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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-28 12:57:11 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-28 12:57:11 -0700 |
| commit | 909489bf9f88d314dc18be930cefa99ec9a4aac7 (patch) | |
| tree | b2080eaceaf79d272a2c4862df76a860e7bf81c3 /arch/x86/kernel/head_64.S | |
| parent | e5a0fc4e20d3b672489efc22b515c549bb77db42 (diff) | |
| parent | 41f45fb045bcc20e71eb705b361356e715682162 (diff) | |
| download | lwn-909489bf9f88d314dc18be930cefa99ec9a4aac7.tar.gz lwn-909489bf9f88d314dc18be930cefa99ec9a4aac7.zip | |
Merge tag 'x86-asm-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 asm updates from Ingo Molnar:
- Micro-optimize and standardize the do_syscall_64() calling convention
- Make syscall entry flags clearing more conservative
- Clean up syscall table handling
- Clean up & standardize assembly macros, in preparation of FRED
- Misc cleanups and fixes
* tag 'x86-asm-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/asm: Make <asm/asm.h> valid on cross-builds as well
x86/regs: Syscall_get_nr() returns -1 for a non-system call
x86/entry: Split PUSH_AND_CLEAR_REGS into two submacros
x86/syscall: Maximize MSR_SYSCALL_MASK
x86/syscall: Unconditionally prototype {ia32,x32}_sys_call_table[]
x86/entry: Reverse arguments to do_syscall_64()
x86/entry: Unify definitions from <asm/calling.h> and <asm/ptrace-abi.h>
x86/asm: Use _ASM_BYTES() in <asm/nops.h>
x86/asm: Add _ASM_BYTES() macro for a .byte ... opcode sequence
x86/asm: Have the __ASM_FORM macros handle commas in arguments
Diffstat (limited to 'arch/x86/kernel/head_64.S')
| -rw-r--r-- | arch/x86/kernel/head_64.S | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index 04bddaaba8e2..d8b3ebd2bb85 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -62,7 +62,7 @@ SYM_CODE_START_NOALIGN(startup_64) */ /* Set up the stack for verify_cpu(), similar to initial_stack below */ - leaq (__end_init_task - SIZEOF_PTREGS)(%rip), %rsp + leaq (__end_init_task - FRAME_SIZE)(%rip), %rsp leaq _text(%rip), %rdi pushq %rsi @@ -343,10 +343,10 @@ SYM_DATA(initial_vc_handler, .quad handle_vc_boot_ghcb) #endif /* - * The SIZEOF_PTREGS gap is a convention which helps the in-kernel unwinder + * The FRAME_SIZE gap is a convention which helps the in-kernel unwinder * reliably detect the end of the stack. */ -SYM_DATA(initial_stack, .quad init_thread_union + THREAD_SIZE - SIZEOF_PTREGS) +SYM_DATA(initial_stack, .quad init_thread_union + THREAD_SIZE - FRAME_SIZE) __FINITDATA __INIT |