/* Returns the status code from PXE (0 on success),
or -1 on invocation failure */
int pxe_get_nic_type(t_PXENV_UNDI_GET_NIC_TYPE *gnt)
{
com32sys_t regs;
t_PXENV_UNDI_GET_NIC_TYPE *lgnt;
lgnt = lzalloc(sizeof *lgnt);
if (!lgnt)
return -1;
memset(®s, 0, sizeof regs);
regs.eax.w[0] = 0x0009;
regs.ebx.w[0] = PXENV_UNDI_GET_NIC_TYPE;
regs.es = SEG(lgnt);
/* regs.edi.w[0] = OFFS(lgnt); */
__intcall(0x22, ®s, ®s);
memcpy(gnt, lgnt, sizeof(t_PXENV_UNDI_GET_NIC_TYPE));
lfree(lgnt);
if (regs.eflags.l & EFLAGS_CF)
return -1;
return gnt->Status;
}
static void sanboot(const char **args)
{
char *q;
struct s_PXENV_FILE_EXEC *fx;
com32sys_t reg;
memset(®, 0, sizeof reg);
fx = __com32.cs_bounce;
q = (char *)(fx+1);
fx->Status = 1;
fx->Command.offs = OFFS(q);
fx->Command.seg = SEG(q);
q = stpcpy(q, "sanboot");
while (*args) {
*q++ = ' ';
q = stpcpy(q, *args);
args++;
}
memset(®, 0, sizeof reg);
reg.eax.w[0] = 0x0009;
reg.ebx.w[0] = 0x00e5; /* PXENV_FILE_EXEC */
reg.edi.w[0] = OFFS(fx);
reg.es = SEG(fx);
__intcall(0x22, ®, ®);
/* This should not return... */
}
static bool plop_INT13h_check(void)
{
com32sys_t inregs, outregs;
/* Prepare the register set */
memset(&inregs, 0, sizeof inregs);
/*
* Check if PLoP already has booted a CDROM or USB drive by checking
* for the presence of the PLoP INT13h hook.
*
* The following assembly code (NASM) can detect the PLoP INT13h hook:
*
* mov eax,'PoLP' ; Reverse of 'PLoP'
* mov ebp,'DKHC' ; Reverse of 'CHKD'
* int 13h
* cmp eax,' sey' ; Reverse of 'yes '
* jz plop_INT13h_active
*/
inregs.eax.l = 0x504c6f50; /* "PLoP" */
inregs.ebp.l = 0x43484b44; /* "CHKD" */
__intcall(0x13, &inregs, &outregs);
/* eax will contain "yes " if PLoP INT13h hook is available */
if (outregs.eax.l == 0x79657320)
return true;
return false;
}
void __ansicon_beep(void)
{
static com32sys_t ireg;
ireg.eax.w[0] = 0x0e07;
ireg.ebx.b[1] = BIOS_PAGE;
__intcall(0x10, &ireg, NULL);
}
int syslinux_adv_write(void)
{
static com32sys_t reg;
reg.eax.w[0] = 0x001d;
__intcall(0x22, ®, ®);
return (reg.eflags.l & EFLAGS_CF) ? -1 : 0;
}
void runsyslinuxcmd(const char *cmd)
{
strcpy(__com32.cs_bounce, cmd);
REG_AX(inreg) = 0x0003; // Run command
REG_BX(inreg) = OFFS(__com32.cs_bounce);
REG_ES(inreg) = SEG(__com32.cs_bounce);
__intcall(0x22, &inreg, &outreg);
}
/* Show or hide the cursor */
static void ansicon_showcursor(const struct term_state *st)
{
static com32sys_t ireg;
ireg.eax.b[1] = 0x01;
ireg.ecx.w[0] = st->cursor ? cursor_type : 0x2020;
__intcall(0x10, &ireg, NULL);
}
unsigned int getversion(char *deriv,unsigned int *numfun)
{
REG_AX(inreg) = 0x0001;
__intcall(0x22,&inreg,&outreg);
if (deriv) *deriv= REG_DL(outreg);
if (numfun) *numfun = REG_AX(outreg);
return REG_CX(outreg);
}
void syslinux_final_cleanup(uint16_t flags)
{
static com32sys_t ireg;
ireg.eax.w[0] = 0x000c;
ireg.edx.w[0] = flags;
__intcall(0x22, &ireg, NULL);
}
static void emit(char ch)
{
static com32sys_t ireg; /* Zeroed with the BSS */
ireg.eax.b[1] = 0x04;
ireg.edx.b[0] = ch;
__intcall(0x21, &ireg, NULL);
}
static void __constructor __syslinux_get_shuffer_size(void)
{
static com32sys_t reg;
reg.eax.w[0] = 0x0023;
__intcall(0x22, ®, ®);
shuffler_size = (reg.eflags.l & EFLAGS_CF) ? 2048 : reg.ecx.w[0];
}
char issyslinux(void)
{
REG_EAX(inreg) = 0x00003000;
REG_EBX(inreg) = REG_ECX(inreg) = REG_EDX(inreg) = 0xFFFFFFFF;
__intcall(0x21, &inreg, &outreg);
return (REG_EAX(outreg) == 0x59530000) &&
(REG_EBX(outreg) == 0x4c530000) &&
(REG_ECX(outreg) == 0x4e490000) && (REG_EDX(outreg) == 0x58550000);
}
void OS::cleanup(void)
{
static com32sys_t rm;
rm.eax.w[0] = 0x000C;
rm.edx.w[0] = 0x0000;
printf("Unloading bootloader stack");
__intcall(0x22, &rm, NULL);
printf("\n");
}
static int pxeapi_call(int func, const uint8_t *buf)
{
static com32sys_t inargs, outargs;
inargs.eax.w[0] = 0x0009; /* Call PXE Stack */
inargs.ebx.w[0] = func; /* PXE function number */
inargs.edi.w[0] = OFFS(buf);
inargs.es = SEG(buf);
__intcall(0x22, &inargs, &outargs);
return outargs.eax.w[0] == PXENV_EXIT_SUCCESS;
}
void __pci_write_bios(uint32_t call, uint32_t v, pciaddr_t a)
{
com32sys_t rs;
memset(&rs, 0, sizeof rs);
rs.eax.w[0] = call;
rs.ebx.w[0] = a >> 8; /* bus:device:function */
rs.edi.b[0] = a; /* address:reg */
rs.ecx.l = v;
__intcall(0x1a, &rs, NULL);
}
static void dump_e820(void)
{
com32sys_t ireg, oreg;
struct e820_data ed;
uint32_t type;
void *low_ed;
low_ed = lmalloc(sizeof ed);
if (!low_ed)
return;
memset(&ireg, 0, sizeof ireg);
ireg.eax.w[0] = 0xe820;
ireg.edx.l = 0x534d4150;
ireg.ecx.l = sizeof(struct e820_data);
ireg.edi.w[0] = OFFS(low_ed);
ireg.es = SEG(low_ed);
memset(&ed, 0, sizeof ed);
ed.extattr = 1;
do {
memcpy(low_ed, &ed, sizeof ed);
__intcall(0x15, &ireg, &oreg);
if (oreg.eflags.l & EFLAGS_CF ||
oreg.eax.l != 0x534d4150 || oreg.ecx.l < 20)
break;
memcpy(&ed, low_ed, sizeof ed);
if (oreg.ecx.l >= 24) {
/* ebx base length end type */
printf("%8x %016llx %016llx %016llx %d [%x]",
ireg.ebx.l, ed.base, ed.len, ed.base + ed.len, ed.type,
ed.extattr);
} else {
/* ebx base length end */
printf("%8x %016llx %016llx %016llx %d [-]",
ireg.ebx.l, ed.base, ed.len, ed.base + ed.len, ed.type);
ed.extattr = 1;
}
type = ed.type - 1;
if (type < sizeof(e820_types) / sizeof(e820_types[0]))
printf(" %s", e820_types[type]);
putchar('\n');
ireg.ebx.l = oreg.ebx.l;
} while (ireg.ebx.l);
lfree(low_ed);
}
static int get_disk_params(int disk)
{
static com32sys_t getparm, parm, getebios, ebios;
disk_info.disk = disk;
disk_info.ebios = disk_info.cbios = 0;
/* Get EBIOS support */
getebios.eax.w[0] = 0x4100;
getebios.ebx.w[0] = 0x55aa;
getebios.edx.b[0] = disk;
getebios.eflags.b[0] = 0x3; /* CF set */
__intcall(0x13, &getebios, &ebios);
if ( !(ebios.eflags.l & EFLAGS_CF) &&
ebios.ebx.w[0] == 0xaa55 &&
(ebios.ecx.b[0] & 1) ) {
disk_info.ebios = 1;
}
/* Get disk parameters -- really only useful for
hard disks, but if we have a partitioned floppy
it's actually our best chance... */
getparm.eax.b[1] = 0x08;
getparm.edx.b[0] = disk;
__intcall(0x13, &getparm, &parm);
if ( parm.eflags.l & EFLAGS_CF )
return disk_info.ebios ? 0 : -1;
disk_info.head = parm.edx.b[1]+1;
disk_info.sect = parm.ecx.b[0] & 0x3f;
if ( disk_info.sect == 0 ) {
disk_info.sect = 1;
} else {
disk_info.cbios = 1; /* Valid geometry */
}
return 0;
}
static void ansicon_scroll_up(const struct term_state *st)
{
static com32sys_t ireg;
ireg.eax.w[0] = 0x0601;
ireg.ebx.b[1] = ansicon_attribute(st);
ireg.ecx.w[0] = 0;
ireg.edx.b[1] = ti.rows-1;
ireg.edx.b[0] = ti.cols-1;
__intcall(0x10, &ireg, NULL); /* Scroll */
}
void __constructor __syslinux_get_derivative_info(void)
{
com32sys_t *const r = &__syslinux_derivative_info.rr.r;
r->eax.w[0] = 0x000A;
__intcall(0x22, r, r);
__syslinux_derivative_info.r.esbx = MK_PTR(r->es, r->ebx.w[0]);
__syslinux_derivative_info.r.fssi = MK_PTR(r->fs, r->esi.w[0]);
__syslinux_derivative_info.r.gsdi = MK_PTR(r->gs, r->edi.w[0]);
}
uint32_t __pci_read_bios(uint32_t call, pciaddr_t a)
{
com32sys_t rs;
memset(&rs, 0, sizeof rs);
rs.eax.w[0] = call;
rs.ebx.w[0] = a >> 8; /* bus:device:function */
rs.edi.b[0] = a; /* address:reg */
__intcall(0x1a, &rs, &rs);
return (rs.eflags.l & EFLAGS_CF) ? ~(uint32_t)0 : rs.ecx.l;
}
void __constructor __syslinux_get_keyboard_map(void)
{
static com32sys_t reg;
reg.eax.w[0] = 0x001e;
__intcall(0x22, ®, ®);
if (!(reg.eflags.l & EFLAGS_CF)) {
__syslinux_keyboard_map.version = reg.eax.w[0];
__syslinux_keyboard_map.length = reg.ecx.w[0];
__syslinux_keyboard_map.map = MK_PTR(reg.es, reg.ebx.w[0]);
}
}
void __constructor __syslinux_get_serial_console_info(void)
{
static com32sys_t reg;
memset(®, 0, sizeof reg);
reg.eax.w[0] = 0x000b;
__intcall(0x22, ®, ®);
__syslinux_serial_console_info.iobase = reg.edx.w[0];
__syslinux_serial_console_info.divisor = reg.ecx.w[0];
__syslinux_serial_console_info.flowctl = reg.ebx.w[0];
}
void execute(const char *cmdline, enum kernel_type type)
{
com32sys_t ireg;
const char *p, * const *pp;
char *q = __com32.cs_bounce;
const char *kernel, *args;
memset(&ireg, 0, sizeof ireg);
kernel = q;
p = cmdline;
while ( *p && !my_isspace(*p) ) {
*q++ = *p++;
}
*q++ = '\0';
args = q;
while ( *p && my_isspace(*p) )
p++;
strcpy(q, p);
if (kernel[0] == '.' && type == KT_NONE) {
/* It might be a type specifier */
enum kernel_type type = KT_NONE;
for (pp = kernel_types; *pp; pp++, type++) {
if (!strcmp(kernel+1, *pp)) {
execute(p, type); /* Strip the type specifier and retry */
}
}
}
if (type == KT_LOCALBOOT) {
ireg.eax.w[0] = 0x0014; /* Local boot */
ireg.edx.w[0] = strtoul(kernel, NULL, 0);
} else {
if (type < KT_KERNEL)
type = KT_KERNEL;
ireg.eax.w[0] = 0x0016; /* Run kernel image */
ireg.esi.w[0] = OFFS(kernel);
ireg.ds = SEG(kernel);
ireg.ebx.w[0] = OFFS(args);
ireg.es = SEG(args);
ireg.edx.l = type-KT_KERNEL;
/* ireg.ecx.l = 0; */ /* We do ipappend "manually" */
}
__intcall(0x22, &ireg, NULL);
/* If this returns, something went bad; return to menu */
}
/* Erase a region of the screen */
static void ansicon_erase(const struct term_state *st,
int x0, int y0, int x1, int y1)
{
static com32sys_t ireg;
ireg.eax.w[0] = 0x0600; /* Clear window */
ireg.ebx.b[1] = ansicon_attribute(st);
ireg.ecx.b[0] = x0;
ireg.ecx.b[1] = y0;
ireg.edx.b[0] = x1;
ireg.edx.b[1] = y1;
__intcall(0x10, &ireg, NULL);
}
void __constructor __syslinux_get_version(void)
{
static com32sys_t reg;
reg.eax.w[0] = 0x0001;
__intcall(0x22, ®, ®);
__syslinux_version.version = reg.ecx.w[0];
__syslinux_version.max_api = reg.eax.w[0];
__syslinux_version.filesystem = reg.edx.b[0];
__syslinux_version.version_string = MK_PTR(reg.es, reg.esi.w[0]);
__syslinux_version.copyright_string = MK_PTR(reg.es, reg.edi.w[0]);
}
static void ansicon_write_char(int x, int y, uint8_t ch,
const struct term_state *st)
{
static com32sys_t ireg;
ansicon_set_cursor(x, y, 0);
ireg.eax.b[1] = 0x09;
ireg.eax.b[0] = ch;
ireg.ebx.b[1] = BIOS_PAGE;
ireg.ebx.b[0] = ansicon_attribute(st);
ireg.ecx.w[0] = 1;
__intcall(0x10, &ireg, NULL);
}
/* Common setup */
int __ansicon_open(struct file_info *fp)
{
static com32sys_t ireg; /* Auto-initalized to all zero */
com32sys_t oreg;
if (!ansicon_counter) {
/* Are we disabled? */
if (syslinux_serial_console_info()->flowctl & 0x8000) {
ti.disabled = 1;
ti.rows = 25;
ti.cols = 80;
} else {
/* Force text mode */
ireg.eax.w[0] = 0x0005;
__intcall(0x22, &ireg, NULL);
/* Initial state */
ti.rows = BIOS_ROWS ? BIOS_ROWS+1 : 25;
ti.cols = BIOS_COLS;
__ansi_init(&ti);
/* Get cursor shape and position */
ireg.eax.b[1] = 0x03;
ireg.ebx.b[1] = BIOS_PAGE;
__intcall(0x10, &ireg, &oreg);
cursor_type = oreg.ecx.w[0];
ti.ts->xy.x = oreg.edx.b[0];
ti.ts->xy.y = oreg.edx.b[1];
}
}
fp->o.rows = ti.rows;
fp->o.cols = ti.cols;
ansicon_counter++;
return 0;
}
static ssize_t __stdcon_write(struct file_info *fp, const void *buf,
size_t count)
{
com32sys_t ireg;
const char *bufp = buf;
size_t n = 0;
(void)fp;
memset(&ireg, 0, sizeof ireg);
ireg.eax.b[1] = 0x02;
while (count--) {
if (*bufp == '\n') {
ireg.edx.b[0] = '\r';
__intcall(0x21, &ireg, NULL);
}
ireg.edx.b[0] = *bufp++;
__intcall(0x21, &ireg, NULL);
n++;
}
return n;
}
static void set_window_pos(size_t win_pos)
{
static com32sys_t ireg;
wi.win_pos = win_pos;
if (wi.win_num < 0)
return; /* This should never happen... */
ireg.eax.w[0] = 0x4F05;
ireg.ebx.b[0] = wi.win_num;
ireg.edx.w[0] = win_pos >> wi.win_gshift;
__intcall(0x10, &ireg, NULL);
}
/*
* Call int 13h, but with retry on failure. Especially floppies need this.
*/
static int int13_retry(const com32sys_t *inreg, com32sys_t *outreg)
{
int retry = 6; /* Number of retries */
com32sys_t tmpregs;
if ( !outreg ) outreg = &tmpregs;
while ( retry-- ) {
__intcall(0x13, inreg, outreg);
if ( !(outreg->eflags.l & EFLAGS_CF) )
return 0; /* CF=0, OK */
}
return -1; /* Error */
}