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729772149f
aarch64 defines a huge __reserved field in sigcontext. Cut it down to only the used FP fields. unw_cursor_t can also be cut down a bit, while still maintaining some reserved space.
234 lines
6.1 KiB
C
234 lines
6.1 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2001-2004 Hewlett-Packard Co
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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Copyright (C) 2013 Linaro Limited
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#ifndef LIBUNWIND_H
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#define LIBUNWIND_H
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#if defined(__cplusplus) || defined(c_plusplus)
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extern "C" {
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#endif
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#include <inttypes.h>
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#include <stddef.h>
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#include <ucontext.h>
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#define UNW_TARGET aarch64
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#define UNW_TARGET_AARCH64 1
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#define _U_TDEP_QP_TRUE 0 /* see libunwind-dynamic.h */
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/* This needs to be big enough to accommodate "struct cursor", while
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leaving some slack for future expansion. Changing this value will
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require recompiling all users of this library. Stack allocation is
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relatively cheap and unwind-state copying is relatively rare, so we
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want to err on making it rather too big than too small.
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Calculation is regs used (64 + 34) * 2 + 40 (bytes of rest of
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cursor) + padding
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*/
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#define UNW_TDEP_CURSOR_LEN 250
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typedef uint64_t unw_word_t;
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typedef int64_t unw_sword_t;
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typedef long double unw_tdep_fpreg_t;
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typedef struct
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{
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/* no aarch64-specific auxiliary proc-info */
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}
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unw_tdep_proc_info_t;
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typedef enum
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{
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/* 64-bit general registers. */
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UNW_AARCH64_X0,
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UNW_AARCH64_X1,
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UNW_AARCH64_X2,
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UNW_AARCH64_X3,
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UNW_AARCH64_X4,
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UNW_AARCH64_X5,
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UNW_AARCH64_X6,
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UNW_AARCH64_X7,
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UNW_AARCH64_X8,
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/* Temporary registers. */
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UNW_AARCH64_X9,
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UNW_AARCH64_X10,
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UNW_AARCH64_X11,
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UNW_AARCH64_X12,
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UNW_AARCH64_X13,
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UNW_AARCH64_X14,
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UNW_AARCH64_X15,
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/* Intra-procedure-call temporary registers. */
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UNW_AARCH64_X16,
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UNW_AARCH64_X17,
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/* Callee-saved registers. */
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UNW_AARCH64_X18,
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UNW_AARCH64_X19,
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UNW_AARCH64_X20,
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UNW_AARCH64_X21,
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UNW_AARCH64_X22,
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UNW_AARCH64_X23,
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UNW_AARCH64_X24,
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UNW_AARCH64_X25,
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UNW_AARCH64_X26,
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UNW_AARCH64_X27,
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UNW_AARCH64_X28,
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/* 64-bit frame pointer. */
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UNW_AARCH64_X29,
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/* 64-bit link register. */
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UNW_AARCH64_X30,
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/* 64-bit stack pointer. */
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UNW_AARCH64_SP = 31,
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UNW_AARCH64_PC,
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UNW_AARCH64_PSTATE,
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/* 128-bit FP/Advanced SIMD registers. */
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UNW_AARCH64_V0 = 64,
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UNW_AARCH64_V1,
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UNW_AARCH64_V2,
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UNW_AARCH64_V3,
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UNW_AARCH64_V4,
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UNW_AARCH64_V5,
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UNW_AARCH64_V6,
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UNW_AARCH64_V7,
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UNW_AARCH64_V8,
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UNW_AARCH64_V9,
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UNW_AARCH64_V10,
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UNW_AARCH64_V11,
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UNW_AARCH64_V12,
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UNW_AARCH64_V13,
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UNW_AARCH64_V14,
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UNW_AARCH64_V15,
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UNW_AARCH64_V16,
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UNW_AARCH64_V17,
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UNW_AARCH64_V18,
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UNW_AARCH64_V19,
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UNW_AARCH64_V20,
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UNW_AARCH64_V21,
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UNW_AARCH64_V22,
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UNW_AARCH64_V23,
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UNW_AARCH64_V24,
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UNW_AARCH64_V25,
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UNW_AARCH64_V26,
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UNW_AARCH64_V27,
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UNW_AARCH64_V28,
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UNW_AARCH64_V29,
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UNW_AARCH64_V30,
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UNW_AARCH64_V31,
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UNW_AARCH64_FPSR,
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UNW_AARCH64_FPCR,
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/* For AArch64, the CFA is the value of SP (x31) at the call site of the
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previous frame. */
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UNW_AARCH64_CFA = UNW_AARCH64_SP,
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UNW_TDEP_LAST_REG = UNW_AARCH64_FPCR,
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UNW_TDEP_IP = UNW_AARCH64_X30,
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UNW_TDEP_SP = UNW_AARCH64_SP,
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UNW_TDEP_EH = UNW_AARCH64_X0,
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}
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aarch64_regnum_t;
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/* Use R0 through R3 to pass exception handling information. */
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#define UNW_TDEP_NUM_EH_REGS 4
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typedef struct unw_tdep_save_loc
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{
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/* Additional target-dependent info on a save location. */
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}
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unw_tdep_save_loc_t;
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/* On AArch64, we can directly use ucontext_t as the unwind context,
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* however, the __reserved struct is quite large: tune it down to only
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* the necessary used fields. */
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struct unw_sigcontext
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{
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uint64_t fault_address;
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uint64_t regs[31];
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uint64_t sp;
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uint64_t pc;
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uint64_t pstate;
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uint8_t __reserved[(34 * 8)] __attribute__((__aligned__(16)));
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};
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typedef struct
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{
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unsigned long uc_flags;
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struct ucontext *uc_link;
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stack_t uc_stack;
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__sigset_t uc_sigmask;
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struct unw_sigcontext uc_mcontext;
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} unw_tdep_context_t;
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#include "libunwind-common.h"
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#include "libunwind-dynamic.h"
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#define unw_tdep_getcontext(uc) (({ \
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unw_tdep_context_t *unw_ctx = (uc); \
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register uint64_t *unw_base asm ("x0") = (uint64_t*) unw_ctx->uc_mcontext.regs; \
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__asm__ __volatile__ ( \
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"stp x0, x1, [%[base], #0]\n" \
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"stp x2, x3, [%[base], #16]\n" \
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"stp x4, x5, [%[base], #32]\n" \
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"stp x6, x7, [%[base], #48]\n" \
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"stp x8, x9, [%[base], #64]\n" \
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"stp x10, x11, [%[base], #80]\n" \
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"stp x12, x13, [%[base], #96]\n" \
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"stp x14, x13, [%[base], #112]\n" \
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"stp x16, x17, [%[base], #128]\n" \
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"stp x18, x19, [%[base], #144]\n" \
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"stp x20, x21, [%[base], #160]\n" \
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"stp x22, x23, [%[base], #176]\n" \
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"stp x24, x25, [%[base], #192]\n" \
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"stp x26, x27, [%[base], #208]\n" \
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"stp x28, x29, [%[base], #224]\n" \
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"str x30, [%[base], #240]\n" \
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"mov x1, sp\n" \
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"stp x1, x30, [%[base], #248]\n" \
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: [base] "+r" (unw_base) : : "x1", "memory"); \
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}), 0)
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#define unw_tdep_is_fpreg UNW_ARCH_OBJ(is_fpreg)
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extern int unw_tdep_is_fpreg (int);
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#if defined(__cplusplus) || defined(c_plusplus)
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}
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#endif
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#endif /* LIBUNWIND_H */
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