search for: bogus_64_mag

...rnel/acpi/wakeup_64.S > @@ -14,7 +14,7 @@ > * Hooray, we are in Long 64-bit mode (but still running in low memory) > */ > ENTRY(wakeup_long64) > - movq saved_magic, %rax > + movq saved_magic(%rip), %rax > movq $0x123456789abcdef0, %rdx > cmpq %rdx, %rax > jne bogus_64_magic Because, as comment says, this is rather tricky code. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signat...

...rnel/acpi/wakeup_64.S > @@ -14,7 +14,7 @@ > * Hooray, we are in Long 64-bit mode (but still running in low memory) > */ > ENTRY(wakeup_long64) > - movq saved_magic, %rax > + movq saved_magic(%rip), %rax > movq $0x123456789abcdef0, %rdx > cmpq %rdx, %rax > jne bogus_64_magic Because, as comment says, this is rather tricky code. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signat...

...> memory) > > > */ > > > ENTRY(wakeup_long64) > > > - movq saved_magic, %rax > > > + movq saved_magic(%rip), %rax > > > movq $0x123456789abcdef0, %rdx > > > cmpq %rdx, %rax > > > jne bogus_64_magic > > > Because, as comment says, this is rather tricky code. > > I agree, I think maintainers feedback is very important for this patchset. -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html ---...

...> memory) > > > */ > > > ENTRY(wakeup_long64) > > > - movq saved_magic, %rax > > > + movq saved_magic(%rip), %rax > > > movq $0x123456789abcdef0, %rdx > > > cmpq %rdx, %rax > > > jne bogus_64_magic > > > Because, as comment says, this is rather tricky code. > > I agree, I think maintainers feedback is very important for this patchset. -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html ---...

...x86/kernel/acpi/wakeup_64.S +++ b/arch/x86/kernel/acpi/wakeup_64.S @@ -14,7 +14,7 @@ * Hooray, we are in Long 64-bit mode (but still running in low memory) */ ENTRY(wakeup_long64) - movq saved_magic, %rax + movq saved_magic(%rip), %rax movq $0x123456789abcdef0, %rdx cmpq %rdx, %rax jne bogus_64_magic @@ -25,14 +25,14 @@ ENTRY(wakeup_long64) movw %ax, %es movw %ax, %fs movw %ax, %gs - movq saved_rsp, %rsp + movq saved_rsp(%rip), %rsp - movq saved_rbx, %rbx - movq saved_rdi, %rdi - movq saved_rsi, %rsi - movq saved_rbp, %rbp + movq saved_rbx(%rip), %rbx + movq saved_rdi(%rip), %rdi + mo...

...ng 64-bit mode (but still running in low memory) > > */ > > ENTRY(wakeup_long64) > > - movq saved_magic, %rax > > + movq saved_magic(%rip), %rax > > movq $0x123456789abcdef0, %rdx > > cmpq %rdx, %rax > > jne bogus_64_magic > Because, as comment says, this is rather tricky code. I agree, I think maintainers feedback is very important for this patchset. Pavel > -- > (english) http://www.livejournal.com/~pavelmachek > (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html...

...*/ > > > > ENTRY(wakeup_long64) > > > > - movq saved_magic, %rax > > > > + movq saved_magic(%rip), %rax > > > > movq $0x123456789abcdef0, %rdx > > > > cmpq %rdx, %rax > > > > jne bogus_64_magic > > > > > Because, as comment says, this is rather tricky code. > > > > I agree, I think maintainers feedback is very important for this patchset. > -- > (english) http://www.livejournal.com/~pavelmachek > (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pa...

Changes: - patch v3: - Update on message to describe longer term PIE goal. - Minor change on ftrace if condition. - Changed code using xchgq. - patch v2: - Adapt patch to work post KPTI and compiler changes - Redo all performance testing with latest configs and compilers - Simplify mov macro on PIE (MOVABS now) - Reduce GOT footprint - patch v1: - Simplify ftrace

Changes: - patch v2: - Adapt patch to work post KPTI and compiler changes - Redo all performance testing with latest configs and compilers - Simplify mov macro on PIE (MOVABS now) - Reduce GOT footprint - patch v1: - Simplify ftrace implementation. - Use gcc mstack-protector-guard-reg=%gs with PIE when possible. - rfc v3: - Use --emit-relocs instead of -pie to reduce

Changes: - patch v2: - Adapt patch to work post KPTI and compiler changes - Redo all performance testing with latest configs and compilers - Simplify mov macro on PIE (MOVABS now) - Reduce GOT footprint - patch v1: - Simplify ftrace implementation. - Use gcc mstack-protector-guard-reg=%gs with PIE when possible. - rfc v3: - Use --emit-relocs instead of -pie to reduce

These patches make the changes necessary to build the kernel as Position Independent Executable (PIE) on x86_64. A PIE kernel can be relocated below the top 2G of the virtual address space. It allows to optionally extend the KASLR randomization range from 1G to 3G. Thanks a lot to Ard Biesheuvel & Kees Cook on their feedback on compiler changes, PIE support and KASLR in general. Thanks to

These patches make the changes necessary to build the kernel as Position Independent Executable (PIE) on x86_64. A PIE kernel can be relocated below the top 2G of the virtual address space. It allows to optionally extend the KASLR randomization range from 1G to 3G. Thanks a lot to Ard Biesheuvel & Kees Cook on their feedback on compiler changes, PIE support and KASLR in general. Thanks to

Changes: - patch v1: - Simplify ftrace implementation. - Use gcc mstack-protector-guard-reg=%gs with PIE when possible. - rfc v3: - Use --emit-relocs instead of -pie to reduce dynamic relocation space on mapped memory. It also simplifies the relocation process. - Move the start the module section next to the kernel. Remove the need for -mcmodel=large on modules. Extends

Changes: - patch v1: - Simplify ftrace implementation. - Use gcc mstack-protector-guard-reg=%gs with PIE when possible. - rfc v3: - Use --emit-relocs instead of -pie to reduce dynamic relocation space on mapped memory. It also simplifies the relocation process. - Move the start the module section next to the kernel. Remove the need for -mcmodel=large on modules. Extends