The following commit has been merged into the x86/asm branch of tip: Commit-ID: 4aec216b93dd8e3597124f41369ec835ff18dbd0 Gitweb: https://git.kernel.org/tip/4aec216b93dd8e3597124f41369ec835ff18dbd0 Author: Jiri Slaby <jslaby@xxxxxxx> AuthorDate: Fri, 11 Oct 2019 13:51:02 +02:00 Committer: Borislav Petkov <bp@xxxxxxx> CommitterDate: Fri, 18 Oct 2019 11:58:16 +02:00 x86/asm/64: Add ENDs to some functions and relabel with SYM_CODE_* All these are functions which are invoked from elsewhere but they are not typical C functions. So annotate them using the new SYM_CODE_START. All these were not balanced with any END, so mark their ends by SYM_CODE_END appropriately too. Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> Signed-off-by: Borislav Petkov <bp@xxxxxxx> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx> [xen bits] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> [power mgmt] Cc: Andy Shevchenko <andy@xxxxxxxxxxxxx> Cc: Cao jin <caoj.fnst@xxxxxxxxxxxxxx> Cc: Darren Hart <dvhart@xxxxxxxxxxxxx> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Juergen Gross <jgross@xxxxxxxx> Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx> Cc: linux-arch@xxxxxxxxxxxxxxx Cc: linux-pm@xxxxxxxxxxxxxxx Cc: Pavel Machek <pavel@xxxxxx> Cc: Pingfan Liu <kernelfans@xxxxxxxxx> Cc: platform-driver-x86@xxxxxxxxxxxxxxx Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx> Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Wei Huang <wei@xxxxxxxxxx> Cc: x86-ml <x86@xxxxxxxxxx> Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx Cc: Xiaoyao Li <xiaoyao.li@xxxxxxxxxxxxxxx> Link: https://lkml.kernel.org/r/20191011115108.12392-23-jslaby@xxxxxxx --- arch/x86/boot/compressed/head_64.S | 6 ++++-- arch/x86/platform/olpc/xo1-wakeup.S | 3 ++- arch/x86/power/hibernate_asm_64.S | 6 ++++-- arch/x86/realmode/rm/reboot.S | 3 ++- arch/x86/realmode/rm/trampoline_64.S | 10 +++++++--- arch/x86/realmode/rm/wakeup_asm.S | 3 ++- arch/x86/xen/xen-asm_64.S | 6 ++++-- 7 files changed, 25 insertions(+), 12 deletions(-) diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index ca762ea..5580046 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -250,7 +250,7 @@ ENDPROC(efi32_stub_entry) .code64 .org 0x200 -ENTRY(startup_64) +SYM_CODE_START(startup_64) /* * 64bit entry is 0x200 and it is ABI so immutable! * We come here either from startup_32 or directly from a @@ -442,6 +442,7 @@ trampoline_return: */ leaq .Lrelocated(%rbx), %rax jmp *%rax +SYM_CODE_END(startup_64) #ifdef CONFIG_EFI_STUB @@ -571,7 +572,7 @@ SYM_FUNC_END(.Lrelocated) * ECX contains the base address of the trampoline memory. * Non zero RDX means trampoline needs to enable 5-level paging. */ -ENTRY(trampoline_32bit_src) +SYM_CODE_START(trampoline_32bit_src) /* Set up data and stack segments */ movl $__KERNEL_DS, %eax movl %eax, %ds @@ -634,6 +635,7 @@ ENTRY(trampoline_32bit_src) movl %eax, %cr0 lret +SYM_CODE_END(trampoline_32bit_src) .code64 SYM_FUNC_START_LOCAL_NOALIGN(.Lpaging_enabled) diff --git a/arch/x86/platform/olpc/xo1-wakeup.S b/arch/x86/platform/olpc/xo1-wakeup.S index 5fee3a2..75f4faf 100644 --- a/arch/x86/platform/olpc/xo1-wakeup.S +++ b/arch/x86/platform/olpc/xo1-wakeup.S @@ -90,7 +90,7 @@ restore_registers: ret -ENTRY(do_olpc_suspend_lowlevel) +SYM_CODE_START(do_olpc_suspend_lowlevel) call save_processor_state call save_registers @@ -110,6 +110,7 @@ ret_point: call restore_registers call restore_processor_state ret +SYM_CODE_END(do_olpc_suspend_lowlevel) .data saved_gdt: .long 0,0 diff --git a/arch/x86/power/hibernate_asm_64.S b/arch/x86/power/hibernate_asm_64.S index a4d5eb0..4057cd5 100644 --- a/arch/x86/power/hibernate_asm_64.S +++ b/arch/x86/power/hibernate_asm_64.S @@ -52,7 +52,7 @@ ENTRY(swsusp_arch_suspend) ret ENDPROC(swsusp_arch_suspend) -ENTRY(restore_image) +SYM_CODE_START(restore_image) /* prepare to jump to the image kernel */ movq restore_jump_address(%rip), %r8 movq restore_cr3(%rip), %r9 @@ -67,9 +67,10 @@ ENTRY(restore_image) /* jump to relocated restore code */ movq relocated_restore_code(%rip), %rcx jmpq *%rcx +SYM_CODE_END(restore_image) /* code below has been relocated to a safe page */ -ENTRY(core_restore_code) +SYM_CODE_START(core_restore_code) /* switch to temporary page tables */ movq %rax, %cr3 /* flush TLB */ @@ -97,6 +98,7 @@ ENTRY(core_restore_code) .Ldone: /* jump to the restore_registers address from the image header */ jmpq *%r8 +SYM_CODE_END(core_restore_code) /* code below belongs to the image kernel */ .align PAGE_SIZE diff --git a/arch/x86/realmode/rm/reboot.S b/arch/x86/realmode/rm/reboot.S index 424826a..f10515b 100644 --- a/arch/x86/realmode/rm/reboot.S +++ b/arch/x86/realmode/rm/reboot.S @@ -19,7 +19,7 @@ */ .section ".text32", "ax" .code32 -ENTRY(machine_real_restart_asm) +SYM_CODE_START(machine_real_restart_asm) #ifdef CONFIG_X86_64 /* Switch to trampoline GDT as it is guaranteed < 4 GiB */ @@ -63,6 +63,7 @@ SYM_INNER_LABEL(machine_real_restart_paging_off, SYM_L_GLOBAL) movl %ecx, %gs movl %ecx, %ss ljmpw $8, $1f +SYM_CODE_END(machine_real_restart_asm) /* * This is 16-bit protected mode code to disable paging and the cache, diff --git a/arch/x86/realmode/rm/trampoline_64.S b/arch/x86/realmode/rm/trampoline_64.S index c1aeab1..251758e 100644 --- a/arch/x86/realmode/rm/trampoline_64.S +++ b/arch/x86/realmode/rm/trampoline_64.S @@ -38,7 +38,7 @@ .code16 .balign PAGE_SIZE -ENTRY(trampoline_start) +SYM_CODE_START(trampoline_start) cli # We should be safe anyway wbinvd @@ -78,12 +78,14 @@ ENTRY(trampoline_start) no_longmode: hlt jmp no_longmode +SYM_CODE_END(trampoline_start) + #include "../kernel/verify_cpu.S" .section ".text32","ax" .code32 .balign 4 -ENTRY(startup_32) +SYM_CODE_START(startup_32) movl %edx, %ss addl $pa_real_mode_base, %esp movl %edx, %ds @@ -137,13 +139,15 @@ ENTRY(startup_32) * the new gdt/idt that has __KERNEL_CS with CS.L = 1. */ ljmpl $__KERNEL_CS, $pa_startup_64 +SYM_CODE_END(startup_32) .section ".text64","ax" .code64 .balign 4 -ENTRY(startup_64) +SYM_CODE_START(startup_64) # Now jump into the kernel using virtual addresses jmpq *tr_start(%rip) +SYM_CODE_END(startup_64) .section ".rodata","a" # Duplicate the global descriptor table diff --git a/arch/x86/realmode/rm/wakeup_asm.S b/arch/x86/realmode/rm/wakeup_asm.S index 01092d6..02d0ba1 100644 --- a/arch/x86/realmode/rm/wakeup_asm.S +++ b/arch/x86/realmode/rm/wakeup_asm.S @@ -37,7 +37,7 @@ SYM_DATA_END(wakeup_header) .code16 .balign 16 -ENTRY(wakeup_start) +SYM_CODE_START(wakeup_start) cli cld @@ -135,6 +135,7 @@ ENTRY(wakeup_start) #else jmp trampoline_start #endif +SYM_CODE_END(wakeup_start) bogus_real_magic: 1: diff --git a/arch/x86/xen/xen-asm_64.S b/arch/x86/xen/xen-asm_64.S index 45c1249..c209c70 100644 --- a/arch/x86/xen/xen-asm_64.S +++ b/arch/x86/xen/xen-asm_64.S @@ -85,11 +85,12 @@ hypercall_iret = hypercall_page + __HYPERVISOR_iret * 32 * r11 }<-- pushed by hypercall page * rsp->rax } */ -ENTRY(xen_iret) +SYM_CODE_START(xen_iret) pushq $0 jmp hypercall_iret +SYM_CODE_END(xen_iret) -ENTRY(xen_sysret64) +SYM_CODE_START(xen_sysret64) /* * We're already on the usermode stack at this point, but * still with the kernel gs, so we can easily switch back. @@ -107,6 +108,7 @@ ENTRY(xen_sysret64) pushq $VGCF_in_syscall jmp hypercall_iret +SYM_CODE_END(xen_sysret64) /* * Xen handles syscall callbacks much like ordinary exceptions, which
