diff options
Diffstat (limited to 'arch/x86')
27 files changed, 350 insertions, 1101 deletions
diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 57996ee840dd..43e8328a23e4 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -149,12 +149,6 @@ endif sp-$(CONFIG_X86_32) := esp sp-$(CONFIG_X86_64) := rsp -# do binutils support CFI? -cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1) -# is .cfi_signal_frame supported too? -cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1) -cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1) - # does binutils support specific instructions? asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1) asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1) @@ -162,8 +156,8 @@ asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1) avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) -KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) -KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) +KBUILD_AFLAGS += $(asinstr) $(avx_instr) $(avx2_instr) +KBUILD_CFLAGS += $(asinstr) $(avx_instr) $(avx2_instr) LDFLAGS := -m elf_$(UTS_MACHINE) diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S index 63450a596800..2be23c734db5 100644 --- a/arch/x86/ia32/ia32entry.S +++ b/arch/x86/ia32/ia32entry.S @@ -4,7 +4,6 @@ * Copyright 2000-2002 Andi Kleen, SuSE Labs. */ -#include <asm/dwarf2.h> #include <asm/calling.h> #include <asm/asm-offsets.h> #include <asm/current.h> @@ -60,17 +59,6 @@ movl %eax,%eax /* zero extension */ .endm - .macro CFI_STARTPROC32 simple - CFI_STARTPROC \simple - CFI_UNDEFINED r8 - CFI_UNDEFINED r9 - CFI_UNDEFINED r10 - CFI_UNDEFINED r11 - CFI_UNDEFINED r12 - CFI_UNDEFINED r13 - CFI_UNDEFINED r14 - CFI_UNDEFINED r15 - .endm #ifdef CONFIG_PARAVIRT ENTRY(native_usergs_sysret32) @@ -102,11 +90,6 @@ ENDPROC(native_usergs_sysret32) * with the int 0x80 path. */ ENTRY(ia32_sysenter_target) - CFI_STARTPROC32 simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA rsp,0 - CFI_REGISTER rsp,rbp - /* * Interrupts are off on entry. * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON, @@ -121,25 +104,21 @@ ENTRY(ia32_sysenter_target) movl %eax, %eax movl ASM_THREAD_INFO(TI_sysenter_return, %rsp, 0), %r10d - CFI_REGISTER rip,r10 /* Construct struct pt_regs on stack */ - pushq_cfi $__USER32_DS /* pt_regs->ss */ - pushq_cfi %rbp /* pt_regs->sp */ - CFI_REL_OFFSET rsp,0 - pushfq_cfi /* pt_regs->flags */ - pushq_cfi $__USER32_CS /* pt_regs->cs */ - pushq_cfi %r10 /* pt_regs->ip = thread_info->sysenter_return */ - CFI_REL_OFFSET rip,0 - pushq_cfi_reg rax /* pt_regs->orig_ax */ - pushq_cfi_reg rdi /* pt_regs->di */ - pushq_cfi_reg rsi /* pt_regs->si */ - pushq_cfi_reg rdx /* pt_regs->dx */ - pushq_cfi_reg rcx /* pt_regs->cx */ - pushq_cfi $-ENOSYS /* pt_regs->ax */ + pushq $__USER32_DS /* pt_regs->ss */ + pushq %rbp /* pt_regs->sp */ + pushfq /* pt_regs->flags */ + pushq $__USER32_CS /* pt_regs->cs */ + pushq %r10 /* pt_regs->ip = thread_info->sysenter_return */ + pushq %rax /* pt_regs->orig_ax */ + pushq %rdi /* pt_regs->di */ + pushq %rsi /* pt_regs->si */ + pushq %rdx /* pt_regs->dx */ + pushq %rcx /* pt_regs->cx */ + pushq $-ENOSYS /* pt_regs->ax */ cld sub $(10*8),%rsp /* pt_regs->r8-11,bp,bx,r12-15 not saved */ - CFI_ADJUST_CFA_OFFSET 10*8 /* * no need to do an access_ok check here because rbp has been @@ -161,8 +140,8 @@ sysenter_flags_fixed: orl $TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) - CFI_REMEMBER_STATE jnz sysenter_tracesys + sysenter_do_call: /* 32bit syscall -> 64bit C ABI argument conversion */ movl %edi,%r8d /* arg5 */ @@ -193,14 +172,12 @@ sysexit_from_sys_call: */ andl $~TS_COMPAT,ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) movl RIP(%rsp),%ecx /* User %eip */ - CFI_REGISTER rip,rcx RESTORE_RSI_RDI xorl %edx,%edx /* avoid info leaks */ xorq %r8,%r8 xorq %r9,%r9 xorq %r10,%r10 movl EFLAGS(%rsp),%r11d /* User eflags */ - /*CFI_RESTORE rflags*/ TRACE_IRQS_ON /* @@ -231,8 +208,6 @@ sysexit_from_sys_call: */ USERGS_SYSRET32 - CFI_RESTORE_STATE - #ifdef CONFIG_AUDITSYSCALL .macro auditsys_entry_common movl %esi,%r8d /* 5th arg: 4th syscall arg */ @@ -282,8 +257,8 @@ sysexit_audit: #endif sysenter_fix_flags: - pushq_cfi $(X86_EFLAGS_IF|X86_EFLAGS_FIXED) - popfq_cfi + pushq $(X86_EFLAGS_IF|X86_EFLAGS_FIXED) + popfq jmp sysenter_flags_fixed sysenter_tracesys: @@ -298,7 +273,6 @@ sysenter_tracesys: LOAD_ARGS32 /* reload args from stack in case ptrace changed it */ RESTORE_EXTRA_REGS jmp sysenter_do_call - CFI_ENDPROC ENDPROC(ia32_sysenter_target) /* @@ -332,12 +306,6 @@ ENDPROC(ia32_sysenter_target) * with the int 0x80 path. */ ENTRY(ia32_cstar_target) - CFI_STARTPROC32 simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA rsp,0 - CFI_REGISTER rip,rcx - /*CFI_REGISTER rflags,r11*/ - /* * Interrupts are off on entry. * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON, @@ -345,7 +313,6 @@ ENTRY(ia32_cstar_target) */ SWAPGS_UNSAFE_STACK movl %esp,%r8d - CFI_REGISTER rsp,r8 movq PER_CPU_VAR(cpu_current_top_of_stack),%rsp ENABLE_INTERRUPTS(CLBR_NONE) @@ -353,22 +320,19 @@ ENTRY(ia32_cstar_target) movl %eax,%eax /* Construct struct pt_regs on stack */ - pushq_cfi $__USER32_DS /* pt_regs->ss */ - pushq_cfi %r8 /* pt_regs->sp */ - CFI_REL_OFFSET rsp,0 - pushq_cfi %r11 /* pt_regs->flags */ - pushq_cfi $__USER32_CS /* pt_regs->cs */ - pushq_cfi %rcx /* pt_regs->ip */ - CFI_REL_OFFSET rip,0 - pushq_cfi_reg rax /* pt_regs->orig_ax */ - pushq_cfi_reg rdi /* pt_regs->di */ - pushq_cfi_reg rsi /* pt_regs->si */ - pushq_cfi_reg rdx /* pt_regs->dx */ - pushq_cfi_reg rbp /* pt_regs->cx */ + pushq $__USER32_DS /* pt_regs->ss */ + pushq %r8 /* pt_regs->sp */ + pushq %r11 /* pt_regs->flags */ + pushq $__USER32_CS /* pt_regs->cs */ + pushq %rcx /* pt_regs->ip */ + pushq %rax /* pt_regs->orig_ax */ + pushq %rdi /* pt_regs->di */ + pushq %rsi /* pt_regs->si */ + pushq %rdx /* pt_regs->dx */ + pushq %rbp /* pt_regs->cx */ movl %ebp,%ecx - pushq_cfi $-ENOSYS /* pt_regs->ax */ + pushq $-ENOSYS /* pt_regs->ax */ sub $(10*8),%rsp /* pt_regs->r8-11,bp,bx,r12-15 not saved */ - CFI_ADJUST_CFA_OFFSET 10*8 /* * no need to do an access_ok check here because r8 has been @@ -380,8 +344,8 @@ ENTRY(ia32_cstar_target) ASM_CLAC orl $TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) - CFI_REMEMBER_STATE jnz cstar_tracesys + cstar_do_call: /* 32bit syscall -> 64bit C ABI argument conversion */ movl %edi,%r8d /* arg5 */ @@ -403,15 +367,12 @@ sysretl_from_sys_call: andl $~TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) RESTORE_RSI_RDI_RDX movl RIP(%rsp),%ecx - CFI_REGISTER rip,rcx movl EFLAGS(%rsp),%r11d - /*CFI_REGISTER rflags,r11*/ xorq %r10,%r10 xorq %r9,%r9 xorq %r8,%r8 TRACE_IRQS_ON movl RSP(%rsp),%esp - CFI_RESTORE rsp /* * 64bit->32bit SYSRET restores eip from ecx, * eflags from r11 (but RF and VM bits are forced to 0), @@ -430,7 +391,6 @@ sysretl_from_sys_call: #ifdef CONFIG_AUDITSYSCALL cstar_auditsys: - CFI_RESTORE_STATE movl %r9d,R9(%rsp) /* register to be clobbered by call */ auditsys_entry_common movl R9(%rsp),%r9d /* reload 6th syscall arg */ @@ -460,7 +420,6 @@ ia32_badarg: ASM_CLAC movq $-EFAULT,%rax jmp ia32_sysret - CFI_ENDPROC /* * Emulated IA32 system calls via int 0x80. @@ -484,15 +443,6 @@ ia32_badarg: */ ENTRY(ia32_syscall) - CFI_STARTPROC32 simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA rsp,5*8 - /*CFI_REL_OFFSET ss,4*8 */ - CFI_REL_OFFSET rsp,3*8 - /*CFI_REL_OFFSET rflags,2*8 */ - /*CFI_REL_OFFSET cs,1*8 */ - CFI_REL_OFFSET rip,0*8 - /* * Interrupts are off on entry. * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON, @@ -506,15 +456,14 @@ ENTRY(ia32_syscall) movl %eax,%eax /* Construct struct pt_regs on stack (iret frame is already on stack) */ - pushq_cfi_reg rax /* pt_regs->orig_ax */ - pushq_cfi_reg rdi /* pt_regs->di */ - pushq_cfi_reg rsi /* pt_regs->si */ - pushq_cfi_reg rdx /* pt_regs->dx */ - pushq_cfi_reg rcx /* pt_regs->cx */ - pushq_cfi $-ENOSYS /* pt_regs->ax */ + pushq %rax /* pt_regs->orig_ax */ + pushq %rdi /* pt_regs->di */ + pushq %rsi /* pt_regs->si */ + pushq %rdx /* pt_regs->dx */ + pushq %rcx /* pt_regs->cx */ + pushq $-ENOSYS /* pt_regs->ax */ cld sub $(10*8),%rsp /* pt_regs->r8-11,bp,bx,r12-15 not saved */ - CFI_ADJUST_CFA_OFFSET 10*8 orl $TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) @@ -544,7 +493,6 @@ ia32_tracesys: LOAD_ARGS32 /* reload args from stack in case ptrace changed it */ RESTORE_EXTRA_REGS jmp ia32_do_call - CFI_ENDPROC END(ia32_syscall) .macro PTREGSCALL label, func @@ -554,8 +502,6 @@ GLOBAL(\label) jmp ia32_ptregs_common .endm - CFI_STARTPROC32 - PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn PTREGSCALL stub32_sigreturn, sys32_sigreturn PTREGSCALL stub32_fork, sys_fork @@ -569,23 +515,8 @@ GLOBAL(stub32_clone) ALIGN ia32_ptregs_common: - CFI_ENDPROC - CFI_STARTPROC32 simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA rsp,SIZEOF_PTREGS - CFI_REL_OFFSET rax,RAX - CFI_REL_OFFSET rcx,RCX - CFI_REL_OFFSET rdx,RDX - CFI_REL_OFFSET rsi,RSI - CFI_REL_OFFSET rdi,RDI - CFI_REL_OFFSET rip,RIP -/* CFI_REL_OFFSET cs,CS*/ -/* CFI_REL_OFFSET rflags,EFLAGS*/ - CFI_REL_OFFSET rsp,RSP -/* CFI_REL_OFFSET ss,SS*/ SAVE_EXTRA_REGS 8 call *%rax RESTORE_EXTRA_REGS 8 ret - CFI_ENDPROC END(ia32_ptregs_common) diff --git a/arch/x86/include/asm/calling.h b/arch/x86/include/asm/calling.h index 1c8b50edb2db..0d76accde45b 100644 --- a/arch/x86/include/asm/calling.h +++ b/arch/x86/include/asm/calling.h @@ -46,8 +46,6 @@ For 32-bit we have the following conventions - kernel is built with */ -#include <asm/dwarf2.h> - #ifdef CONFIG_X86_64 /* @@ -92,27 +90,26 @@ For 32-bit we have the following conventions - kernel is built with .macro ALLOC_PT_GPREGS_ON_STACK addskip=0 subq $15*8+\addskip, %rsp - CFI_ADJUST_CFA_OFFSET 15*8+\addskip .endm .macro SAVE_C_REGS_HELPER offset=0 rax=1 rcx=1 r8910=1 r11=1 .if \r11 - movq_cfi r11, 6*8+\offset + movq %r11, 6*8+\offset(%rsp) .endif .if \r8910 - movq_cfi r10, 7*8+\offset - movq_cfi r9, 8*8+\offset - movq_cfi r8, 9*8+\offset + movq %r10, 7*8+\offset(%rsp) + movq %r9, 8*8+\offset(%rsp) + movq %r8, 9*8+\offset(%rsp) .endif .if \rax - movq_cfi rax, 10*8+\offset + movq %rax, 10*8+\offset(%rsp) .endif .if \rcx - movq_cfi rcx, 11*8+\offset + movq %rcx, 11*8+\offset(%rsp) .endif - movq_cfi rdx, 12*8+\offset - movq_cfi rsi, 13*8+\offset - movq_cfi rdi, 14*8+\offset + movq %rdx, 12*8+\offset(%rsp) + movq %rsi, 13*8+\offset(%rsp) + movq %rdi, 14*8+\offset(%rsp) .endm .macro SAVE_C_REGS offset=0 SAVE_C_REGS_HELPER \offset, 1, 1, 1, 1 @@ -131,24 +128,24 @@ For 32-bit we have the following conventions - kernel is built with .endm .macro SAVE_EXTRA_REGS offset=0 - movq_cfi r15, 0*8+\offset - movq_cfi r14, 1*8+\offset - movq_cfi r13, 2*8+\offset - movq_cfi r12, 3*8+\offset - movq_cfi rbp, 4*8+\offset - movq_cfi rbx, 5*8+\offset + movq %r15, 0*8+\offset(%rsp) + movq %r14, 1*8+\offset(%rsp) + movq %r13, 2*8+\offset(%rsp) + movq %r12, 3*8+\offset(%rsp) + movq %rbp, 4*8+\offset(%rsp) + movq %rbx, 5*8+\offset(%rsp) .endm .macro SAVE_EXTRA_REGS_RBP offset=0 - movq_cfi rbp, 4*8+\offset + movq %rbp, 4*8+\offset(%rsp) .endm .macro RESTORE_EXTRA_REGS offset=0 - movq_cfi_restore 0*8+\offset, r15 - movq_cfi_restore 1*8+\offset, r14 - movq_cfi_restore 2*8+\offset, r13 - movq_cfi_restore 3*8+\offset, r12 - movq_cfi_restore 4*8+\offset, rbp - movq_cfi_restore 5*8+\offset, rbx + movq 0*8+\offset(%rsp), %r15 + movq 1*8+\offset(%rsp), %r14 + movq 2*8+\offset(%rsp), %r13 + movq 3*8+\offset(%rsp), %r12 + movq 4*8+\offset(%rsp), %rbp + movq 5*8+\offset(%rsp), %rbx .endm .macro ZERO_EXTRA_REGS @@ -162,24 +159,24 @@ For 32-bit we have the following conventions - kernel is built with .macro RESTORE_C_REGS_HELPER rstor_rax=1, rstor_rcx=1, rstor_r11=1, rstor_r8910=1, rstor_rdx=1 .if \rstor_r11 - movq_cfi_restore 6*8, r11 + movq 6*8(%rsp), %r11 .endif .if \rstor_r8910 - movq_cfi_restore 7*8, r10 - movq_cfi_restore 8*8, r9 - movq_cfi_restore 9*8, r8 + movq 7*8(%rsp), %r10 + movq 8*8(%rsp), %r9 + movq 9*8(%rsp), %r8 .endif .if \rstor_rax - movq_cfi_restore 10*8, rax + movq 10*8(%rsp), %rax .endif .if \rstor_rcx - movq_cfi_restore 11*8, rcx + movq 11*8(%rsp), %rcx .endif .if \rstor_rdx - movq_cfi_restore 12*8, rdx + movq 12*8(%rsp), %rdx .endif - movq_cfi_restore 13*8, rsi - movq_cfi_restore 14*8, rdi + movq 13*8(%rsp), %rsi + movq 14*8(%rsp), %rdi .endm .macro RESTORE_C_REGS RESTORE_C_REGS_HELPER 1,1,1,1,1 @@ -205,7 +202,6 @@ For 32-bit we have the following conventions - kernel is built with .macro REMOVE_PT_GPREGS_FROM_STACK addskip=0 addq $15*8+\addskip, %rsp - CFI_ADJUST_CFA_OFFSET -(15*8+\addskip) .endm .macro icebp @@ -224,23 +220,23 @@ For 32-bit we have the following conventions - kernel is built with */ .macro SAVE_ALL - pushl_cfi_reg eax - pushl_cfi_reg ebp - pushl_cfi_reg edi - pushl_cfi_reg esi - pushl_cfi_reg edx - pushl_cfi_reg ecx - pushl_cfi_reg ebx + pushl %eax + pushl %ebp + pushl %edi + pushl %esi + pushl %edx + pushl %ecx + pushl %ebx .endm .macro RESTORE_ALL - popl_cfi_reg ebx - popl_cfi_reg ecx - popl_cfi_reg edx - popl_cfi_reg esi - popl_cfi_reg edi - popl_cfi_reg ebp - popl_cfi_reg eax + popl %ebx + popl %ecx + popl %edx + popl %esi + popl %edi + popl %ebp + popl %eax .endm #endif /* CONFIG_X86_64 */ diff --git a/arch/x86/include/asm/dwarf2.h b/arch/x86/include/asm/dwarf2.h deleted file mode 100644 index de1cdaf4d743..000000000000 --- a/arch/x86/include/asm/dwarf2.h +++ /dev/null @@ -1,170 +0,0 @@ -#ifndef _ASM_X86_DWARF2_H -#define _ASM_X86_DWARF2_H - -#ifndef __ASSEMBLY__ -#warning "asm/dwarf2.h should be only included in pure assembly files" -#endif - -/* - * Macros for dwarf2 CFI unwind table entries. - * See "as.info" for details on these pseudo ops. Unfortunately - * they are only supported in very new binutils, so define them - * away for older version. - */ - -#ifdef CONFIG_AS_CFI - -#define CFI_STARTPROC .cfi_startproc -#define CFI_ENDPROC .cfi_endproc -#define CFI_DEF_CFA .cfi_def_cfa -#define CFI_DEF_CFA_REGISTER .cfi_def_cfa_register -#define CFI_DEF_CFA_OFFSET .cfi_def_cfa_offset -#define CFI_ADJUST_CFA_OFFSET .cfi_adjust_cfa_offset -#define CFI_OFFSET .cfi_offset -#define CFI_REL_OFFSET .cfi_rel_offset -#define CFI_REGISTER .cfi_register -#define CFI_RESTORE .cfi_restore -#define CFI_REMEMBER_STATE .cfi_remember_state -#define CFI_RESTORE_STATE .cfi_restore_state -#define CFI_UNDEFINED .cfi_undefined -#define CFI_ESCAPE .cfi_escape - -#ifdef CONFIG_AS_CFI_SIGNAL_FRAME -#define CFI_SIGNAL_FRAME .cfi_signal_frame -#else -#define CFI_SIGNAL_FRAME -#endif - -#if defined(CONFIG_AS_CFI_SECTIONS) && defined(__ASSEMBLY__) - /* - * Emit CFI data in .debug_frame sections, not .eh_frame sections. - * The latter we currently just discard since we don't do DWARF - * unwinding at runtime. So only the offline DWARF information is - * useful to anyone. Note we should not use this directive if this - * file is used in the vDSO assembly, or if vmlinux.lds.S gets - * changed so it doesn't discard .eh_frame. - */ - .cfi_sections .debug_frame -#endif - -#else - -/* - * Due to the structure of pre-exisiting code, don't use assembler line - * comment character # to ignore the arguments. Instead, use a dummy macro. - */ -.macro cfi_ignore a=0, b=0, c=0, d=0 -.endm - -#define CFI_STARTPROC cfi_ignore -#define CFI_ENDPROC cfi_ignore -#define CFI_DEF_CFA cfi_ignore -#define CFI_DEF_CFA_REGISTER cfi_ignore -#define CFI_DEF_CFA_OFFSET cfi_ignore -#define CFI_ADJUST_CFA_OFFSET cfi_ignore -#define CFI_OFFSET cfi_ignore -#define CFI_REL_OFFSET cfi_ignore -#define CFI_REGISTER cfi_ignore -#define CFI_RESTORE cfi_ignore -#define CFI_REMEMBER_STATE cfi_ignore -#define CFI_RESTORE_STATE cfi_ignore -#define CFI_UNDEFINED cfi_ignore -#define CFI_ESCAPE cfi_ignore -#define CFI_SIGNAL_FRAME cfi_ignore - -#endif - -/* - * An attempt to make CFI annotations more or less - * correct and shorter. It is implied that you know - * what you're doing if you use them. - */ -#ifdef __ASSEMBLY__ -#ifdef CONFIG_X86_64 - .macro pushq_cfi reg - pushq \reg - CFI_ADJUST_CFA_OFFSET 8 - .endm - - .macro pushq_cfi_reg reg - pushq %\reg - CFI_ADJUST_CFA_OFFSET 8 - CFI_REL_OFFSET \reg, 0 - .endm - - .macro popq_cfi reg - popq \reg - CFI_ADJUST_CFA_OFFSET -8 - .endm - - .macro popq_cfi_reg reg - popq %\reg - CFI_ADJUST_CFA_OFFSET -8 - CFI_RESTORE \reg - .endm - - .macro pushfq_cfi - pushfq - CFI_ADJUST_CFA_OFFSET 8 - .endm - - .macro popfq_cfi - popfq - CFI_ADJUST_CFA_OFFSET -8 - .endm - - .macro movq_cfi reg offset=0 - movq %\reg, \offset(%rsp) - CFI_REL_OFFSET \reg, \offset - .endm - - .macro movq_cfi_restore offset reg - movq \offset(%rsp), %\reg - CFI_RESTORE \reg - .endm -#else /*!CONFIG_X86_64*/ - .macro pushl_cfi reg - pushl \reg - CFI_ADJUST_CFA_OFFSET 4 - .endm - - .macro pushl_cfi_reg reg - pushl %\reg - CFI_ADJUST_CFA_OFFSET 4 - CFI_REL_OFFSET \reg, 0 - .endm - - .macro popl_cfi reg - popl \reg - CFI_ADJUST_CFA_OFFSET -4 - .endm - - .macro popl_cfi_reg reg - popl %\reg - CFI_ADJUST_CFA_OFFSET -4 - CFI_RESTORE \reg - .endm - - .macro pushfl_cfi - pushfl - CFI_ADJUST_CFA_OFFSET 4 - .endm - - .macro popfl_cfi - popfl - CFI_ADJUST_CFA_OFFSET -4 - .endm - - .macro movl_cfi reg offset=0 - movl %\reg, \offset(%esp) - CFI_REL_OFFSET \reg, \offset - .endm - - .macro movl_cfi_restore offset reg - movl \offset(%esp), %\reg - CFI_RESTORE \reg - .endm -#endif /*!CONFIG_X86_64*/ -#endif /*__ASSEMBLY__*/ - -#endif /* _ASM_X86_DWARF2_H */ diff --git a/arch/x86/include/asm/frame.h b/arch/x86/include/asm/frame.h index 3b629f47eb65..793179cf8e21 100644 --- a/arch/x86/include/asm/frame.h +++ b/arch/x86/include/asm/frame.h @@ -1,20 +1,17 @@ #ifdef __ASSEMBLY__ #include <asm/asm.h> -#include <asm/dwarf2.h> /* The annotation hides the frame from the unwinder and makes it look like a ordinary ebp save/restore. This avoids some special cases for frame pointer later */ #ifdef CONFIG_FRAME_POINTER .macro FRAME - __ASM_SIZE(push,_cfi) %__ASM_REG(bp) - CFI_REL_OFFSET __ASM_REG(bp), 0 + __ASM_SIZE(push,) %__ASM_REG(bp) __ASM_SIZE(mov) %__ASM_REG(sp), %__ASM_REG(bp) .endm .macro ENDFRAME - __ASM_SIZE(pop,_cfi) %__ASM_REG(bp) - CFI_RESTORE __ASM_REG(bp) + __ASM_SIZE(pop,) %__ASM_REG(bp) .endm #else .macro FRAME diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S index 1c309763e321..0ac73de925d1 100644 --- a/arch/x86/kernel/entry_32.S +++ b/arch/x86/kernel/entry_32.S @@ -50,7 +50,6 @@ #include <asm/smp.h> #include <asm/page_types.h> #include <asm/percpu.h> -#include <asm/dwarf2.h> #include <asm/processor-flags.h> #include <asm/ftrace.h> #include <asm/irq_vectors.h> @@ -113,11 +112,10 @@ /* unfortunately push/pop can't be no-op */ .macro PUSH_GS - pushl_cfi $0 + pushl $0 .endm .macro POP_GS pop=0 addl $(4 + \pop), %esp - CFI_ADJUST_CFA_OFFSET -(4 + \pop) .endm .macro POP_GS_EX .endm @@ -137,16 +135,13 @@ #else /* CONFIG_X86_32_LAZY_GS */ .macro PUSH_GS - pushl_cfi %gs - /*CFI_REL_OFFSET gs, 0*/ + pushl %gs .endm .macro POP_GS pop=0 -98: popl_cfi %gs - /*CFI_RESTORE gs*/ +98: popl %gs .if \pop <> 0 add $\pop, %esp - CFI_ADJUST_CFA_OFFSET -\pop .endif .endm .macro POP_GS_EX @@ -170,11 +165,9 @@ .macro GS_TO_REG reg movl %gs, \reg - /*CFI_REGISTER gs, \reg*/ .endm .macro REG_TO_PTGS reg movl \reg, PT_GS(%esp) - /*CFI_REL_OFFSET gs, PT_GS*/ .endm .macro SET_KERNEL_GS reg movl $(__KERNEL_STACK_CANARY), \reg @@ -186,26 +179,16 @@ .macro SAVE_ALL cld PUSH_GS - pushl_cfi %fs - /*CFI_REL_OFFSET fs, 0;*/ - pushl_cfi %es - /*CFI_REL_OFFSET es, 0;*/ - pushl_cfi %ds - /*CFI_REL_OFFSET ds, 0;*/ - pushl_cfi %eax - CFI_REL_OFFSET eax, 0 - pushl_cfi %ebp - CFI_REL_OFFSET ebp, 0 - pushl_cfi %edi - CFI_REL_OFFSET edi, 0 - pushl_cfi %esi - CFI_REL_OFFSET esi, 0 - pushl_cfi %edx - CFI_REL_OFFSET edx, 0 - pushl_cfi %ecx - CFI_REL_OFFSET ecx, 0 - pushl_cfi %ebx - CFI_REL_OFFSET ebx, 0 + pushl %fs + pushl %es + pushl %ds + pushl %eax + pushl %ebp + pushl %edi + pushl %esi + pushl %edx + pushl %ecx + pushl %ebx movl $(__USER_DS), %edx movl %edx, %ds movl %edx, %es @@ -215,30 +198,20 @@ .endm .macro RESTORE_INT_REGS - popl_cfi %ebx - CFI_RESTORE ebx - popl_cfi %ecx - CFI_RESTORE ecx - popl_cfi %edx - CFI_RESTORE edx - popl_cfi %esi - CFI_RESTORE esi - popl_cfi %edi - CFI_RESTORE edi - popl_cfi %ebp - CFI_RESTORE ebp - popl_cfi %eax - CFI_RESTORE eax + popl %ebx + popl %ecx + popl %edx + popl %esi + popl %edi + popl %ebp + popl %eax .endm .macro RESTORE_REGS pop=0 RESTORE_INT_REGS -1: popl_cfi %ds - /*CFI_RESTORE ds;*/ -2: popl_cfi %es - /*CFI_RESTORE es;*/ -3: popl_cfi %fs - /*CFI_RESTORE fs;*/ +1: popl %ds +2: popl %es +3: popl %fs POP_GS \pop .pushsection .fixup, "ax" 4: movl $0, (%esp) @@ -254,64 +227,27 @@ POP_GS_EX .endm -.macro RING0_INT_FRAME - CFI_STARTPROC simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA esp, 3*4 - /*CFI_OFFSET cs, -2*4;*/ - CFI_OFFSET eip, -3*4 -.endm - -.macro RING0_EC_FRAME - CFI_STARTPROC simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA esp, 4*4 - /*CFI_OFFSET cs, -2*4;*/ - CFI_OFFSET eip, -3*4 -.endm - -.macro RING0_PTREGS_FRAME - CFI_STARTPROC simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA esp, PT_OLDESP-PT_EBX - /*CFI_OFFSET cs, PT_CS-PT_OLDESP;*/ - CFI_OFFSET eip, PT_EIP-PT_OLDESP - /*CFI_OFFSET es, PT_ES-PT_OLDESP;*/ - /*CFI_OFFSET ds, PT_DS-PT_OLDESP;*/ - CFI_OFFSET eax, PT_EAX-PT_OLDESP - CFI_OFFSET ebp, PT_EBP-PT_OLDESP - CFI_OFFSET edi, PT_EDI-PT_OLDESP - CFI_OFFSET esi, PT_ESI-PT_OLDESP - CFI_OFFSET edx, PT_EDX-PT_OLDESP - CFI_OFFSET ecx, PT_ECX-PT_OLDESP - CFI_OFFSET ebx, PT_EBX-PT_OLDESP -.endm - ENTRY(ret_from_fork) - CFI_STARTPROC - pushl_cfi %eax + pushl %eax call schedule_tail GET_THREAD_INFO(%ebp) - popl_cfi %eax - pushl_cfi $0x0202 # Reset kernel eflags - popfl_cfi + popl %eax + pushl $0x0202 # Reset kernel eflags + popfl jmp syscall_exit - CFI_ENDPROC END(ret_from_fork) ENTRY(ret_from_kernel_thread) - CFI_STARTPROC - pushl_cfi %eax + pushl %eax call schedule_tail GET_THREAD_INFO(%ebp) - popl_cfi %eax - pushl_cfi $0x0202 # Reset kernel eflags - popfl_cfi + popl %eax + pushl $0x0202 # Reset kernel eflags + popfl movl PT_EBP(%esp),%eax call *PT_EBX(%esp) movl $0,PT_EAX(%esp) jmp syscall_exit - CFI_ENDPROC ENDPROC(ret_from_kernel_thread) /* @@ -323,7 +259,6 @@ ENDPROC(ret_from_kernel_thread) # userspace resumption stub bypassing syscall exit tracing ALIGN - RING0_PTREGS_FRAME ret_from_exception: preempt_stop(CLBR_ANY) ret_from_intr: @@ -367,17 +302,12 @@ need_resched: jmp need_resched END(resume_kernel) #endif - CFI_ENDPROC /* SYSENTER_RETURN points to after the "sysenter" instruction in the vsyscall page. See vsyscall-sysentry.S, which defines the symbol. */ # sysenter call handler stub ENTRY(ia32_sysenter_target) - CFI_STARTPROC simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA esp, 0 - CFI_REGISTER esp, ebp movl TSS_sysenter_sp0(%esp),%esp sysenter_past_esp: /* @@ -385,14 +315,11 @@ sysenter_past_esp: * enough kernel state to call TRACE_IRQS_OFF can be called - but * we immediately enable interrupts at that point anyway. */ - pushl_cfi $__USER_DS - /*CFI_REL_OFFSET ss, 0*/ - pushl_cfi %ebp - CFI_REL_OFFSET esp, 0 - pushfl_cfi + pushl $__USER_DS + pushl %ebp + pushfl orl $X86_EFLAGS_IF, (%esp) - pushl_cfi $__USER_CS - /*CFI_REL_OFFSET cs, 0*/ + pushl $__USER_CS /* * Push current_thread_info()->sysenter_return to the stack. * A tiny bit of offset fixup is necessary: TI_sysenter_return @@ -401,10 +328,9 @@ sysenter_past_esp: * TOP_OF_KERNEL_STACK_PADDING takes us to the top of the stack; * and THREAD_SIZE takes us to the bottom. */ - pushl_cfi ((TI_sysenter_return) - THREAD_SIZE + TOP_OF_KERNEL_STACK_PADDING + 4*4)(%esp) - CFI_REL_OFFSET eip, 0 + pushl ((TI_sysenter_return) - THREAD_SIZE + TOP_OF_KERNEL_STACK_PADDING + 4*4)(%esp) - pushl_cfi %eax + pushl %eax SAVE_ALL ENABLE_INTERRUPTS(CLBR_NONE) @@ -453,11 +379,11 @@ sysenter_audit: /* movl PT_EAX(%esp), %eax already set, syscall number: 1st arg to audit */ movl PT_EBX(%esp), %edx /* ebx/a0: 2nd arg to audit */ /* movl PT_ECX(%esp), %ecx already set, a1: 3nd arg to audit */ - pushl_cfi PT_ESI(%esp) /* a3: 5th arg */ - pushl_cfi PT_EDX+4(%esp) /* a2: 4th arg */ + pushl PT_ESI(%esp) /* a3: 5th arg */ + pushl PT_EDX+4(%esp) /* a2: 4th arg */ call __audit_syscall_entry - popl_cfi %ecx /* get that remapped edx off the stack */ - popl_cfi %ecx /* get that remapped esi off the stack */ + popl %ecx /* get that remapped edx off the stack */ + popl %ecx /* get that remapped esi off the stack */ movl PT_EAX(%esp),%eax /* reload syscall number */ jmp sysenter_do_call @@ -480,7 +406,6 @@ sysexit_audit: jmp sysenter_exit #endif - CFI_ENDPROC .pushsection .fixup,"ax" 2: movl $0,PT_FS(%esp) jmp 1b @@ -491,9 +416,8 @@ ENDPROC(ia32_sysenter_target) # system call handler stub ENTRY(system_call) - RING0_INT_FRAME # can't unwind into user space anyway ASM_CLAC - pushl_cfi %eax # save orig_eax + pushl %eax # save orig_eax SAVE_ALL GET_THREAD_INFO(%ebp) # system call tracing in operation / emulation @@ -527,7 +451,6 @@ restore_all_notrace: movb PT_CS(%esp), %al andl $(X86_EFLAGS_VM | (SEGMENT_TI_MASK << 8) | SEGMENT_RPL_MASK), %eax cmpl $((SEGMENT_LDT << 8) | USER_RPL), %eax - CFI_REMEMBER_STATE je ldt_ss # returning to user-space with LDT SS #endif restore_nocheck: @@ -543,7 +466,6 @@ ENTRY(iret_exc) _ASM_EXTABLE(irq_return,iret_exc) #ifdef CONFIG_X86_ESPFIX32 - CFI_RESTORE_STATE ldt_ss: #ifdef CONFIG_PARAVIRT /* @@ -577,22 +499,19 @@ ldt_ss: shr $16, %edx mov %dl, GDT_ESPFIX_SS + 4 /* bits 16..23 */ mov %dh, GDT_ESPFIX_SS + 7 /* bits 24..31 */ - pushl_cfi $__ESPFIX_SS - pushl_cfi %eax /* new kernel esp */ + pushl $__ESPFIX_SS + pushl %eax /* new kernel esp */ /* Disable interrupts, but do not irqtrace this section: we * will soon execute iret and the tracer was already set to * the irqstate after the iret */ DISABLE_INTERRUPTS(CLBR_EAX) lss (%esp), %esp /* switch to espfix segment */ - CFI_ADJUST_CFA_OFFSET -8 jmp restore_nocheck #endif - CFI_ENDPROC ENDPROC(system_call) # perform work that needs to be done immediately before resumption ALIGN - RING0_PTREGS_FRAME # can't unwind into user space anyway work_pending: testb $_TIF_NEED_RESCHED, %cl jz work_notifysig @@ -634,9 +553,9 @@ work_notifysig: # deal with pending signals and #ifdef CONFIG_VM86 ALIGN work_notifysig_v86: - pushl_cfi %ecx # save ti_flags for do_notify_resume + pushl %ecx # save ti_flags for do_notify_resume call save_v86_state # %eax contains pt_regs pointer - popl_cfi %ecx + popl %ecx movl %eax, %esp jmp 1b #endif @@ -666,9 +585,7 @@ syscall_exit_work: call syscall_trace_leave jmp resume_userspace END(syscall_exit_work) - CFI_ENDPROC - RING0_INT_FRAME # can't unwind into user space anyway syscall_fault: ASM_CLAC GET_THREAD_INFO(%ebp) @@ -685,7 +602,6 @@ sysenter_badsys: movl $-ENOSYS,%eax jmp sysenter_after_call END(sysenter_badsys) - CFI_ENDPROC .macro FIXUP_ESPFIX_STACK /* @@ -701,10 +617,9 @@ END(sysenter_badsys) mov GDT_ESPFIX_SS + 7, %ah /* bits 24..31 */ shl $16, %eax addl %esp, %eax /* the adjusted stack pointer */ - pushl_cfi $__KERNEL_DS - pushl_cfi %eax + pushl $__KERNEL_DS + pushl %eax lss (%esp), %esp /* switch to the normal stack segment */ - CFI_ADJUST_CFA_OFFSET -8 #endif .endm .macro UNWIND_ESPFIX_STACK @@ -728,13 +643,11 @@ END(sysenter_badsys) */ .align 8 ENTRY(irq_entries_start) - RING0_INT_FRAME vector=FIRST_EXTERNAL_VECTOR .rept (FIRST_SYSTEM_VECTOR - FIRST_EXTERNAL_VECTOR) - pushl_cfi $(~vector+0x80) /* Note: always in signed byte range */ + pushl $(~vector+0x80) /* Note: always in signed byte range */ vector=vector+1 jmp common_interrupt - CFI_ADJUST_CFA_OFFSET -4 .align 8 .endr END(irq_entries_start) @@ -753,19 +666,16 @@ common_interrupt: call do_IRQ jmp ret_from_intr ENDPROC(common_interrupt) - CFI_ENDPROC #define BUILD_INTERRUPT3(name, nr, fn) \ ENTRY(name) \ - RING0_INT_FRAME; \ ASM_CLAC; \ - pushl_cfi $~(nr); \ + pushl $~(nr); \ SAVE_ALL; \ TRACE_IRQS_OFF \ movl %esp,%eax; \ call fn; \ jmp ret_from_intr; \ - CFI_ENDPROC; \ ENDPROC(name) @@ -784,37 +694,31 @@ ENDPROC(name) #include <asm/entry_arch.h> ENTRY(coprocessor_error) - RING0_INT_FRAME ASM_CLAC - pushl_cfi $0 - pushl_cfi $do_coprocessor_error + pushl $0 + pushl $do_coprocessor_error jmp error_code - CFI_ENDPROC END(coprocessor_error) ENTRY(simd_coprocessor_error) - RING0_INT_FRAME ASM_CLAC - pushl_cfi $0 + pushl $0 #ifdef CONFIG_X86_INVD_BUG /* AMD 486 bug: invd from userspace calls exception 19 instead of #GP */ - ALTERNATIVE "pushl_cfi $do_general_protection", \ + ALTERNATIVE "pushl $do_general_protection", \ "pushl $do_simd_coprocessor_error", \ X86_FEATURE_XMM #else - pushl_cfi $do_simd_coprocessor_error + pushl $do_simd_coprocessor_error #endif jmp error_code - CFI_ENDPROC END(simd_coprocessor_error) ENTRY(device_not_available) - RING0_INT_FRAME ASM_CLAC - pushl_cfi $-1 # mark this as an int - pushl_cfi $do_device_not_available + pushl $-1 # mark this as an int + pushl $do_device_not_available jmp error_code - CFI_ENDPROC END(device_not_available) #ifdef CONFIG_PARAVIRT @@ -830,115 +734,89 @@ END(native_irq_enable_sysexit) #endif ENTRY(overflow) - RING0_INT_FRAME ASM_CLAC - pushl_cfi $0 - pushl_cfi $do_overflow + pushl $0 + pushl $do_overflow jmp error_code - CFI_ENDPROC END(overflow) ENTRY(bounds) - RING0_INT_FRAME ASM_CLAC - pushl_cfi $0 - pushl_cfi $do_bounds + pushl $0 + pushl $do_bounds jmp error_code - CFI_ENDPROC END(bounds) ENTRY(invalid_op) - RING0_INT_FRAME ASM_CLAC - pushl_cfi $0 - pushl_cfi $do_invalid_op + pushl $0 + pushl $do_invalid_op jmp error_code - CFI_ENDPROC END(invalid_op) ENTRY(coprocessor_segment_overrun) - RING0_INT_FRAME ASM_CLAC - pushl_cfi $0 - pushl_cfi $do_coprocessor_segment_overrun + pushl $0 + pushl $do_coprocessor_segment_overrun jmp error_code - CFI_ENDPROC END(coprocessor_segment_overrun) ENTRY(invalid_TSS) - RING0_EC_FRAME ASM_CLAC - pushl_cfi $do_invalid_TSS + pushl $do_invalid_TSS jmp error_code - CFI_ENDPROC END(invalid_TSS) ENTRY(segment_not_present) - RING0_EC_FRAME ASM_CLAC - pushl_cfi $do_segment_not_present + pushl $do_segment_not_present jmp error_code - CFI_ENDPROC END(segment_not_present) ENTRY(stack_segment) - RING0_EC_FRAME ASM_CLAC - pushl_cfi $do_stack_segment + pushl $do_stack_segment jmp error_code - CFI_ENDPROC END(stack_segment) ENTRY(alignment_check) - RING0_EC_FRAME ASM_CLAC - pushl_cfi $do_alignment_check + pushl $do_alignment_check jmp error_code - CFI_ENDPROC END(alignment_check) ENTRY(divide_error) - RING0_INT_FRAME ASM_CLAC - pushl_cfi $0 # no error code - pushl_cfi $do_divide_error + pushl $0 # no error code + pushl $do_divide_error jmp error_code - CFI_ENDPROC END(divide_error) #ifdef CONFIG_X86_MCE ENTRY(machine_check) - RING0_INT_FRAME ASM_CLAC - pushl_cfi $0 - pushl_cfi machine_check_vector + pushl $0 + pushl machine_check_vector jmp error_code - CFI_ENDPROC END(machine_check) #endif ENTRY(spurious_interrupt_bug) - RING0_INT_FRAME ASM_CLAC - pushl_cfi $0 - pushl_cfi $do_spurious_interrupt_bug + pushl $0 + pushl $do_spurious_interrupt_bug jmp error_code - CFI_ENDPROC END(spurious_interrupt_bug) #ifdef CONFIG_XEN /* Xen doesn't set %esp to be precisely what the normal sysenter entrypoint expects, so fix it up before using the normal path. */ ENTRY(xen_sysenter_target) - RING0_INT_FRAME addl $5*4, %esp /* remove xen-provided frame */ - CFI_ADJUST_CFA_OFFSET -5*4 jmp sysenter_past_esp - CFI_ENDPROC ENTRY(xen_hypervisor_callback) - CFI_STARTPROC - pushl_cfi $-1 /* orig_ax = -1 => not a system call */ + pushl $-1 /* orig_ax = -1 => not a system call */ SAVE_ALL TRACE_IRQS_OFF @@ -962,7 +840,6 @@ ENTRY(xen_do_upcall) call xen_maybe_preempt_hcall #endif jmp ret_from_intr - CFI_ENDPROC ENDPROC(xen_hypervisor_callback) # Hypervisor uses this for application faults while it executes. @@ -976,8 +853,7 @@ ENDPROC(xen_hypervisor_callback) # to pop the stack frame we end up in an infinite loop of failsafe callbacks. # We distinguish between categories by maintaining a status value in EAX. ENTRY(xen_failsafe_callback) - CFI_STARTPROC - pushl_cfi %eax + pushl %eax movl $1,%eax 1: mov 4(%esp),%ds 2: mov 8(%esp),%es @@ -986,15 +862,13 @@ ENTRY(xen_failsafe_callback) /* EAX == 0 => Category 1 (Bad segment) EAX != 0 => Category 2 (Bad IRET) */ testl %eax,%eax - popl_cfi %eax + popl %eax lea 16(%esp),%esp - CFI_ADJUST_CFA_OFFSET -16 jz 5f jmp iret_exc -5: pushl_cfi $-1 /* orig_ax = -1 => not a system call */ +5: pushl $-1 /* orig_ax = -1 => not a system call */ SAVE_ALL jmp ret_from_exception - CFI_ENDPROC .section .fixup,"ax" 6: xorl %eax,%eax @@ -1195,34 +1069,28 @@ return_to_handler: #ifdef CONFIG_TRACING ENTRY(trace_page_fault) - RING0_EC_FRAME ASM_CLAC - pushl_cfi $trace_do_page_fault + pushl $trace_do_page_fault jmp error_code - CFI_ENDPROC END(trace_page_fault) #endif ENTRY(page_fault) - RING0_EC_FRAME ASM_CLAC - pushl_cfi $do_page_fault + pushl $do_page_fault ALIGN error_code: /* the function address is in %gs's slot on the stack */ - pushl_cfi %fs - /*CFI_REL_OFFSET fs, 0*/ - pushl_cfi %es - /*CFI_REL_OFFSET es, 0*/ - pushl_cfi %ds - /*CFI_REL_OFFSET ds, 0*/ - pushl_cfi_reg eax - pushl_cfi_reg ebp - pushl_cfi_reg edi - pushl_cfi_reg esi - pushl_cfi_reg edx - pushl_cfi_reg ecx - pushl_cfi_reg ebx + pushl %fs + pushl %es + pushl %ds + pushl %eax + pushl %ebp + pushl %edi + pushl %esi + pushl %edx + pushl %ecx + pushl %ebx cld movl $(__KERNEL_PERCPU), %ecx movl %ecx, %fs @@ -1240,7 +1108,6 @@ error_code: movl %esp,%eax # pt_regs pointer call *%edi jmp ret_from_exception - CFI_ENDPROC END(page_fault) /* @@ -1261,29 +1128,24 @@ END(page_fault) jne \ok \label: movl TSS_sysenter_sp0 + \offset(%esp), %esp - CFI_DEF_CFA esp, 0 - CFI_UNDEFINED eip - pushfl_cfi - pushl_cfi $__KERNEL_CS - pushl_cfi $sysenter_past_esp - CFI_REL_OFFSET eip, 0 + pushfl + pushl $__KERNEL_CS + pushl $sysenter_past_esp .endm ENTRY(debug) - RING0_INT_FRAME ASM_CLAC cmpl $ia32_sysenter_target,(%esp) jne debug_stack_correct FIX_STACK 12, debug_stack_correct, debug_esp_fix_insn debug_stack_correct: - pushl_cfi $-1 # mark this as an int + pushl $-1 # mark this as an int SAVE_ALL TRACE_IRQS_OFF xorl %edx,%edx # error code 0 movl %esp,%eax # pt_regs pointer call do_debug jmp ret_from_exception - CFI_ENDPROC END(debug) /* @@ -1295,45 +1157,40 @@ END(debug) * fault happened on the sysenter path. */ ENTRY(nmi) - RING0_INT_FRAME ASM_CLAC #ifdef CONFIG_X86_ESPFIX32 - pushl_cfi %eax + pushl %eax movl %ss, %eax cmpw $__ESPFIX_SS, %ax - popl_cfi %eax + popl %eax je nmi_espfix_stack #endif cmpl $ia32_sysenter_target,(%esp) je nmi_stack_fixup - pushl_cfi %eax + pushl %eax movl %esp,%eax /* Do not access memory above the end of our stack page, * it might not exist. */ andl $(THREAD_SIZE-1),%eax cmpl $(THREAD_SIZE-20),%eax - popl_cfi %eax + popl %eax jae nmi_stack_correct cmpl $ia32_sysenter_target,12(%esp) je nmi_debug_stack_check nmi_stack_correct: - /* We have a RING0_INT_FRAME here */ - pushl_cfi %eax + pushl %eax SAVE_ALL xorl %edx,%edx # zero error code movl %esp,%eax # pt_regs pointer call do_nmi jmp restore_all_notrace - CFI_ENDPROC nmi_stack_fixup: - RING0_INT_FRAME FIX_STACK 12, nmi_stack_correct, 1 jmp nmi_stack_correct nmi_debug_stack_check: - /* We have a RING0_INT_FRAME here */ cmpw $__KERNEL_CS,16(%esp) jne nmi_stack_correct cmpl $debug,(%esp) @@ -1345,57 +1202,48 @@ nmi_debug_stack_check: #ifdef CONFIG_X86_ESPFIX32 nmi_espfix_stack: - /* We have a RING0_INT_FRAME here. - * + /* * create the pointer to lss back */ - pushl_cfi %ss - pushl_cfi %esp + pushl %ss + pushl %esp addl $4, (%esp) /* copy the iret frame of 12 bytes */ .rept 3 - pushl_cfi 16(%esp) + pushl 16(%esp) .endr - pushl_cfi %eax + pushl %eax SAVE_ALL FIXUP_ESPFIX_STACK # %eax == %esp xorl %edx,%edx # zero error code call do_nmi RESTORE_REGS lss 12+4(%esp), %esp # back to espfix stack - CFI_ADJUST_CFA_OFFSET -24 jmp irq_return #endif - CFI_ENDPROC END(nmi) ENTRY(int3) - RING0_INT_FRAME ASM_CLAC - pushl_cfi $-1 # mark this as an int + pushl $-1 # mark this as an int SAVE_ALL TRACE_IRQS_OFF xorl %edx,%edx # zero error code movl %esp,%eax # pt_regs pointer call do_int3 jmp ret_from_exception - CFI_ENDPROC END(int3) ENTRY(general_protection) - RING0_EC_FRAME - pushl_cfi $do_general_protection + pushl $do_general_protection jmp error_code - CFI_ENDPROC END(general_protection) #ifdef CONFIG_KVM_GUEST ENTRY(async_page_fault) - RING0_EC_FRAME ASM_CLAC - pushl_cfi $do_async_page_fault + pushl $do_async_page_fault jmp error_code - CFI_ENDPROC END(async_page_fault) #endif diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 47b95813dc37..b84cec50c8cf 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -19,8 +19,6 @@ * at the top of the kernel process stack. * * Some macro usage: - * - CFI macros are used to generate dwarf2 unwind information for better - * backtraces. They don't change any code. * - ENTRY/END Define functions in the symbol table. * - TRACE_IRQ_* - Trace hard interrupt state for lock debugging. * - idtentry - Define exception entry points. @@ -30,7 +28,6 @@ #include <asm/segment.h> #include <asm/cache.h> #include <asm/errno.h> -#include <asm/dwarf2.h> #include <asm/calling.h> #include <asm/asm-offsets.h> #include <asm/msr.h> @@ -113,61 +110,6 @@ ENDPROC(native_usergs_sysret64) #endif /* - * empty frame - */ - .macro EMPTY_FRAME start=1 offset=0 - .if \start - CFI_STARTPROC simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA rsp,8+\offset - .else - CFI_DEF_CFA_OFFSET 8+\offset - .endif - .endm - -/* - * initial frame state for interrupts (and exceptions without error code) - */ - .macro INTR_FRAME start=1 offset=0 - EMPTY_FRAME \start, 5*8+\offset - /*CFI_REL_OFFSET ss, 4*8+\offset*/ - CFI_REL_OFFSET rsp, 3*8+\offset - /*CFI_REL_OFFSET rflags, 2*8+\offset*/ - /*CFI_REL_OFFSET cs, 1*8+\offset*/ - CFI_REL_OFFSET rip, 0*8+\offset - .endm - -/* - * initial frame state for exceptions with error code (and interrupts - * with vector already pushed) - */ - .macro XCPT_FRAME start=1 offset=0 - INTR_FRAME \start, 1*8+\offset - .endm - -/* - * frame that enables passing a complete pt_regs to a C function. - */ - .macro DEFAULT_FRAME start=1 offset=0 - XCPT_FRAME \start, ORIG_RAX+\offset - CFI_REL_OFFSET rdi, RDI+\offset - CFI_REL_OFFSET rsi, RSI+\offset - CFI_REL_OFFSET rdx, RDX+\offset - CFI_REL_OFFSET rcx, RCX+\offset - CFI_REL_OFFSET rax, RAX+\offset - CFI_REL_OFFSET r8, R8+\offset - CFI_REL_OFFSET r9, R9+\offset - CFI_REL_OFFSET r10, R10+\offset - CFI_REL_OFFSET r11, R11+\offset - CFI_REL_OFFSET rbx, RBX+\offset - CFI_REL_OFFSET rbp, RBP+\offset - CFI_REL_OFFSET r12, R12+\offset - CFI_REL_OFFSET r13, R13+\offset - CFI_REL_OFFSET r14, R14+\offset - CFI_REL_OFFSET r15, R15+\offset - .endm - -/* * 64bit SYSCALL instruction entry. Up to 6 arguments in registers. * * 64bit SYSCALL saves rip to rcx, clears rflags.RF, then saves rflags to r11, @@ -196,12 +138,6 @@ ENDPROC(native_usergs_sysret64) */ ENTRY(system_call) - CFI_STARTPROC simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA rsp,0 - CFI_REGISTER rip,rcx - /*CFI_REGISTER rflags,r11*/ - /* * Interrupts are off on entry. * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON, @@ -219,8 +155,8 @@ GLOBAL(system_call_after_swapgs) movq PER_CPU_VAR(cpu_current_top_of_stack),%rsp /* Construct struct pt_regs on stack */ - pushq_cfi $__USER_DS /* pt_regs->ss */ - pushq_cfi PER_CPU_VAR(rsp_scratch) /* pt_regs->sp */ + pushq $__USER_DS /* pt_regs->ss */ + pushq PER_CPU_VAR(rsp_scratch) /* pt_regs->sp */ /* * Re-enable interrupts. * We use 'rsp_scratch' as a scratch space, hence irq-off block above @@ -229,22 +165,20 @@ GLOBAL(system_call_after_swapgs) * with using rsp_scratch: */ ENABLE_INTERRUPTS(CLBR_NONE) - pushq_cfi %r11 /* pt_regs->flags */ - pushq_cfi $__USER_CS /* pt_regs->cs */ - pushq_cfi %rcx /* pt_regs->ip */ - CFI_REL_OFFSET rip,0 - pushq_cfi_reg rax /* pt_regs->orig_ax */ - pushq_cfi_reg rdi /* pt_regs->di */ - pushq_cfi_reg rsi /* pt_regs->si */ - pushq_cfi_reg rdx /* pt_regs->dx */ - pushq_cfi_reg rcx /* pt_regs->cx */ - pushq_cfi $-ENOSYS /* pt_regs->ax */ - pushq_cfi_reg r8 /* pt_regs->r8 */ - pushq_cfi_reg r9 /* pt_regs->r9 */ - pushq_cfi_reg r10 /* pt_regs->r10 */ - pushq_cfi_reg r11 /* pt_regs->r11 */ + pushq %r11 /* pt_regs->flags */ + pushq $__USER_CS /* pt_regs->cs */ + pushq %rcx /* pt_regs->ip */ + pushq %rax /* pt_regs->orig_ax */ + pushq %rdi /* pt_regs->di */ + pushq %rsi /* pt_regs->si */ + pushq %rdx /* pt_regs->dx */ + pushq %rcx /* pt_regs->cx */ + pushq $-ENOSYS /* pt_regs->ax */ + pushq %r8 /* pt_regs->r8 */ + pushq %r9 /* pt_regs->r9 */ + pushq %r10 /* pt_regs->r10 */ + pushq %r11 /* pt_regs->r11 */ sub $(6*8),%rsp /* pt_regs->bp,bx,r12-15 not saved */ - CFI_ADJUST_CFA_OFFSET 6*8 testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) jnz tracesys @@ -282,13 +216,9 @@ system_call_fastpath: testl $_TIF_ALLWORK_MASK, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) jnz int_ret_from_sys_call_irqs_off /* Go to the slow path */ - CFI_REMEMBER_STATE - RESTORE_C_REGS_EXCEPT_RCX_R11 movq RIP(%rsp),%rcx - CFI_REGISTER rip,rcx movq EFLAGS(%rsp),%r11 - /*CFI_REGISTER rflags,r11*/ movq RSP(%rsp),%rsp /* * 64bit SYSRET restores rip from rcx, @@ -307,8 +237,6 @@ system_call_fastpath: */ USERGS_SYSRET64 - CFI_RESTORE_STATE - /* Do syscall entry tracing */ tracesys: movq %rsp, %rdi @@ -374,9 +302,9 @@ int_careful: jnc int_very_careful TRACE_IRQS_ON ENABLE_INTERRUPTS(CLBR_NONE) - pushq_cfi %rdi + pushq %rdi SCHEDULE_USER - popq_cfi %rdi + popq %rdi DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF jmp int_with_check @@ -389,10 +317,10 @@ int_very_careful: /* Check for syscall exit trace */ testl $_TIF_WORK_SYSCALL_EXIT,%edx jz int_signal - pushq_cfi %rdi + pushq %rdi leaq 8(%rsp),%rdi # &ptregs -> arg1 call syscall_trace_leave - popq_cfi %rdi + popq %rdi andl $~(_TIF_WORK_SYSCALL_EXIT|_TIF_SYSCALL_EMU),%edi jmp int_restore_rest @@ -475,27 +403,21 @@ syscall_return: * perf profiles. Nothing jumps here. */ syscall_return_via_sysret: - CFI_REMEMBER_STATE /* rcx and r11 are already restored (see code above) */ RESTORE_C_REGS_EXCEPT_RCX_R11 movq RSP(%rsp),%rsp USERGS_SYSRET64 - CFI_RESTORE_STATE opportunistic_sysret_failed: SWAPGS jmp restore_c_regs_and_iret - CFI_ENDPROC END(system_call) .macro FORK_LIKE func ENTRY(stub_\func) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 /* offset 8: return address */ SAVE_EXTRA_REGS 8 jmp sys_\func - CFI_ENDPROC END(stub_\func) .endm @@ -504,8 +426,6 @@ END(stub_\func) FORK_LIKE vfork ENTRY(stub_execve) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 call sys_execve return_from_execve: testl %eax, %eax @@ -515,11 +435,9 @@ return_from_execve: 1: /* must use IRET code path (pt_regs->cs may have changed) */ addq $8, %rsp - CFI_ADJUST_CFA_OFFSET -8 ZERO_EXTRA_REGS movq %rax,RAX(%rsp) jmp int_ret_from_sys_call - CFI_ENDPROC END(stub_execve) /* * Remaining execve stubs are only 7 bytes long. @@ -527,32 +445,23 @@ END(stub_execve) */ .align 8 GLOBAL(stub_execveat) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 call sys_execveat jmp return_from_execve - CFI_ENDPROC END(stub_execveat) #if defined(CONFIG_X86_X32_ABI) || defined(CONFIG_IA32_EMULATION) .align 8 GLOBAL(stub_x32_execve) GLOBAL(stub32_execve) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 call compat_sys_execve jmp return_from_execve - CFI_ENDPROC END(stub32_execve) END(stub_x32_execve) .align 8 GLOBAL(stub_x32_execveat) GLOBAL(stub32_execveat) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 call compat_sys_execveat jmp return_from_execve - CFI_ENDPROC END(stub32_execveat) END(stub_x32_execveat) #endif @@ -562,8 +471,6 @@ END(stub_x32_execveat) * This cannot be done with SYSRET, so use the IRET return path instead. */ ENTRY(stub_rt_sigreturn) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 /* * SAVE_EXTRA_REGS result is not normally needed: * sigreturn overwrites all pt_regs->GPREGS. @@ -575,21 +482,16 @@ ENTRY(stub_rt_sigreturn) call sys_rt_sigreturn return_from_stub: addq $8, %rsp - CFI_ADJUST_CFA_OFFSET -8 RESTORE_EXTRA_REGS movq %rax,RAX(%rsp) jmp int_ret_from_sys_call - CFI_ENDPROC END(stub_rt_sigreturn) #ifdef CONFIG_X86_X32_ABI ENTRY(stub_x32_rt_sigreturn) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 SAVE_EXTRA_REGS 8 call sys32_x32_rt_sigreturn jmp return_from_stub - CFI_ENDPROC END(stub_x32_rt_sigreturn) #endif @@ -599,12 +501,11 @@ END(stub_x32_rt_sigreturn) * rdi: prev task we switched from */ ENTRY(ret_from_fork) - DEFAULT_FRAME LOCK ; btr $TIF_FORK,TI_flags(%r8) - pushq_cfi $0x0002 - popfq_cfi # reset kernel eflags + pushq $0x0002 + popfq # reset kernel eflags call schedule_tail # rdi: 'prev' task parameter @@ -628,7 +529,6 @@ ENTRY(ret_from_fork) movl $0, RAX(%rsp) RESTORE_EXTRA_REGS jmp int_ret_from_sys_call - CFI_ENDPROC END(ret_from_fork) /* @@ -637,16 +537,13 @@ END(ret_from_fork) */ .align 8 ENTRY(irq_entries_start) - INTR_FRAME vector=FIRST_EXTERNAL_VECTOR .rept (FIRST_SYSTEM_VECTOR - FIRST_EXTERNAL_VECTOR) - pushq_cfi $(~vector+0x80) /* Note: always in signed byte range */ + pushq $(~vector+0x80) /* Note: always in signed byte range */ vector=vector+1 jmp common_interrupt - CFI_ADJUST_CFA_OFFSET -8 .align 8 .endr - CFI_ENDPROC END(irq_entries_start) /* @@ -688,17 +585,7 @@ END(irq_entries_start) movq %rsp, %rsi incl PER_CPU_VAR(irq_count) cmovzq PER_CPU_VAR(irq_stack_ptr),%rsp - CFI_DEF_CFA_REGISTER rsi pushq %rsi - /* - * For debugger: - * "CFA (Current Frame Address) is the value on stack + offset" - */ - CFI_ESCAPE 0x0f /* DW_CFA_def_cfa_expression */, 6, \ - 0x77 /* DW_OP_breg7 (rsp) */, 0, \ - 0x06 /* DW_OP_deref */, \ - 0x08 /* DW_OP_const1u */, SIZEOF_PTREGS-RBP, \ - 0x22 /* DW_OP_plus */ /* We entered an interrupt context - irqs are off: */ TRACE_IRQS_OFF @@ -711,7 +598,6 @@ END(irq_entries_start) */ .p2align CONFIG_X86_L1_CACHE_SHIFT common_interrupt: - XCPT_FRAME ASM_CLAC addq $-0x80,(%rsp) /* Adjust vector to [-256,-1] range */ interrupt do_IRQ @@ -723,11 +609,8 @@ ret_from_intr: /* Restore saved previous stack */ popq %rsi - CFI_DEF_CFA rsi,SIZEOF_PTREGS-RBP /* reg/off reset after def_cfa_expr */ /* return code expects complete pt_regs - adjust rsp accordingly: */ leaq -RBP(%rsi),%rsp - CFI_DEF_CFA_REGISTER rsp - CFI_ADJUST_CFA_OFFSET RBP testb $3, CS(%rsp) jz retint_kernel @@ -743,7 +626,6 @@ retint_check: LOCKDEP_SYS_EXIT_IRQ movl TI_flags(%rcx),%edx andl %edi,%edx - CFI_REMEMBER_STATE jnz retint_careful retint_swapgs: /* return to user-space */ @@ -807,8 +689,8 @@ native_irq_return_iret: #ifdef CONFIG_X86_ESPFIX64 native_irq_return_ldt: - pushq_cfi %rax - pushq_cfi %rdi + pushq %rax + pushq %rdi SWAPGS movq PER_CPU_VAR(espfix_waddr),%rdi movq %rax,(0*8)(%rdi) /* RAX */ @@ -823,24 +705,23 @@ native_irq_return_ldt: movq (5*8)(%rsp),%rax /* RSP */ movq %rax,(4*8)(%rdi) andl $0xffff0000,%eax - popq_cfi %rdi + popq %rdi orq PER_CPU_VAR(espfix_stack),%rax SWAPGS movq %rax,%rsp - popq_cfi %rax + popq %rax jmp native_irq_return_iret #endif /* edi: workmask, edx: work */ retint_careful: - CFI_RESTORE_STATE bt $TIF_NEED_RESCHED,%edx jnc retint_signal TRACE_IRQS_ON ENABLE_INTERRUPTS(CLBR_NONE) - pushq_cfi %rdi + pushq %rdi SCHEDULE_USER - popq_cfi %rdi + popq %rdi GET_THREAD_INFO(%rcx) DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF @@ -862,7 +743,6 @@ retint_signal: GET_THREAD_INFO(%rcx) jmp retint_with_reschedule - CFI_ENDPROC END(common_interrupt) /* @@ -870,13 +750,11 @@ END(common_interrupt) */ .macro apicinterrupt3 num sym do_sym ENTRY(\sym) - INTR_FRAME ASM_CLAC - pushq_cfi $~(\num) + pushq $~(\num) .Lcommon_\sym: interrupt \do_sym jmp ret_from_intr - CFI_ENDPROC END(\sym) .endm @@ -959,24 +837,17 @@ ENTRY(\sym) .error "using shift_ist requires paranoid=1" .endif - .if \has_error_code - XCPT_FRAME - .else - INTR_FRAME - .endif - ASM_CLAC PARAVIRT_ADJUST_EXCEPTION_FRAME .ifeq \has_error_code - pushq_cfi $-1 /* ORIG_RAX: no syscall to restart */ + pushq $-1 /* ORIG_RAX: no syscall to restart */ .endif ALLOC_PT_GPREGS_ON_STACK .if \paranoid .if \paranoid == 1 - CFI_REMEMBER_STATE testb $3, CS(%rsp) /* If coming from userspace, switch */ jnz 1f /* stacks. */ .endif @@ -986,8 +857,6 @@ ENTRY(\sym) .endif /* returned flag: ebx=0: need swapgs on exit, ebx=1: don't need it */ - DEFAULT_FRAME 0 - .if \paranoid .if \shift_ist != -1 TRACE_IRQS_OFF_DEBUG /* reload IDT in case of recursion */ @@ -1023,7 +892,6 @@ ENTRY(\sym) .endif .if \paranoid == 1 - CFI_RESTORE_STATE /* * Paranoid entry from userspace. Switch stacks and treat it * as a normal entry. This means that paranoid handlers @@ -1032,7 +900,6 @@ ENTRY(\sym) 1: call error_entry - DEFAULT_FRAME 0 movq %rsp,%rdi /* pt_regs pointer */ call sync_regs @@ -1051,8 +918,6 @@ ENTRY(\sym) jmp error_exit /* %ebx: no swapgs flag */ .endif - - CFI_ENDPROC END(\sym) .endm @@ -1085,17 +950,15 @@ idtentry simd_coprocessor_error do_simd_coprocessor_error has_error_code=0 /* Reload gs selector with exception handling */ /* edi: new selector */ ENTRY(native_load_gs_index) - CFI_STARTPROC - pushfq_cfi + pushfq DISABLE_INTERRUPTS(CLBR_ANY & ~CLBR_RDI) SWAPGS gs_change: movl %edi,%gs 2: mfence /* workaround */ SWAPGS - popfq_cfi + popfq ret - CFI_ENDPROC END(native_load_gs_index) _ASM_EXTABLE(gs_change,bad_gs) @@ -1110,22 +973,15 @@ bad_gs: /* Call softirq on interrupt stack. Interrupts are off. */ ENTRY(do_softirq_own_stack) - CFI_STARTPROC - pushq_cfi %rbp - CFI_REL_OFFSET rbp,0 + pushq %rbp mov %rsp,%rbp - CFI_DEF_CFA_REGISTER rbp incl PER_CPU_VAR(irq_count) cmove PER_CPU_VAR(irq_stack_ptr),%rsp push %rbp # backlink for old unwinder call __do_softirq leaveq - CFI_RESTORE rbp - CFI_DEF_CFA_REGISTER rsp - CFI_ADJUST_CFA_OFFSET -8 decl PER_CPU_VAR(irq_count) ret - CFI_ENDPROC END(do_softirq_own_stack) #ifdef CONFIG_XEN @@ -1145,28 +1001,22 @@ idtentry xen_hypervisor_callback xen_do_hypervisor_callback has_error_code=0 * activation and restart the handler using the previous one. */ ENTRY(xen_do_hypervisor_callback) # do_hypervisor_callback(struct *pt_regs) - CFI_STARTPROC /* * Since we don't modify %rdi, evtchn_do_upall(struct *pt_regs) will * see the correct pointer to the pt_regs */ movq %rdi, %rsp # we don't return, adjust the stack frame - CFI_ENDPROC - DEFAULT_FRAME 11: incl PER_CPU_VAR(irq_count) movq %rsp,%rbp - CFI_DEF_CFA_REGISTER rbp cmovzq PER_CPU_VAR(irq_stack_ptr),%rsp pushq %rbp # backlink for old unwinder call xen_evtchn_do_upcall popq %rsp - CFI_DEF_CFA_REGISTER rsp decl PER_CPU_VAR(irq_count) #ifndef CONFIG_PREEMPT call xen_maybe_preempt_hcall #endif jmp error_exit - CFI_ENDPROC END(xen_do_hypervisor_callback) /* @@ -1183,16 +1033,8 @@ END(xen_do_hypervisor_callback) * with its current contents: any discrepancy means we in category 1. */ ENTRY(xen_failsafe_callback) - INTR_FRAME 1 (6*8) - /*CFI_REL_OFFSET gs,GS*/ - /*CFI_REL_OFFSET fs,FS*/ - /*CFI_REL_OFFSET es,ES*/ - /*CFI_REL_OFFSET ds,DS*/ - CFI_REL_OFFSET r11,8 - CFI_REL_OFFSET rcx,0 movl %ds,%ecx cmpw %cx,0x10(%rsp) - CFI_REMEMBER_STATE jne 1f movl %es,%ecx cmpw %cx,0x18(%rsp) @@ -1205,29 +1047,21 @@ ENTRY(xen_failsafe_callback) jne 1f /* All segments match their saved values => Category 2 (Bad IRET). */ movq (%rsp),%rcx - CFI_RESTORE rcx movq 8(%rsp),%r11 - CFI_RESTORE r11 addq $0x30,%rsp - CFI_ADJUST_CFA_OFFSET -0x30 - pushq_cfi $0 /* RIP */ - pushq_cfi %r11 - pushq_cfi %rcx + pushq $0 /* RIP */ + pushq %r11 + pushq %rcx jmp general_protection - CFI_RESTORE_STATE 1: /* Segment mismatch => Category 1 (Bad segment). Retry the IRET. */ movq (%rsp),%rcx - CFI_RESTORE rcx movq 8(%rsp),%r11 - CFI_RESTORE r11 addq $0x30,%rsp - CFI_ADJUST_CFA_OFFSET -0x30 - pushq_cfi $-1 /* orig_ax = -1 => not a system call */ + pushq $-1 /* orig_ax = -1 => not a system call */ ALLOC_PT_GPREGS_ON_STACK SAVE_C_REGS SAVE_EXTRA_REGS jmp error_exit - CFI_ENDPROC END(xen_failsafe_callback) apicinterrupt3 HYPERVISOR_CALLBACK_VECTOR \ @@ -1263,7 +1097,6 @@ idtentry machine_check has_error_code=0 paranoid=1 do_sym=*machine_check_vector( * Return: ebx=0: need swapgs on exit, ebx=1: otherwise */ ENTRY(paranoid_entry) - XCPT_FRAME 1 15*8 cld SAVE_C_REGS 8 SAVE_EXTRA_REGS 8 @@ -1275,7 +1108,6 @@ ENTRY(paranoid_entry) SWAPGS xorl %ebx,%ebx 1: ret - CFI_ENDPROC END(paranoid_entry) /* @@ -1290,7 +1122,6 @@ END(paranoid_entry) */ /* On entry, ebx is "no swapgs" flag (1: don't need swapgs, 0: need it) */ ENTRY(paranoid_exit) - DEFAULT_FRAME DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF_DEBUG testl %ebx,%ebx /* swapgs needed? */ @@ -1305,7 +1136,6 @@ paranoid_exit_restore: RESTORE_C_REGS REMOVE_PT_GPREGS_FROM_STACK 8 INTERRUPT_RETURN - CFI_ENDPROC END(paranoid_exit) /* @@ -1313,7 +1143,6 @@ END(paranoid_exit) * Return: ebx=0: need swapgs on exit, ebx=1: otherwise */ ENTRY(error_entry) - XCPT_FRAME 1 15*8 cld SAVE_C_REGS 8 SAVE_EXTRA_REGS 8 @@ -1333,7 +1162,6 @@ error_sti: * for these here too. */ error_kernelspace: - CFI_REL_OFFSET rcx, RCX+8 incl %ebx leaq native_irq_return_iret(%rip),%rcx cmpq %rcx,RIP+8(%rsp) @@ -1357,13 +1185,11 @@ error_bad_iret: mov %rax,%rsp decl %ebx /* Return to usergs */ jmp error_sti - CFI_ENDPROC END(error_entry) /* On entry, ebx is "no swapgs" flag (1: don't need swapgs, 0: need it) */ ENTRY(error_exit) - DEFAULT_FRAME movl %ebx,%eax RESTORE_EXTRA_REGS DISABLE_INTERRUPTS(CLBR_NONE) @@ -1377,12 +1203,10 @@ ENTRY(error_exit) andl %edi,%edx jnz retint_careful jmp retint_swapgs - CFI_ENDPROC END(error_exit) /* Runs on exception stack */ ENTRY(nmi) - INTR_FRAME PARAVIRT_ADJUST_EXCEPTION_FRAME /* * We allow breakpoints in NMIs. If a breakpoint occurs, then @@ -1417,8 +1241,7 @@ ENTRY(nmi) */ /* Use %rdx as our temp variable throughout */ - pushq_cfi %rdx - CFI_REL_OFFSET rdx, 0 + pushq %rdx /* * If %cs was not the kernel segment, then the NMI triggered in user @@ -1452,8 +1275,6 @@ ENTRY(nmi) jb first_nmi /* Ah, it is within the NMI stack, treat it as nested */ - CFI_REMEMBER_STATE - nested_nmi: /* * Do nothing if we interrupted the fixup in repeat_nmi. @@ -1471,26 +1292,22 @@ nested_nmi: /* Set up the interrupted NMIs stack to jump to repeat_nmi */ leaq -1*8(%rsp), %rdx movq %rdx, %rsp - CFI_ADJUST_CFA_OFFSET 1*8 leaq -10*8(%rsp), %rdx - pushq_cfi $__KERNEL_DS - pushq_cfi %rdx - pushfq_cfi - pushq_cfi $__KERNEL_CS - pushq_cfi $repeat_nmi + pushq $__KERNEL_DS + pushq %rdx + pushfq + pushq $__KERNEL_CS + pushq $repeat_nmi /* Put stack back */ addq $(6*8), %rsp - CFI_ADJUST_CFA_OFFSET -6*8 nested_nmi_out: - popq_cfi %rdx - CFI_RESTORE rdx + popq %rdx /* No need to check faults here */ INTERRUPT_RETURN - CFI_RESTORE_STATE first_nmi: /* * Because nested NMIs will use the pushed location that we @@ -1529,22 +1346,19 @@ first_nmi: */ /* Do not pop rdx, nested NMIs will corrupt that part of the stack */ movq (%rsp), %rdx - CFI_RESTORE rdx /* Set the NMI executing variable on the stack. */ - pushq_cfi $1 + pushq $1 /* * Leave room for the "copied" frame */ subq $(5*8), %rsp - CFI_ADJUST_CFA_OFFSET 5*8 /* Copy the stack frame to the Saved frame */ .rept 5 - pushq_cfi 11*8(%rsp) + pushq 11*8(%rsp) .endr - CFI_DEF_CFA_OFFSET 5*8 /* Everything up to here is safe from nested NMIs */ @@ -1567,12 +1381,10 @@ repeat_nmi: /* Make another copy, this one may be modified by nested NMIs */ addq $(10*8), %rsp - CFI_ADJUST_CFA_OFFSET -10*8 .rept 5 - pushq_cfi -6*8(%rsp) + pushq -6*8(%rsp) .endr subq $(5*8), %rsp - CFI_DEF_CFA_OFFSET 5*8 end_repeat_nmi: /* @@ -1580,7 +1392,7 @@ end_repeat_nmi: * NMI if the first NMI took an exception and reset our iret stack * so that we repeat another NMI. */ - pushq_cfi $-1 /* ORIG_RAX: no syscall to restart */ + pushq $-1 /* ORIG_RAX: no syscall to restart */ ALLOC_PT_GPREGS_ON_STACK /* @@ -1591,7 +1403,6 @@ end_repeat_nmi: * exceptions might do. */ call paranoid_entry - DEFAULT_FRAME 0 /* * Save off the CR2 register. If we take a page fault in the NMI then @@ -1628,13 +1439,10 @@ nmi_restore: /* Clear the NMI executing stack variable */ movq $0, 5*8(%rsp) jmp irq_return - CFI_ENDPROC END(nmi) ENTRY(ignore_sysret) - CFI_STARTPROC mov $-ENOSYS,%eax sysret - CFI_ENDPROC END(ignore_sysret) diff --git a/arch/x86/lib/atomic64_386_32.S b/arch/x86/lib/atomic64_386_32.S index 00933d5e992f..9b0ca8fe80fc 100644 --- a/arch/x86/lib/atomic64_386_32.S +++ b/arch/x86/lib/atomic64_386_32.S @@ -11,26 +11,23 @@ #include <linux/linkage.h> #include <asm/alternative-asm.h> -#include <asm/dwarf2.h> /* if you want SMP support, implement these with real spinlocks */ .macro LOCK reg - pushfl_cfi + pushfl cli .endm .macro UNLOCK reg - popfl_cfi + popfl .endm #define BEGIN(op) \ .macro endp; \ - CFI_ENDPROC; \ ENDPROC(atomic64_##op##_386); \ .purgem endp; \ .endm; \ ENTRY(atomic64_##op##_386); \ - CFI_STARTPROC; \ LOCK v; #define ENDP endp diff --git a/arch/x86/lib/atomic64_cx8_32.S b/arch/x86/lib/atomic64_cx8_32.S index 082a85167a5b..db3ae85440ff 100644 --- a/arch/x86/lib/atomic64_cx8_32.S +++ b/arch/x86/lib/atomic64_cx8_32.S @@ -11,7 +11,6 @@ #include <linux/linkage.h> #include <asm/alternative-asm.h> -#include <asm/dwarf2.h> .macro read64 reg movl %ebx, %eax @@ -22,16 +21,11 @@ .endm ENTRY(atomic64_read_cx8) - CFI_STARTPROC - read64 %ecx ret - CFI_ENDPROC ENDPROC(atomic64_read_cx8) ENTRY(atomic64_set_cx8) - CFI_STARTPROC - 1: /* we don't need LOCK_PREFIX since aligned 64-bit writes * are atomic on 586 and newer */ @@ -39,28 +33,23 @@ ENTRY(atomic64_set_cx8) jne 1b ret - CFI_ENDPROC ENDPROC(atomic64_set_cx8) ENTRY(atomic64_xchg_cx8) - CFI_STARTPROC - 1: LOCK_PREFIX cmpxchg8b (%esi) jne 1b ret - CFI_ENDPROC ENDPROC(atomic64_xchg_cx8) .macro addsub_return func ins insc ENTRY(atomic64_\func\()_return_cx8) - CFI_STARTPROC - pushl_cfi_reg ebp - pushl_cfi_reg ebx - pushl_cfi_reg esi - pushl_cfi_reg edi + pushl %ebp + pushl %ebx + pushl %esi + pushl %edi movl %eax, %esi movl %edx, %edi @@ -79,12 +68,11 @@ ENTRY(atomic64_\func\()_return_cx8) 10: movl %ebx, %eax movl %ecx, %edx - popl_cfi_reg edi - popl_cfi_reg esi - popl_cfi_reg ebx - popl_cfi_reg ebp + popl %edi + popl %esi + popl %ebx + popl %ebp ret - CFI_ENDPROC ENDPROC(atomic64_\func\()_return_cx8) .endm @@ -93,8 +81,7 @@ addsub_return sub sub sbb .macro incdec_return func ins insc ENTRY(atomic64_\func\()_return_cx8) - CFI_STARTPROC - pushl_cfi_reg ebx + pushl %ebx read64 %esi 1: @@ -109,9 +96,8 @@ ENTRY(atomic64_\func\()_return_cx8) 10: movl %ebx, %eax movl %ecx, %edx - popl_cfi_reg ebx + popl %ebx ret - CFI_ENDPROC ENDPROC(atomic64_\func\()_return_cx8) .endm @@ -119,8 +105,7 @@ incdec_return inc add adc incdec_return dec sub sbb ENTRY(atomic64_dec_if_positive_cx8) - CFI_STARTPROC - pushl_cfi_reg ebx + pushl %ebx read64 %esi 1: @@ -136,18 +121,16 @@ ENTRY(atomic64_dec_if_positive_cx8) 2: movl %ebx, %eax movl %ecx, %edx - popl_cfi_reg ebx + popl %ebx ret - CFI_ENDPROC ENDPROC(atomic64_dec_if_positive_cx8) ENTRY(atomic64_add_unless_cx8) - CFI_STARTPROC - pushl_cfi_reg ebp - pushl_cfi_reg ebx + pushl %ebp + pushl %ebx /* these just push these two parameters on the stack */ - pushl_cfi_reg edi - pushl_cfi_reg ecx + pushl %edi + pushl %ecx movl %eax, %ebp movl %edx, %edi @@ -168,21 +151,18 @@ ENTRY(atomic64_add_unless_cx8) movl $1, %eax 3: addl $8, %esp - CFI_ADJUST_CFA_OFFSET -8 - popl_cfi_reg ebx - popl_cfi_reg ebp + popl %ebx + popl %ebp ret 4: cmpl %edx, 4(%esp) jne 2b xorl %eax, %eax jmp 3b - CFI_ENDPROC ENDPROC(atomic64_add_unless_cx8) ENTRY(atomic64_inc_not_zero_cx8) - CFI_STARTPROC - pushl_cfi_reg ebx + pushl %ebx read64 %esi 1: @@ -199,7 +179,6 @@ ENTRY(atomic64_inc_not_zero_cx8) movl $1, %eax 3: - popl_cfi_reg ebx + popl %ebx ret - CFI_ENDPROC ENDPROC(atomic64_inc_not_zero_cx8) diff --git a/arch/x86/lib/checksum_32.S b/arch/x86/lib/checksum_32.S index 9bc944a91274..c1e623209853 100644 --- a/arch/x86/lib/checksum_32.S +++ b/arch/x86/lib/checksum_32.S @@ -26,7 +26,6 @@ */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/errno.h> #include <asm/asm.h> @@ -50,9 +49,8 @@ unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum) * alignment for the unrolled loop. */ ENTRY(csum_partial) - CFI_STARTPROC - pushl_cfi_reg esi - pushl_cfi_reg ebx + pushl %esi + pushl %ebx movl 20(%esp),%eax # Function arg: unsigned int sum movl 16(%esp),%ecx # Function arg: int len movl 12(%esp),%esi # Function arg: unsigned char *buff @@ -129,10 +127,9 @@ ENTRY(csum_partial) jz 8f roll $8, %eax 8: - popl_cfi_reg ebx - popl_cfi_reg esi + popl %ebx + popl %esi ret - CFI_ENDPROC ENDPROC(csum_partial) #else @@ -140,9 +137,8 @@ ENDPROC(csum_partial) /* Version for PentiumII/PPro */ ENTRY(csum_partial) - CFI_STARTPROC - pushl_cfi_reg esi - pushl_cfi_reg ebx + pushl %esi + pushl %ebx movl 20(%esp),%eax # Function arg: unsigned int sum movl 16(%esp),%ecx # Function arg: int len movl 12(%esp),%esi # Function arg: const unsigned char *buf @@ -249,10 +245,9 @@ ENTRY(csum_partial) jz 90f roll $8, %eax 90: - popl_cfi_reg ebx - popl_cfi_reg esi + popl %ebx + popl %esi ret - CFI_ENDPROC ENDPROC(csum_partial) #endif @@ -287,12 +282,10 @@ unsigned int csum_partial_copy_generic (const char *src, char *dst, #define FP 12 ENTRY(csum_partial_copy_generic) - CFI_STARTPROC subl $4,%esp - CFI_ADJUST_CFA_OFFSET 4 - pushl_cfi_reg edi - pushl_cfi_reg esi - pushl_cfi_reg ebx + pushl %edi + pushl %esi + pushl %ebx movl ARGBASE+16(%esp),%eax # sum movl ARGBASE+12(%esp),%ecx # len movl ARGBASE+4(%esp),%esi # src @@ -401,12 +394,11 @@ DST( movb %cl, (%edi) ) .previous - popl_cfi_reg ebx - popl_cfi_reg esi - popl_cfi_reg edi - popl_cfi %ecx # equivalent to addl $4,%esp + popl %ebx + popl %esi + popl %edi + popl %ecx # equivalent to addl $4,%esp ret - CFI_ENDPROC ENDPROC(csum_partial_copy_generic) #else @@ -426,10 +418,9 @@ ENDPROC(csum_partial_copy_generic) #define ARGBASE 12 ENTRY(csum_partial_copy_generic) - CFI_STARTPROC - pushl_cfi_reg ebx - pushl_cfi_reg edi - pushl_cfi_reg esi + pushl %ebx + pushl %edi + pushl %esi movl ARGBASE+4(%esp),%esi #src movl ARGBASE+8(%esp),%edi #dst movl ARGBASE+12(%esp),%ecx #len @@ -489,11 +480,10 @@ DST( movb %dl, (%edi) ) jmp 7b .previous - popl_cfi_reg esi - popl_cfi_reg edi - popl_cfi_reg ebx + popl %esi + popl %edi + popl %ebx ret - CFI_ENDPROC ENDPROC(csum_partial_copy_generic) #undef ROUND diff --git a/arch/x86/lib/clear_page_64.S b/arch/x86/lib/clear_page_64.S index e67e579c93bd..a2fe51b00cce 100644 --- a/arch/x86/lib/clear_page_64.S +++ b/arch/x86/lib/clear_page_64.S @@ -1,5 +1,4 @@ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/cpufeature.h> #include <asm/alternative-asm.h> @@ -15,7 +14,6 @@ * %rdi - page */ ENTRY(clear_page) - CFI_STARTPROC ALTERNATIVE_2 "jmp clear_page_orig", "", X86_FEATURE_REP_GOOD, \ "jmp clear_page_c_e", X86_FEATURE_ERMS @@ -24,11 +22,9 @@ ENTRY(clear_page) xorl %eax,%eax rep stosq ret - CFI_ENDPROC ENDPROC(clear_page) ENTRY(clear_page_orig) - CFI_STARTPROC xorl %eax,%eax movl $4096/64,%ecx @@ -48,14 +44,11 @@ ENTRY(clear_page_orig) jnz .Lloop nop ret - CFI_ENDPROC ENDPROC(clear_page_orig) ENTRY(clear_page_c_e) - CFI_STARTPROC movl $4096,%ecx xorl %eax,%eax rep stosb ret - CFI_ENDPROC ENDPROC(clear_page_c_e) diff --git a/arch/x86/lib/cmpxchg16b_emu.S b/arch/x86/lib/cmpxchg16b_emu.S index 40a172541ee2..9b330242e740 100644 --- a/arch/x86/lib/cmpxchg16b_emu.S +++ b/arch/x86/lib/cmpxchg16b_emu.S @@ -6,7 +6,6 @@ * */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/percpu.h> .text @@ -21,7 +20,6 @@ * %al : Operation successful */ ENTRY(this_cpu_cmpxchg16b_emu) -CFI_STARTPROC # # Emulate 'cmpxchg16b %gs:(%rsi)' except we return the result in %al not @@ -32,7 +30,7 @@ CFI_STARTPROC # *atomic* on a single cpu (as provided by the this_cpu_xx class of # macros). # - pushfq_cfi + pushfq cli cmpq PER_CPU_VAR((%rsi)), %rax @@ -43,17 +41,13 @@ CFI_STARTPROC movq %rbx, PER_CPU_VAR((%rsi)) movq %rcx, PER_CPU_VAR(8(%rsi)) - CFI_REMEMBER_STATE - popfq_cfi + popfq mov $1, %al ret - CFI_RESTORE_STATE .Lnot_same: - popfq_cfi + popfq xor %al,%al ret -CFI_ENDPROC - ENDPROC(this_cpu_cmpxchg16b_emu) diff --git a/arch/x86/lib/cmpxchg8b_emu.S b/arch/x86/lib/cmpxchg8b_emu.S index b4807fce5177..ad5349778490 100644 --- a/arch/x86/lib/cmpxchg8b_emu.S +++ b/arch/x86/lib/cmpxchg8b_emu.S @@ -7,7 +7,6 @@ */ #include <linux/linkage.h> -#include <asm/dwarf2.h> .text @@ -20,14 +19,13 @@ * %ecx : high 32 bits of new value */ ENTRY(cmpxchg8b_emu) -CFI_STARTPROC # # Emulate 'cmpxchg8b (%esi)' on UP except we don't # set the whole ZF thing (caller will just compare # eax:edx with the expected value) # - pushfl_cfi + pushfl cli cmpl (%esi), %eax @@ -38,18 +36,15 @@ CFI_STARTPROC movl %ebx, (%esi) movl %ecx, 4(%esi) - CFI_REMEMBER_STATE - popfl_cfi + popfl ret - CFI_RESTORE_STATE .Lnot_same: movl (%esi), %eax .Lhalf_same: movl 4(%esi), %edx - popfl_cfi + popfl ret -CFI_ENDPROC ENDPROC(cmpxchg8b_emu) diff --git a/arch/x86/lib/copy_page_64.S b/arch/x86/lib/copy_page_64.S index 8239dbcbf984..009f98216b7e 100644 --- a/arch/x86/lib/copy_page_64.S +++ b/arch/x86/lib/copy_page_64.S @@ -1,7 +1,6 @@ /* Written 2003 by Andi Kleen, based on a kernel by Evandro Menezes */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/cpufeature.h> #include <asm/alternative-asm.h> @@ -13,22 +12,16 @@ */ ALIGN ENTRY(copy_page) - CFI_STARTPROC ALTERNATIVE "jmp copy_page_regs", "", X86_FEATURE_REP_GOOD movl $4096/8, %ecx rep movsq ret - CFI_ENDPROC ENDPROC(copy_page) ENTRY(copy_page_regs) - CFI_STARTPROC subq $2*8, %rsp - CFI_ADJUST_CFA_OFFSET 2*8 movq %rbx, (%rsp) - CFI_REL_OFFSET rbx, 0 movq %r12, 1*8(%rsp) - CFI_REL_OFFSET r12, 1*8 movl $(4096/64)-5, %ecx .p2align 4 @@ -87,11 +80,7 @@ ENTRY(copy_page_regs) jnz .Loop2 movq (%rsp), %rbx - CFI_RESTORE rbx movq 1*8(%rsp), %r12 - CFI_RESTORE r12 addq $2*8, %rsp - CFI_ADJUST_CFA_OFFSET -2*8 ret - CFI_ENDPROC ENDPROC(copy_page_regs) diff --git a/arch/x86/lib/copy_user_64.S b/arch/x86/lib/copy_user_64.S index e4b3beee83bd..982ce34f4a9b 100644 --- a/arch/x86/lib/copy_user_64.S +++ b/arch/x86/lib/copy_user_64.S @@ -7,7 +7,6 @@ */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/current.h> #include <asm/asm-offsets.h> #include <asm/thread_info.h> @@ -18,7 +17,6 @@ /* Standard copy_to_user with segment limit checking */ ENTRY(_copy_to_user) - CFI_STARTPROC GET_THREAD_INFO(%rax) movq %rdi,%rcx addq %rdx,%rcx @@ -30,12 +28,10 @@ ENTRY(_copy_to_user) X86_FEATURE_REP_GOOD, \ "jmp copy_user_enhanced_fast_string", \ X86_FEATURE_ERMS - CFI_ENDPROC ENDPROC(_copy_to_user) /* Standard copy_from_user with segment limit checking */ ENTRY(_copy_from_user) - CFI_STARTPROC GET_THREAD_INFO(%rax) movq %rsi,%rcx addq %rdx,%rcx @@ -47,14 +43,12 @@ ENTRY(_copy_from_user) X86_FEATURE_REP_GOOD, \ "jmp copy_user_enhanced_fast_string", \ X86_FEATURE_ERMS - CFI_ENDPROC ENDPROC(_copy_from_user) .section .fixup,"ax" /* must zero dest */ ENTRY(bad_from_user) bad_from_user: - CFI_STARTPROC movl %edx,%ecx xorl %eax,%eax rep @@ -62,7 +56,6 @@ bad_from_user: bad_to_user: movl %edx,%eax ret - CFI_ENDPROC ENDPROC(bad_from_user) .previous @@ -80,7 +73,6 @@ ENDPROC(bad_from_user) * eax uncopied bytes or 0 if successful. */ ENTRY(copy_user_generic_unrolled) - CFI_STARTPROC ASM_STAC cmpl $8,%edx jb 20f /* less then 8 bytes, go to byte copy loop */ @@ -162,7 +154,6 @@ ENTRY(copy_user_generic_unrolled) _ASM_EXTABLE(19b,40b) _ASM_EXTABLE(21b,50b) _ASM_EXTABLE(22b,50b) - CFI_ENDPROC ENDPROC(copy_user_generic_unrolled) /* Some CPUs run faster using the string copy instructions. @@ -184,7 +175,6 @@ ENDPROC(copy_user_generic_unrolled) * eax uncopied bytes or 0 if successful. */ ENTRY(copy_user_generic_string) - CFI_STARTPROC ASM_STAC cmpl $8,%edx jb 2f /* less than 8 bytes, go to byte copy loop */ @@ -209,7 +199,6 @@ ENTRY(copy_user_generic_string) _ASM_EXTABLE(1b,11b) _ASM_EXTABLE(3b,12b) - CFI_ENDPROC ENDPROC(copy_user_generic_string) /* @@ -225,7 +214,6 @@ ENDPROC(copy_user_generic_string) * eax uncopied bytes or 0 if successful. */ ENTRY(copy_user_enhanced_fast_string) - CFI_STARTPROC ASM_STAC movl %edx,%ecx 1: rep @@ -240,7 +228,6 @@ ENTRY(copy_user_enhanced_fast_string) .previous _ASM_EXTABLE(1b,12b) - CFI_ENDPROC ENDPROC(copy_user_enhanced_fast_string) /* @@ -248,7 +235,6 @@ ENDPROC(copy_user_enhanced_fast_string) * This will force destination/source out of cache for more performance. */ ENTRY(__copy_user_nocache) - CFI_STARTPROC ASM_STAC cmpl $8,%edx jb 20f /* less then 8 bytes, go to byte copy loop */ @@ -332,5 +318,4 @@ ENTRY(__copy_user_nocache) _ASM_EXTABLE(19b,40b) _ASM_EXTABLE(21b,50b) _ASM_EXTABLE(22b,50b) - CFI_ENDPROC ENDPROC(__copy_user_nocache) diff --git a/arch/x86/lib/csum-copy_64.S b/arch/x86/lib/csum-copy_64.S index 9734182966f3..7e48807b2fa1 100644 --- a/arch/x86/lib/csum-copy_64.S +++ b/arch/x86/lib/csum-copy_64.S @@ -6,7 +6,6 @@ * for more details. No warranty for anything given at all. */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/errno.h> #include <asm/asm.h> @@ -47,23 +46,16 @@ ENTRY(csum_partial_copy_generic) - CFI_STARTPROC cmpl $3*64, %edx jle .Lignore .Lignore: subq $7*8, %rsp - CFI_ADJUST_CFA_OFFSET 7*8 movq %rbx, 2*8(%rsp) - CFI_REL_OFFSET rbx, 2*8 movq %r12, 3*8(%rsp) - CFI_REL_OFFSET r12, 3*8 movq %r14, 4*8(%rsp) - CFI_REL_OFFSET r14, 4*8 movq %r13, 5*8(%rsp) - CFI_REL_OFFSET r13, 5*8 movq %rbp, 6*8(%rsp) - CFI_REL_OFFSET rbp, 6*8 movq %r8, (%rsp) movq %r9, 1*8(%rsp) @@ -206,22 +198,14 @@ ENTRY(csum_partial_copy_generic) addl %ebx, %eax adcl %r9d, %eax /* carry */ - CFI_REMEMBER_STATE .Lende: movq 2*8(%rsp), %rbx - CFI_RESTORE rbx movq 3*8(%rsp), %r12 - CFI_RESTORE r12 movq 4*8(%rsp), %r14 - CFI_RESTORE r14 movq 5*8(%rsp), %r13 - CFI_RESTORE r13 movq 6*8(%rsp), %rbp - CFI_RESTORE rbp addq $7*8, %rsp - CFI_ADJUST_CFA_OFFSET -7*8 ret - CFI_RESTORE_STATE /* Exception handlers. Very simple, zeroing is done in the wrappers */ .Lbad_source: @@ -237,5 +221,4 @@ ENTRY(csum_partial_copy_generic) jz .Lende movl $-EFAULT, (%rax) jmp .Lende - CFI_ENDPROC ENDPROC(csum_partial_copy_generic) diff --git a/arch/x86/lib/getuser.S b/arch/x86/lib/getuser.S index a4512359656a..46668cda4ffd 100644 --- a/arch/x86/lib/getuser.S +++ b/arch/x86/lib/getuser.S @@ -26,7 +26,6 @@ */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/page_types.h> #include <asm/errno.h> #include <asm/asm-offsets.h> @@ -36,7 +35,6 @@ .text ENTRY(__get_user_1) - CFI_STARTPROC GET_THREAD_INFO(%_ASM_DX) cmp TI_addr_limit(%_ASM_DX),%_ASM_AX jae bad_get_user @@ -45,11 +43,9 @@ ENTRY(__get_user_1) xor %eax,%eax ASM_CLAC ret - CFI_ENDPROC ENDPROC(__get_user_1) ENTRY(__get_user_2) - CFI_STARTPROC add $1,%_ASM_AX jc bad_get_user GET_THREAD_INFO(%_ASM_DX) @@ -60,11 +56,9 @@ ENTRY(__get_user_2) xor %eax,%eax ASM_CLAC ret - CFI_ENDPROC ENDPROC(__get_user_2) ENTRY(__get_user_4) - CFI_STARTPROC add $3,%_ASM_AX jc bad_get_user GET_THREAD_INFO(%_ASM_DX) @@ -75,11 +69,9 @@ ENTRY(__get_user_4) xor %eax,%eax ASM_CLAC ret - CFI_ENDPROC ENDPROC(__get_user_4) ENTRY(__get_user_8) - CFI_STARTPROC #ifdef CONFIG_X86_64 add $7,%_ASM_AX jc bad_get_user @@ -104,28 +96,23 @@ ENTRY(__get_user_8) ASM_CLAC ret #endif - CFI_ENDPROC ENDPROC(__get_user_8) bad_get_user: - CFI_STARTPROC xor %edx,%edx mov $(-EFAULT),%_ASM_AX ASM_CLAC ret - CFI_ENDPROC END(bad_get_user) #ifdef CONFIG_X86_32 bad_get_user_8: - CFI_STARTPROC xor %edx,%edx xor %ecx,%ecx mov $(-EFAULT),%_ASM_AX ASM_CLAC ret - CFI_ENDPROC END(bad_get_user_8) #endif diff --git a/arch/x86/lib/iomap_copy_64.S b/arch/x86/lib/iomap_copy_64.S index 05a95e713da8..33147fef3452 100644 --- a/arch/x86/lib/iomap_copy_64.S +++ b/arch/x86/lib/iomap_copy_64.S @@ -16,15 +16,12 @@ */ #include <linux/linkage.h> -#include <asm/dwarf2.h> /* * override generic version in lib/iomap_copy.c */ ENTRY(__iowrite32_copy) - CFI_STARTPROC movl %edx,%ecx rep movsd ret - CFI_ENDPROC ENDPROC(__iowrite32_copy) diff --git a/arch/x86/lib/memcpy_64.S b/arch/x86/lib/memcpy_64.S index b046664f5a1c..16698bba87de 100644 --- a/arch/x86/lib/memcpy_64.S +++ b/arch/x86/lib/memcpy_64.S @@ -2,7 +2,6 @@ #include <linux/linkage.h> #include <asm/cpufeature.h> -#include <asm/dwarf2.h> #include <asm/alternative-asm.h> /* @@ -53,7 +52,6 @@ ENTRY(memcpy_erms) ENDPROC(memcpy_erms) ENTRY(memcpy_orig) - CFI_STARTPROC movq %rdi, %rax cmpq $0x20, %rdx @@ -178,5 +176,4 @@ ENTRY(memcpy_orig) .Lend: retq - CFI_ENDPROC ENDPROC(memcpy_orig) diff --git a/arch/x86/lib/memmove_64.S b/arch/x86/lib/memmove_64.S index 0f8a0d0331b9..ca2afdd6d98e 100644 --- a/arch/x86/lib/memmove_64.S +++ b/arch/x86/lib/memmove_64.S @@ -6,7 +6,6 @@ * - Copyright 2011 Fenghua Yu <fenghua.yu@intel.com> */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/cpufeature.h> #include <asm/alternative-asm.h> @@ -27,7 +26,6 @@ ENTRY(memmove) ENTRY(__memmove) - CFI_STARTPROC /* Handle more 32 bytes in loop */ mov %rdi, %rax @@ -207,6 +205,5 @@ ENTRY(__memmove) movb %r11b, (%rdi) 13: retq - CFI_ENDPROC ENDPROC(__memmove) ENDPROC(memmove) diff --git a/arch/x86/lib/memset_64.S b/arch/x86/lib/memset_64.S index 93118fb23976..2661fad05827 100644 --- a/arch/x86/lib/memset_64.S +++ b/arch/x86/lib/memset_64.S @@ -1,7 +1,6 @@ /* Copyright 2002 Andi Kleen, SuSE Labs */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/cpufeature.h> #include <asm/alternative-asm.h> @@ -66,7 +65,6 @@ ENTRY(memset_erms) ENDPROC(memset_erms) ENTRY(memset_orig) - CFI_STARTPROC movq %rdi,%r10 /* expand byte value */ @@ -78,7 +76,6 @@ ENTRY(memset_orig) movl %edi,%r9d andl $7,%r9d jnz .Lbad_alignment - CFI_REMEMBER_STATE .Lafter_bad_alignment: movq %rdx,%rcx @@ -128,7 +125,6 @@ ENTRY(memset_orig) movq %r10,%rax ret - CFI_RESTORE_STATE .Lbad_alignment: cmpq $7,%rdx jbe .Lhandle_7 @@ -139,5 +135,4 @@ ENTRY(memset_orig) subq %r8,%rdx jmp .Lafter_bad_alignment .Lfinal: - CFI_ENDPROC ENDPROC(memset_orig) diff --git a/arch/x86/lib/msr-reg.S b/arch/x86/lib/msr-reg.S index 3ca5218fbece..c81556409bbb 100644 --- a/arch/x86/lib/msr-reg.S +++ b/arch/x86/lib/msr-reg.S @@ -1,6 +1,5 @@ #include <linux/linkage.h> #include <linux/errno.h> -#include <asm/dwarf2.h> #include <asm/asm.h> #include <asm/msr.h> @@ -13,9 +12,8 @@ */ .macro op_safe_regs op ENTRY(\op\()_safe_regs) - CFI_STARTPROC - pushq_cfi_reg rbx - pushq_cfi_reg rbp + pushq %rbx + pushq %rbp movq %rdi, %r10 /* Save pointer */ xorl %r11d, %r11d /* Return value */ movl (%rdi), %eax @@ -25,7 +23,6 @@ ENTRY(\op\()_safe_regs) movl 20(%rdi), %ebp movl 24(%rdi), %esi movl 28(%rdi), %edi - CFI_REMEMBER_STATE 1: \op 2: movl %eax, (%r10) movl %r11d, %eax /* Return value */ @@ -35,16 +32,14 @@ ENTRY(\op\()_safe_regs) movl %ebp, 20(%r10) movl %esi, 24(%r10) movl %edi, 28(%r10) - popq_cfi_reg rbp - popq_cfi_reg rbx + popq %rbp + popq %rbx ret 3: - CFI_RESTORE_STATE movl $-EIO, %r11d jmp 2b _ASM_EXTABLE(1b, 3b) - CFI_ENDPROC ENDPROC(\op\()_safe_regs) .endm @@ -52,13 +47,12 @@ ENDPROC(\op\()_safe_regs) .macro op_safe_regs op ENTRY(\op\()_safe_regs) - CFI_STARTPROC - pushl_cfi_reg ebx - pushl_cfi_reg ebp - pushl_cfi_reg esi - pushl_cfi_reg edi - pushl_cfi $0 /* Return value */ - pushl_cfi %eax + pushl %ebx + pushl %ebp + pushl %esi + pushl %edi + pushl $0 /* Return value */ + pushl %eax movl 4(%eax), %ecx movl 8(%eax), %edx movl 12(%eax), %ebx @@ -66,32 +60,28 @@ ENTRY(\op\()_safe_regs) movl 24(%eax), %esi movl 28(%eax), %edi movl (%eax), %eax - CFI_REMEMBER_STATE 1: \op -2: pushl_cfi %eax +2: pushl %eax movl 4(%esp), %eax - popl_cfi (%eax) + popl (%eax) addl $4, %esp - CFI_ADJUST_CFA_OFFSET -4 movl %ecx, 4(%eax) movl %edx, 8(%eax) movl %ebx, 12(%eax) movl %ebp, 20(%eax) movl %esi, 24(%eax) movl %edi, 28(%eax) - popl_cfi %eax - popl_cfi_reg edi - popl_cfi_reg esi - popl_cfi_reg ebp - popl_cfi_reg ebx + popl %eax + popl %edi + popl %esi + popl %ebp + popl %ebx ret 3: - CFI_RESTORE_STATE movl $-EIO, 4(%esp) jmp 2b _ASM_EXTABLE(1b, 3b) - CFI_ENDPROC ENDPROC(\op\()_safe_regs) .endm diff --git a/arch/x86/lib/putuser.S b/arch/x86/lib/putuser.S index fc6ba17a7eec..e0817a12d323 100644 --- a/arch/x86/lib/putuser.S +++ b/arch/x86/lib/putuser.S @@ -11,7 +11,6 @@ * return value. */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/thread_info.h> #include <asm/errno.h> #include <asm/asm.h> @@ -30,11 +29,9 @@ * as they get called from within inline assembly. */ -#define ENTER CFI_STARTPROC ; \ - GET_THREAD_INFO(%_ASM_BX) +#define ENTER GET_THREAD_INFO(%_ASM_BX) #define EXIT ASM_CLAC ; \ - ret ; \ - CFI_ENDPROC + ret .text ENTRY(__put_user_1) @@ -87,7 +84,6 @@ ENTRY(__put_user_8) ENDPROC(__put_user_8) bad_put_user: - CFI_STARTPROC movl $-EFAULT,%eax EXIT END(bad_put_user) diff --git a/arch/x86/lib/rwsem.S b/arch/x86/lib/rwsem.S index 2322abe4da3b..40027db99140 100644 --- a/arch/x86/lib/rwsem.S +++ b/arch/x86/lib/rwsem.S @@ -15,7 +15,6 @@ #include <linux/linkage.h> #include <asm/alternative-asm.h> -#include <asm/dwarf2.h> #define __ASM_HALF_REG(reg) __ASM_SEL(reg, e##reg) #define __ASM_HALF_SIZE(inst) __ASM_SEL(inst##w, inst##l) @@ -34,10 +33,10 @@ */ #define save_common_regs \ - pushl_cfi_reg ecx + pushl %ecx #define restore_common_regs \ - popl_cfi_reg ecx + popl %ecx /* Avoid uglifying the argument copying x86-64 needs to do. */ .macro movq src, dst @@ -64,50 +63,45 @@ */ #define save_common_regs \ - pushq_cfi_reg rdi; \ - pushq_cfi_reg rsi; \ - pushq_cfi_reg rcx; \ - pushq_cfi_reg r8; \ - pushq_cfi_reg r9; \ - pushq_cfi_reg r10; \ - pushq_cfi_reg r11 + pushq %rdi; \ + pushq %rsi; \ + pushq %rcx; \ + pushq %r8; \ + pushq %r9; \ + pushq %r10; \ + pushq %r11 #define restore_common_regs \ - popq_cfi_reg r11; \ - popq_cfi_reg r10; \ - popq_cfi_reg r9; \ - popq_cfi_reg r8; \ - popq_cfi_reg rcx; \ - popq_cfi_reg rsi; \ - popq_cfi_reg rdi + popq %r11; \ + popq %r10; \ + popq %r9; \ + popq %r8; \ + popq %rcx; \ + popq %rsi; \ + popq %rdi #endif /* Fix up special calling conventions */ ENTRY(call_rwsem_down_read_failed) - CFI_STARTPROC save_common_regs - __ASM_SIZE(push,_cfi_reg) __ASM_REG(dx) + __ASM_SIZE(push,) %__ASM_REG(dx) movq %rax,%rdi call rwsem_down_read_failed - __ASM_SIZE(pop,_cfi_reg) __ASM_REG(dx) + __ASM_SIZE(pop,) %__ASM_REG(dx) restore_common_regs ret - CFI_ENDPROC ENDPROC(call_rwsem_down_read_failed) ENTRY(call_rwsem_down_write_failed) - CFI_STARTPROC save_common_regs movq %rax,%rdi call rwsem_down_write_failed restore_common_regs ret - CFI_ENDPROC ENDPROC(call_rwsem_down_write_failed) ENTRY(call_rwsem_wake) - CFI_STARTPROC /* do nothing if still outstanding active readers */ __ASM_HALF_SIZE(dec) %__ASM_HALF_REG(dx) jnz 1f @@ -116,17 +110,14 @@ ENTRY(call_rwsem_wake) call rwsem_wake restore_common_regs 1: ret - CFI_ENDPROC ENDPROC(call_rwsem_wake) ENTRY(call_rwsem_downgrade_wake) - CFI_STARTPROC save_common_regs - __ASM_SIZE(push,_cfi_reg) __ASM_REG(dx) + __ASM_SIZE(push,) %__ASM_REG(dx) movq %rax,%rdi call rwsem_downgrade_wake - __ASM_SIZE(pop,_cfi_reg) __ASM_REG(dx) + __ASM_SIZE(pop,) %__ASM_REG(dx) restore_common_regs ret - CFI_ENDPROC ENDPROC(call_rwsem_downgrade_wake) diff --git a/arch/x86/lib/thunk_32.S b/arch/x86/lib/thunk_32.S index 5eb715087b80..e9acf5f4fc92 100644 --- a/arch/x86/lib/thunk_32.S +++ b/arch/x86/lib/thunk_32.S @@ -6,16 +6,14 @@ */ #include <linux/linkage.h> #include <asm/asm.h> - #include <asm/dwarf2.h> /* put return address in eax (arg1) */ .macro THUNK name, func, put_ret_addr_in_eax=0 .globl \name \name: - CFI_STARTPROC - pushl_cfi_reg eax - pushl_cfi_reg ecx - pushl_cfi_reg edx + pushl %eax + pushl %ecx + pushl %edx .if \put_ret_addr_in_eax /* Place EIP in the arg1 */ @@ -23,11 +21,10 @@ .endif call \func - popl_cfi_reg edx - popl_cfi_reg ecx - popl_cfi_reg eax + popl %edx + popl %ecx + popl %eax ret - CFI_ENDPROC _ASM_NOKPROBE(\name) .endm diff --git a/arch/x86/lib/thunk_64.S b/arch/x86/lib/thunk_64.S index f89ba4e93025..10f555e435e1 100644 --- a/arch/x86/lib/thunk_64.S +++ b/arch/x86/lib/thunk_64.S @@ -6,7 +6,6 @@ * Subject to the GNU public license, v.2. No warranty of any kind. */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/calling.h> #include <asm/asm.h> @@ -14,27 +13,25 @@ .macro THUNK name, func, put_ret_addr_in_rdi=0 .globl \name \name: - CFI_STARTPROC /* this one pushes 9 elems, the next one would be %rIP */ - pushq_cfi_reg rdi - pushq_cfi_reg rsi - pushq_cfi_reg rdx - pushq_cfi_reg rcx - pushq_cfi_reg rax - pushq_cfi_reg r8 - pushq_cfi_reg r9 - pushq_cfi_reg r10 - pushq_cfi_reg r11 + pushq %rdi + pushq %rsi + pushq %rdx + pushq %rcx + pushq %rax + pushq %r8 + pushq %r9 + pushq %r10 + pushq %r11 .if \put_ret_addr_in_rdi /* 9*8(%rsp) is return addr on stack */ - movq_cfi_restore 9*8, rdi + movq 9*8(%rsp), %rdi .endif call \func jmp restore - CFI_ENDPROC _ASM_NOKPROBE(\name) .endm @@ -57,19 +54,16 @@ #if defined(CONFIG_TRACE_IRQFLAGS) \ || defined(CONFIG_DEBUG_LOCK_ALLOC) \ || defined(CONFIG_PREEMPT) - CFI_STARTPROC - CFI_ADJUST_CFA_OFFSET 9*8 restore: - popq_cfi_reg r11 - popq_cfi_reg r10 - popq_cfi_reg r9 - popq_cfi_reg r8 - popq_cfi_reg rax - popq_cfi_reg rcx - popq_cfi_reg rdx - popq_cfi_reg rsi - popq_cfi_reg rdi + popq %r11 + popq %r10 + popq %r9 + popq %r8 + popq %rax + popq %rcx + popq %rdx + popq %rsi + popq %rdi ret - CFI_ENDPROC _ASM_NOKPROBE(restore) #endif diff --git a/arch/x86/net/bpf_jit.S b/arch/x86/net/bpf_jit.S index 6440221ced0d..4093216b3791 100644 --- a/arch/x86/net/bpf_jit.S +++ b/arch/x86/net/bpf_jit.S @@ -8,7 +8,6 @@ * of the License. */ #include <linux/linkage.h> -#include <asm/dwarf2.h> /* * Calling convention : |