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comparison packages/hal/i386/arch/current/src/hal_misc.c @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
parents 435cced73e2f
children ac086aa3217e
comparison
equal deleted inserted replaced
114:5ad2b71d525e 115:6ed91473a1cd
47 #include <cyg/infra/cyg_type.h> 47 #include <cyg/infra/cyg_type.h>
48 48
49 #include <cyg/hal/hal_arch.h> 49 #include <cyg/hal/hal_arch.h>
50 50
51 void hal_zero_bss(void) 51 void hal_zero_bss(void)
52 { extern char _end ; 52 { extern char __bss_end ;
53 extern char __bss_start ; 53 extern char __bss_start ;
54 54
55 asm( 55 asm(
56 "movl %0, %%ecx;" /* Get the address of _end */ 56 "movl %0, %%ecx;" /* Get the address of _end */
57 "movl %1, %%edi;" /* Address of __bss_start */ 57 "movl %1, %%edi;" /* Address of __bss_start */
60 "shr $2, %%ecx;" /* Divide by 4: we'll fill 32-bit words. */ 60 "shr $2, %%ecx;" /* Divide by 4: we'll fill 32-bit words. */
61 "xorl %%eax, %%eax;" /* Store zeros. */ 61 "xorl %%eax, %%eax;" /* Store zeros. */
62 "rep 62 "rep
63 stosl" /* Fill the region. */ 63 stosl" /* Fill the region. */
64 : /* No outputs. */ 64 : /* No outputs. */
65 : "g" (&_end), "g" (&__bss_start) 65 : "g" (&__bss_end), "g" (&__bss_start)
66 : "ecx", "edi", "eax" 66 : "ecx", "edi", "eax"
67 ); 67 );
68 } 68 }
69 69
70 //--------------------------------------------------------------------------- 70 //---------------------------------------------------------------------------