Clean up the arm64 setjmp.
Note that this doesn't address the fact that we don't save/restore the real-time signals. But it does let us pass the tests we currently fail. Bug: 16918359 Change-Id: I063a6926164289a71026a412da7f5dd2ca9a74b3
This commit is contained in:
Elliott Hughes
parent
2421406711
commit
9fb536de97
@ -77,7 +77,7 @@ ENTRY(_longjmp)
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ldr r2, .L_setjmp_magic
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ldr r3, [r0, #(_JB_MAGIC * 4)]
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teq r2, r3
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bne botch
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blne longjmperror
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/* Restore floating-point registers */
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add r2, r0, #(_JB_FLOAT_BASE * 4)
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@ -93,17 +93,11 @@ ENTRY(_longjmp)
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/* Validate sp and r14 */
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teq sp, #0
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teqne r14, #0
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beq botch
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bleq longjmperror
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/* Set return value */
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mov r0, r1
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teq r0, #0x00000000
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moveq r0, #0x00000001
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bx lr
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/* validation failed, die die die. */
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botch:
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bl longjmperror
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bl abort
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b . - 8 /* Cannot get here */
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END(_longjmp)
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@ -91,7 +91,7 @@ ENTRY(longjmp)
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ldr r2, .Lsetjmp_magic
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ldr r3, [r0, #(_JB_MAGIC * 4)]
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teq r2, r3
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bne botch
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blne longjmperror
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/* Fetch signal mask */
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ldr r2, [r0, #(_JB_SIGMASK * 4)]
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@ -127,19 +127,12 @@ ENTRY(longjmp)
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/* Validate sp and r14 */
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teq sp, #0
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teqne r14, #0
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beq botch
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bleq longjmperror
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/* Set return value */
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mov r0, r1
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teq r0, #0x00000000
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moveq r0, #0x00000001
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bx lr
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mov r15, r14
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/* validation failed, die die die. */
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botch:
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bl longjmperror
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bl abort
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b . - 8 /* Cannot get here */
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END(longjmp)
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@ -35,10 +35,8 @@ libc_openbsd_src_files_arm64 += \
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libc_bionic_src_files_arm64 += \
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arch-arm64/bionic/__bionic_clone.S \
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arch-arm64/bionic/_exit_with_stack_teardown.S \
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arch-arm64/bionic/_setjmp.S \
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arch-arm64/bionic/setjmp.S \
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arch-arm64/bionic/__set_tls.c \
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arch-arm64/bionic/sigsetjmp.S \
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arch-arm64/bionic/syscall.S \
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arch-arm64/bionic/vfork.S \
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@ -1,111 +0,0 @@
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/*
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* Copyright (C) 2013 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <private/bionic_asm.h>
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#include <machine/setjmp.h>
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/*
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* C library - _setjmp, _longjmp
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*
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* _longjmp(jmp_buf state, int value)
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* will generate a "return(v)" from the last call to _setjmp(state) by restoring
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* registers from the stack. The previous signal state is NOT restored.
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*
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* NOTE: x0 return value
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* x9-x15 temporary registers
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*/
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ENTRY(_setjmp)
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/* store magic number */
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ldr w9, .L_setjmp_magic
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str w9, [x0, #(_JB_MAGIC * 4)]
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/* store core registers */
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mov x10, sp
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stp x30, x10, [x0, #(_JB_CORE_BASE * 4 + 16 * 0)]
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stp x28, x29, [x0, #(_JB_CORE_BASE * 4 + 16 * 1)]
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stp x26, x27, [x0, #(_JB_CORE_BASE * 4 + 16 * 2)]
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stp x24, x25, [x0, #(_JB_CORE_BASE * 4 + 16 * 3)]
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stp x22, x23, [x0, #(_JB_CORE_BASE * 4 + 16 * 4)]
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stp x20, x21, [x0, #(_JB_CORE_BASE * 4 + 16 * 5)]
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str x19, [x0, #(_JB_CORE_BASE * 4 + 16 * 6)]
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/* store floating point registers */
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stp d14, d15, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 0)]
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stp d12, d13, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 1)]
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stp d10, d11, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 2)]
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stp d8, d9, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 3)]
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mov w0, wzr
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ret
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END(_setjmp)
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.L_setjmp_magic:
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.word _JB_MAGIC__SETJMP
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ENTRY(_longjmp)
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/* check magic */
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ldr w9, .L_setjmp_magic
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ldr w10, [x0, #(_JB_MAGIC * 4)]
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cmp w9, w10
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b.ne .L_fail
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/* restore core registers */
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ldp x30, x10, [x0, #(_JB_CORE_BASE * 4 + 16 * 0)]
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mov sp, x10
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ldp x28, x29, [x0, #(_JB_CORE_BASE * 4 + 16 * 1)]
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ldp x26, x27, [x0, #(_JB_CORE_BASE * 4 + 16 * 2)]
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ldp x24, x25, [x0, #(_JB_CORE_BASE * 4 + 16 * 3)]
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ldp x22, x23, [x0, #(_JB_CORE_BASE * 4 + 16 * 4)]
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ldp x20, x21, [x0, #(_JB_CORE_BASE * 4 + 16 * 5)]
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ldr x19, [x0, #(_JB_CORE_BASE * 4 + 16 * 6)]
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/* restore floating point registers */
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ldp d14, d15, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 0)]
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ldp d12, d13, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 1)]
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ldp d10, d11, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 2)]
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ldp d8, d9, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 3)]
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/* validate sp (sp mod 16 = 0) and lr (lr mod 4 = 0) */
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tst x30, #3
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b.ne .L_fail
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mov x10, sp
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tst x10, #15
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b.ne .L_fail
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/* set return value */
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cmp w1, wzr
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csinc w0, w1, wzr, ne
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ret
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/* validation failed, die die die */
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.L_fail:
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bl longjmperror
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bl abort
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b . - 8 /* Cannot get here */
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END(_longjmp)
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@ -27,97 +27,151 @@
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*/
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#include <private/bionic_asm.h>
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#include <machine/setjmp.h>
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/*
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* C library - _setjmp, _longjmp
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*
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* _longjmp(jmp_buf state, int value)
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* will generate a "return(v)" from the last call to _setjmp(state) by restoring
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* registers from the stack. The previous signal state is NOT restored.
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*
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* NOTE: x0 return value
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* x9-x15 temporary registers
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*/
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// _JBLEN is the size of a jmp_buf in longs(64bit on AArch64).
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#define _JBLEN 32
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// According to AARCH64 PCS document we need to save the following
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// registers:
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//
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// Core x19 - x30, sp (see section 5.1.1)
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// VFP d8 - d15 (see section 5.1.2)
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//
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// NOTE: All the registers saved here will have 64bit vales (except FPSR).
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// AAPCS mandates that the higher part of q registers do not need to
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// be saved by the callee.
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//
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// The structure of jmp_buf for AArch64:
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//
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// NOTE: _JBLEN is the size of jmp_buf in longs(64bit on AArch64)! The table
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// below computes the offsets in words(32bit).
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//
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// word name description
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// 0 magic magic number
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// 1 sigmask signal mask (not used with _setjmp / _longjmp)
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// 2 core_base base of core registers (x19-x30, sp)
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// 28 float_base base of float registers (d8-d15)
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// 44 reserved reserved entries (room to grow)
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// 64
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//
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//
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// NOTE: The instructions that load/store core/vfp registers expect 8-byte
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// alignment. Contrary to the previous setjmp header for ARM we do not
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// need to save status/control registers for VFP (it is not a
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// requirement for setjmp).
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//
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#define _JB_MAGIC 0
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#define _JB_SIGMASK (_JB_MAGIC+1)
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#define _JB_CORE_BASE (_JB_SIGMASK+1)
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#define _JB_FLOAT_BASE (_JB_CORE_BASE + (31-19+1)*2)
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.L_setjmp_magic_signal_mask_n: .word 0x53657200
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.L_setjmp_magic_signal_mask_y: .word 0x53657201
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ENTRY(setjmp)
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/* block all signals an retrieve signal mask */
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stp x0, x30, [sp, #-16]!
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mov x0, xzr
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bl sigblock
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mov w1, w0
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ldp x0, x30, [sp], #16
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/* store signal mask */
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str w1, [x0, #(_JB_SIGMASK *4)]
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/* store magic number */
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ldr w9, .L_setjmp_magic
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str w9, [x0, #(_JB_MAGIC * 4)]
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/* store core registers */
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mov x10, sp
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stp x30, x10, [x0, #(_JB_CORE_BASE * 4 + 16 * 0)]
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stp x28, x29, [x0, #(_JB_CORE_BASE * 4 + 16 * 1)]
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stp x26, x27, [x0, #(_JB_CORE_BASE * 4 + 16 * 2)]
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stp x24, x25, [x0, #(_JB_CORE_BASE * 4 + 16 * 3)]
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stp x22, x23, [x0, #(_JB_CORE_BASE * 4 + 16 * 4)]
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stp x20, x21, [x0, #(_JB_CORE_BASE * 4 + 16 * 5)]
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str x19, [x0, #(_JB_CORE_BASE * 4 + 16 * 6)]
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/* store floating point registers */
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stp d14, d15, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 0)]
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stp d12, d13, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 1)]
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stp d10, d11, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 2)]
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stp d8, d9, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 3)]
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mov w0, wzr
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ret
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mov w1, #1
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b sigsetjmp
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END(setjmp)
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.L_setjmp_magic:
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.word _JB_MAGIC__SETJMP
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ENTRY(_setjmp)
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mov w1, #0
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b sigsetjmp
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END(_setjmp)
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ENTRY(longjmp)
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/* check magic */
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ldr w9, .L_setjmp_magic
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ldr w10, [x0, #(_JB_MAGIC * 4)]
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cmp w9, w10
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b.ne .L_fail
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// int sigsetjmp(sigjmp_buf env, int save_signal_mask);
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ENTRY(sigsetjmp)
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// Do we need to save the signal mask?
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ldr w9, .L_setjmp_magic_signal_mask_n
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cbz w1, 1f
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/* restore core registers */
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ldp x30, x10, [x0, #(_JB_CORE_BASE * 4 + 16 * 0)]
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mov sp, x10
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ldp x28, x29, [x0, #(_JB_CORE_BASE * 4 + 16 * 1)]
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ldp x26, x27, [x0, #(_JB_CORE_BASE * 4 + 16 * 2)]
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ldp x24, x25, [x0, #(_JB_CORE_BASE * 4 + 16 * 3)]
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ldp x22, x23, [x0, #(_JB_CORE_BASE * 4 + 16 * 4)]
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ldp x20, x21, [x0, #(_JB_CORE_BASE * 4 + 16 * 5)]
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ldr x19, [x0, #(_JB_CORE_BASE * 4 + 16 * 6)]
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// Get current signal mask.
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stp x0, x30, [sp, #-16]!
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mov x0, xzr
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bl sigblock
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mov w1, w0
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ldp x0, x30, [sp], #16
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/* restore floating point registers */
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ldp d14, d15, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 0)]
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ldp d12, d13, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 1)]
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ldp d10, d11, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 2)]
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ldp d8, d9, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 3)]
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// Save signal mask.
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str w1, [x0, #(_JB_SIGMASK * 4)]
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/* validate sp (sp mod 16 = 0) and lr (lr mod 4 = 0) */
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tst x30, #3
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b.ne .L_fail
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mov x10, sp
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tst x10, #15
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b.ne .L_fail
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ldr w9, .L_setjmp_magic_signal_mask_y
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/* set return value */
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cmp w1, wzr
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csinc w0, w1, wzr, ne
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ret
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1:
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// Save magic number.
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str w9, [x0, #(_JB_MAGIC * 4)]
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/* validation failed, die die die */
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.L_fail:
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bl longjmperror
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bl abort
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b . - 8 /* Cannot get here */
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END(longjmp)
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// Save core registers.
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mov x10, sp
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stp x30, x10, [x0, #(_JB_CORE_BASE * 4 + 16 * 0)]
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stp x28, x29, [x0, #(_JB_CORE_BASE * 4 + 16 * 1)]
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stp x26, x27, [x0, #(_JB_CORE_BASE * 4 + 16 * 2)]
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stp x24, x25, [x0, #(_JB_CORE_BASE * 4 + 16 * 3)]
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stp x22, x23, [x0, #(_JB_CORE_BASE * 4 + 16 * 4)]
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stp x20, x21, [x0, #(_JB_CORE_BASE * 4 + 16 * 5)]
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str x19, [x0, #(_JB_CORE_BASE * 4 + 16 * 6)]
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// Save floating point registers.
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stp d14, d15, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 0)]
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stp d12, d13, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 1)]
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stp d10, d11, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 2)]
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stp d8, d9, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 3)]
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mov w0, wzr
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ret
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END(sigsetjmp)
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// void siglongjmp(sigjmp_buf env, int value);
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ENTRY(siglongjmp)
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// Check magic.
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ldr w10, [x0, #(_JB_MAGIC * 4)]
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ldr w9, .L_setjmp_magic_signal_mask_n
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cmp w9, w10
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b.eq 1f
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ldr w9, .L_setjmp_magic_signal_mask_y
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cmp w9, w10
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b.ne longjmperror
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// Restore signal mask.
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stp x0, x30, [sp, #-16]!
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mov x19, x1
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ldr w0, [x0, #(_JB_SIGMASK * 4)]
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bl sigsetmask
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ldp x0, x30, [sp], #16
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mov x1, x19
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1:
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// Restore core registers.
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ldp x30, x10, [x0, #(_JB_CORE_BASE * 4 + 16 * 0)]
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mov sp, x10
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ldp x28, x29, [x0, #(_JB_CORE_BASE * 4 + 16 * 1)]
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ldp x26, x27, [x0, #(_JB_CORE_BASE * 4 + 16 * 2)]
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ldp x24, x25, [x0, #(_JB_CORE_BASE * 4 + 16 * 3)]
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ldp x22, x23, [x0, #(_JB_CORE_BASE * 4 + 16 * 4)]
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ldp x20, x21, [x0, #(_JB_CORE_BASE * 4 + 16 * 5)]
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ldr x19, [x0, #(_JB_CORE_BASE * 4 + 16 * 6)]
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// Restore floating point registers.
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ldp d14, d15, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 0)]
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ldp d12, d13, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 1)]
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ldp d10, d11, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 2)]
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ldp d8, d9, [x0, #(_JB_FLOAT_BASE * 4 + 16 * 3)]
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// Validate sp (sp mod 16 = 0) and lr (lr mod 4 = 0).
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tst x30, #3
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b.ne longjmperror
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mov x10, sp
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tst x10, #15
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b.ne longjmperror
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// Set return value.
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cmp w1, wzr
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csinc w0, w1, wzr, ne
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ret
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END(siglongjmp)
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.globl longjmp
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.equ longjmp, siglongjmp
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.globl _longjmp
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.equ _longjmp, siglongjmp
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@ -1,51 +0,0 @@
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/*
|
||||
* Copyright (C) 2013 The Android Open Source Project
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* * Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
||||
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <private/bionic_asm.h>
|
||||
#include <machine/setjmp.h>
|
||||
|
||||
/*
|
||||
* int sigsetjmp(sigjmp_buf env, int savesigs);
|
||||
* void siglongjmp(sigjmp_buf env, int val);
|
||||
*/
|
||||
|
||||
ENTRY(sigsetjmp)
|
||||
cbz w1, _setjmp
|
||||
b setjmp
|
||||
END(sigsetjmp)
|
||||
|
||||
.L_setjmp_magic:
|
||||
.word _JB_MAGIC__SETJMP
|
||||
|
||||
ENTRY(siglongjmp)
|
||||
ldr w2, .L_setjmp_magic
|
||||
ldr w3, [x0]
|
||||
cmp w2, w3
|
||||
b.eq _longjmp
|
||||
b longjmp
|
||||
END(siglongjmp)
|
||||
@ -26,48 +26,5 @@
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
/*
|
||||
* machine/setjmp.h: machine dependent setjmp-related information.
|
||||
*/
|
||||
|
||||
/* _JBLEN is the size of a jmp_buf in longs(64bit on AArch64) */
|
||||
/* _JBLEN is the size of a jmp_buf in longs (64bit on AArch64) */
|
||||
#define _JBLEN 32
|
||||
|
||||
/* According to AARCH64 PCS document we need to save the following
|
||||
* registers:
|
||||
*
|
||||
* Core x19 - x30, sp (see section 5.1.1)
|
||||
* VFP d8 - d15 (see section 5.1.2)
|
||||
*
|
||||
* NOTE: All the registers saved here will have 64bit vales (except FPSR).
|
||||
* AAPCS mandates that the higher part of q registers does not need to
|
||||
* be saveved by the callee.
|
||||
*/
|
||||
|
||||
/* The structure of jmp_buf for AArch64:
|
||||
*
|
||||
* NOTE: _JBLEN is the size of jmp_buf in longs(64bit on AArch64)! The table
|
||||
* below computes the offsets in words(32bit).
|
||||
*
|
||||
* word name description
|
||||
* 0 magic magic number
|
||||
* 1 sigmask signal mask (not used with _setjmp / _longjmp)
|
||||
* 2 core_base base of core registers (x19-x30, sp)
|
||||
* 28 float_base base of float registers (d8-d15)
|
||||
* 44 reserved reserved entries (room to grow)
|
||||
* 64
|
||||
*
|
||||
*
|
||||
* NOTE: The instructions that load/store core/vfp registers expect 8-byte
|
||||
* alignment. Contrary to the previous setjmp header for ARM we do not
|
||||
* need to save status/control registers for VFP (it is not a
|
||||
* requirement for setjmp).
|
||||
*/
|
||||
|
||||
#define _JB_MAGIC 0
|
||||
#define _JB_SIGMASK (_JB_MAGIC+1)
|
||||
#define _JB_CORE_BASE (_JB_SIGMASK+1)
|
||||
#define _JB_FLOAT_BASE (_JB_CORE_BASE + (31-19+1)*2)
|
||||
|
||||
#define _JB_MAGIC__SETJMP 0x53657200
|
||||
#define _JB_MAGIC_SETJMP 0x53657201
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user