libs/x86_64:Add the setjmp/longjmp function
Signed-off-by: liwenxiang1 <liwenxiang1@xiaomi.com>
This commit is contained in:
liwenxiang1
Xiang Xiao
parent
3271142b87
commit
4c19e75ff5
5 changed files with 233 additions and 0 deletions
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@ -144,6 +144,7 @@ config ARCH_X86_64
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select ARCH_TOOLCHAIN_GNU
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select ARCH_HAVE_BACKTRACE
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select ARCH_HAVE_FORK
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select ARCH_HAVE_SETJMP
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---help---
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x86-64 architectures.
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106
arch/x86_64/include/setjmp.h
Normal file
106
arch/x86_64/include/setjmp.h
Normal file
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@ -0,0 +1,106 @@
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/****************************************************************************
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* arch/x86_64/include/setjmp.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_X86_64_INCLUDE_SETJUMP_H
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#define __ARCH_X86_64_INCLUDE_SETJUMP_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/compiler.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Storage order: %rbx, %rsp, %rbp, %r12, %r13, %r14, %r15, %rip */
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# define XCPTCONTEXT_REGS 9
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# define XCPTCONTEXT_SIZE (8 * XCPTCONTEXT_REGS)
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# ifdef __ASSEMBLY__
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# define JB_RBX (0*8)
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# define JB_RSP (1*8)
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# define JB_RBP (2*8)
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# define JB_R12 (3*8)
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# define JB_R13 (4*8)
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# define JB_R14 (5*8)
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# define JB_R15 (6*8)
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# define JB_RIP (7*8)
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# define JB_FLAG (8*8)
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# else
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# define JB_RBX (0)
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# define JB_RSP (1)
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# define JB_RBP (2)
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# define JB_R12 (3)
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# define JB_R13 (4)
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# define JB_R14 (5)
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# define JB_R15 (6)
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# define JB_RIP (7)
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# define JB_FLAG (8)
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# endif /* __ASSEMBLY__ */
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/* Compatibility definitions */
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# define JB_FP JB_RBP
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# define JB_SP JB_RSP
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# define JB_PC JB_RIP
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/****************************************************************************
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* Public Types
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****************************************************************************/
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#ifndef __ASSEMBLY__
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typedef unsigned long xcpt_reg_t;
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typedef xcpt_reg_t jmp_buf[XCPTCONTEXT_REGS];
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifndef __ASSEMBLY__
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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int setjmp(jmp_buf env);
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void longjmp(jmp_buf env, int val) noreturn_function;
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* !__ASSEMBLY__ */
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#endif /* __ARCH_X86_64_INCLUDE_SETJUMP_H */
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@ -28,4 +28,8 @@ if(CONFIG_LIBC_ARCH_ELF)
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list(APPEND SRCS arch_elf.c)
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endif()
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if(CONFIG_ARCH_SETJMP_H)
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list(APPEND SRCS arch_setjmp_x86_64.S)
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endif()
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target_sources(c PRIVATE ${SRCS})
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@ -24,6 +24,9 @@ ifeq ($(CONFIG_LIBC_ARCH_ELF),y)
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CSRCS += arch_elf64.c
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endif
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ifeq ($(CONFIG_ARCH_SETJMP_H),y)
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ASRCS += arch_setjmp_x86_64.S
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endif
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ifeq ($(CONFIG_X86_64_MEMCMP),y)
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ASRCS += arch_memcmp.S
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endif
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119
libs/libc/machine/x86_64/arch_setjmp_x86_64.S
Normal file
119
libs/libc/machine/x86_64/arch_setjmp_x86_64.S
Normal file
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@ -0,0 +1,119 @@
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/**************************************************************************
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* libs/libc/machine/x86_64/arch_setjmp_x86_64.S
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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**************************************************************************/
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/**************************************************************************
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* Included Files
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**************************************************************************/
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#include <arch/setjmp.h>
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/**************************************************************************
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* Pre-processor Definitions
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**************************************************************************/
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# define REGS %rdi
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#ifdef __CYGWIN__
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# define SYMBOL(s) _##s
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#elif defined(__ELF__)
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# define SYMBOL(s) s
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#else
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# define SYMBOL(s) _##s
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#endif
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/**************************************************************************
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* Public Functions
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**************************************************************************/
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.text
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.align 4
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.globl SYMBOL(setjmp)
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#ifdef __ELF__
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.type SYMBOL(setjmp), @function
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#endif
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SYMBOL(setjmp):
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/* Get the return address, adjusting the stack pointer */
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pop %rsi
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/* Set up the return value */
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xorl %eax,%eax
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/* Save 1: rbx */
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movq %rbx, JB_RBX(REGS)
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/* Save 2: Value of the rsp *after* returning */
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movq %rsp, JB_RSP(REGS)
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/* Fix up the return stack */
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push %rsi
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/* Save registers */
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/* Storage order: %rbx, %rsp, %rbp, %r12, %r13, %r14, %r15, %rip */
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movq %rbp, JB_RBP(REGS) /* Save 3: rbp */
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movq %r12, JB_R12(REGS) /* Save 4: r12 */
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movq %r13, JB_R13(REGS) /* Save 5: r13 */
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movq %r14, JB_R14(REGS) /* Save 6: r14 */
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movq %r15, JB_R15(REGS) /* Save 7: r15 */
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movq %rsi, JB_RIP(REGS) /* Save 8: Return address */
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ret
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#ifdef __ELF__
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.size SYMBOL(setjmp), . - SYMBOL(setjmp)
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#endif
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.align 4
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.globl SYMBOL(longjmp)
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#ifdef __ELF__
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.type SYMBOL(longjmp), @function
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#endif
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SYMBOL(longjmp):
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/* Setup return value */
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movl %esi,%eax
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testl %eax,%eax
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jnz 1f
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incl %eax
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/* Restore registers */
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1:
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movq JB_RBX(REGS),%rbx /* Load 1: rbx */
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movq JB_RSP(REGS),%rsp /* Load 2: rsp */
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movq JB_RBP(REGS),%rbp /* Load 3: rdi */
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movq JB_R12(REGS),%r12 /* Load 4: r12 */
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movq JB_R13(REGS),%r13 /* Load 5: r13 */
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movq JB_R14(REGS),%r14 /* Load 6: r14 */
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movq JB_R15(REGS),%r15 /* Load 7: rbp */
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/* Jump to the saved return address (rip) */
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jmp *JB_RIP(REGS)
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#ifdef __ELF__
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.size SYMBOL(longjmp), . - SYMBOL(longjmp)
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#endif
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