45 lines
980 B
C
Executable File
45 lines
980 B
C
Executable File
/* kptr.c - Helper functions to use kernel pointer handles */
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/* Written 2000 by Werner Almesberger, EPFL ICA */
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#include <stdlib.h>
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#include <assert.h>
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#include <atm.h>
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#include "atmd.h"
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int kptr_eq(const atm_kptr_t *a,const atm_kptr_t *b)
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{
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unsigned long *_a = (unsigned long *) a,*_b = (unsigned long *) b;
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assert(sizeof(atm_kptr_t) == 8);
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switch (sizeof(unsigned long)) {
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case 2: /* Wow, ATM on ELKS ? :-) */
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if (_a[2] != _b[2]) return 0;
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if (_a[3] != _b[3]) return 0;
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case 4:
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if (_a[1] != _b[1]) return 0;
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case 8:
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return *_a == *_b;
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default:
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abort();
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}
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}
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const char *kptr_print(const atm_kptr_t *p)
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{
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static char buf[KPRT_PRINT_BUFS][sizeof(atm_kptr_t)*2+1];
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static int curr_buf = 0;
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char *result;
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int i;
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result = buf[curr_buf];
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curr_buf = (curr_buf+1) & (KPRT_PRINT_BUFS-1);
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for (i = 0; i < sizeof(atm_kptr_t); i++)
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sprintf(result+2*i,"%02x",((unsigned char *) p)[i]);
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return result;
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}
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