search for: eflags_cf

...) 1999,2005 Luciano Rocha.\n"); /* clear input registers */ memset(&in, '\0', sizeof in); /* check APM support and version */ in.eax.w[0] = 0x5300; __intcall(0x15, &in, &out); /* version in ax, bx must be equal to "PM" */ if (out.eflags.l & EFLAGS_CF || out.ebx.w[0] != 0x504d) { printf("APM not detected.\n"); return 1; } printf("APM BIOS Version %x.%x found.\n", out.eax.b[1], out.eax.b[0]); flags = out.ecx.w[0]; version = out.eax.w[0]; /* establish connection to APM */ in.eax.b[0] = 1; __intcall(0x15...

...; +#include <com32.h> + +int main() +{ + com32sys_t inregs, outregs; + + memset(&inregs, 0, sizeof inregs); + + inregs.eax.l = 0x5300; /* APM Installation Check (00h) */ + inregs.ebx.l = 0; /* APM BIOS (0000h) */ + __intcall(0x15, &inregs, &outregs); + + if (outregs.eflags.l & EFLAGS_CF) { + printf("APM not present.\n"); + return 1; + } + + if ((outregs.ebx.l & 0xffff) != 0x504d) { /* signature 'PM' */ + printf("APM not present.\n"); + return 1; + } + + if ((outregs.eax.l & 0xffff) < 0x101) { /* Need version 1.1+ */ + printf("APM 1....

Hi all I've written a basic COM32 module that checks (using the DMI example code) the product and BIOS and if the BIOS is not at the required level, is supposed to exit and boot using a DOS floppy image to flash the BIOS. The problem is that I can't work out how to call the DOS floppy image. Looking at the website, I see "Run Command" AX=0003H via int 22. The image name will

I agree. This line was removed during testing because it didn't make big sense (EFLAGS_CF, ebx, and ecx are checked after int 0x13). But it's better to leave it in code to make sure that BIOS conforms standards and clears CF flag on successful call. Adjusted patch is given below. Andy Alex Signed-off-by: Andy Alex <andy at r-tt.com> --- diff -uprN syslinux-6.02.orig/core/fs...

From: Matt Fleming <matt.fleming at intel.com> Since we can't use __intcall() for EFI, and since we can now have the ELF module code resolve all our symbols at runtime, we should delete as many references to __intcall() as possible and just access the symbols directly. The most interesting patch is the support for weak symbols. We need to be able to reference derivative-specific

...ens to be the LBA. */ inregs.eax.w[0] = 0x0006; - inregs.esi.w[0] = OFFS(__com32.cs_bounce); - inregs.es = SEG(__com32.cs_bounce); + inregs.esi.w[0] = OFFS(buf); + inregs.es = SEG(buf); __com32.cs_intcall(0x22, &inregs, &inregs); if ((inregs.eflags.l & EFLAGS_CF) || inregs.esi.w[0] == 0) { - return 0; /* Filename not found */ + goto fail; /* Filename not found */ } /* Since the first member is the LBA, we simply cast */ @@ -121,14 +127,16 @@ uint32_t get_file_lba(const char *filename) memset(&inregs, 0, sizeof(com32sys_t)); /*...

...() which returns a structure pointer in SI - * to a structure whose first member happens to be the LBA. - */ - inregs.eax.w[0] = 0x0006; - inregs.esi.w[0] = OFFS(buf); - inregs.es = SEG(buf); - __com32.cs_intcall(0x22, &inregs, &inregs); - - if ((inregs.eflags.l & EFLAGS_CF) || inregs.esi.w[0] == 0) { + if (open_file(buf, &fd) <= 0) { goto fail; /* Filename not found */ } /* Since the first member is the LBA, we simply cast */ - lba = *((uint32_t *) MK_PTR(inregs.ds, inregs.esi.w[0])); - - /* Clean the registers for the next call */ -...

...ewdir; + com32sys_t regs; + + newdir = NULL; + + strlcpy(__com32.cs_bounce, pathname, __com32.cs_bounce_size); + + regs.eax.w[0] = 0x0020; + regs.esi.w[0] = OFFS(__com32.cs_bounce); + regs.es = SEG(__com32.cs_bounce); + + __com32.cs_intcall(0x22, &regs, &regs); + + if (!(regs.eflags.l & EFLAGS_CF)) { + /* Initialization: malloc() then zero */ + newdir = calloc(1, sizeof(DIR)); + strcpy(newdir->dd_name, pathname); + newdir->dd_fd = regs.esi.w[0]; + newdir->dd_sect = regs.eax.l; + newdir->dd_stat = 0; + } + + /* We're done */ + return newdir; +} diff --git a/com32/lib/re...

...ewdir; + com32sys_t regs; + + newdir = NULL; + + strlcpy(__com32.cs_bounce, pathname, __com32.cs_bounce_size); + + regs.eax.w[0] = 0x001F; + regs.esi.w[0] = OFFS(__com32.cs_bounce); + regs.es = SEG(__com32.cs_bounce); + + __com32.cs_intcall(0x22, &regs, &regs); + + if (!(regs.eflags.l & EFLAGS_CF)) { + /* Initialization: malloc() then zero */ + newdir = calloc(1, sizeof(DIR)); + strcpy(newdir->dd_name, pathname); + newdir->dd_fd = regs.esi.w[0]; + newdir->dd_sect = regs.eax.l; + newdir->dd_stat = 0; + } + + /* We're done */ + return newdir; +} diff --git a/com32/lib/re...

...1 upon failure - */ -int disk_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 */ -} - -/** - * Query disk parameters and EBIOS availability for a particular disk. - * - * @v disk The INT 0x13 disk drive number to process - * @v diskinfo The structure to save the queried params to - * @ret (int) 0 upo...

.../readdir.c index 353b61b..c6d991c 100644 --- a/com32/lib/readdir.c +++ b/com32/lib/readdir.c @@ -33,21 +33,16 @@ struct dirent *readdir(DIR *dir) /* Don't do this as we won't be able to rewind. dir->dd_fd = regs.esi.w[0]; /* Shouldn't be needed? */ if ((!(regs.eflags.l & EFLAGS_CF)) && (regs.esi.w[0] != 0)) { - newde = calloc(1, sizeof(newde)); - if (newde != NULL) { - strcpy(newde->d_name, __com32.cs_bounce); - newde->d_mode = regs.edx.w[0]; - newde->d_type = (newde->d_mode & S_IFMT) >> 12; - newde->d_size = regs.eax.l; -...

DL register is not set to drive number when detecting EDD for drive, so detection may fail. Signed-off-by: Andy Alex<andy at r-tt.com> --- diff -uprN syslinux-6.02.orig/core/fs/diskio_bios.c syslinux-6.02/core/fs/diskio_bios.c --- syslinux-6.02.orig/core/fs/diskio_bios.c 2013-10-13 21:59:03.000000000 +0400 +++ syslinux-6.02/core/fs/diskio_bios.c 2014-02-20 12:15:08.000000000 +0400 @@ -337,7

...+ * Copyright (C) 2013 Raphael S. Carvalho * * Permission is hereby granted, free of charge, to any person * obtaining a copy of this software and associated documentation @@ -92,6 +93,13 @@ int disk_get_params(int disk, struct disk_info *const diskinfo) if (!(outreg.eflags.l & EFLAGS_CF) && outreg.ebx.w[0] == 0xaa55 && (outreg.ecx.b[0] & 1)) { diskinfo->ebios = 1; + diskinfo->ops.disk_op = &ebios_disk_op; + diskinfo->ops.read_code = EBIOS_READ_CODE; + diskinfo->ops.write_code = EBIOS_WRITE_CODE; + } else { + diskinfo->ops.disk_op = &am...

...- disk.h = bsHeads; - disk.s = bsSecPerTrack; + disk->h = bsHeads; + disk->s = bsSecPerTrack; if ((int8_t)devno < 0) { /* Get hard disk geometry from BIOS */ - + ireg.eax.b[1] = 0x08; __intcall(0x13, &ireg, &oreg); - + if (!(oreg.eflags.l & EFLAGS_CF)) { - disk.h = oreg.edx.b[1] + 1; - disk.s = oreg.ecx.b[0] & 63; + disk->h = oreg.edx.b[1] + 1; + disk->s = oreg.ecx.b[0] & 63; } } @@ -370,24 +374,24 @@ struct disk *bios_disk_init(void *private) } - disk.disk_number = devno; - disk.sector_size = sector_...

...turn -1; +??? com32sys_t regs; + +??? strlcpy(__com32.cs_bounce, path, __com32.cs_bounce_size); + +??? regs.eax.w[0] = 0x0025; +??? regs.esi.w[0] = OFFS(__com32.cs_bounce); +??? regs.es = SEG(__com32.cs_bounce); + +??? __com32.cs_intcall(0x22, &regs, &regs); + +??? if (!(regs.eflags.l & EFLAGS_CF)) { +??? ??? return -1; +??? } + +??? /* We're done */ +??? return 0; ?} + diff -u -r -X nodiff syslinux-3.82-orig/core/comboot.inc syslinux-3.82/core/comboot.inc --- syslinux-3.82-orig/core/comboot.inc 2009-06-09 10:19:25.000000000 -0700 +++ syslinux-3.82/core/comboot.inc 2009-07-27 11:2...

Hello, the following patches should get multidisk access working. The syntax accepted is the following: (hdx,y)/path/to/file where x is the disk number and start at 0 and the y is the partition number starting at 1. So (hd0,1) is the first partition of the first disk. the other accepted syntax is using MBR's 32 bits disk signature so for example: (mbr:0x12345678,2)/foo/bar would address

From: Matt Fleming <matt.fleming at intel.com> The following patch series is available at, git://git.zytor.com/users/mfleming/syslinux.git elflink All patches are against the 'elflink' branch. This series fixes a few serious bugs and some behavioural incompatibilities with the 4.x series. Matt Fleming (19): ldlinux: Initialise 'p' before using it. ldlinux: Parse

Hi, I've checked the archives for my issue, and while there is relevant discussion, the problem the original poster was asking about didn't seem to have been resolved then either (~2 years ago). At any rate, basically what I'm trying to do is send (possibly receive) UDP packets via the PXE stack using the com32 API (using version 3.11 of syslinux). I have followed both the comboot

From: Matt Fleming <matt.fleming at linux.intel.com> This series fixes some bugs and switches the elflink branch to be entirely ELF modules. It applies on top of, http://syslinux.zytor.com/archives/2011-April/016369.html The deletions in the diff stat below are mainly from deleting com32/elflink/modules (finally!). Now there should be no duplicate code because we don't need COM32 and

So last week I was wondering if XFS was still working -- even with its last on-disk structure changes -- and it _suprisingly_ worked as expected. Right, now I can finally get rid of GRUB and use Syslinux to boot my Linux on EFI from a rootfs with xfs. Shit, I have two partitions (the first one being the required ESP) so there is no way to access the other partitions since because Syslinux does not