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ARM: Consolidate with generic unwinder wrapper code
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Roland McGrath
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Jan 5, 2015
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| /* _Unwind_Resume wrapper for ARM EABI. | ||
| Copyright (C) 2015 Free Software Foundation, Inc. | ||
| This file is part of the GNU C Library. | ||
| The GNU C Library is free software; you can redistribute it and/or | ||
| modify it under the terms of the GNU Lesser General Public License as | ||
| published by the Free Software Foundation; either version 2.1 of the | ||
| License, or (at your option) any later version. | ||
| The GNU C Library 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 | ||
| Lesser General Public License for more details. | ||
| You should have received a copy of the GNU Lesser General Public | ||
| License along with the GNU C Library. If not, see | ||
| <http://www.gnu.org/licenses/>. */ | ||
|
|
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| #include <sysdep.h> | ||
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| /* This is just implementing exactly what the C version does. | ||
| We do it in assembly just to ensure that we get an unmolested tail | ||
| call to the libgcc function, which is necessary for the ARM unwinder. */ | ||
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|
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| ENTRY (_Unwind_Resume) | ||
| LDR_HIDDEN (ip, ip, __libgcc_s_resume, 0) | ||
| cmp ip, #0 | ||
| beq 1f | ||
| 0: PTR_DEMANGLE (ip, ip, r2, r3) | ||
| bx ip | ||
|
|
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| /* We need to save and restore LR (for our own return address) | ||
| and R0 (for the argument to _Unwind_Resume) around the call. */ | ||
| 1: push {r0, lr} | ||
| cfi_adjust_cfa_offset (8) | ||
| cfi_rel_offset (r0, 0) | ||
| cfi_rel_offset (lr, 4) | ||
| bl __libgcc_s_init | ||
| pop {r0, lr} | ||
| cfi_adjust_cfa_offset (-8) | ||
| cfi_restore (r0) | ||
| cfi_restore (lr) | ||
|
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| LDR_HIDDEN (ip, ip, __libgcc_s_resume, 0) | ||
| b 0b | ||
| END (_Unwind_Resume) |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,2 @@ | ||
| #define __libgcc_s_init pthread_cancel_init | ||
| #include <arm-unwind-resume.S> |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1 @@ | ||
| #include <arm-unwind-resume.S> |
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| Original file line number | Diff line number | Diff line change |
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| /* Definitions for unwind-resume.c. ARM (EABI) version. | ||
| Copyright (C) 2014 Free Software Foundation, Inc. | ||
| This file is part of the GNU C Library. | ||
| The GNU C Library is free software; you can redistribute it and/or | ||
| modify it under the terms of the GNU Lesser General Public License as | ||
| published by the Free Software Foundation; either version 2.1 of the | ||
| License, or (at your option) any later version. | ||
| The GNU C Library 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 | ||
| Lesser General Public License for more details. | ||
| You should have received a copy of the GNU Lesser General Public | ||
| License along with the GNU C Library; see the file COPYING.LIB. If | ||
| not, see <http://www.gnu.org/licenses/>. */ | ||
|
|
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| /* The EABI personality routine has a different signature than the | ||
| canonical one. These macros tell sysdeps/gnu/unwind*.c how to | ||
| define __gcc_personality_v0. */ | ||
| #define PERSONALITY_PROTO \ | ||
| (_Unwind_State state, \ | ||
| struct _Unwind_Exception *ue_header, \ | ||
| struct _Unwind_Context *context) | ||
| #define PERSONALITY_ARGS \ | ||
| (state, ue_header, context) | ||
|
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| /* It's vitally important that _Unwind_Resume not have a stack frame; the | ||
| ARM unwinder relies on register state at entrance. So we write this in | ||
| assembly (see arm-unwind-resume.S). This macro tells the generic code | ||
| not to provide the generic C definition. */ | ||
| #define HAVE_ARCH_UNWIND_RESUME 1 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| /* Definitions for unwind-resume.c. Generic version. | ||
| Copyright (C) 2015 Free Software Foundation, Inc. | ||
| This file is part of the GNU C Library. | ||
| The GNU C Library is free software; you can redistribute it and/or | ||
| modify it under the terms of the GNU Lesser General Public License as | ||
| published by the Free Software Foundation; either version 2.1 of the | ||
| License, or (at your option) any later version. | ||
| The GNU C Library 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 | ||
| Lesser General Public License for more details. | ||
| You should have received a copy of the GNU Lesser General Public | ||
| License along with the GNU C Library; see the file COPYING.LIB. If | ||
| not, see <http://www.gnu.org/licenses/>. */ | ||
|
|
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| /* These describe the arguments to unwinder personality functions, | ||
| specifically __gcc_personality_v0. A machine-specific sysdeps | ||
| file might define them differently. */ | ||
| #define PERSONALITY_PROTO \ | ||
| (int version, _Unwind_Action actions, \ | ||
| _Unwind_Exception_Class exception_class, \ | ||
| struct _Unwind_Exception *ue_header, \ | ||
| struct _Unwind_Context *context) | ||
| #define PERSONALITY_ARGS \ | ||
| (version, actions, exception_class, ue_header, context) | ||
|
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| /* This is defined nonzero by a machine-specific sysdeps file if | ||
| _Unwind_Resume is provided separately and thus the generic C | ||
| version should not be defined. */ | ||
| #define HAVE_ARCH_UNWIND_RESUME 0 |
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