diff options
Diffstat (limited to 'libc/sysdeps/i386/i686/strtok.S')
| -rw-r--r-- | libc/sysdeps/i386/i686/strtok.S | 60 |
1 files changed, 12 insertions, 48 deletions
diff --git a/libc/sysdeps/i386/i686/strtok.S b/libc/sysdeps/i386/i686/strtok.S index 794efbaed..8848faf4d 100644 --- a/libc/sysdeps/i386/i686/strtok.S +++ b/libc/sysdeps/i386/i686/strtok.S @@ -20,8 +20,6 @@ #include <sysdep.h> #include "asm-syntax.h" -#include "bp-sym.h" -#include "bp-asm.h" /* This file can be used for three variants of the strtok function: @@ -46,11 +44,7 @@ .type save_ptr, @object .size save_ptr, 4 save_ptr: -# if __BOUNDED_POINTERS__ - .space 12 -# else .space 4 -# endif # ifdef PIC # define SAVE_PTR save_ptr@GOTOFF(%ebx) @@ -62,15 +56,15 @@ save_ptr: #endif #if !defined USE_AS_STRTOK_R && defined PIC -# define PARMS LINKAGE+256+4 /* space for table and saved PIC register */ +# define PARMS 4+256+4 /* space for table and saved PIC register */ #else -# define PARMS LINKAGE+256 /* space for table */ +# define PARMS 4+256 /* space for table */ #endif #define RTN PARMS -#define STR RTN+RTN_SIZE -#define DELIM STR+PTR_SIZE +#define STR RTN +#define DELIM STR+4 #ifdef USE_AS_STRTOK_R -# define SAVE DELIM+PTR_SIZE +# define SAVE DELIM+4 #endif .text @@ -80,8 +74,7 @@ save_ptr: ret #endif -ENTRY (BP_SYM (FUNCTION)) - ENTER +ENTRY (FUNCTION) #if !defined USE_AS_STRTOK_R && defined PIC pushl %ebx /* Save PIC register. */ @@ -127,23 +120,7 @@ ENTRY (BP_SYM (FUNCTION)) cmove %eax, %edx testl %edx, %edx jz L(returnNULL) -#if __BOUNDED_POINTERS__ -# ifdef USE_AS_STRTOK_R - movl SAVE(%esp), %ecx /* borrow %ecx for a moment */ -# endif - je L(0) - /* Save bounds of incoming non-NULL STR into save area. */ - movl 4+STR(%esp), %eax - movl %eax, 4+SAVE_PTR - movl 8+STR(%esp), %eax - movl %eax, 8+SAVE_PTR -L(0): CHECK_BOUNDS_LOW (%edx, SAVE_PTR) -# ifdef USE_AS_STRTOK_R - xorl %ecx, %ecx /* restore %ecx to zero */ -# endif -#endif movl DELIM(%esp), %eax /* Get start of delimiter set. */ - CHECK_BOUNDS_LOW (%eax, DELIM(%esp)) /* For understanding the following code remember that %ecx == 0 now. Although all the following instruction only modify %cl we always @@ -151,17 +128,17 @@ L(0): CHECK_BOUNDS_LOW (%edx, SAVE_PTR) L(2): movb (%eax), %cl /* get byte from stopset */ testb %cl, %cl /* is NUL char? */ - jz L(1_1) /* yes => start compare loop */ + jz L(1) /* yes => start compare loop */ movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */ movb 1(%eax), %cl /* get byte from stopset */ testb $0xff, %cl /* is NUL char? */ - jz L(1_2) /* yes => start compare loop */ + jz L(1) /* yes => start compare loop */ movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */ movb 2(%eax), %cl /* get byte from stopset */ testb $0xff, %cl /* is NUL char? */ - jz L(1_3) /* yes => start compare loop */ + jz L(1) /* yes => start compare loop */ movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */ movb 3(%eax), %cl /* get byte from stopset */ @@ -170,16 +147,7 @@ L(2): movb (%eax), %cl /* get byte from stopset */ testb $0xff, %cl /* is NUL char? */ jnz L(2) /* no => process next dword from stopset */ -#if __BOUNDED_POINTERS__ - jmp L(1_0) /* pointer is correct for bounds check */ -L(1_3): incl %eax /* adjust pointer for bounds check */ -L(1_2): incl %eax /* ditto */ -L(1_1): incl %eax /* ditto */ -L(1_0): CHECK_BOUNDS_HIGH (%eax, DELIM(%esp), jbe) -#else -L(1_3):; L(1_2):; L(1_1): /* fall through */ -#endif - leal -4(%edx), %eax /* prepare loop */ +L(1): leal -4(%edx), %eax /* prepare loop */ /* We use a neat trick for the following loop. Normally we would have to test for two termination conditions @@ -253,8 +221,6 @@ L(8): cmpl %eax, %edx movl SAVE(%esp), %ecx #endif movl %edx, SAVE_PTR - CHECK_BOUNDS_HIGH (%edx, SAVE_PTR, jb) - RETURN_BOUNDED_POINTER (SAVE_PTR) L(epilogue): /* Remove the stopset table. */ @@ -265,8 +231,7 @@ L(epilogue): cfi_adjust_cfa_offset (-4) cfi_restore (ebx) #endif - LEAVE - RET_PTR + ret L(returnNULL): xorl %eax, %eax @@ -274,7 +239,6 @@ L(returnNULL): movl SAVE(%esp), %ecx #endif movl %edx, SAVE_PTR - RETURN_NULL_BOUNDED_POINTER jmp L(epilogue) -END (BP_SYM (FUNCTION)) +END (FUNCTION) |