| Server IP : 74.208.127.88 / Your IP : 216.73.216.28 Web Server : Apache/2.4.41 (Ubuntu) System : Linux ubuntu 5.4.0-163-generic #180-Ubuntu SMP Tue Sep 5 13:21:23 UTC 2023 x86_64 User : www-data ( 33) PHP Version : 7.4.3-4ubuntu2.29 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /proc/self/root/lib/modules/5.4.0-163-generic/build/arch/x86/include/asm/ |
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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_FRAME_H #define _ASM_X86_FRAME_H #include <asm/asm.h> /* * These are stack frame creation macros. They should be used by every * callable non-leaf asm function to make kernel stack traces more reliable. */ #ifdef CONFIG_FRAME_POINTER #ifdef __ASSEMBLY__ .macro FRAME_BEGIN push %_ASM_BP _ASM_MOV %_ASM_SP, %_ASM_BP .endm .macro FRAME_END pop %_ASM_BP .endm #ifdef CONFIG_X86_64 /* * This is a sneaky trick to help the unwinder find pt_regs on the stack. The * frame pointer is replaced with an encoded pointer to pt_regs. The encoding * is just setting the LSB, which makes it an invalid stack address and is also * a signal to the unwinder that it's a pt_regs pointer in disguise. * * NOTE: This macro must be used *after* PUSH_AND_CLEAR_REGS because it corrupts * the original rbp. */ .macro ENCODE_FRAME_POINTER ptregs_offset=0 leaq 1+\ptregs_offset(%rsp), %rbp .endm #else /* !CONFIG_X86_64 */ /* * This is a sneaky trick to help the unwinder find pt_regs on the stack. The * frame pointer is replaced with an encoded pointer to pt_regs. The encoding * is just clearing the MSB, which makes it an invalid stack address and is also * a signal to the unwinder that it's a pt_regs pointer in disguise. * * NOTE: This macro must be used *after* SAVE_ALL because it corrupts the * original ebp. */ .macro ENCODE_FRAME_POINTER mov %esp, %ebp andl $0x7fffffff, %ebp .endm #endif /* CONFIG_X86_64 */ #else /* !__ASSEMBLY__ */ #define FRAME_BEGIN \ "push %" _ASM_BP "\n" \ _ASM_MOV "%" _ASM_SP ", %" _ASM_BP "\n" #define FRAME_END "pop %" _ASM_BP "\n" #ifdef CONFIG_X86_64 #define ENCODE_FRAME_POINTER \ "lea 1(%rsp), %rbp\n\t" #else /* !CONFIG_X86_64 */ #define ENCODE_FRAME_POINTER \ "movl %esp, %ebp\n\t" \ "andl $0x7fffffff, %ebp\n\t" #endif /* CONFIG_X86_64 */ #endif /* __ASSEMBLY__ */ #define FRAME_OFFSET __ASM_SEL(4, 8) #else /* !CONFIG_FRAME_POINTER */ #ifdef __ASSEMBLY__ .macro ENCODE_FRAME_POINTER ptregs_offset=0 .endm #else /* !__ASSEMBLY */ #define ENCODE_FRAME_POINTER #endif #define FRAME_BEGIN #define FRAME_END #define FRAME_OFFSET 0 #endif /* CONFIG_FRAME_POINTER */ #endif /* _ASM_X86_FRAME_H */