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Date: Thu, 21 May 2009 01:18:03 +0200 From: Alexander van Heukelum <heukelum@...tmail.fm> To: Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org> Cc: Jan Beulich <JBeulich@...ell.com>, "H. Peter Anvin" <hpa@...or.com>, Cyrill Gorcunov <gorcunov@...il.com>, Alexander van Heukelum <heukelum@...tmail.fm> Subject: [PATCH] i386, entry_32: introduce zeroentry and errorentry macros Introduce zeroentry and errorentry macros en remove source code duplication. Object code unchanged impact: introduction of zeroentry/errorentry macros Signed-off-by: Alexander van Heukelum <heukelum@...tmail.fm> --- arch/x86/kernel/entry_32.S | 185 ++++++++++---------------------------------- 1 files changed, 41 insertions(+), 144 deletions(-) diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S index 3c04063..29dcd74 100644 --- a/arch/x86/kernel/entry_32.S +++ b/arch/x86/kernel/entry_32.S @@ -307,6 +307,31 @@ CFI_OFFSET ebx, PT_EBX-PT_OLDESP .endm +/* + * Exception entry points. + */ +.macro zeroentry sym do_sym errorcode=0 +ENTRY(\sym) + RING0_INT_FRAME + pushl $\errorcode + CFI_ADJUST_CFA_OFFSET 4 + pushl $\do_sym + CFI_ADJUST_CFA_OFFSET 4 + jmp error_code + CFI_ENDPROC +END(\sym) +.endm + +.macro errorentry sym do_sym +ENTRY(\sym) + RING0_EC_FRAME + pushl $\do_sym + CFI_ADJUST_CFA_OFFSET 4 + jmp error_code + CFI_ENDPROC +END(\sym) +.endm + ENTRY(ret_from_fork) CFI_STARTPROC pushl %eax @@ -800,35 +825,9 @@ ENDPROC(name) /* The include is where all of the SMP etc. interrupts come from */ #include <asm/entry_arch.h> -ENTRY(coprocessor_error) - RING0_INT_FRAME - pushl $0 - CFI_ADJUST_CFA_OFFSET 4 - pushl $do_coprocessor_error - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(coprocessor_error) - -ENTRY(simd_coprocessor_error) - RING0_INT_FRAME - pushl $0 - CFI_ADJUST_CFA_OFFSET 4 - pushl $do_simd_coprocessor_error - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(simd_coprocessor_error) - -ENTRY(device_not_available) - RING0_INT_FRAME - pushl $-1 # mark this as an int - CFI_ADJUST_CFA_OFFSET 4 - pushl $do_device_not_available - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(device_not_available) +zeroentry coprocessor_error do_coprocessor_error +zeroentry simd_coprocessor_error do_simd_coprocessor_error +zeroentry device_not_available do_device_not_available -1 #ifdef CONFIG_PARAVIRT ENTRY(native_iret) @@ -845,109 +844,19 @@ ENTRY(native_irq_enable_sysexit) END(native_irq_enable_sysexit) #endif -ENTRY(overflow) - RING0_INT_FRAME - pushl $0 - CFI_ADJUST_CFA_OFFSET 4 - pushl $do_overflow - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(overflow) - -ENTRY(bounds) - RING0_INT_FRAME - pushl $0 - CFI_ADJUST_CFA_OFFSET 4 - pushl $do_bounds - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(bounds) - -ENTRY(invalid_op) - RING0_INT_FRAME - pushl $0 - CFI_ADJUST_CFA_OFFSET 4 - pushl $do_invalid_op - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(invalid_op) - -ENTRY(coprocessor_segment_overrun) - RING0_INT_FRAME - pushl $0 - CFI_ADJUST_CFA_OFFSET 4 - pushl $do_coprocessor_segment_overrun - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(coprocessor_segment_overrun) - -ENTRY(invalid_TSS) - RING0_EC_FRAME - pushl $do_invalid_TSS - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(invalid_TSS) - -ENTRY(segment_not_present) - RING0_EC_FRAME - pushl $do_segment_not_present - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(segment_not_present) - -ENTRY(stack_segment) - RING0_EC_FRAME - pushl $do_stack_segment - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(stack_segment) - -ENTRY(alignment_check) - RING0_EC_FRAME - pushl $do_alignment_check - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(alignment_check) - -ENTRY(divide_error) - RING0_INT_FRAME - pushl $0 # no error code - CFI_ADJUST_CFA_OFFSET 4 - pushl $do_divide_error - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(divide_error) - +zeroentry overflow do_overflow +zeroentry bounds do_bounds +zeroentry invalid_op do_invalid_op +zeroentry coprocessor_segment_overrun do_coprocessor_segment_overrun +errorentry invalid_TSS do_invalid_TSS +errorentry segment_not_present do_segment_not_present +errorentry stack_segment do_stack_segment +errorentry alignment_check do_alignment_check +zeroentry divide_error do_divide_error #ifdef CONFIG_X86_MCE -ENTRY(machine_check) - RING0_INT_FRAME - pushl $0 - CFI_ADJUST_CFA_OFFSET 4 - pushl $do_machine_check - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(machine_check) +zeroentry machine_check do_machine_check #endif - -ENTRY(spurious_interrupt_bug) - RING0_INT_FRAME - pushl $0 - CFI_ADJUST_CFA_OFFSET 4 - pushl $do_spurious_interrupt_bug - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(spurious_interrupt_bug) +zeroentry spurious_interrupt_bug do_spurious_interrupt_bug ENTRY(kernel_thread_helper) pushl $0 # fake return address for unwinder @@ -1174,13 +1083,7 @@ syscall_table_size=(.-sys_call_table) */ .pushsection .kprobes.text, "ax" -ENTRY(page_fault) - RING0_EC_FRAME - pushl $do_page_fault - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(page_fault) +errorentry page_fault do_page_fault ENTRY(error_code) RING0_EC_FRAME @@ -1382,13 +1285,7 @@ ENTRY(int3) CFI_ENDPROC END(int3) -ENTRY(general_protection) - RING0_EC_FRAME - pushl $do_general_protection - CFI_ADJUST_CFA_OFFSET 4 - jmp error_code - CFI_ENDPROC -END(general_protection) +errorentry general_protection do_general_protection /* * End of kprobes section -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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