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https://github.com/edk2-porting/linux-next.git
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[PATCH] i386: Add dwarf2 annotations to *_user and checksum functions
Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Jan Beulich
Andi Kleen
parent
3755090722
commit
00e065ea58
@ -25,6 +25,8 @@
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/linkage.h>
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#include <asm/dwarf2.h>
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#include <asm/errno.h>
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/*
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@ -36,8 +38,6 @@ unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum)
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*/
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.text
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.align 4
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.globl csum_partial
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#ifndef CONFIG_X86_USE_PPRO_CHECKSUM
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@ -48,9 +48,14 @@ unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum)
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* Fortunately, it is easy to convert 2-byte alignment to 4-byte
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* alignment for the unrolled loop.
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*/
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csum_partial:
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ENTRY(csum_partial)
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CFI_STARTPROC
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pushl %esi
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET esi, 0
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pushl %ebx
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET ebx, 0
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movl 20(%esp),%eax # Function arg: unsigned int sum
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movl 16(%esp),%ecx # Function arg: int len
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movl 12(%esp),%esi # Function arg: unsigned char *buff
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@ -128,16 +133,27 @@ csum_partial:
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roll $8, %eax
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8:
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popl %ebx
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CFI_ADJUST_CFA_OFFSET -4
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CFI_RESTORE ebx
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popl %esi
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CFI_ADJUST_CFA_OFFSET -4
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CFI_RESTORE esi
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ret
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CFI_ENDPROC
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ENDPROC(csum_partial)
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#else
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/* Version for PentiumII/PPro */
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csum_partial:
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ENTRY(csum_partial)
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CFI_STARTPROC
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pushl %esi
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET esi, 0
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pushl %ebx
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET ebx, 0
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movl 20(%esp),%eax # Function arg: unsigned int sum
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movl 16(%esp),%ecx # Function arg: int len
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movl 12(%esp),%esi # Function arg: const unsigned char *buf
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@ -245,8 +261,14 @@ csum_partial:
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roll $8, %eax
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90:
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popl %ebx
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CFI_ADJUST_CFA_OFFSET -4
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CFI_RESTORE ebx
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popl %esi
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CFI_ADJUST_CFA_OFFSET -4
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CFI_RESTORE esi
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ret
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CFI_ENDPROC
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ENDPROC(csum_partial)
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#endif
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@ -278,19 +300,24 @@ unsigned int csum_partial_copy_generic (const char *src, char *dst,
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.long 9999b, 6002f ; \
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.previous
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.align 4
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.globl csum_partial_copy_generic
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#ifndef CONFIG_X86_USE_PPRO_CHECKSUM
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#define ARGBASE 16
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#define FP 12
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csum_partial_copy_generic:
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ENTRY(csum_partial_copy_generic)
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CFI_STARTPROC
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subl $4,%esp
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CFI_ADJUST_CFA_OFFSET 4
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pushl %edi
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CFI_ADJUST_CFA_OFFSET 4
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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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CFI_REL_OFFSET esi, 0
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pushl %ebx
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET ebx, 0
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movl ARGBASE+16(%esp),%eax # sum
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movl ARGBASE+12(%esp),%ecx # len
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movl ARGBASE+4(%esp),%esi # src
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@ -400,10 +427,19 @@ DST( movb %cl, (%edi) )
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.previous
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popl %ebx
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CFI_ADJUST_CFA_OFFSET -4
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CFI_RESTORE ebx
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popl %esi
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CFI_ADJUST_CFA_OFFSET -4
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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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CFI_RESTORE edi
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popl %ecx # equivalent to addl $4,%esp
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CFI_ADJUST_CFA_OFFSET -4
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ret
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CFI_ENDPROC
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ENDPROC(csum_partial_copy_generic)
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#else
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@ -421,10 +457,17 @@ DST( movb %cl, (%edi) )
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#define ARGBASE 12
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csum_partial_copy_generic:
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ENTRY(csum_partial_copy_generic)
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CFI_STARTPROC
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pushl %ebx
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET ebx, 0
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pushl %edi
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CFI_ADJUST_CFA_OFFSET 4
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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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CFI_REL_OFFSET esi, 0
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movl ARGBASE+4(%esp),%esi #src
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movl ARGBASE+8(%esp),%edi #dst
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movl ARGBASE+12(%esp),%ecx #len
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@ -485,9 +528,17 @@ DST( movb %dl, (%edi) )
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.previous
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popl %esi
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CFI_ADJUST_CFA_OFFSET -4
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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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CFI_RESTORE edi
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popl %ebx
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CFI_ADJUST_CFA_OFFSET -4
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CFI_RESTORE ebx
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ret
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CFI_ENDPROC
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ENDPROC(csum_partial_copy_generic)
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#undef ROUND
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#undef ROUND1
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@ -8,6 +8,8 @@
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* return an error value in addition to the "real"
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* return value.
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*/
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#include <linux/linkage.h>
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#include <asm/dwarf2.h>
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#include <asm/thread_info.h>
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@ -24,19 +26,19 @@
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*/
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.text
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.align 4
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.globl __get_user_1
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__get_user_1:
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ENTRY(__get_user_1)
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CFI_STARTPROC
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GET_THREAD_INFO(%edx)
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cmpl TI_addr_limit(%edx),%eax
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jae bad_get_user
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1: movzbl (%eax),%edx
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xorl %eax,%eax
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ret
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CFI_ENDPROC
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ENDPROC(__get_user_1)
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.align 4
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.globl __get_user_2
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__get_user_2:
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ENTRY(__get_user_2)
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CFI_STARTPROC
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addl $1,%eax
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jc bad_get_user
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GET_THREAD_INFO(%edx)
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@ -45,10 +47,11 @@ __get_user_2:
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2: movzwl -1(%eax),%edx
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xorl %eax,%eax
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ret
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CFI_ENDPROC
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ENDPROC(__get_user_2)
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.align 4
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.globl __get_user_4
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__get_user_4:
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ENTRY(__get_user_4)
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CFI_STARTPROC
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addl $3,%eax
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jc bad_get_user
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GET_THREAD_INFO(%edx)
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@ -57,11 +60,16 @@ __get_user_4:
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3: movl -3(%eax),%edx
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xorl %eax,%eax
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ret
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CFI_ENDPROC
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ENDPROC(__get_user_4)
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bad_get_user:
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CFI_STARTPROC
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xorl %edx,%edx
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movl $-14,%eax
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ret
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CFI_ENDPROC
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END(bad_get_user)
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.section __ex_table,"a"
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.long 1b,bad_get_user
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@ -8,6 +8,8 @@
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* return an error value in addition to the "real"
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* return value.
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*/
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#include <linux/linkage.h>
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#include <asm/dwarf2.h>
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#include <asm/thread_info.h>
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@ -23,23 +25,28 @@
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* as they get called from within inline assembly.
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*/
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#define ENTER pushl %ebx ; GET_THREAD_INFO(%ebx)
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#define EXIT popl %ebx ; ret
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#define ENTER CFI_STARTPROC ; \
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pushl %ebx ; \
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CFI_ADJUST_CFA_OFFSET 4 ; \
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CFI_REL_OFFSET ebx, 0 ; \
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GET_THREAD_INFO(%ebx)
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#define EXIT popl %ebx ; \
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CFI_ADJUST_CFA_OFFSET -4 ; \
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CFI_RESTORE ebx ; \
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ret ; \
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CFI_ENDPROC
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.text
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.align 4
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.globl __put_user_1
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__put_user_1:
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ENTRY(__put_user_1)
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ENTER
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cmpl TI_addr_limit(%ebx),%ecx
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jae bad_put_user
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1: movb %al,(%ecx)
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xorl %eax,%eax
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EXIT
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ENDPROC(__put_user_1)
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.align 4
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.globl __put_user_2
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__put_user_2:
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ENTRY(__put_user_2)
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ENTER
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movl TI_addr_limit(%ebx),%ebx
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subl $1,%ebx
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@ -48,10 +55,9 @@ __put_user_2:
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2: movw %ax,(%ecx)
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xorl %eax,%eax
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EXIT
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ENDPROC(__put_user_2)
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.align 4
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.globl __put_user_4
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__put_user_4:
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ENTRY(__put_user_4)
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ENTER
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movl TI_addr_limit(%ebx),%ebx
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subl $3,%ebx
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@ -60,10 +66,9 @@ __put_user_4:
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3: movl %eax,(%ecx)
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xorl %eax,%eax
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EXIT
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ENDPROC(__put_user_4)
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.align 4
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.globl __put_user_8
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__put_user_8:
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ENTRY(__put_user_8)
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ENTER
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movl TI_addr_limit(%ebx),%ebx
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subl $7,%ebx
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@ -73,10 +78,16 @@ __put_user_8:
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5: movl %edx,4(%ecx)
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xorl %eax,%eax
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EXIT
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ENDPROC(__put_user_8)
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bad_put_user:
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CFI_STARTPROC simple
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CFI_DEF_CFA esp, 2*4
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CFI_OFFSET eip, -1*4
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CFI_OFFSET ebx, -2*4
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movl $-14,%eax
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EXIT
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END(bad_put_user)
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.section __ex_table,"a"
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.long 1b,bad_put_user
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