--- /dev/null
+/*
+ * util.c: Commonly used utility functions.
+ *
+ * Leendert van Doorn, leendert@watson.ibm.com
+ * Copyright (c) 2005, International Business Machines Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ */
+#include <stdarg.h>
+
+#include "util.h"
+#include "machine.h"
+
+#define isdigit(c) ((c) >= '0' && (c) <= '9')
+#define min(a, b) ((a) < (b) ? (a) : (b))
+
+static void putchar(int);
+static char *printnum(char *, unsigned long, int);
+static void _doprint(void (*)(int), char const *, va_list);
+
+
+void
+dump_regs(struct regs *regs)
+{
+ printf("eax %8x ecx %8x edx %8x ebx %8x\n",
+ regs->eax, regs->ecx, regs->edx, regs->ebx);
+ printf("esp %8x ebp %8x esi %8x edi %8x\n",
+ regs->esp, regs->ebp, regs->esi, regs->edi);
+ printf("eip %8x eflags %8x cs %8x ds %8x\n",
+ regs->eip, regs->eflags, regs->cs, regs->ds);
+ printf("es %8x fs %8x uss %8x uesp %8x\n",
+ regs->es, regs->fs, regs->uss, regs->uesp);
+ printf("ves %8x vds %8x vfs %8x vgs %8x\n",
+ regs->ves, regs->vds, regs->vfs, regs->vgs);
+ if (regs->trapno != -1 || regs->errno != -1)
+ printf("trapno %8x errno %8x\n", regs->trapno, regs->errno);
+
+ printf("cr0 %8lx cr2 %8x cr3 %8lx cr4 %8lx\n",
+ (long)oldctx.cr0, get_cr2(),
+ (long)oldctx.cr3, (long)oldctx.cr4);
+}
+
+#ifdef DEBUG
+void
+hexdump(unsigned char *data, int sz)
+{
+ unsigned char *d;
+ int i;
+
+ for (d = data; sz > 0; d += 16, sz -= 16) {
+ int n = sz > 16 ? 16 : sz;
+
+ printf("%08x: ", (unsigned)d);
+ for (i = 0; i < n; i++)
+ printf("%02x%c", d[i], i == 7 ? '-' : ' ');
+ for (; i < 16; i++)
+ printf(" %c", i == 7 ? '-' : ' ');
+ printf(" ");
+ for (i = 0; i < n; i++)
+ printf("%c", d[i] >= ' ' && d[i] <= '~' ? d[i] : '.');
+ printf("\n");
+ }
+}
+
+void
+print_e820_map(struct e820entry *map, int entries)
+{
+ struct e820entry *m;
+
+ if (entries > 32)
+ entries = 32;
+
+ for (m = map; m < &map[entries]; m++) {
+ printf("%08lx%08lx - %08lx%08lx ",
+ (unsigned long) (m->addr >> 32),
+ (unsigned long) (m->addr),
+ (unsigned long) ((m->addr+m->size) >> 32),
+ (unsigned long) ((m->addr+m->size)));
+
+ switch (m->type) {
+ case E820_RAM:
+ printf("(RAM)\n"); break;
+ case E820_RESERVED:
+ printf("(Reserved)\n"); break;
+ case E820_ACPI:
+ printf("(ACPI Data)\n"); break;
+ case E820_NVS:
+ printf("(ACPI NVS)\n"); break;
+ default:
+ printf("(Type %ld)\n", m->type); break;
+ }
+ }
+}
+
+void
+dump_dtr(unsigned long addr, unsigned long size)
+{
+ unsigned long long entry;
+ unsigned long base, limit;
+ int i;
+
+ for (i = 0; i < size; i += 8) {
+ entry = ((unsigned long long *) addr)[i >> 3];
+ base = (((entry >> (56-24)) & 0xFF000000) |
+ ((entry >> (32-16)) & 0x00FF0000) |
+ ((entry >> ( 16)) & 0x0000FFFF));
+ limit = (((entry >> (48-16)) & 0x000F0000) |
+ ((entry ) & 0x0000FFFF));
+ if (entry & (1ULL << (23+32))) /* G */
+ limit = (limit << 12) | 0xFFF;
+
+ printf("[0x%x] = 0x%08x%08x, base 0x%lx, limit 0x%lx\n", i,
+ (unsigned)(entry >> 32), (unsigned)(entry),
+ base, limit);
+ }
+}
+
+void
+dump_vmx_context(struct vmx_assist_context *c)
+{
+ printf("eip 0x%lx, esp 0x%lx, eflags 0x%lx\n",
+ (long) c->eip, (long) c->esp, (long) c->eflags);
+
+ printf("cr0 0x%lx, cr3 0x%lx, cr4 0x%lx\n",
+ (long)c->cr0, (long)c->cr3, (long)c->cr4);
+
+ printf("idtr: limit 0x%lx, base 0x%lx\n",
+ (long)c->idtr_limit, (long)c->idtr_base);
+
+ printf("gdtr: limit 0x%lx, base 0x%lx\n",
+ (long)c->gdtr_limit, (long)c->gdtr_base);
+
+ printf("cs: sel 0x%lx, limit 0x%lx, base 0x%lx\n",
+ (long)c->cs_sel, (long)c->cs_limit, (long)c->cs_base);
+ printf("\ttype %d, s %d, dpl %d, p %d, avl %d, ops %d, g %d, nul %d\n",
+ c->cs_arbytes.fields.seg_type,
+ c->cs_arbytes.fields.s,
+ c->cs_arbytes.fields.dpl,
+ c->cs_arbytes.fields.p,
+ c->cs_arbytes.fields.avl,
+ c->cs_arbytes.fields.default_ops_size,
+ c->cs_arbytes.fields.g,
+ c->cs_arbytes.fields.null_bit);
+
+ printf("ds: sel 0x%lx, limit 0x%lx, base 0x%lx\n",
+ (long)c->ds_sel, (long)c->ds_limit, (long)c->ds_base);
+ printf("\ttype %d, s %d, dpl %d, p %d, avl %d, ops %d, g %d, nul %d\n",
+ c->ds_arbytes.fields.seg_type,
+ c->ds_arbytes.fields.s,
+ c->ds_arbytes.fields.dpl,
+ c->ds_arbytes.fields.p,
+ c->ds_arbytes.fields.avl,
+ c->ds_arbytes.fields.default_ops_size,
+ c->ds_arbytes.fields.g,
+ c->ds_arbytes.fields.null_bit);
+
+ printf("es: sel 0x%lx, limit 0x%lx, base 0x%lx\n",
+ (long)c->es_sel, (long)c->es_limit, (long)c->es_base);
+ printf("\ttype %d, s %d, dpl %d, p %d, avl %d, ops %d, g %d, nul %d\n",
+ c->es_arbytes.fields.seg_type,
+ c->es_arbytes.fields.s,
+ c->es_arbytes.fields.dpl,
+ c->es_arbytes.fields.p,
+ c->es_arbytes.fields.avl,
+ c->es_arbytes.fields.default_ops_size,
+ c->es_arbytes.fields.g,
+ c->es_arbytes.fields.null_bit);
+
+ printf("ss: sel 0x%lx, limit 0x%lx, base 0x%lx\n",
+ (long)c->ss_sel, (long)c->ss_limit, (long)c->ss_base);
+ printf("\ttype %d, s %d, dpl %d, p %d, avl %d, ops %d, g %d, nul %d\n",
+ c->ss_arbytes.fields.seg_type,
+ c->ss_arbytes.fields.s,
+ c->ss_arbytes.fields.dpl,
+ c->ss_arbytes.fields.p,
+ c->ss_arbytes.fields.avl,
+ c->ss_arbytes.fields.default_ops_size,
+ c->ss_arbytes.fields.g,
+ c->ss_arbytes.fields.null_bit);
+
+ printf("fs: sel 0x%lx, limit 0x%lx, base 0x%lx\n",
+ (long)c->fs_sel, (long)c->fs_limit, (long)c->fs_base);
+ printf("\ttype %d, s %d, dpl %d, p %d, avl %d, ops %d, g %d, nul %d\n",
+ c->fs_arbytes.fields.seg_type,
+ c->fs_arbytes.fields.s,
+ c->fs_arbytes.fields.dpl,
+ c->fs_arbytes.fields.p,
+ c->fs_arbytes.fields.avl,
+ c->fs_arbytes.fields.default_ops_size,
+ c->fs_arbytes.fields.g,
+ c->fs_arbytes.fields.null_bit);
+
+ printf("gs: sel 0x%lx, limit 0x%lx, base 0x%lx\n",
+ (long)c->gs_sel, (long)c->gs_limit, (long)c->gs_base);
+ printf("\ttype %d, s %d, dpl %d, p %d, avl %d, ops %d, g %d, nul %d\n",
+ c->gs_arbytes.fields.seg_type,
+ c->gs_arbytes.fields.s,
+ c->gs_arbytes.fields.dpl,
+ c->gs_arbytes.fields.p,
+ c->gs_arbytes.fields.avl,
+ c->gs_arbytes.fields.default_ops_size,
+ c->gs_arbytes.fields.g,
+ c->gs_arbytes.fields.null_bit);
+
+ printf("tr: sel 0x%lx, limit 0x%lx, base 0x%lx\n",
+ (long)c->tr_sel, (long)c->tr_limit, (long)c->tr_base);
+ printf("\ttype %d, s %d, dpl %d, p %d, avl %d, ops %d, g %d, nul %d\n",
+ c->tr_arbytes.fields.seg_type,
+ c->tr_arbytes.fields.s,
+ c->tr_arbytes.fields.dpl,
+ c->tr_arbytes.fields.p,
+ c->tr_arbytes.fields.avl,
+ c->tr_arbytes.fields.default_ops_size,
+ c->tr_arbytes.fields.g,
+ c->tr_arbytes.fields.null_bit);
+
+ printf("ldtr: sel 0x%lx, limit 0x%lx, base 0x%lx\n",
+ (long)c->ldtr_sel, (long)c->ldtr_limit, (long)c->ldtr_base);
+ printf("\ttype %d, s %d, dpl %d, p %d, avl %d, ops %d, g %d, nul %d\n",
+ c->ldtr_arbytes.fields.seg_type,
+ c->ldtr_arbytes.fields.s,
+ c->ldtr_arbytes.fields.dpl,
+ c->ldtr_arbytes.fields.p,
+ c->ldtr_arbytes.fields.avl,
+ c->ldtr_arbytes.fields.default_ops_size,
+ c->ldtr_arbytes.fields.g,
+ c->ldtr_arbytes.fields.null_bit);
+
+ printf("GDTR <0x%lx,0x%lx>:\n",
+ (long)c->gdtr_base, (long)c->gdtr_limit);
+ dump_dtr(c->gdtr_base, c->gdtr_limit);
+}
+#endif /* DEBUG */
+
+/*
+ * Lightweight printf that doesn't drag in everything under the sun.
+ */
+int
+printf(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ _doprint(putchar, fmt, ap);
+ va_end(ap);
+ return 0; /* for gcc compat */
+}
+
+int
+vprintf(const char *fmt, va_list ap)
+{
+ _doprint(putchar, fmt, ap);
+ return 0; /* for gcc compat */
+}
+
+void
+panic(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ _doprint(putchar, fmt, ap);
+ putchar('\n');
+ va_end(ap);
+ halt();
+}
+
+unsigned
+strlen(const char *s)
+{
+ const char *q = s;
+
+ while (*s++)
+ /* void */;
+ return s - q - 1;
+}
+
+static void
+putchar(int ch)
+{
+ outb(0xE9, ch);
+}
+
+/*
+ * A stripped down version of doprint,
+ * but still powerful enough for most tasks.
+ */
+static void
+_doprint(void (*put)(int), char const *fmt, va_list ap)
+{
+ register char *str, c;
+ int lflag, zflag, nflag;
+ char buffer[17];
+ unsigned value;
+ int i, slen, pad;
+
+ for ( ; *fmt != '\0'; fmt++) {
+ pad = zflag = nflag = lflag = 0;
+ if (*fmt == '%') {
+ c = *++fmt;
+ if (c == '-' || isdigit(c)) {
+ if (c == '-') {
+ nflag = 1;
+ c = *++fmt;
+ }
+ zflag = c == '0';
+ for (pad = 0; isdigit(c); c = *++fmt)
+ pad = (pad * 10) + c - '0';
+ }
+ if (c == 'l') { /* long extension */
+ lflag = 1;
+ c = *++fmt;
+ }
+ if (c == 'd' || c == 'u' || c == 'o' || c == 'x') {
+ if (lflag)
+ value = va_arg(ap, unsigned);
+ else
+ value = (unsigned) va_arg(ap, unsigned int);
+ str = buffer;
+ printnum(str, value,
+ c == 'o' ? 8 : (c == 'x' ? 16 : 10));
+ goto printn;
+ } else if (c == 'O' || c == 'D' || c == 'X') {
+ value = va_arg(ap, unsigned);
+ str = buffer;
+ printnum(str, value,
+ c == 'O' ? 8 : (c == 'X' ? 16 : 10));
+ printn:
+ slen = strlen(str);
+ for (i = pad - slen; i > 0; i--)
+ put(zflag ? '0' : ' ');
+ while (*str) put(*str++);
+ } else if (c == 's') {
+ str = va_arg(ap, char *);
+ slen = strlen(str);
+ if (nflag == 0)
+ for (i = pad - slen; i > 0; i--) put(' ');
+ while (*str) put(*str++);
+ if (nflag)
+ for (i = pad - slen; i > 0; i--) put(' ');
+ } else if (c == 'c')
+ put(va_arg(ap, int));
+ else
+ put(*fmt);
+ } else
+ put(*fmt);
+ }
+}
+
+static char *
+printnum(char *p, unsigned long num, int base)
+{
+ unsigned long n;
+
+ if ((n = num/base) > 0)
+ p = printnum(p, n, base);
+ *p++ = "0123456789ABCDEF"[(int)(num % base)];
+ *p = '\0';
+ return p;
+}
+
+void *
+memset(void *s, int c, unsigned n)
+{
+ int t0, t1;
+
+ __asm__ __volatile__ ("cld; rep; stosb"
+ : "=&c" (t0), "=&D" (t1)
+ : "a" (c), "1" (s), "0" (n)
+ : "memory");
+ return s;
+}
+
+void *
+memcpy(void *dest, const void *src, unsigned n)
+{
+ int t0, t1, t2;
+
+ __asm__ __volatile__(
+ "cld\n"
+ "rep; movsl\n"
+ "testb $2,%b4\n"
+ "je 1f\n"
+ "movsw\n"
+ "1: testb $1,%b4\n"
+ "je 2f\n"
+ "movsb\n"
+ "2:"
+ : "=&c" (t0), "=&D" (t1), "=&S" (t2)
+ : "0" (n/4), "q" (n), "1" ((long) dest), "2" ((long) src)
+ : "memory"
+ );
+ return dest;
+}
+
