Author: benno
Date: Sat Feb 17 00:12:30 2018
New Revision: 329418
URL: https://svnweb.freebsd.org/changeset/base/329418
Log:
Revert r329269.
I tried to rework a section to fit inside 80 columns but the change ended
up being functional. Back this out so I can readdress.
Modified:
head/stand/i386/boot2/boot2.c
Modified: head/stand/i386/boot2/boot2.c
==============================================================================
--- head/stand/i386/boot2/boot2.c Fri Feb 16 23:59:50 2018
(r329417)
+++ head/stand/i386/boot2/boot2.c Sat Feb 17 00:12:30 2018
(r329418)
@@ -72,33 +72,33 @@ extern uint32_t _end;
static const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */
static const unsigned char flags[NOPT] = {
- RBX_DUAL,
- RBX_SERIAL,
- RBX_ASKNAME,
- RBX_CDROM,
- RBX_CONFIG,
- RBX_KDB,
- RBX_GDB,
- RBX_MUTE,
- RBX_NOINTR,
- RBX_PAUSE,
- RBX_QUIET,
- RBX_DFLTROOT,
- RBX_SINGLE,
- RBX_VERBOSE
+ RBX_DUAL,
+ RBX_SERIAL,
+ RBX_ASKNAME,
+ RBX_CDROM,
+ RBX_CONFIG,
+ RBX_KDB,
+ RBX_GDB,
+ RBX_MUTE,
+ RBX_NOINTR,
+ RBX_PAUSE,
+ RBX_QUIET,
+ RBX_DFLTROOT,
+ RBX_SINGLE,
+ RBX_VERBOSE
};
static const char *const dev_nm[NDEV] = {"ad", "da", "fd"};
static const unsigned char dev_maj[NDEV] = {30, 4, 2};
static struct dsk {
- unsigned drive;
- unsigned type;
- unsigned unit;
- uint8_t slice;
- uint8_t part;
- unsigned start;
- int init;
+ unsigned drive;
+ unsigned type;
+ unsigned unit;
+ uint8_t slice;
+ uint8_t part;
+ unsigned start;
+ int init;
} dsk;
static char cmd[512], cmddup[512], knamebuf[1024];
static const char *kname;
@@ -126,21 +126,18 @@ static void memcpy(void *, const void *, int);
static void
memcpy(void *dst, const void *src, int len)
{
- const char *s;
- char *d;
+ const char *s = src;
+ char *d = dst;
- s = src;
- d = dst;
- while (len--)
- *d++ = *s++;
+ while (len--)
+ *d++ = *s++;
}
static inline int
strcmp(const char *s1, const char *s2)
{
-
- for (; *s1 == *s2 && *s1; s1++, s2++);
- return ((unsigned char)*s1 - (unsigned char)*s2);
+ for (; *s1 == *s2 && *s1; s1++, s2++);
+ return (unsigned char)*s1 - (unsigned char)*s2;
}
#define UFS_SMALL_CGBASE
@@ -149,519 +146,501 @@ strcmp(const char *s1, const char *s2)
static int
xfsread(ufs_ino_t inode, void *buf, size_t nbyte)
{
-
- if ((size_t)fsread(inode, buf, nbyte) != nbyte) {
- printf("Invalid %s\n", "format");
- return (-1);
- }
- return (0);
+ if ((size_t)fsread(inode, buf, nbyte) != nbyte) {
+ printf("Invalid %s\n", "format");
+ return -1;
+ }
+ return 0;
}
static inline void
getstr(void)
{
- char *s;
- int c;
+ char *s;
+ int c;
- s = cmd;
- for (;;) {
- switch (c = xgetc(0)) {
- case 0:
- break;
- case '\177':
- case '\b':
- if (s > cmd) {
- s--;
- printf("\b \b");
- }
- break;
- case '\n':
- case '\r':
- *s = 0;
- return;
- default:
- if (s - cmd < sizeof(cmd) - 1)
- *s++ = c;
- putchar(c);
- }
+ s = cmd;
+ for (;;) {
+ switch (c = xgetc(0)) {
+ case 0:
+ break;
+ case '\177':
+ case '\b':
+ if (s > cmd) {
+ s--;
+ printf("\b \b");
+ }
+ break;
+ case '\n':
+ case '\r':
+ *s = 0;
+ return;
+ default:
+ if (s - cmd < sizeof(cmd) - 1)
+ *s++ = c;
+ putchar(c);
}
+ }
}
static inline void
putc(int c)
{
-
- v86.addr = 0x10;
- v86.eax = 0xe00 | (c & 0xff);
- v86.ebx = 0x7;
- v86int();
+ v86.addr = 0x10;
+ v86.eax = 0xe00 | (c & 0xff);
+ v86.ebx = 0x7;
+ v86int();
}
int
main(void)
{
- uint8_t autoboot;
- ufs_ino_t ino;
- size_t nbyte;
+ uint8_t autoboot;
+ ufs_ino_t ino;
+ size_t nbyte;
- dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base);
- v86.ctl = V86_FLAGS;
- v86.efl = PSL_RESERVED_DEFAULT | PSL_I;
- dsk.drive = *(uint8_t *)PTOV(ARGS);
- dsk.type = dsk.drive & DRV_HARD ? TYPE_AD : TYPE_FD;
- dsk.unit = dsk.drive & DRV_MASK;
- dsk.slice = *(uint8_t *)PTOV(ARGS + 1) + 1;
- bootinfo.bi_version = BOOTINFO_VERSION;
- bootinfo.bi_size = sizeof(bootinfo);
+ dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base);
+ v86.ctl = V86_FLAGS;
+ v86.efl = PSL_RESERVED_DEFAULT | PSL_I;
+ dsk.drive = *(uint8_t *)PTOV(ARGS);
+ dsk.type = dsk.drive & DRV_HARD ? TYPE_AD : TYPE_FD;
+ dsk.unit = dsk.drive & DRV_MASK;
+ dsk.slice = *(uint8_t *)PTOV(ARGS + 1) + 1;
+ bootinfo.bi_version = BOOTINFO_VERSION;
+ bootinfo.bi_size = sizeof(bootinfo);
- /* Process configuration file */
+ /* Process configuration file */
- autoboot = 1;
+ autoboot = 1;
- if ((ino = lookup(PATH_CONFIG)) ||
- (ino = lookup(PATH_DOTCONFIG))) {
- nbyte = fsread(ino, cmd, sizeof(cmd) - 1);
- cmd[nbyte] = '\0';
- }
+ if ((ino = lookup(PATH_CONFIG)) ||
+ (ino = lookup(PATH_DOTCONFIG))) {
+ nbyte = fsread(ino, cmd, sizeof(cmd) - 1);
+ cmd[nbyte] = '\0';
+ }
- if (*cmd) {
- memcpy(cmddup, cmd, sizeof(cmd));
- if (parse())
- autoboot = 0;
- if (!OPT_CHECK(RBX_QUIET))
- printf("%s: %s", PATH_CONFIG, cmddup);
- /* Do not process this command twice */
- *cmd = 0;
- }
+ if (*cmd) {
+ memcpy(cmddup, cmd, sizeof(cmd));
+ if (parse())
+ autoboot = 0;
+ if (!OPT_CHECK(RBX_QUIET))
+ printf("%s: %s", PATH_CONFIG, cmddup);
+ /* Do not process this command twice */
+ *cmd = 0;
+ }
- /*
- * Try to exec stage 3 boot loader. If interrupted by a keypress,
- * or in case of failure, try to load a kernel directly instead.
- */
+ /*
+ * Try to exec stage 3 boot loader. If interrupted by a keypress,
+ * or in case of failure, try to load a kernel directly instead.
+ */
- if (!kname) {
- kname = PATH_LOADER;
- if (autoboot && !keyhit(3*SECOND)) {
- load();
- kname = PATH_KERNEL;
- }
+ if (!kname) {
+ kname = PATH_LOADER;
+ if (autoboot && !keyhit(3*SECOND)) {
+ load();
+ kname = PATH_KERNEL;
}
+ }
- /* Present the user with the boot2 prompt. */
+ /* Present the user with the boot2 prompt. */
- for (;;) {
- if (!autoboot || !OPT_CHECK(RBX_QUIET))
- printf("\nFreeBSD/x86 boot\n"
- "Default: %u:%s(%u,%c)%s\n"
- "boot: ",
- dsk.drive & DRV_MASK, dev_nm[dsk.type], dsk.unit,
- 'a' + dsk.part, kname);
- if (DO_SIO)
- sio_flush();
- if (!autoboot || keyhit(3*SECOND))
- getstr();
- else if (!autoboot || !OPT_CHECK(RBX_QUIET))
- putchar('\n');
- autoboot = 0;
- if (parse())
- putchar('\a');
- else
- load();
- }
+ for (;;) {
+ if (!autoboot || !OPT_CHECK(RBX_QUIET))
+ printf("\nFreeBSD/x86 boot\n"
+ "Default: %u:%s(%u,%c)%s\n"
+ "boot: ",
+ dsk.drive & DRV_MASK, dev_nm[dsk.type], dsk.unit,
+ 'a' + dsk.part, kname);
+ if (DO_SIO)
+ sio_flush();
+ if (!autoboot || keyhit(3*SECOND))
+ getstr();
+ else if (!autoboot || !OPT_CHECK(RBX_QUIET))
+ putchar('\n');
+ autoboot = 0;
+ if (parse())
+ putchar('\a');
+ else
+ load();
+ }
}
/* XXX - Needed for btxld to link the boot2 binary; do not remove. */
void
exit(int x)
{
-
}
static void
load(void)
{
- union {
- struct exec ex;
- Elf32_Ehdr eh;
- } hdr;
- static Elf32_Phdr ep[2];
- static Elf32_Shdr es[2];
- caddr_t p;
- ufs_ino_t ino;
- uint32_t addr;
- int k;
- uint8_t i, j;
+ union {
+ struct exec ex;
+ Elf32_Ehdr eh;
+ } hdr;
+ static Elf32_Phdr ep[2];
+ static Elf32_Shdr es[2];
+ caddr_t p;
+ ufs_ino_t ino;
+ uint32_t addr;
+ int k;
+ uint8_t i, j;
- if (!(ino = lookup(kname))) {
- if (!ls)
- printf("No %s\n", kname);
+ if (!(ino = lookup(kname))) {
+ if (!ls)
+ printf("No %s\n", kname);
+ return;
+ }
+ if (xfsread(ino, &hdr, sizeof(hdr)))
+ return;
+
+ if (N_GETMAGIC(hdr.ex) == ZMAGIC) {
+ addr = hdr.ex.a_entry & 0xffffff;
+ p = PTOV(addr);
+ fs_off = PAGE_SIZE;
+ if (xfsread(ino, p, hdr.ex.a_text))
+ return;
+ p += roundup2(hdr.ex.a_text, PAGE_SIZE);
+ if (xfsread(ino, p, hdr.ex.a_data))
+ return;
+ } else if (IS_ELF(hdr.eh)) {
+ fs_off = hdr.eh.e_phoff;
+ for (j = k = 0; k < hdr.eh.e_phnum && j < 2; k++) {
+ if (xfsread(ino, ep + j, sizeof(ep[0])))
return;
+ if (ep[j].p_type == PT_LOAD)
+ j++;
}
- if (xfsread(ino, &hdr, sizeof(hdr)))
+ for (i = 0; i < 2; i++) {
+ p = PTOV(ep[i].p_paddr & 0xffffff);
+ fs_off = ep[i].p_offset;
+ if (xfsread(ino, p, ep[i].p_filesz))
return;
-
- if (N_GETMAGIC(hdr.ex) == ZMAGIC) {
- addr = hdr.ex.a_entry & 0xffffff;
- p = PTOV(addr);
- fs_off = PAGE_SIZE;
- if (xfsread(ino, p, hdr.ex.a_text))
- return;
- p += roundup2(hdr.ex.a_text, PAGE_SIZE);
- if (xfsread(ino, p, hdr.ex.a_data))
- return;
- } else if (IS_ELF(hdr.eh)) {
- fs_off = hdr.eh.e_phoff;
- for (j = k = 0; k < hdr.eh.e_phnum && j < 2; k++) {
- if (xfsread(ino, ep + j, sizeof(ep[0])))
- return;
- if (ep[j].p_type == PT_LOAD)
- j++;
- }
- for (i = 0; i < 2; i++) {
- p = PTOV(ep[i].p_paddr & 0xffffff);
- fs_off = ep[i].p_offset;
- if (xfsread(ino, p, ep[i].p_filesz))
- return;
- }
- p += roundup2(ep[1].p_memsz, PAGE_SIZE);
- bootinfo.bi_symtab = VTOP(p);
- if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) {
- fs_off = hdr.eh.e_shoff + sizeof(es[0]) *
- (hdr.eh.e_shstrndx + 1);
- if (xfsread(ino, &es, sizeof(es)))
- return;
- for (i = 0; i < 2; i++) {
- *(Elf32_Word *)p = es[i].sh_size;
- p += sizeof(es[i].sh_size);
- fs_off = es[i].sh_offset;
- if (xfsread(ino, p, es[i].sh_size))
- return;
- p += es[i].sh_size;
- }
- }
- addr = hdr.eh.e_entry & 0xffffff;
- bootinfo.bi_esymtab = VTOP(p);
- } else {
- printf("Invalid %s\n", "format");
+ }
+ p += roundup2(ep[1].p_memsz, PAGE_SIZE);
+ bootinfo.bi_symtab = VTOP(p);
+ if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) {
+ fs_off = hdr.eh.e_shoff + sizeof(es[0]) *
+ (hdr.eh.e_shstrndx + 1);
+ if (xfsread(ino, &es, sizeof(es)))
return;
+ for (i = 0; i < 2; i++) {
+ *(Elf32_Word *)p = es[i].sh_size;
+ p += sizeof(es[i].sh_size);
+ fs_off = es[i].sh_offset;
+ if (xfsread(ino, p, es[i].sh_size))
+ return;
+ p += es[i].sh_size;
+ }
}
+ addr = hdr.eh.e_entry & 0xffffff;
+ bootinfo.bi_esymtab = VTOP(p);
+ } else {
+ printf("Invalid %s\n", "format");
+ return;
+ }
- bootinfo.bi_kernelname = VTOP(kname);
- bootinfo.bi_bios_dev = dsk.drive;
- __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK),
- MAKEBOOTDEV(dev_maj[dsk.type], dsk.slice, dsk.unit, dsk.part),
- 0, 0, 0, VTOP(&bootinfo));
+ bootinfo.bi_kernelname = VTOP(kname);
+ bootinfo.bi_bios_dev = dsk.drive;
+ __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK),
+ MAKEBOOTDEV(dev_maj[dsk.type], dsk.slice, dsk.unit, dsk.part),
+ 0, 0, 0, VTOP(&bootinfo));
}
static int
parse()
{
- char *arg;
- char *ep, *p, *q;
- const char *cp;
- unsigned int drv;
- int c, i, j;
- size_t k;
+ char *arg = cmd;
+ char *ep, *p, *q;
+ const char *cp;
+ unsigned int drv;
+ int c, i, j;
+ size_t k;
- arg = cmd;
-
- while ((c = *arg++)) {
- if (c == ' ' || c == '\t' || c == '\n')
- continue;
- for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
- ep = p;
- if (*p)
- *p++ = 0;
- if (c == '-') {
- while ((c = *arg++)) {
- if (c == 'P') {
- if (*(uint8_t *)PTOV(0x496) & 0x10) {
- cp = "yes";
- } else {
- opts |= OPT_SET(RBX_DUAL) |
- OPT_SET(RBX_SERIAL);
- cp = "no";
- }
- printf("Keyboard: %s\n", cp);
- continue;
+ while ((c = *arg++)) {
+ if (c == ' ' || c == '\t' || c == '\n')
+ continue;
+ for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
+ ep = p;
+ if (*p)
+ *p++ = 0;
+ if (c == '-') {
+ while ((c = *arg++)) {
+ if (c == 'P') {
+ if (*(uint8_t *)PTOV(0x496) & 0x10) {
+ cp = "yes";
+ } else {
+ opts |= OPT_SET(RBX_DUAL) | OPT_SET(RBX_SERIAL);
+ cp = "no";
+ }
+ printf("Keyboard: %s\n", cp);
+ continue;
#if SERIAL
- } else if (c == 'S') {
- j = 0;
- while (*arg <= '9') {
- i = (unsigned int)(*arg - '0');
- j = j * 10 + i;
- arg++;
- }
- if (j > 0 && i == -'0') {
- comspeed = j;
- break;
- }
- /*
- * Fall through to error below
- * ('S' not in optstr[]).
- */
+ } else if (c == 'S') {
+ j = 0;
+ while ((unsigned int)(i = *arg++ - '0') <= 9)
+ j = j * 10 + i;
+ if (j > 0 && i == -'0') {
+ comspeed = j;
+ break;
+ }
+ /* Fall through to error below ('S' not in optstr[]). */
#endif
- }
- for (i = 0; c != optstr[i]; i++)
- if (i == NOPT - 1)
- return (-1);
- opts ^= OPT_SET(flags[i]);
- }
+ }
+ for (i = 0; c != optstr[i]; i++)
+ if (i == NOPT - 1)
+ return -1;
+ opts ^= OPT_SET(flags[i]);
+ }
#if SERIAL
- ioctrl = OPT_CHECK(RBX_DUAL) ?
- (IO_SERIAL|IO_KEYBOARD) :
- OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD;
- if (DO_SIO) {
- if (sio_init(115200 / comspeed) != 0)
- ioctrl &= ~IO_SERIAL;
- }
+ ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) :
+ OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD;
+ if (DO_SIO) {
+ if (sio_init(115200 / comspeed) != 0)
+ ioctrl &= ~IO_SERIAL;
+ }
#endif
- } else {
- for (q = arg--; *q && *q != '('; q++);
- if (*q) {
- drv = -1;
- if (arg[1] == ':') {
- drv = *arg - '0';
- if (drv > 9)
- return (-1);
- arg += 2;
- }
- if (q - arg != 2)
- return -1;
- for (i = 0; arg[0] != dev_nm[i][0] ||
- arg[1] != dev_nm[i][1]; i++)
- if (i == NDEV - 1)
- return (-1);
- dsk.type = i;
- arg += 3;
- dsk.unit = *arg - '0';
- if (arg[1] != ',' || dsk.unit > 9)
- return (-1);
- arg += 2;
- dsk.slice = WHOLE_DISK_SLICE;
- if (arg[1] == ',') {
- dsk.slice = *arg - '0' + 1;
- if (dsk.slice > NDOSPART + 1)
- return (-1);
- arg += 2;
- }
- if (arg[1] != ')')
- return (-1);
- dsk.part = *arg - 'a';
- if (dsk.part > 7)
- return (-1);
- arg += 2;
- if (drv == -1)
- drv = dsk.unit;
- dsk.drive = (dsk.type <= TYPE_MAXHARD
- ? DRV_HARD : 0) + drv;
- dsk_meta = 0;
- }
- k = ep - arg;
- if (k > 0) {
- if (k >= sizeof(knamebuf))
- return (-1);
- memcpy(knamebuf, arg, k + 1);
- kname = knamebuf;
- }
+ } else {
+ for (q = arg--; *q && *q != '('; q++);
+ if (*q) {
+ drv = -1;
+ if (arg[1] == ':') {
+ drv = *arg - '0';
+ if (drv > 9)
+ return (-1);
+ arg += 2;
}
- arg = p;
+ if (q - arg != 2)
+ return -1;
+ for (i = 0; arg[0] != dev_nm[i][0] ||
+ arg[1] != dev_nm[i][1]; i++)
+ if (i == NDEV - 1)
+ return -1;
+ dsk.type = i;
+ arg += 3;
+ dsk.unit = *arg - '0';
+ if (arg[1] != ',' || dsk.unit > 9)
+ return -1;
+ arg += 2;
+ dsk.slice = WHOLE_DISK_SLICE;
+ if (arg[1] == ',') {
+ dsk.slice = *arg - '0' + 1;
+ if (dsk.slice > NDOSPART + 1)
+ return -1;
+ arg += 2;
+ }
+ if (arg[1] != ')')
+ return -1;
+ dsk.part = *arg - 'a';
+ if (dsk.part > 7)
+ return (-1);
+ arg += 2;
+ if (drv == -1)
+ drv = dsk.unit;
+ dsk.drive = (dsk.type <= TYPE_MAXHARD
+ ? DRV_HARD : 0) + drv;
+ dsk_meta = 0;
+ }
+ k = ep - arg;
+ if (k > 0) {
+ if (k >= sizeof(knamebuf))
+ return -1;
+ memcpy(knamebuf, arg, k + 1);
+ kname = knamebuf;
+ }
}
- return (0);
+ arg = p;
+ }
+ return 0;
}
static int
dskread(void *buf, unsigned lba, unsigned nblk)
{
- struct dos_partition *dp;
- struct disklabel *d;
- char *sec;
- unsigned i;
- uint8_t sl;
- const char *reason;
+ struct dos_partition *dp;
+ struct disklabel *d;
+ char *sec;
+ unsigned i;
+ uint8_t sl;
+ const char *reason;
- if (!dsk_meta) {
- sec = dmadat->secbuf;
- dsk.start = 0;
- if (drvread(sec, DOSBBSECTOR, 1))
- return (-1);
- dp = (void *)(sec + DOSPARTOFF);
- sl = dsk.slice;
- if (sl < BASE_SLICE) {
- for (i = 0; i < NDOSPART; i++)
- if (dp[i].dp_typ == DOSPTYP_386BSD &&
- (dp[i].dp_flag & 0x80 || sl < BASE_SLICE)) {
- sl = BASE_SLICE + i;
- if (dp[i].dp_flag & 0x80 ||
- dsk.slice == COMPATIBILITY_SLICE)
- break;
- }
- if (dsk.slice == WHOLE_DISK_SLICE)
- dsk.slice = sl;
+ if (!dsk_meta) {
+ sec = dmadat->secbuf;
+ dsk.start = 0;
+ if (drvread(sec, DOSBBSECTOR, 1))
+ return -1;
+ dp = (void *)(sec + DOSPARTOFF);
+ sl = dsk.slice;
+ if (sl < BASE_SLICE) {
+ for (i = 0; i < NDOSPART; i++)
+ if (dp[i].dp_typ == DOSPTYP_386BSD &&
+ (dp[i].dp_flag & 0x80 || sl < BASE_SLICE)) {
+ sl = BASE_SLICE + i;
+ if (dp[i].dp_flag & 0x80 ||
+ dsk.slice == COMPATIBILITY_SLICE)
+ break;
}
- if (sl != WHOLE_DISK_SLICE) {
- if (sl != COMPATIBILITY_SLICE)
- dp += sl - BASE_SLICE;
- if (dp->dp_typ != DOSPTYP_386BSD) {
- reason = "slice";
- goto error;
- }
- dsk.start = dp->dp_start;
- }
- if (drvread(sec, dsk.start + LABELSECTOR, 1))
- return (-1);
- d = (void *)(sec + LABELOFFSET);
- if (d->d_magic != DISKMAGIC || d->d_magic2 != DISKMAGIC) {
- if (dsk.part != RAW_PART) {
- reason = "label";
- goto error;
- }
- } else {
- if (!dsk.init) {
- if (d->d_type == DTYPE_SCSI)
- dsk.type = TYPE_DA;
- dsk.init++;
- }
- if (dsk.part >= d->d_npartitions ||
- !d->d_partitions[dsk.part].p_size) {
- reason = "partition";
- goto error;
- }
- dsk.start += d->d_partitions[dsk.part].p_offset;
- dsk.start -= d->d_partitions[RAW_PART].p_offset;
- }
+ if (dsk.slice == WHOLE_DISK_SLICE)
+ dsk.slice = sl;
}
- return (drvread(buf, dsk.start + lba, nblk));
+ if (sl != WHOLE_DISK_SLICE) {
+ if (sl != COMPATIBILITY_SLICE)
+ dp += sl - BASE_SLICE;
+ if (dp->dp_typ != DOSPTYP_386BSD) {
+ reason = "slice";
+ goto error;
+ }
+ dsk.start = dp->dp_start;
+ }
+ if (drvread(sec, dsk.start + LABELSECTOR, 1))
+ return -1;
+ d = (void *)(sec + LABELOFFSET);
+ if (d->d_magic != DISKMAGIC || d->d_magic2 != DISKMAGIC) {
+ if (dsk.part != RAW_PART) {
+ reason = "label";
+ goto error;
+ }
+ } else {
+ if (!dsk.init) {
+ if (d->d_type == DTYPE_SCSI)
+ dsk.type = TYPE_DA;
+ dsk.init++;
+ }
+ if (dsk.part >= d->d_npartitions ||
+ !d->d_partitions[dsk.part].p_size) {
+ reason = "partition";
+ goto error;
+ }
+ dsk.start += d->d_partitions[dsk.part].p_offset;
+ dsk.start -= d->d_partitions[RAW_PART].p_offset;
+ }
+ }
+ return drvread(buf, dsk.start + lba, nblk);
error:
- printf("Invalid %s\n", reason);
- return (-1);
+ printf("Invalid %s\n", reason);
+ return -1;
}
static void
printf(const char *fmt,...)
{
- va_list ap;
- static char buf[10];
- char *s;
- unsigned u;
- int c;
+ va_list ap;
+ static char buf[10];
+ char *s;
+ unsigned u;
+ int c;
- va_start(ap, fmt);
- while ((c = *fmt++)) {
- if (c == '%') {
- c = *fmt++;
- switch (c) {
- case 'c':
- putchar(va_arg(ap, int));
- continue;
- case 's':
- for (s = va_arg(ap, char *); *s; s++)
- putchar(*s);
- continue;
- case 'u':
- u = va_arg(ap, unsigned);
- s = buf;
- do
- *s++ = '0' + u % 10U;
- while (u /= 10U);
- while (--s >= buf)
- putchar(*s);
- continue;
- }
- }
- putchar(c);
+ va_start(ap, fmt);
+ while ((c = *fmt++)) {
+ if (c == '%') {
+ c = *fmt++;
+ switch (c) {
+ case 'c':
+ putchar(va_arg(ap, int));
+ continue;
+ case 's':
+ for (s = va_arg(ap, char *); *s; s++)
+ putchar(*s);
+ continue;
+ case 'u':
+ u = va_arg(ap, unsigned);
+ s = buf;
+ do
+ *s++ = '0' + u % 10U;
+ while (u /= 10U);
+ while (--s >= buf)
+ putchar(*s);
+ continue;
+ }
}
- va_end(ap);
- return;
+ putchar(c);
+ }
+ va_end(ap);
+ return;
}
static void
putchar(int c)
{
-
- if (c == '\n')
- xputc('\r');
- xputc(c);
+ if (c == '\n')
+ xputc('\r');
+ xputc(c);
}
static int
drvread(void *buf, unsigned lba, unsigned nblk)
{
- static unsigned c = 0x2d5c7c2f;
+ static unsigned c = 0x2d5c7c2f;
- if (!OPT_CHECK(RBX_QUIET)) {
- xputc(c = c << 8 | c >> 24);
- xputc('\b');
- }
- v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
- v86.addr = XREADORG; /* call to xread in boot1 */
- v86.es = VTOPSEG(buf);
- v86.eax = lba;
- v86.ebx = VTOPOFF(buf);
- v86.ecx = lba >> 16;
- v86.edx = nblk << 8 | dsk.drive;
- v86int();
- v86.ctl = V86_FLAGS;
- if (V86_CY(v86.efl)) {
- printf("error %u lba %u\n", v86.eax >> 8 & 0xff, lba);
- return (-1);
- }
- return (0);
+ if (!OPT_CHECK(RBX_QUIET)) {
+ xputc(c = c << 8 | c >> 24);
+ xputc('\b');
+ }
+ v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
+ v86.addr = XREADORG; /* call to xread in boot1 */
+ v86.es = VTOPSEG(buf);
+ v86.eax = lba;
+ v86.ebx = VTOPOFF(buf);
+ v86.ecx = lba >> 16;
+ v86.edx = nblk << 8 | dsk.drive;
+ v86int();
+ v86.ctl = V86_FLAGS;
+ if (V86_CY(v86.efl)) {
+ printf("error %u lba %u\n", v86.eax >> 8 & 0xff, lba);
+ return -1;
+ }
+ return 0;
}
static int
keyhit(unsigned ticks)
{
- uint32_t t0, t1;
+ uint32_t t0, t1;
- if (OPT_CHECK(RBX_NOINTR))
- return (0);
- t0 = 0;
- for (;;) {
- if (xgetc(1))
- return (1);
- t1 = *(uint32_t *)PTOV(0x46c);
- if (!t0)
- t0 = t1;
- if ((uint32_t)(t1 - t0) >= ticks)
- return (0);
- }
+ if (OPT_CHECK(RBX_NOINTR))
+ return 0;
+ t0 = 0;
+ for (;;) {
+ if (xgetc(1))
+ return 1;
+ t1 = *(uint32_t *)PTOV(0x46c);
+ if (!t0)
+ t0 = t1;
+ if ((uint32_t)(t1 - t0) >= ticks)
+ return 0;
+ }
}
static int
xputc(int c)
{
-
- if (DO_KBD)
- putc(c);
- if (DO_SIO)
- sio_putc(c);
- return (c);
+ if (DO_KBD)
+ putc(c);
+ if (DO_SIO)
+ sio_putc(c);
+ return c;
}
static int
getc(int fn)
{
-
- v86.addr = 0x16;
- v86.eax = fn << 8;
- v86int();
- return (fn == 0 ? v86.eax & 0xff : !V86_ZR(v86.efl));
+ v86.addr = 0x16;
+ v86.eax = fn << 8;
+ v86int();
+ return fn == 0 ? v86.eax & 0xff : !V86_ZR(v86.efl);
}
static int
xgetc(int fn)
{
-
- if (OPT_CHECK(RBX_NOINTR))
- return (0);
-
- for (;;) {
- if (DO_KBD && getc(1))
- return (fn ? 1 : getc(0));
- if (DO_SIO && sio_ischar())
- return (fn ? 1 : sio_getc());
- if (fn)
- return (0);
- }
+ if (OPT_CHECK(RBX_NOINTR))
+ return 0;
+ for (;;) {
+ if (DO_KBD && getc(1))
+ return fn ? 1 : getc(0);
+ if (DO_SIO && sio_ischar())
+ return fn ? 1 : sio_getc();
+ if (fn)
+ return 0;
+ }
}
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