mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 14:06:03 +00:00
x86: Use {push,pop}{l,q}_cfi in more places
... plus additionally introduce {push,pop}f{l,q}_cfi. All in the
hope that the code becomes better readable this way (it gets
quite a bit smaller in any case).
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Alexander van Heukelum <heukelum@fastmail.fm>
LKML-Reference: <4C7FBDA40200007800013FAF@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jan Beulich
Ingo Molnar
parent
a34107b557
commit
df5d1874ce
@ -89,6 +89,16 @@
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CFI_ADJUST_CFA_OFFSET -8
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.endm
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.macro pushfq_cfi
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pushfq
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CFI_ADJUST_CFA_OFFSET 8
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.endm
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.macro popfq_cfi
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popfq
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CFI_ADJUST_CFA_OFFSET -8
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.endm
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.macro movq_cfi reg offset=0
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movq %\reg, \offset(%rsp)
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CFI_REL_OFFSET \reg, \offset
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@ -109,6 +119,16 @@
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CFI_ADJUST_CFA_OFFSET -4
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.endm
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.macro pushfl_cfi
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pushfl
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CFI_ADJUST_CFA_OFFSET 4
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.endm
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.macro popfl_cfi
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popfl
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CFI_ADJUST_CFA_OFFSET -4
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.endm
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.macro movl_cfi reg offset=0
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movl %\reg, \offset(%esp)
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CFI_REL_OFFSET \reg, \offset
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@ -115,8 +115,7 @@
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/* unfortunately push/pop can't be no-op */
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.macro PUSH_GS
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pushl $0
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $0
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.endm
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.macro POP_GS pop=0
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addl $(4 + \pop), %esp
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@ -140,14 +139,12 @@
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#else /* CONFIG_X86_32_LAZY_GS */
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.macro PUSH_GS
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pushl %gs
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %gs
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/*CFI_REL_OFFSET gs, 0*/
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.endm
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.macro POP_GS pop=0
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98: popl %gs
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CFI_ADJUST_CFA_OFFSET -4
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98: popl_cfi %gs
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/*CFI_RESTORE gs*/
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.if \pop <> 0
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add $\pop, %esp
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@ -195,35 +192,25 @@
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.macro SAVE_ALL
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cld
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PUSH_GS
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pushl %fs
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %fs
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/*CFI_REL_OFFSET fs, 0;*/
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pushl %es
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %es
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/*CFI_REL_OFFSET es, 0;*/
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pushl %ds
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %ds
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/*CFI_REL_OFFSET ds, 0;*/
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pushl %eax
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %eax
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CFI_REL_OFFSET eax, 0
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pushl %ebp
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %ebp
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CFI_REL_OFFSET ebp, 0
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pushl %edi
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %edi
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CFI_REL_OFFSET edi, 0
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pushl %esi
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %esi
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CFI_REL_OFFSET esi, 0
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pushl %edx
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %edx
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CFI_REL_OFFSET edx, 0
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pushl %ecx
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %ecx
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CFI_REL_OFFSET ecx, 0
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pushl %ebx
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %ebx
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CFI_REL_OFFSET ebx, 0
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movl $(__USER_DS), %edx
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movl %edx, %ds
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@ -234,39 +221,29 @@
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.endm
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.macro RESTORE_INT_REGS
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popl %ebx
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CFI_ADJUST_CFA_OFFSET -4
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popl_cfi %ebx
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CFI_RESTORE ebx
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popl %ecx
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CFI_ADJUST_CFA_OFFSET -4
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popl_cfi %ecx
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CFI_RESTORE ecx
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popl %edx
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CFI_ADJUST_CFA_OFFSET -4
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popl_cfi %edx
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CFI_RESTORE edx
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popl %esi
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CFI_ADJUST_CFA_OFFSET -4
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popl_cfi %esi
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CFI_RESTORE esi
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popl %edi
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CFI_ADJUST_CFA_OFFSET -4
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popl_cfi %edi
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CFI_RESTORE edi
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popl %ebp
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CFI_ADJUST_CFA_OFFSET -4
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popl_cfi %ebp
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CFI_RESTORE ebp
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popl %eax
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CFI_ADJUST_CFA_OFFSET -4
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popl_cfi %eax
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CFI_RESTORE eax
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.endm
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.macro RESTORE_REGS pop=0
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RESTORE_INT_REGS
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1: popl %ds
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CFI_ADJUST_CFA_OFFSET -4
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1: popl_cfi %ds
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/*CFI_RESTORE ds;*/
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2: popl %es
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CFI_ADJUST_CFA_OFFSET -4
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2: popl_cfi %es
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/*CFI_RESTORE es;*/
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3: popl %fs
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CFI_ADJUST_CFA_OFFSET -4
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3: popl_cfi %fs
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/*CFI_RESTORE fs;*/
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POP_GS \pop
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.pushsection .fixup, "ax"
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@ -320,16 +297,12 @@
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ENTRY(ret_from_fork)
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CFI_STARTPROC
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pushl %eax
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %eax
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call schedule_tail
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GET_THREAD_INFO(%ebp)
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popl %eax
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CFI_ADJUST_CFA_OFFSET -4
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pushl $0x0202 # Reset kernel eflags
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CFI_ADJUST_CFA_OFFSET 4
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popfl
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CFI_ADJUST_CFA_OFFSET -4
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popl_cfi %eax
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pushl_cfi $0x0202 # Reset kernel eflags
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popfl_cfi
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jmp syscall_exit
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CFI_ENDPROC
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END(ret_from_fork)
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@ -409,29 +382,23 @@ sysenter_past_esp:
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* enough kernel state to call TRACE_IRQS_OFF can be called - but
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* we immediately enable interrupts at that point anyway.
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*/
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pushl $(__USER_DS)
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $(__USER_DS)
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/*CFI_REL_OFFSET ss, 0*/
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pushl %ebp
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %ebp
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CFI_REL_OFFSET esp, 0
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pushfl
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pushfl_cfi
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orl $X86_EFLAGS_IF, (%esp)
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CFI_ADJUST_CFA_OFFSET 4
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pushl $(__USER_CS)
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $(__USER_CS)
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/*CFI_REL_OFFSET cs, 0*/
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/*
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* Push current_thread_info()->sysenter_return to the stack.
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* A tiny bit of offset fixup is necessary - 4*4 means the 4 words
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* pushed above; +8 corresponds to copy_thread's esp0 setting.
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*/
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pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp)
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp)
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CFI_REL_OFFSET eip, 0
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pushl %eax
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %eax
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SAVE_ALL
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ENABLE_INTERRUPTS(CLBR_NONE)
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@ -486,8 +453,7 @@ sysenter_audit:
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movl %eax,%edx /* 2nd arg: syscall number */
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movl $AUDIT_ARCH_I386,%eax /* 1st arg: audit arch */
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call audit_syscall_entry
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pushl %ebx
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %ebx
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movl PT_EAX(%esp),%eax /* reload syscall number */
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jmp sysenter_do_call
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@ -529,8 +495,7 @@ ENDPROC(ia32_sysenter_target)
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# system call handler stub
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ENTRY(system_call)
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RING0_INT_FRAME # can't unwind into user space anyway
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pushl %eax # save orig_eax
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %eax # save orig_eax
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SAVE_ALL
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GET_THREAD_INFO(%ebp)
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# system call tracing in operation / emulation
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@ -566,7 +531,6 @@ restore_all_notrace:
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je ldt_ss # returning to user-space with LDT SS
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restore_nocheck:
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RESTORE_REGS 4 # skip orig_eax/error_code
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CFI_ADJUST_CFA_OFFSET -4
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irq_return:
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INTERRUPT_RETURN
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.section .fixup,"ax"
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@ -619,10 +583,8 @@ ldt_ss:
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shr $16, %edx
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mov %dl, GDT_ESPFIX_SS + 4 /* bits 16..23 */
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mov %dh, GDT_ESPFIX_SS + 7 /* bits 24..31 */
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pushl $__ESPFIX_SS
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CFI_ADJUST_CFA_OFFSET 4
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push %eax /* new kernel esp */
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $__ESPFIX_SS
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pushl_cfi %eax /* new kernel esp */
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/* Disable interrupts, but do not irqtrace this section: we
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* will soon execute iret and the tracer was already set to
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* the irqstate after the iret */
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@ -666,11 +628,9 @@ work_notifysig: # deal with pending signals and
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ALIGN
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work_notifysig_v86:
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pushl %ecx # save ti_flags for do_notify_resume
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi %ecx # save ti_flags for do_notify_resume
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call save_v86_state # %eax contains pt_regs pointer
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popl %ecx
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CFI_ADJUST_CFA_OFFSET -4
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popl_cfi %ecx
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movl %eax, %esp
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#else
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movl %esp, %eax
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@ -803,10 +763,8 @@ ENDPROC(ptregs_clone)
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mov GDT_ESPFIX_SS + 7, %ah /* bits 24..31 */
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shl $16, %eax
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addl %esp, %eax /* the adjusted stack pointer */
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pushl $__KERNEL_DS
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CFI_ADJUST_CFA_OFFSET 4
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pushl %eax
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $__KERNEL_DS
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pushl_cfi %eax
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lss (%esp), %esp /* switch to the normal stack segment */
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CFI_ADJUST_CFA_OFFSET -8
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.endm
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@ -843,8 +801,7 @@ vector=FIRST_EXTERNAL_VECTOR
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.if vector <> FIRST_EXTERNAL_VECTOR
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CFI_ADJUST_CFA_OFFSET -4
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.endif
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1: pushl $(~vector+0x80) /* Note: always in signed byte range */
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CFI_ADJUST_CFA_OFFSET 4
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1: pushl_cfi $(~vector+0x80) /* Note: always in signed byte range */
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.if ((vector-FIRST_EXTERNAL_VECTOR)%7) <> 6
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jmp 2f
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.endif
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@ -884,8 +841,7 @@ ENDPROC(common_interrupt)
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#define BUILD_INTERRUPT3(name, nr, fn) \
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ENTRY(name) \
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RING0_INT_FRAME; \
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pushl $~(nr); \
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CFI_ADJUST_CFA_OFFSET 4; \
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pushl_cfi $~(nr); \
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SAVE_ALL; \
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TRACE_IRQS_OFF \
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movl %esp,%eax; \
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@ -901,21 +857,18 @@ ENDPROC(name)
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ENTRY(coprocessor_error)
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RING0_INT_FRAME
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pushl $0
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CFI_ADJUST_CFA_OFFSET 4
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pushl $do_coprocessor_error
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $0
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pushl_cfi $do_coprocessor_error
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jmp error_code
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CFI_ENDPROC
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END(coprocessor_error)
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ENTRY(simd_coprocessor_error)
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RING0_INT_FRAME
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pushl $0
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $0
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#ifdef CONFIG_X86_INVD_BUG
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/* AMD 486 bug: invd from userspace calls exception 19 instead of #GP */
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661: pushl $do_general_protection
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661: pushl_cfi $do_general_protection
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662:
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.section .altinstructions,"a"
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.balign 4
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@ -930,19 +883,16 @@ ENTRY(simd_coprocessor_error)
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664:
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.previous
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#else
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pushl $do_simd_coprocessor_error
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pushl_cfi $do_simd_coprocessor_error
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#endif
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CFI_ADJUST_CFA_OFFSET 4
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jmp error_code
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CFI_ENDPROC
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END(simd_coprocessor_error)
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ENTRY(device_not_available)
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RING0_INT_FRAME
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pushl $-1 # mark this as an int
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CFI_ADJUST_CFA_OFFSET 4
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pushl $do_device_not_available
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $-1 # mark this as an int
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pushl_cfi $do_device_not_available
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jmp error_code
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CFI_ENDPROC
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END(device_not_available)
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@ -964,82 +914,68 @@ END(native_irq_enable_sysexit)
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ENTRY(overflow)
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RING0_INT_FRAME
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pushl $0
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CFI_ADJUST_CFA_OFFSET 4
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pushl $do_overflow
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $0
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pushl_cfi $do_overflow
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jmp error_code
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CFI_ENDPROC
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END(overflow)
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ENTRY(bounds)
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RING0_INT_FRAME
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pushl $0
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CFI_ADJUST_CFA_OFFSET 4
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pushl $do_bounds
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $0
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pushl_cfi $do_bounds
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jmp error_code
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CFI_ENDPROC
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END(bounds)
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ENTRY(invalid_op)
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RING0_INT_FRAME
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pushl $0
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CFI_ADJUST_CFA_OFFSET 4
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pushl $do_invalid_op
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $0
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pushl_cfi $do_invalid_op
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jmp error_code
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CFI_ENDPROC
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END(invalid_op)
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ENTRY(coprocessor_segment_overrun)
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RING0_INT_FRAME
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pushl $0
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CFI_ADJUST_CFA_OFFSET 4
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pushl $do_coprocessor_segment_overrun
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $0
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pushl_cfi $do_coprocessor_segment_overrun
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jmp error_code
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CFI_ENDPROC
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END(coprocessor_segment_overrun)
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ENTRY(invalid_TSS)
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RING0_EC_FRAME
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pushl $do_invalid_TSS
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $do_invalid_TSS
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jmp error_code
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CFI_ENDPROC
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END(invalid_TSS)
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ENTRY(segment_not_present)
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RING0_EC_FRAME
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pushl $do_segment_not_present
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $do_segment_not_present
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jmp error_code
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CFI_ENDPROC
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END(segment_not_present)
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ENTRY(stack_segment)
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RING0_EC_FRAME
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pushl $do_stack_segment
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $do_stack_segment
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jmp error_code
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CFI_ENDPROC
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END(stack_segment)
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ENTRY(alignment_check)
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RING0_EC_FRAME
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pushl $do_alignment_check
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $do_alignment_check
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jmp error_code
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CFI_ENDPROC
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END(alignment_check)
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ENTRY(divide_error)
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RING0_INT_FRAME
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pushl $0 # no error code
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CFI_ADJUST_CFA_OFFSET 4
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pushl $do_divide_error
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $0 # no error code
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pushl_cfi $do_divide_error
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jmp error_code
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CFI_ENDPROC
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END(divide_error)
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@ -1047,10 +983,8 @@ END(divide_error)
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#ifdef CONFIG_X86_MCE
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ENTRY(machine_check)
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RING0_INT_FRAME
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pushl $0
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CFI_ADJUST_CFA_OFFSET 4
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pushl machine_check_vector
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CFI_ADJUST_CFA_OFFSET 4
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pushl_cfi $0
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pushl_cfi machine_check_vector
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jmp error_code
|
||||
CFI_ENDPROC
|
||||
END(machine_check)
|
||||
@ -1058,10 +992,8 @@ END(machine_check)
|
||||
|
||||
ENTRY(spurious_interrupt_bug)
|
||||
RING0_INT_FRAME
|
||||
pushl $0
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl $do_spurious_interrupt_bug
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi $0
|
||||
pushl_cfi $do_spurious_interrupt_bug
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
END(spurious_interrupt_bug)
|
||||
@ -1092,8 +1024,7 @@ ENTRY(xen_sysenter_target)
|
||||
|
||||
ENTRY(xen_hypervisor_callback)
|
||||
CFI_STARTPROC
|
||||
pushl $0
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi $0
|
||||
SAVE_ALL
|
||||
TRACE_IRQS_OFF
|
||||
|
||||
@ -1129,23 +1060,20 @@ ENDPROC(xen_hypervisor_callback)
|
||||
# We distinguish between categories by maintaining a status value in EAX.
|
||||
ENTRY(xen_failsafe_callback)
|
||||
CFI_STARTPROC
|
||||
pushl %eax
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %eax
|
||||
movl $1,%eax
|
||||
1: mov 4(%esp),%ds
|
||||
2: mov 8(%esp),%es
|
||||
3: mov 12(%esp),%fs
|
||||
4: mov 16(%esp),%gs
|
||||
testl %eax,%eax
|
||||
popl %eax
|
||||
CFI_ADJUST_CFA_OFFSET -4
|
||||
popl_cfi %eax
|
||||
lea 16(%esp),%esp
|
||||
CFI_ADJUST_CFA_OFFSET -16
|
||||
jz 5f
|
||||
addl $16,%esp
|
||||
jmp iret_exc # EAX != 0 => Category 2 (Bad IRET)
|
||||
5: pushl $0 # EAX == 0 => Category 1 (Bad segment)
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
5: pushl_cfi $0 # EAX == 0 => Category 1 (Bad segment)
|
||||
SAVE_ALL
|
||||
jmp ret_from_exception
|
||||
CFI_ENDPROC
|
||||
@ -1295,40 +1223,29 @@ syscall_table_size=(.-sys_call_table)
|
||||
|
||||
ENTRY(page_fault)
|
||||
RING0_EC_FRAME
|
||||
pushl $do_page_fault
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi $do_page_fault
|
||||
ALIGN
|
||||
error_code:
|
||||
/* the function address is in %gs's slot on the stack */
|
||||
pushl %fs
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %fs
|
||||
/*CFI_REL_OFFSET fs, 0*/
|
||||
pushl %es
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %es
|
||||
/*CFI_REL_OFFSET es, 0*/
|
||||
pushl %ds
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %ds
|
||||
/*CFI_REL_OFFSET ds, 0*/
|
||||
pushl %eax
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %eax
|
||||
CFI_REL_OFFSET eax, 0
|
||||
pushl %ebp
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %ebp
|
||||
CFI_REL_OFFSET ebp, 0
|
||||
pushl %edi
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %edi
|
||||
CFI_REL_OFFSET edi, 0
|
||||
pushl %esi
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %esi
|
||||
CFI_REL_OFFSET esi, 0
|
||||
pushl %edx
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %edx
|
||||
CFI_REL_OFFSET edx, 0
|
||||
pushl %ecx
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %ecx
|
||||
CFI_REL_OFFSET ecx, 0
|
||||
pushl %ebx
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %ebx
|
||||
CFI_REL_OFFSET ebx, 0
|
||||
cld
|
||||
movl $(__KERNEL_PERCPU), %ecx
|
||||
@ -1370,12 +1287,9 @@ END(page_fault)
|
||||
movl TSS_sysenter_sp0 + \offset(%esp), %esp
|
||||
CFI_DEF_CFA esp, 0
|
||||
CFI_UNDEFINED eip
|
||||
pushfl
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl $__KERNEL_CS
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl $sysenter_past_esp
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushfl_cfi
|
||||
pushl_cfi $__KERNEL_CS
|
||||
pushl_cfi $sysenter_past_esp
|
||||
CFI_REL_OFFSET eip, 0
|
||||
.endm
|
||||
|
||||
@ -1385,8 +1299,7 @@ ENTRY(debug)
|
||||
jne debug_stack_correct
|
||||
FIX_STACK 12, debug_stack_correct, debug_esp_fix_insn
|
||||
debug_stack_correct:
|
||||
pushl $-1 # mark this as an int
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi $-1 # mark this as an int
|
||||
SAVE_ALL
|
||||
TRACE_IRQS_OFF
|
||||
xorl %edx,%edx # error code 0
|
||||
@ -1406,32 +1319,27 @@ END(debug)
|
||||
*/
|
||||
ENTRY(nmi)
|
||||
RING0_INT_FRAME
|
||||
pushl %eax
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %eax
|
||||
movl %ss, %eax
|
||||
cmpw $__ESPFIX_SS, %ax
|
||||
popl %eax
|
||||
CFI_ADJUST_CFA_OFFSET -4
|
||||
popl_cfi %eax
|
||||
je nmi_espfix_stack
|
||||
cmpl $ia32_sysenter_target,(%esp)
|
||||
je nmi_stack_fixup
|
||||
pushl %eax
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %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 %eax
|
||||
CFI_ADJUST_CFA_OFFSET -4
|
||||
popl_cfi %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 %eax
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %eax
|
||||
SAVE_ALL
|
||||
xorl %edx,%edx # zero error code
|
||||
movl %esp,%eax # pt_regs pointer
|
||||
@ -1460,18 +1368,14 @@ nmi_espfix_stack:
|
||||
*
|
||||
* create the pointer to lss back
|
||||
*/
|
||||
pushl %ss
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl %esp
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %ss
|
||||
pushl_cfi %esp
|
||||
addl $4, (%esp)
|
||||
/* copy the iret frame of 12 bytes */
|
||||
.rept 3
|
||||
pushl 16(%esp)
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi 16(%esp)
|
||||
.endr
|
||||
pushl %eax
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi %eax
|
||||
SAVE_ALL
|
||||
FIXUP_ESPFIX_STACK # %eax == %esp
|
||||
xorl %edx,%edx # zero error code
|
||||
@ -1485,8 +1389,7 @@ END(nmi)
|
||||
|
||||
ENTRY(int3)
|
||||
RING0_INT_FRAME
|
||||
pushl $-1 # mark this as an int
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi $-1 # mark this as an int
|
||||
SAVE_ALL
|
||||
TRACE_IRQS_OFF
|
||||
xorl %edx,%edx # zero error code
|
||||
@ -1498,8 +1401,7 @@ END(int3)
|
||||
|
||||
ENTRY(general_protection)
|
||||
RING0_EC_FRAME
|
||||
pushl $do_general_protection
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl_cfi $do_general_protection
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
END(general_protection)
|
||||
|
||||
@ -213,23 +213,17 @@ ENDPROC(native_usergs_sysret64)
|
||||
.macro FAKE_STACK_FRAME child_rip
|
||||
/* push in order ss, rsp, eflags, cs, rip */
|
||||
xorl %eax, %eax
|
||||
pushq $__KERNEL_DS /* ss */
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
pushq_cfi $__KERNEL_DS /* ss */
|
||||
/*CFI_REL_OFFSET ss,0*/
|
||||
pushq %rax /* rsp */
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
pushq_cfi %rax /* rsp */
|
||||
CFI_REL_OFFSET rsp,0
|
||||
pushq $X86_EFLAGS_IF /* eflags - interrupts on */
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
pushq_cfi $X86_EFLAGS_IF /* eflags - interrupts on */
|
||||
/*CFI_REL_OFFSET rflags,0*/
|
||||
pushq $__KERNEL_CS /* cs */
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
pushq_cfi $__KERNEL_CS /* cs */
|
||||
/*CFI_REL_OFFSET cs,0*/
|
||||
pushq \child_rip /* rip */
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
pushq_cfi \child_rip /* rip */
|
||||
CFI_REL_OFFSET rip,0
|
||||
pushq %rax /* orig rax */
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
pushq_cfi %rax /* orig rax */
|
||||
.endm
|
||||
|
||||
.macro UNFAKE_STACK_FRAME
|
||||
@ -398,10 +392,8 @@ ENTRY(ret_from_fork)
|
||||
|
||||
LOCK ; btr $TIF_FORK,TI_flags(%r8)
|
||||
|
||||
push kernel_eflags(%rip)
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
popf # reset kernel eflags
|
||||
CFI_ADJUST_CFA_OFFSET -8
|
||||
pushq_cfi kernel_eflags(%rip)
|
||||
popfq_cfi # reset kernel eflags
|
||||
|
||||
call schedule_tail # rdi: 'prev' task parameter
|
||||
|
||||
@ -521,11 +513,9 @@ sysret_careful:
|
||||
jnc sysret_signal
|
||||
TRACE_IRQS_ON
|
||||
ENABLE_INTERRUPTS(CLBR_NONE)
|
||||
pushq %rdi
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
pushq_cfi %rdi
|
||||
call schedule
|
||||
popq %rdi
|
||||
CFI_ADJUST_CFA_OFFSET -8
|
||||
popq_cfi %rdi
|
||||
jmp sysret_check
|
||||
|
||||
/* Handle a signal */
|
||||
@ -634,11 +624,9 @@ int_careful:
|
||||
jnc int_very_careful
|
||||
TRACE_IRQS_ON
|
||||
ENABLE_INTERRUPTS(CLBR_NONE)
|
||||
pushq %rdi
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
pushq_cfi %rdi
|
||||
call schedule
|
||||
popq %rdi
|
||||
CFI_ADJUST_CFA_OFFSET -8
|
||||
popq_cfi %rdi
|
||||
DISABLE_INTERRUPTS(CLBR_NONE)
|
||||
TRACE_IRQS_OFF
|
||||
jmp int_with_check
|
||||
@ -652,12 +640,10 @@ int_check_syscall_exit_work:
|
||||
/* Check for syscall exit trace */
|
||||
testl $_TIF_WORK_SYSCALL_EXIT,%edx
|
||||
jz int_signal
|
||||
pushq %rdi
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
pushq_cfi %rdi
|
||||
leaq 8(%rsp),%rdi # &ptregs -> arg1
|
||||
call syscall_trace_leave
|
||||
popq %rdi
|
||||
CFI_ADJUST_CFA_OFFSET -8
|
||||
popq_cfi %rdi
|
||||
andl $~(_TIF_WORK_SYSCALL_EXIT|_TIF_SYSCALL_EMU),%edi
|
||||
jmp int_restore_rest
|
||||
|
||||
@ -765,8 +751,7 @@ vector=FIRST_EXTERNAL_VECTOR
|
||||
.if vector <> FIRST_EXTERNAL_VECTOR
|
||||
CFI_ADJUST_CFA_OFFSET -8
|
||||
.endif
|
||||
1: pushq $(~vector+0x80) /* Note: always in signed byte range */
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
1: pushq_cfi $(~vector+0x80) /* Note: always in signed byte range */
|
||||
.if ((vector-FIRST_EXTERNAL_VECTOR)%7) <> 6
|
||||
jmp 2f
|
||||
.endif
|
||||
@ -821,6 +806,7 @@ ret_from_intr:
|
||||
TRACE_IRQS_OFF
|
||||
decl PER_CPU_VAR(irq_count)
|
||||
leaveq
|
||||
CFI_RESTORE rbp
|
||||
CFI_DEF_CFA_REGISTER rsp
|
||||
CFI_ADJUST_CFA_OFFSET -8
|
||||
exit_intr:
|
||||
@ -902,11 +888,9 @@ retint_careful:
|
||||
jnc retint_signal
|
||||
TRACE_IRQS_ON
|
||||
ENABLE_INTERRUPTS(CLBR_NONE)
|
||||
pushq %rdi
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
pushq_cfi %rdi
|
||||
call schedule
|
||||
popq %rdi
|
||||
CFI_ADJUST_CFA_OFFSET -8
|
||||
popq_cfi %rdi
|
||||
GET_THREAD_INFO(%rcx)
|
||||
DISABLE_INTERRUPTS(CLBR_NONE)
|
||||
TRACE_IRQS_OFF
|
||||
@ -955,8 +939,7 @@ END(common_interrupt)
|
||||
.macro apicinterrupt num sym do_sym
|
||||
ENTRY(\sym)
|
||||
INTR_FRAME
|
||||
pushq $~(\num)
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
pushq_cfi $~(\num)
|
||||
interrupt \do_sym
|
||||
jmp ret_from_intr
|
||||
CFI_ENDPROC
|
||||
@ -1138,16 +1121,14 @@ zeroentry simd_coprocessor_error do_simd_coprocessor_error
|
||||
/* edi: new selector */
|
||||
ENTRY(native_load_gs_index)
|
||||
CFI_STARTPROC
|
||||
pushf
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
pushfq_cfi
|
||||
DISABLE_INTERRUPTS(CLBR_ANY & ~CLBR_RDI)
|
||||
SWAPGS
|
||||
gs_change:
|
||||
movl %edi,%gs
|
||||
2: mfence /* workaround */
|
||||
SWAPGS
|
||||
popf
|
||||
CFI_ADJUST_CFA_OFFSET -8
|
||||
popfq_cfi
|
||||
ret
|
||||
CFI_ENDPROC
|
||||
END(native_load_gs_index)
|
||||
@ -1214,8 +1195,7 @@ END(kernel_execve)
|
||||
/* Call softirq on interrupt stack. Interrupts are off. */
|
||||
ENTRY(call_softirq)
|
||||
CFI_STARTPROC
|
||||
push %rbp
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
pushq_cfi %rbp
|
||||
CFI_REL_OFFSET rbp,0
|
||||
mov %rsp,%rbp
|
||||
CFI_DEF_CFA_REGISTER rbp
|
||||
@ -1224,6 +1204,7 @@ ENTRY(call_softirq)
|
||||
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)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user