search for: ljmp

...(gdb) target remote localhost:1234 Remote debugging using localhost:1234 0x0000fff0 in ?? () at localboot.inc:68 68 jmp kaboom ; If we returned, oh boy... How does "jmp kaboom" get here? We are at the BIOS entry point: (gdb) display/10i $cs*16+$eip 1: x/10i $cs * 16 + $eip 0xffff0: ljmp $0xf000,$0xe05b [...] (gdb) info symbol 0x7c00 bootsec in section .text (gdb) b bootsec Note: breakpoint -2 also set at pc 0x7c00. Breakpoint 1 at 0x7c00: file extlinux.asm, line 146. Breakpoint -2? That's new for me. Anyway: (gdb) c Continuing. ^C Program received signal SIGINT, Interrup...

...symbols in that area + movl $BOOT_TRAMPOLINE, %eax + shrl $4, %eax + movl %eax, %fs + lidt %fs:bootsym(idt_48) + lgdt %fs:bootsym(gdt_48) + + movw $1, %ax + lmsw %ax # Turn on CR0.PE + jmp 1f +1: + ljmpl $BOOT_CS32, $bootsym_phys(wakeup_32) + +/* This code uses an extended set of video mode numbers. These include: + * Aliases for standard modes + * NORMAL_VGA (-1) + * EXTENDED_VGA (-2) + * ASK_VGA (-3) + * Video modes numbered by menu position -- NOT RECOMMENDED because of lack +...

I just got the following message on the syslinux mailing list: > 2. On some platforms (vmware for example :), READING from the video memory > in the 32bit mode is impossible (causes an exeption). Taking in to account > that the scroll function in ilinux/arch/i386/boot/compressed/misc.c > works using a memcpy of the video memory, when the linux bootsector is given >

I just got the following message on the syslinux mailing list: > 2. On some platforms (vmware for example :), READING from the video memory > in the 32bit mode is impossible (causes an exeption). Taking in to account > that the scroll function in ilinux/arch/i386/boot/compressed/misc.c > works using a memcpy of the video memory, when the linux bootsector is given >

I just got the following message on the syslinux mailing list: > 2. On some platforms (vmware for example :), READING from the video memory > in the 32bit mode is impossible (causes an exeption). Taking in to account > that the scroll function in ilinux/arch/i386/boot/compressed/misc.c > works using a memcpy of the video memory, when the linux bootsector is given >

...mov %rsi, %rbx + + call base_address +base_address: + pop %rsi + + /* need to perform a long jump to update cs + + /* load absolute address of pm_code in jmp_address location */ + lea (pm_code - base_address)(%rsi, 1), %rax + mov %eax, (jmp_address - base_address)(%rsi, 1) + + ljmp *(jmp_address - base_address)(%rsi, 1) + +jmp_address: + .long 0 /* address */ + .word 0x10 /* segment */ .code32 pm_code: - /* Disable IA-32e mode by clearing IA32_EFER.LME */ - xorl %eax, %eax - xorl %edx, %edx - movl $MSR_EFER, %ecx - wrmsr + /* cs seg...

...l_jump function) */ + mov %rsi, %rbx + + call base_address +base_address: + pop %rsi + + /* need to perform a long jump to update cs + + /* load absolute address of pm_code in jmp_address location */ + lea (pm_code - base_address)(%rsi, 1), %rax + mov %eax, (jmp_address - base_address)(%rsi, 1) + + ljmp *(jmp_address - base_address)(%rsi, 1) + +jmp_address: + .long 0 /* address */ + .word 0x10 /* segment */ .code32 pm_code: - /* Disable IA-32e mode by clearing IA32_EFER.LME */ - xorl %eax, %eax - xorl %edx, %edx - movl $MSR_EFER, %ecx - wrmsr + /* cs segment has been updated, now update th...

...# set up page table +#ifndef __XEN__ movl $swsusp_pg_dir-__PAGE_OFFSET, %eax +#else + movl $idle_pg_table-__PAGE_OFFSET, %eax +#endif movl %eax, %cr3 testl $1, real_efer_save_restore - wakeup_code @@ -88,7 +97,11 @@ 1: cmpl $0x12345678, %eax jne bogus_real_magic +#ifndef __XEN__ ljmpl $__KERNEL_CS,$wakeup_pmode_return +#else + ljmpl $(__HYPERVISOR_CS),$wakeup_pmode_return +#endif real_save_gdt: .word 0 .long 0 @@ -184,7 +197,11 @@ ENTRY(wakeup_end) .org 0x1000 wakeup_pmode_return: +#ifndef __XEN__ movw $__KERNEL_DS, %ax +#else + movw $__HYPERVISOR_DS, %ax +#end...

OK, here it is. Benchmarks still coming. This is against Andi's 2.6.18-rc7-git3 tree, and replaces the patches between (and not including) i386-pda-asm-offsets and i386-early-fault. One patch is identical, one is mildly modified, the rest are re-implemented but inspired by Jeremy's PDA work. Thanks, Rusty. -- Help! Save Australia from the worst of the DMCA: http://linux.org.au/law

OK, here it is. Benchmarks still coming. This is against Andi's 2.6.18-rc7-git3 tree, and replaces the patches between (and not including) i386-pda-asm-offsets and i386-early-fault. One patch is identical, one is mildly modified, the rest are re-implemented but inspired by Jeremy's PDA work. Thanks, Rusty. -- Help! Save Australia from the worst of the DMCA: http://linux.org.au/law

...hoff + .int 0 # e_flags + .word e_ehdr - ehdr # e_ehsize + .word e_phdr1 - phdr # e_phentsize + .word (e_phdr - phdr)/(e_phdr1 - phdr) # e_phnum + .word 40 # e_shentsize + .word 0 # e_shnum + .word 0 # e_shstrndx +e_ehdr: + + .org 71 +normalize: # Normalize the start address ljmp $BOOTSEG, $start2 + + .org 80 +phdr: + .int PT_LOAD # p_type + .int _text # p_offset + .int 0x8000 # p_vaddr + .int 0x8000 # p_paddr + .int _filesz # p_filesz + .int _memsz # p_memsz + .int PF_R | PF_W | PF_X # p_flags + .int 4 # p_align +e_phdr1: + .int PT_LOAD...

...hoff + .int 0 # e_flags + .word e_ehdr - ehdr # e_ehsize + .word e_phdr1 - phdr # e_phentsize + .word (e_phdr - phdr)/(e_phdr1 - phdr) # e_phnum + .word 40 # e_shentsize + .word 0 # e_shnum + .word 0 # e_shstrndx +e_ehdr: + + .org 71 +normalize: # Normalize the start address ljmp $BOOTSEG, $start2 + + .org 80 +phdr: + .int PT_LOAD # p_type + .int _text # p_offset + .int 0x8000 # p_vaddr + .int 0x8000 # p_paddr + .int _filesz # p_filesz + .int _memsz # p_memsz + .int PF_R | PF_W | PF_X # p_flags + .int 4 # p_align +e_phdr1: + .int PT_LOAD...

Hi Andrew, This patch series adds to the end of the existing i386-gdt-cleanups patches: allow-per-cpu-variables-to-be-page-aligned.patch i386-gdt-cleanups-use-per-cpu-variables-for-gdt-pda.patch i386-gdt-cleanups-use-per-cpu-gdt-immediately-upon-boot.patch i386-gdt-cleanups-use-per-cpu-gdt-immediately-upon-boot-fix.patch i386-gdt-cleanups-clean-up-cpu_init.patch

Hi Andrew, This patch series adds to the end of the existing i386-gdt-cleanups patches: allow-per-cpu-variables-to-be-page-aligned.patch i386-gdt-cleanups-use-per-cpu-variables-for-gdt-pda.patch i386-gdt-cleanups-use-per-cpu-gdt-immediately-upon-boot.patch i386-gdt-cleanups-use-per-cpu-gdt-immediately-upon-boot-fix.patch i386-gdt-cleanups-clean-up-cpu_init.patch

Hi Jeremy, all, Sorry this took so long, spent last week in Japan at OSDL conf then netconf. After several false starts, I ended up with a very simple implementation, which clashes significantly with your work since then 8(. I've pushed the patches anyway, but it's going to be significant work for me to re-merge them, so I wanted your feedback first. The first patch simply changes

Hi Jeremy, all, Sorry this took so long, spent last week in Japan at OSDL conf then netconf. After several false starts, I ended up with a very simple implementation, which clashes significantly with your work since then 8(. I've pushed the patches anyway, but it's going to be significant work for me to re-merge them, so I wanted your feedback first. The first patch simply changes

Hi Andi, This is a series of patches based on your latest queue (as of the other day, at least). It includes: - the most recent patch to compute the appropriate amount of percpu space to allocate, using a separate reservation for modules where needed. - make the percpu sections page-aligned, so that percpu variables can be page aligned if needed (which is used by gdt_page) -

Hi Andi, This is a series of patches based on your latest queue (as of the other day, at least). It includes: - the most recent patch to compute the appropriate amount of percpu space to allocate, using a separate reservation for modules where needed. - make the percpu sections page-aligned, so that percpu variables can be page aligned if needed (which is used by gdt_page) -

Hi Andi, This is a set of updates for the firstfloor patch queue. Quick rundown: revert-mm-x86_64-mm-account-for-module-percpu-space-separately-from-kernel-percpu.patch separate-module-percpu-space.patch Update the module percpu accounting patch fix-ff-allow-percpu-variables-to-be-page-aligned.patch Make sure the percpu memory allocation is page-aligned

Hi Andi, This is a set of updates for the firstfloor patch queue. Quick rundown: revert-mm-x86_64-mm-account-for-module-percpu-space-separately-from-kernel-percpu.patch separate-module-percpu-space.patch Update the module percpu accounting patch fix-ff-allow-percpu-variables-to-be-page-aligned.patch Make sure the percpu memory allocation is page-aligned