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Questions tagged x86-64

43 questions

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13
votes
4
answers

Signed saturated add of 64-bit ints?

c optimization x86-64 addition saturation-arithmetic
asked 2013-07-10T20:16:54.727
12
votes
1
answers

What does the ".align" directive mean in x86-64 Assembly?

assembly x86 x86-64 cpu-architecture
asked 2013-06-25T19:15:33.730
22
votes
2
answers

How to specify register constraints on the Intel x86_64 register r8 to r15 in GCC inline assembly?

assembly gcc x86-64 inline-assembly cpu-registers
asked 2013-06-18T02:08:28.960
24
votes
1
answers

g++ Optimization Flags: -fuse-linker-plugin vs -fwhole-program

c++ linux g++ x86-64 ld
asked 2013-03-25T03:09:15.330
18
votes
1
answers

What does the "mov rax, QWORD PTR fs:0x28" assembly instruction do?

linux assembly gdb x86-64
asked 2013-01-19T13:15:02.467
19
votes
1
answers

where is amd64 psABI?

linux macos x86-64 calling-convention abi
asked 2012-12-18T00:41:02.647
9
votes
2
answers

What is the meaning of the terms 'amd64' 'x64' and 'x86'?

x86 64-bit x86-64
asked 2012-11-11T18:49:18.263
8
votes
3
answers

Minimal overhead way of intercepting system calls without modifying the kernel

c linux gcc x86-64 system-calls
asked 2012-07-02T10:12:07.567
8
votes
1
answers

Why does setjmp(3) not save all registers on AMD64?

x86-64 setjmp
asked 2012-07-01T20:25:42.340
21
votes
2
answers

How do I interpet this x86_64 assembly opcode?

assembly x86-64
asked 2012-06-24T19:52:28.490
11
votes
3
answers

How fast is an atomic/interlocked variable compared to a lock, with or without contention?

c++ multithreading performance x86-64 thread-synchronization
asked 2012-06-13T09:28:26.153
36
votes
2
answers

Is syscall an instruction on x86_64?

c linux gcc x86-64 machine-instruction
asked 2012-05-14T13:03:32.767
36
votes
4
answers

How to compile my own glibc C standard library from source and use it?

c linux gcc x86-64 glibc
asked 2012-05-02T11:19:51.787
14
votes
1
answers

Cost of a page fault trap

c linux memory-management x86-64
asked 2012-04-19T07:44:59.473
21
votes
2
answers

How fast is thread local variable access on Linux

c linux multithreading gcc x86-64
asked 2012-03-28T14:46:21.880
8
votes
3
answers

ELF Shared Object in x86-64 Assembly language

gcc assembly linker shared-libraries x86-64
asked 2012-02-18T12:39:29.993
18
votes
5
answers

x86_64 Assembly Linux System Call Confusion

linux assembly x86-64 system-calls gnu-assembler
asked 2011-12-14T19:16:04.270
19
votes
2
answers

Is reserving stack space necessary for functions less than four arguments?

assembly stack x86-64 calling-convention win64
asked 2011-09-12T18:39:41.003
14
votes
2
answers

How does the gettimeofday syscall wor‍k?

linux assembly x86-64 system-calls vdso
asked 2011-09-01T06:36:30.647
154
votes
11
answers

Why do x86-64 systems have only a 48 bit virtual address space?

x86-64 virtual-memory cpu-architecture
asked 2011-07-16T11:09:23.487
9
votes
2
answers

task gate, interrupt gate, call gate

linux-kernel x86 x86-64
asked 2011-07-13T17:50:06.957
11
votes
1
answers

In assembly, how do you deal with C struct?

assembly struct x86-64 gnu-assembler
asked 2011-07-01T15:04:11.190
45
votes
8
answers

What causes page faults?

windows x86 paging x86-64
asked 2011-04-16T03:59:12.810
147
votes
4
answers

Why does Windows64 use a different calling convention from all other OSes on x86-64?

windows assembly x86-64 calling-convention abi
asked 2010-12-13T13:45:52.447
11
votes
3
answers

Building a Control-flow Graph using results from Objdump

c assembly x86-64 objdump control-flow-graph
asked 2010-11-25T04:50:10.243
18
votes
5
answers

C++ 64 bit int: pass by reference or pass by value

c++ performance pass-by-reference 32bit-64bit x86-64
asked 2010-11-10T10:50:20.580
14
votes
3
answers

Got "Access is denied" when I tried to install 64-bit mongodb in Windows server 2008

mongodb x86-64 windows-server-2008-r2
asked 2010-11-04T16:32:49.650
9
votes
1
answers

gcc - writing and executing code in the bss - setting the permission flags

c linux gcc assembly x86-64
asked 2010-09-10T11:56:14.487
14
votes
4
answers

How can I create a parallel stack and run a coroutine on it?

c assembly stack x86-64 coroutine
asked 2010-06-22T02:24:57.483
11
votes
3
answers

Cross compile windows 64 bit .exe from linux

gcc 64-bit cross-compiling x86-64
asked 2010-04-22T10:03:14.183
11
votes
4
answers

How can I write a "Hello World" app in assembly language?

assembly x86 x86-64
asked 2010-04-16T14:39:24.847
9
votes
3
answers

Detecting architecture at compile time from MASM/MASM64

assembly x86-64 cpu-architecture masm masm32
asked 2010-04-07T20:08:33.953
36
votes
6
answers

Why does Visual Studio use xchg ax,ax

assembly code-generation x86-64
asked 2010-01-25T22:10:47.477
19
votes
3
answers

Advice for learning Linux x86-64 assembly & documentation

documentation assembly x86 x86-64 doc
asked 2009-10-16T00:59:11.217
9
votes
4
answers

Assembly and multicore CPUs

assembly x86 multicore x86-64
asked 2009-10-04T14:23:33.797
45
votes
19
answers

Porting 32 bit C++ code to 64 bit - is it worth it? Why?

c++ x86 64-bit x86-64 cpu-architecture
asked 2009-09-25T23:24:49.160
10
votes
2
answers

What 64bit target to choose when compiling with Visual Studio (vcvarsall.bat)?

64-bit x86-64 itanium
asked 2009-08-10T09:05:45.027
12
votes
2
answers

Syscall from inline asm in x86_64 Linux?

c linux assembly x86-64 inline-assembly
asked 2009-07-30T01:32:04.497
10
votes
7
answers

How to use "GS:" in 64-bit Windows Assembly (eg, porting TLS code)

winapi assembly x86-64 win64
asked 2009-07-25T00:32:22.883
21
votes
6
answers

How does an OS affect how assembly code runs?

macos assembly x86 x86-64
asked 2009-07-24T01:22:51.460
122
votes
19
answers

System.BadImageFormatException: Could not load file or assembly (from installutil.exe)

.net windows-services x86 64-bit x86-64
asked 2008-11-27T07:39:01.967
379
votes
16
answers

How can I determine if a .NET assembly was built for x86 or x64?

.net assemblies x86 64-bit x86-64
asked 2008-11-06T22:14:03.447
18
votes
3
answers

How to late bind 32bit/64 bit libs at runtime

c# .net 64-bit clr x86-64
asked 2008-08-22T13:23:15.773