): Don't adjust _res->eip if falling through to throw. * include/x86_64-signal.h (MAKE_THROW_FRAME): Change into empty macro. * include/powerpc-signal.h (MAKE_THROW_FRAME): Change into empty macro. libstdc++-v3/ * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Use _Unwind_GetIPInfo instead of _Unwind_GetIP. From-SVN: r111488
2006-02-27 18:26:26 +01:00
extern _Unwind_Ptr _Unwind_GetIPInfo (struct _Unwind_Context *, int *);
extern void _Unwind_SetIP (struct _Unwind_Context *, _Unwind_Ptr);
/* @@@ Retrieve the CFA of the given context. */
extern _Unwind_Word _Unwind_GetCFA (struct _Unwind_Context *);
extern void *_Unwind_GetLanguageSpecificData (struct _Unwind_Context *);
extern _Unwind_Ptr _Unwind_GetRegionStart (struct _Unwind_Context *);
/* The personality routine is the function in the C++ (or other language)
runtime library which serves as an interface between the system unwind
library and language-specific exception handling semantics. It is
specific to the code fragment described by an unwind info block, and
it is always referenced via the pointer in the unwind info block, and
hence it has no ABI-specified name.
Note that this implies that two different C++ implementations can
use different names, and have different contents in the language
specific data area. Moreover, that the language specific data
area contains no version info because name of the function invoked
provides more effective versioning by detecting at link time the
lack of code to handle the different data format. */
typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)
(int, _Unwind_Action, _Unwind_Exception_Class,
struct _Unwind_Exception *, struct _Unwind_Context *);
/* @@@ The following alternate entry points are for setjmp/longjmp
based unwinding. */
struct SjLj_Function_Context;
extern void _Unwind_SjLj_Register (struct SjLj_Function_Context *);
extern void _Unwind_SjLj_Unregister (struct SjLj_Function_Context *);
extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_SjLj_RaiseException (struct _Unwind_Exception *);
extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_SjLj_ForcedUnwind (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *);
extern void LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_SjLj_Resume (struct _Unwind_Exception *);
extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_SjLj_Resume_or_Rethrow (struct _Unwind_Exception *);
defaults.h (ASM_PREFERRED_EH_DATA_FORMAT): New. * defaults.h (ASM_PREFERRED_EH_DATA_FORMAT): New. * dwarf2asm.c (dw2_force_const_mem, dw2_output_indirect_constant_1, dw2_output_indirect_constants, dw2_asm_output_encoded_addr_rtx): New. * dwarf2asm.h (dw2_asm_output_encoded_addr_rtx): Prototype. (dw2_output_indirect_constants): Prototype. * dwarf2out.c (dwarf2out_begin_prologue): Generate current_function_func_begin_label if we'll need it for EH. Exit early for IA64_UNWIND_INFO. * except.c: Get DW_EH_PE_* defines from dwarf2.h. (eh_data_format_name): Update for indirect references. (output_function_exception_table): Care for IA64_UNWIND_INFO. Handle ASM_PREFERRED_EH_DATA_FORMAT. * except.h (MUST_USE_SJLJ_EXCEPTIONS): IA64_UNWIND_INFO needn't define HAVE_eh_return etc. * final.c (final_start_function): Always call dwarf2out_begin_prologue. (final_end_function): Don't call output_function_exception_table. * toplev.c (compile_file): Call dw2_output_indirect_constants. (rest_of_compilation): Invoke output_function_exception_table for ia64 before assemble_end_function. * tm.texi (ASM_PREFERRED_EH_DATA_FORMAT): Document. (ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX): Document. * unwind-dw2.c (_Unwind_GetTextRelBase, _Unwind_GetDataRelBase): New. * unwind.h: Declare them. * libgcc-std.ver: Export them. * unwind-pe.h: New file. * config/alpha/elf.h (ASM_PREFERRED_EH_DATA_FORMAT): New. * config/ia64/fde-glibc.c: Use "struct unw_table_entry" instead of "fde". (find_fde_for_dso): Extract DT_PLTGOT. (_Unwind_FindTableEntry): Rename from __ia64_find_fde; return the segment and gp as well. * config/ia64/frame-ia64.c: Remove file. * config/ia64/frame-ia64.h: Remove file. * config/ia64/unwind-ia64.c: New file. * config/ia64/unwind-ia64.h: New file. * config/ia64/ia64.h (ASM_OUTPUT_EH_CHAR): Remove. (ASM_OUTPUT_EH_SHORT, ASM_OUTPUT_EH_INT): Remove. (ASM_OUTPUT_EH_DOUBLE_INT): Remove. (ASM_PREFERRED_EH_DATA_FORMAT): New. (ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX): New. (IA64_UNWIND_INFO): Re-enable. (HANDLER_SECTION): Remove. (EH_RETURN_DATA_REGNO): New. * config/ia64/ia64.md (exception_receiver): Remove. * config/ia64/t-glibc (LIB2ADDEH): Re-enable. * config/ia64/t-ia64 (LIB2ADDEH): Re-enable. From-SVN: r41981
2001-05-12 08:03:20 +02:00
/* @@@ The following provide access to the base addresses for text
and data-relative addressing in the LDSA. In order to stay link
compatible with the standard ABI for IA-64, we inline these. */
#ifdef __ia64__
static inline _Unwind_Ptr
_Unwind_GetDataRelBase (struct _Unwind_Context *_C)
{
/* The GP is stored in R1. */
return _Unwind_GetGR (_C, 1);
}
static inline _Unwind_Ptr
_Unwind_GetTextRelBase (struct _Unwind_Context *_C __attribute__ ((__unused__)))
defaults.h (ASM_PREFERRED_EH_DATA_FORMAT): New. * defaults.h (ASM_PREFERRED_EH_DATA_FORMAT): New. * dwarf2asm.c (dw2_force_const_mem, dw2_output_indirect_constant_1, dw2_output_indirect_constants, dw2_asm_output_encoded_addr_rtx): New. * dwarf2asm.h (dw2_asm_output_encoded_addr_rtx): Prototype. (dw2_output_indirect_constants): Prototype. * dwarf2out.c (dwarf2out_begin_prologue): Generate current_function_func_begin_label if we'll need it for EH. Exit early for IA64_UNWIND_INFO. * except.c: Get DW_EH_PE_* defines from dwarf2.h. (eh_data_format_name): Update for indirect references. (output_function_exception_table): Care for IA64_UNWIND_INFO. Handle ASM_PREFERRED_EH_DATA_FORMAT. * except.h (MUST_USE_SJLJ_EXCEPTIONS): IA64_UNWIND_INFO needn't define HAVE_eh_return etc. * final.c (final_start_function): Always call dwarf2out_begin_prologue. (final_end_function): Don't call output_function_exception_table. * toplev.c (compile_file): Call dw2_output_indirect_constants. (rest_of_compilation): Invoke output_function_exception_table for ia64 before assemble_end_function. * tm.texi (ASM_PREFERRED_EH_DATA_FORMAT): Document. (ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX): Document. * unwind-dw2.c (_Unwind_GetTextRelBase, _Unwind_GetDataRelBase): New. * unwind.h: Declare them. * libgcc-std.ver: Export them. * unwind-pe.h: New file. * config/alpha/elf.h (ASM_PREFERRED_EH_DATA_FORMAT): New. * config/ia64/fde-glibc.c: Use "struct unw_table_entry" instead of "fde". (find_fde_for_dso): Extract DT_PLTGOT. (_Unwind_FindTableEntry): Rename from __ia64_find_fde; return the segment and gp as well. * config/ia64/frame-ia64.c: Remove file. * config/ia64/frame-ia64.h: Remove file. * config/ia64/unwind-ia64.c: New file. * config/ia64/unwind-ia64.h: New file. * config/ia64/ia64.h (ASM_OUTPUT_EH_CHAR): Remove. (ASM_OUTPUT_EH_SHORT, ASM_OUTPUT_EH_INT): Remove. (ASM_OUTPUT_EH_DOUBLE_INT): Remove. (ASM_PREFERRED_EH_DATA_FORMAT): New. (ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX): New. (IA64_UNWIND_INFO): Re-enable. (HANDLER_SECTION): Remove. (EH_RETURN_DATA_REGNO): New. * config/ia64/ia64.md (exception_receiver): Remove. * config/ia64/t-glibc (LIB2ADDEH): Re-enable. * config/ia64/t-ia64 (LIB2ADDEH): Re-enable. From-SVN: r41981
2001-05-12 08:03:20 +02:00
{
__builtin_abort ();
return 0;
defaults.h (ASM_PREFERRED_EH_DATA_FORMAT): New. * defaults.h (ASM_PREFERRED_EH_DATA_FORMAT): New. * dwarf2asm.c (dw2_force_const_mem, dw2_output_indirect_constant_1, dw2_output_indirect_constants, dw2_asm_output_encoded_addr_rtx): New. * dwarf2asm.h (dw2_asm_output_encoded_addr_rtx): Prototype. (dw2_output_indirect_constants): Prototype. * dwarf2out.c (dwarf2out_begin_prologue): Generate current_function_func_begin_label if we'll need it for EH. Exit early for IA64_UNWIND_INFO. * except.c: Get DW_EH_PE_* defines from dwarf2.h. (eh_data_format_name): Update for indirect references. (output_function_exception_table): Care for IA64_UNWIND_INFO. Handle ASM_PREFERRED_EH_DATA_FORMAT. * except.h (MUST_USE_SJLJ_EXCEPTIONS): IA64_UNWIND_INFO needn't define HAVE_eh_return etc. * final.c (final_start_function): Always call dwarf2out_begin_prologue. (final_end_function): Don't call output_function_exception_table. * toplev.c (compile_file): Call dw2_output_indirect_constants. (rest_of_compilation): Invoke output_function_exception_table for ia64 before assemble_end_function. * tm.texi (ASM_PREFERRED_EH_DATA_FORMAT): Document. (ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX): Document. * unwind-dw2.c (_Unwind_GetTextRelBase, _Unwind_GetDataRelBase): New. * unwind.h: Declare them. * libgcc-std.ver: Export them. * unwind-pe.h: New file. * config/alpha/elf.h (ASM_PREFERRED_EH_DATA_FORMAT): New. * config/ia64/fde-glibc.c: Use "struct unw_table_entry" instead of "fde". (find_fde_for_dso): Extract DT_PLTGOT. (_Unwind_FindTableEntry): Rename from __ia64_find_fde; return the segment and gp as well. * config/ia64/frame-ia64.c: Remove file. * config/ia64/frame-ia64.h: Remove file. * config/ia64/unwind-ia64.c: New file. * config/ia64/unwind-ia64.h: New file. * config/ia64/ia64.h (ASM_OUTPUT_EH_CHAR): Remove. (ASM_OUTPUT_EH_SHORT, ASM_OUTPUT_EH_INT): Remove. (ASM_OUTPUT_EH_DOUBLE_INT): Remove. (ASM_PREFERRED_EH_DATA_FORMAT): New. (ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX): New. (IA64_UNWIND_INFO): Re-enable. (HANDLER_SECTION): Remove. (EH_RETURN_DATA_REGNO): New. * config/ia64/ia64.md (exception_receiver): Remove. * config/ia64/t-glibc (LIB2ADDEH): Re-enable. * config/ia64/t-ia64 (LIB2ADDEH): Re-enable. From-SVN: r41981
2001-05-12 08:03:20 +02:00
}
/* @@@ Retrieve the Backing Store Pointer of the given context. */
extern _Unwind_Word _Unwind_GetBSP (struct _Unwind_Context *);
defaults.h (ASM_PREFERRED_EH_DATA_FORMAT): New. * defaults.h (ASM_PREFERRED_EH_DATA_FORMAT): New. * dwarf2asm.c (dw2_force_const_mem, dw2_output_indirect_constant_1, dw2_output_indirect_constants, dw2_asm_output_encoded_addr_rtx): New. * dwarf2asm.h (dw2_asm_output_encoded_addr_rtx): Prototype. (dw2_output_indirect_constants): Prototype. * dwarf2out.c (dwarf2out_begin_prologue): Generate current_function_func_begin_label if we'll need it for EH. Exit early for IA64_UNWIND_INFO. * except.c: Get DW_EH_PE_* defines from dwarf2.h. (eh_data_format_name): Update for indirect references. (output_function_exception_table): Care for IA64_UNWIND_INFO. Handle ASM_PREFERRED_EH_DATA_FORMAT. * except.h (MUST_USE_SJLJ_EXCEPTIONS): IA64_UNWIND_INFO needn't define HAVE_eh_return etc. * final.c (final_start_function): Always call dwarf2out_begin_prologue. (final_end_function): Don't call output_function_exception_table. * toplev.c (compile_file): Call dw2_output_indirect_constants. (rest_of_compilation): Invoke output_function_exception_table for ia64 before assemble_end_function. * tm.texi (ASM_PREFERRED_EH_DATA_FORMAT): Document. (ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX): Document. * unwind-dw2.c (_Unwind_GetTextRelBase, _Unwind_GetDataRelBase): New. * unwind.h: Declare them. * libgcc-std.ver: Export them. * unwind-pe.h: New file. * config/alpha/elf.h (ASM_PREFERRED_EH_DATA_FORMAT): New. * config/ia64/fde-glibc.c: Use "struct unw_table_entry" instead of "fde". (find_fde_for_dso): Extract DT_PLTGOT. (_Unwind_FindTableEntry): Rename from __ia64_find_fde; return the segment and gp as well. * config/ia64/frame-ia64.c: Remove file. * config/ia64/frame-ia64.h: Remove file. * config/ia64/unwind-ia64.c: New file. * config/ia64/unwind-ia64.h: New file. * config/ia64/ia64.h (ASM_OUTPUT_EH_CHAR): Remove. (ASM_OUTPUT_EH_SHORT, ASM_OUTPUT_EH_INT): Remove. (ASM_OUTPUT_EH_DOUBLE_INT): Remove. (ASM_PREFERRED_EH_DATA_FORMAT): New. (ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX): New. (IA64_UNWIND_INFO): Re-enable. (HANDLER_SECTION): Remove. (EH_RETURN_DATA_REGNO): New. * config/ia64/ia64.md (exception_receiver): Remove. * config/ia64/t-glibc (LIB2ADDEH): Re-enable. * config/ia64/t-ia64 (LIB2ADDEH): Re-enable. From-SVN: r41981
2001-05-12 08:03:20 +02:00
#else
extern _Unwind_Ptr _Unwind_GetDataRelBase (struct _Unwind_Context *);
extern _Unwind_Ptr _Unwind_GetTextRelBase (struct _Unwind_Context *);
#endif
/* @@@ Given an address, return the entry point of the function that
contains it. */
extern void * _Unwind_FindEnclosingFunction (void *pc);
#ifndef __SIZEOF_LONG__
#error "__SIZEOF_LONG__ macro not defined"
#endif
#ifndef __SIZEOF_POINTER__
#error "__SIZEOF_POINTER__ macro not defined"
#endif
/* leb128 type numbers have a potentially unlimited size.
The target of the following definitions of _sleb128_t and _uleb128_t
is to have efficient data types large enough to hold the leb128 type
numbers used in the unwind code.
Mostly these types will simply be defined to long and unsigned long
except when a unsigned long data type on the target machine is not
capable of storing a pointer. */
#if __SIZEOF_LONG__ >= __SIZEOF_POINTER__
typedef long _sleb128_t;
typedef unsigned long _uleb128_t;
#elif __SIZEOF_LONG_LONG__ >= __SIZEOF_POINTER__
typedef long long _sleb128_t;
typedef unsigned long long _uleb128_t;
#else
# error "What type shall we use for _sleb128_t?"
#endif
#if defined (__SEH__) && !defined (__USING_SJLJ_EXCEPTIONS__)
/* Handles the mapping from SEH to GCC interfaces. */
EXCEPTION_DISPOSITION _GCC_specific_handler (PEXCEPTION_RECORD, void *,
PCONTEXT, PDISPATCHER_CONTEXT,
_Unwind_Personality_Fn);
#endif
#ifdef __cplusplus
}
#endif
#ifndef HIDE_EXPORTS
#pragma GCC visibility pop
#endif
Add Intel CET support for EH in libgcc. Control-flow Enforcement Technology (CET), published by Intel, introduces the Shadow Stack feature, which ensures a return from a function is done to exactly the same location from where the function was called. When EH is present the control-flow transfer may skip some stack frames and the shadow stack has to be adjusted not to signal a violation of a control-flow transfer. It's done by counting a number of skiping frames and adjasting shadow stack pointer by this number. Having new semantic of the 'ret' instruction if CET is supported in HW the 'ret' instruction cannot be generated in ix86_expand_epilogue when we are returning after EH is processed. Added a code in ix86_expand_epilogue to adjust Shadow Stack pointer and to generate an indirect jump instead of 'ret'. As sp register is used during this adjustment thus the argument in pro_epilogue_adjust_stack is changed to update cfa_reg based on whether control-flow instrumentation is set. Without updating the cfa_reg field there is an assert later in dwarf2 pass related to mismatch the stack register and cfa_reg value. gcc/ * config/i386/i386.c (ix86_expand_epilogue): Change simple return to indirect jump for EH return if control-flow protection is enabled. Change explicit 'false' argument in pro_epilogue_adjust_stack with a value of flag_cf_protection. * config/i386/i386.md (simple_return_indirect_internal): Remove SImode restriction to support 64-bit. libgcc/ * config/i386/linux-unwind.h: Include config/i386/shadow-stack-unwind.h. * config/i386/shadow-stack-unwind.h: New file. * unwind-dw2.c: (uw_install_context): Add a frame parameter and pass it to _Unwind_Frames_Extra. * unwind-generic.h (_Unwind_Frames_Extra): New. * unwind.inc (_Unwind_RaiseException_Phase2): Add frames_p parameter. Add local variable frames to count number of frames. (_Unwind_ForcedUnwind_Phase2): Likewise. (_Unwind_RaiseException): Add local variable frames to count number of frames, pass it to _Unwind_RaiseException_Phase2 and uw_install_context. (_Unwind_ForcedUnwind): Likewise. (_Unwind_Resume): Likewise. (_Unwind_Resume_or_Rethrow): Likewise. From-SVN: r254876
2017-11-17 16:21:23 +01:00
/* Additional actions to unwind number of stack frames. */
#define _Unwind_Frames_Extra(frames)
/* Increment frame count. */
#define _Unwind_Frames_Increment(context, frames) frames++
#endif /* unwind.h */