search for: jnc

...+++ syslinux-3.80-pre7/modules/poweroff.asm @@ -0,0 +1,86 @@ + absolute 0 +pspInt20: resw 1 +pspNextP: resw 1 + resb 124 +pspCmdLen: resb 1 +pspCmdArg: resb 127 + + section .text + org 0x100 + +_start: + mov ax,5300h ; APM Installation Check (00h) + xor bx,bx ; APM BIOS (0000h) + int 15h + jnc check_sig + + mov bx, msg_notpresent + jmp error + +check_sig: + cmp bx,504Dh ; signature 'PM' + je check_ver + + mov bx, msg_notpresent + jmp error + +check_ver: + cmp ax,0101h ; Need version 1.1+ + jae check_state + + mov bx, msg_notsup + jmp error + +check_state: + test cx,8 ;...

...print 1 mov dx, %1 mov ah, 0x9 int 0x21 %endmacro %macro apm 3 mov ah, 0x53 mov al, %1 mov bx, %2 mov cx, %3 int 0x15 %endmacro section .text cpu 8086 org 0100h _start: ; echo (C) print msg_cpy ; check APM support apm 0, 0, 0 jnc apm_checkver ; APM not found noapm: print msg_noapm jmp exit ; check bx for PM apm_checkver: cmp bx, 0x504d jne noapm ; save flags and version mov [apm_flags], cx mov [apm_version], ax ; show apm version add ax, 0x3030 mov [apm_ver_maj], ah mov [apm_ver_min], al print msg_apm...

...est. /* Check to see if we have EBIOS */ pushw %dx /* drive number */ movb $0x41, %ah /* %al == 0 already */ movw $0x55aa, %bx xorw %cx, %cx xorb %dh, %dh stc int $0x13 //XXX jc 1f jnc 1f cmpw $0xaa55, %bx jne 1f andw $1,%cx /* Bit 0 = fixed disk subset */ jz 1f With that jc changed to jnc you will invert the result of the EBIOS test and my qemu always has EBIOS. Download the resulting isohdpfx here: <http://www.ludd....

...(system_call) * No need to follow this irqs off/on section - it's straight * and short: */ - sti + ENABLE_INTERRUPTS(CLBR_NONE) SAVE_ARGS 8,1 movq %rax,ORIG_RAX-ARGOFFSET(%rsp) movq %rcx,RIP-ARGOFFSET(%rsp) @@ -270,7 +280,7 @@ sysret_careful: bt $TIF_NEED_RESCHED,%edx jnc sysret_signal TRACE_IRQS_ON - sti + ENABLE_INTERRUPTS(CLBR_NONE) pushq %rdi CFI_ADJUST_CFA_OFFSET 8 call schedule @@ -281,7 +291,7 @@ sysret_careful: /* Handle a signal */ sysret_signal: TRACE_IRQS_ON - sti + ENABLE_INTERRUPTS(CLBR_NONE) testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_T...

...(system_call) * No need to follow this irqs off/on section - it's straight * and short: */ - sti + ENABLE_INTERRUPTS(CLBR_NONE) SAVE_ARGS 8,1 movq %rax,ORIG_RAX-ARGOFFSET(%rsp) movq %rcx,RIP-ARGOFFSET(%rsp) @@ -270,7 +280,7 @@ sysret_careful: bt $TIF_NEED_RESCHED,%edx jnc sysret_signal TRACE_IRQS_ON - sti + ENABLE_INTERRUPTS(CLBR_NONE) pushq %rdi CFI_ADJUST_CFA_OFFSET 8 call schedule @@ -281,7 +291,7 @@ sysret_careful: /* Handle a signal */ sysret_signal: TRACE_IRQS_ON - sti + ENABLE_INTERRUPTS(CLBR_NONE) testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_T...

...de later than it should've -- the Pentium1 MMX from 1997 already had a hardware return stack which made this a really bad idea! What it does now is have the called function set or clear the carry flag (using STC and CLC) immediately before the return. If the caller cares, then the caller emits JNC as the first instruction after the call. (but callers typically do not care -- most calls only consume a single value, and any extra return-values are silently ignored). On Sun, Jul 21, 2019, 6:18 AM Jacob Lifshay via llvm-dev < llvm-dev at lists.llvm.org> wrote: > one (non-LLVM) proble...

I found that the version of isolinux.bin (and the debug version too) doesn't work on my Via C3 system. I get the SAY text, but never the boot: prompt. C-A-Del doesn't reboot either. The debug version does not print anything after announcing it's opening the config file. Only the single SAY text follows. The cursor sits on the next blank line, useless (no responses to key presses).

...minate if first line as we rolled over the end + mov al,0 + stosb + +.vfat_find_next: ;Find the next part of the name + pop di + pop si + pop ecx + pop eax + cmp dl,0 + jz .vfat_find_info ; We're done with the name + add si,DIRENT_SIZE + dec cx + jnz .vfat_entry + call nextsector + jnc .vfat_entry ; CF is set if we're at end + jmp .fail +.vfat_find_info: ; Fetch next entry for the size/"INode" + add si,DIRENT_SIZE + dec cx + jnz .get_info + call nextsector + jnc .get_info ; CF is set if we're at end + jmp .fail +.vfat_abort: ; Something went wrong, s...

...minate if first line as we rolled over the end + mov al,0 + stosb + +.vfat_find_next: ;Find the next part of the name + pop di + pop si + pop ecx + pop eax + cmp dl,0 + jz .vfat_find_info ; We're done with the name + add si,DIRENT_SIZE + dec cx + jnz .vfat_entry + call nextsector + jnc .vfat_entry ; CF is set if we're at end + jmp .fail +.vfat_find_info: ; Fetch next entry for the size/"INode" + add si,DIRENT_SIZE + dec cx + jnz .get_info + call nextsector + jnc .get_info ; CF is set if we're at end + jmp .fail +.vfat_abort: ; Something went wrong, s...

...n: +; edx filename buffer (64 bytes) +; +cb_status: + mov edx,cs + shl edx,4 + add edx,fname_buf + + xor al,al + ret + +; Open file +; +; return: +; al 0: ok, 1: file not found +; ecx file length (al = 0) +; +cb_fopen: + push ds + pop es + mov ax,6 + mov si,fname_buf + int 22h + jnc cb_fopen_ok + mov al,1 + jmp cb_fopen_end +cb_fopen_ok: + mov ecx,eax + mov [f_handle],si + mov [f_size],ecx + xor al,al +cb_fopen_end: + ret + +; Read next chunk +; +; return: +; edx buffer address (linear) +; ecx data length (< 64k) +; +cb_fread: + cmp dword [f_size],0 + jz cb_f...

...=0 - in emulation mode ; DL - drive number for emulation get_emul_drive: push ax push si ; mov [spec_packet], 13h mov dl, 0ffh ; drive number get_emul_drive1: mov ax, 4b01h ; get status mov [spec_packet], 0 call int13 ; Bogus Dell PC's do not return carry flag correctly - ignoring it ; jnc get_emul_drive_ok ; some bogus bioses (Dell Inspiron 2500) returns packet size 0xff when failed ; Dell Dimension XPsT returns packet size 0x14 when OK cmp [spec_packet], 13h ; anything between 13h and 20h should be OK jb get_emul_trynext cmp [spec_packet], 20h ja get_emul_trynext jmp short g...

...ndex: syslinux-3.82-440-g6483c80/modules/gfxboot.asm =================================================================== --- syslinux-3.82-440-g6483c80.orig/modules/gfxboot.asm +++ syslinux-3.82-440-g6483c80/modules/gfxboot.asm @@ -417,6 +417,14 @@ gfx_read_file: mov si,pspCmdArg+1 int 22h jnc gfx_file_read + + mov ax,2 + mov bx,pspCmdArg+1 + int 22h + + mov ax,2 + mov bx,msg_not_found + int 22h stc ret @@ -890,6 +898,7 @@ msg_memory db 'Could not detect availab msg_bootlogo_toobig db 'bootlogo file too big',0dh,0ah,0 msg_pxelinux db 'pxelinux is not sup...

...n: +; edx filename buffer (64 bytes) +; +cb_status: + mov edx,cs + shl edx,4 + add edx,fname_buf + + xor al,al + ret + +; Open file +; +; return: +; al 0: ok, 1: file not found +; ecx file length (al = 0) +; +cb_fopen: + push ds + pop es + mov ax,6 + mov si,fname_buf + int 22h + jnc cb_fopen_ok +cb_fopen_failed: + mov al,1 + jmp cb_fopen_end +cb_fopen_ok: + mov ecx,eax + mov [f_handle],si + mov [f_size],ecx + xor al,al +cb_fopen_end: + ret + +; Read next chunk +; +; return: +; edx buffer address (linear) +; ecx data length (< 64k) +; +cb_fread: + cmp dword [f_...

Thomas Schmitt wrote: > My main point of interest is which block is really loaded as first one > of isolinux.bin. [Program snipped.] > (It could be shorter if i did not insist in big endian words.) Why insisting? Anyway appended is a dumper version. I could put up a binery version if needed. Let me know if so. -- MartinS /*

...k module Product: netfilter/iptables Version: linux-2.6.x Platform: x86_64 OS/Version: Fedora Status: NEW Severity: critical Priority: P2 Component: unknown AssignedTo: laforge@netfilter.org ReportedBy: jnc@astrakhan.ru This is Fedora Core 6 x86_64 fresh installation, 2.6.19-1.2911.fc6 kernel. Problem is, that when unloading ip_conntrack module, a kernel oops occurs. When only ip_conntrack_ftp / ip_nat_ftp modules are loaded, the below happens. When ip_conntrack_pptp / ip_nat_pptp modules are...

...have EBIOS */ pushw %dx /* drive number */ movb $0x41, %ah /* %al == 0 already */ movw $0x55aa, %bx xorw %cx, %cx xorb %dh, %dh stc int $0x13 popw %dx /* restore drive */ movb $0x08, %ah /* get CHS geometry */ jc 1f cmpw $0xaa55, %bx jne 1f shrw %cx /* Bit 0 = fixed disk subset */ jnc 1f /* We have EBIOS; patch in the following code at read_sector_cbios: movb $0x42, %ah ; jmp read_common */ movl $0xeb42b4+((read_common-read_sector_cbios-4) << 24), \ (read_sector_cbios) /* * read sector size. * Should not fail but if it does I assume that at least * previo...

...S returns no carry indicating maybe support. However it doesn't set BX to the correct value, so isohdpfx.S jumps to 1f with some flags in CX set. Or David's machine's BIOS returns carry but corrupts CX. My versions of isohdpfc just replaced the first "jc 1f" above with "jnc 1f" or with "jmp 1f", thus in the end possibly indicating EBIOS support to isolinux (assuming weird return status on the EBIOS check). Then I interpret the code in isolinux that when EBIOS calls doesn't work it will fall back to old not extended calls (CBIOS?). That's why it...

...E_IRQS_OFF movl threadinfo_flags(%rcx),%edx andl %edi,%edx @@ -261,7 +269,7 @@ sysret_check: /*CFI_REGISTER rflags,r11*/ movq %gs:pda_oldrsp,%rsp swapgs - sysretq + SYSRETQ CFI_RESTORE_STATE /* Handle reschedules */ @@ -270,7 +278,7 @@ sysret_careful: bt $TIF_NEED_RESCHED,%edx jnc sysret_signal TRACE_IRQS_ON - sti + ENABLE_INTERRUPTS(CLBR_NONE) pushq %rdi CFI_ADJUST_CFA_OFFSET 8 call schedule @@ -281,7 +289,7 @@ sysret_careful: /* Handle a signal */ sysret_signal: TRACE_IRQS_ON - sti + ENABLE_INTERRUPTS(CLBR_NONE) testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_T...

...E_IRQS_OFF movl threadinfo_flags(%rcx),%edx andl %edi,%edx @@ -261,7 +269,7 @@ sysret_check: /*CFI_REGISTER rflags,r11*/ movq %gs:pda_oldrsp,%rsp swapgs - sysretq + SYSRETQ CFI_RESTORE_STATE /* Handle reschedules */ @@ -270,7 +278,7 @@ sysret_careful: bt $TIF_NEED_RESCHED,%edx jnc sysret_signal TRACE_IRQS_ON - sti + ENABLE_INTERRUPTS(CLBR_NONE) pushq %rdi CFI_ADJUST_CFA_OFFSET 8 call schedule @@ -281,7 +289,7 @@ sysret_careful: /* Handle a signal */ sysret_signal: TRACE_IRQS_ON - sti + ENABLE_INTERRUPTS(CLBR_NONE) testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_T...

...be > support. However it doesn't set BX to the correct value, so isohdpfx.S > jumps to 1f with some flags in CX set. > > Or David's machine's BIOS returns carry but corrupts CX. > > My versions of isohdpfc just replaced the first "jc 1f" above with > "jnc 1f" or with "jmp 1f", thus in the end possibly indicating EBIOS > support to isolinux (assuming weird return status on the EBIOS check). > > Then I interpret the code in isolinux that when EBIOS calls doesn't > work it will fall back to old not extended calls (CBIOS?)...