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2012-05-23x86-32, relocs: Whitelist more symbols for ld bug workaroundH. Peter Anvin1-0/+11
As noted in checkin: a3e854d95 x86, relocs: Workaround for binutils 2.22.52.0.1 section bug ld version 2.22.52.0.[12] can incorrectly promote relative symbols to absolute, if the output section they appear in is otherwise empty. Since checkin: 6520fe55 x86, realmode: 16-bit real-mode code support for relocs tool we actually check for this and error out rather than silently creating a kernel which will malfunction if relocated. Ingo found a configuration in which __start_builtin_fw triggered the warning. Go through the linker script sources and look for more symbols that could plausibly get bogusly promoted to absolute, and add them to the whitelist. In general, if the following error triggers: Invalid absolute R_386_32 relocation: <symbol> ... then we should verify that <symbol> is really meant to be relocated, and add it and any related symbols manually to the S_REL regexp. Please note that 6520fe55 does not introduce the error, only the check for the error -- without 6520fe55 this version of ld will simply produce a corrupt kernel if CONFIG_RELOCATABLE is set on x86-32. Reported-by: Ingo Molnar <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]> Cc: <[email protected]> v3.4
2012-05-18x86, relocs: When printing an error, say relative or absoluteH. Peter Anvin1-3/+8
When the relocs tool throws an error, let the error message say if it is an absolute or relative symbol. This should make it a lot more clear what action the programmer needs to take and should help us find the reason if additional symbol bugs show up. Signed-off-by: H. Peter Anvin <[email protected]> Cc: <[email protected]>
2012-05-18x86, relocs: Workaround for binutils 2.22.52.0.1 section bugH. Peter Anvin1-1/+5
GNU ld 2.22.52.0.1 has a bug that it blindly changes symbols from section-relative to absolute if they are in a section of zero length. This turns the symbols __init_begin and __init_end into absolute symbols. Let the relocs program know that those should be treated as relative symbols. Reported-by: Ingo Molnar <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]> Cc: H.J. Lu <[email protected]> Cc: <[email protected]> Cc: Jarkko Sakkinen <[email protected]>
2012-05-18x86, realmode: 16-bit real-mode code support for relocs toolH. Peter Anvin3-0/+802
A new option is added to the relocs tool called '--realmode'. This option causes the generation of 16-bit segment relocations and 32-bit linear relocations for the real-mode code. When the real-mode code is moved to the low-memory during kernel initialization, these relocation entries can be used to relocate the code properly. In the assembly code 16-bit segment relocations must be relative to the 'real_mode_seg' absolute symbol. Linear relocations must be relative to a symbol prefixed with 'pa_'. 16-bit segment relocation is used to load cs:ip in 16-bit code. Linear relocations are used in the 32-bit code for relocatable data references. They are declared in the linker script of the real-mode code. The relocs tool is moved to arch/x86/tools/relocs.c, and added new target archscripts that can be used to build scripts needed building an architecture. be compiled before building the arch/x86 tree. [ hpa: accelerating this because it detects invalid absolute relocations, a serious bug in binutils 2.22.52.0.x which currently produces bad kernels. ] Signed-off-by: H. Peter Anvin <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Jarkko Sakkinen <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]> Cc: <[email protected]>
2012-05-18x86, relocs: When printing an error, say relative or absoluteH. Peter Anvin1-3/+8
When the relocs tool throws an error, let the error message say if it is an absolute or relative symbol. This should make it a lot more clear what action the programmer needs to take. Signed-off-by: H. Peter Anvin <[email protected]>
2012-05-18x86, relocs: More relocations which may end up as absoluteH. Peter Anvin1-1/+5
GNU ld 2.22.52.0.1 has a bug that it blindly changes symbols from section-relative to absolute if they are in a section of zero length. This turns the symbols __init_begin and __init_end into absolute symbols. Let the relocs program know that those should be treated as relative symbols. This bug is exposed by checkin 433de739bbc2 x86, realmode: 16-bit real-mode code support for relocs tool only in the sense that that checkin changes the relocs tool to report an error instead of silently generating a kernel which is broken if relocated. Reported-by: Ingo Molnar <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]> Cc: H.J. Lu <[email protected]> Cc: Jarkko Sakkinen <[email protected]>
2012-05-18x86, relocs: Workaround for binutils 2.22.52.0.1 section bugH. Peter Anvin1-1/+1
GNU ld 2.22.52.0.1 has a bug that it blindly changes symbols from section-relative to absolute if they are in a section of zero length. This turns the symbols __init_begin and __init_end into absolute symbols. Let the relocs program know that those should be treated as relative symbols. Reported-by: Ingo Molnar <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]> Cc: H.J. Lu <[email protected]>
2012-05-08x86, realmode: move relocs from scripts/ to arch/x86/toolsJarkko Sakkinen3-0/+809
Moved relocs tool from scripts/ to arch/x86/tools because it is architecture specific script. Added new target archscripts that can be used to build scripts needed building an architecture. Signed-off-by: Jarkko Sakkinen <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: H. Peter Anvin <[email protected]> Cc: Sam Ravnborg <[email protected]> Cc: Michal Marek <[email protected]>
2011-12-05x86/tools: Add decoded instruction dump modeMasami Hiramatsu1-3/+4
Add instruction dump mode to insn_sanity tool for checking decoder really decoded instructions. This mode is enabled when passing double -v (-vv) to insn_sanity. It is useful for who wants to check whether the decoder can decode some instructions correctly. e.g. $ echo 0f 73 10 11 | ./insn_sanity -y -vv -i - Instruction = { .prefixes = { .value = 0, bytes[] = {0, 0, 0, 0}, .got = 1, .nbytes = 0}, .rex_prefix = { .value = 0, bytes[] = {0, 0, 0, 0}, .got = 1, .nbytes = 0}, .vex_prefix = { .value = 0, bytes[] = {0, 0, 0, 0}, .got = 1, .nbytes = 0}, .opcode = { .value = 29455, bytes[] = {f, 73, 0, 0}, .got = 1, .nbytes = 2}, .modrm = { .value = 16, bytes[] = {10, 0, 0, 0}, .got = 1, .nbytes = 1}, .sib = { .value = 0, bytes[] = {0, 0, 0, 0}, .got = 1, .nbytes = 0}, .displacement = { .value = 0, bytes[] = {0, 0, 0, 0}, .got = 1, .nbytes = 0}, .immediate1 = { .value = 17, bytes[] = {11, 0, 0, 0}, .got = 1, .nbytes = 1}, .immediate2 = { .value = 0, bytes[] = {0, 0, 0, 0}, .got = 0, .nbytes = 0}, .attr = 44800, .opnd_bytes = 4, .addr_bytes = 8, .length = 4, .x86_64 = 1, .kaddr = 0x7fff0f7d9430} Success: decoded and checked 1 given instructions with 0 errors (seed:0x0) Signed-off-by: Masami Hiramatsu <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/20111205120603.15475.91192.stgit@cloud Signed-off-by: Ingo Molnar <[email protected]>
2011-12-05x86: Update instruction decoder to support new AVX formatsMasami Hiramatsu1-9/+12
Since new Intel software developers manual introduces new format for AVX instruction set (including AVX2), it is important to update x86-opcode-map.txt to fit those changes. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/20111205120557.15475.13236.stgit@cloud Signed-off-by: Ingo Molnar <[email protected]>
2011-12-05x86/tools: Fix insn_sanity message outputsMasami Hiramatsu1-2/+2
Fix x86 instruction decoder test to dump all error messages to stderr and others to stdout. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/20111205120550.15475.70149.stgit@cloud Signed-off-by: Ingo Molnar <[email protected]>
2011-12-05x86/tools: Fix instruction decoder message outputMasami Hiramatsu1-4/+3
Fix instruction decoder test (insn_sanity), so that it doesn't show both info and error messages twice on same instruction. (In that case, show only error message) Signed-off-by: Masami Hiramatsu <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/20111205120545.15475.7928.stgit@cloud Signed-off-by: Ingo Molnar <[email protected]>
2011-12-05x86/tools: Fix Makefile to build all test toolsMasami Hiramatsu1-2/+1
Fix arch/x86/tools/Makefile to compile both test tools correctly. This bug leads build error. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/20111205120533.15475.62047.stgit@cloud Signed-off-by: Ingo Molnar <[email protected]>
2011-11-10x86, perf: Add a build-time sanity test to the x86 decoderMasami Hiramatsu2-1/+284
Add a sanity test of x86 insn decoder against a stream of randomly generated input, at build time. This test is also able to reproduce any bug that might trigger by allowing the passing of random-seed and iteration-number to the test, or by passing input which has invalid byte code. Changes in V2: - Code cleanup. - Show how to reproduce the error by insn_sanity test. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Andi Kleen <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2010-02-07x86: Remove trailing spaces in messagesFrans Pop1-2/+2
Signed-off-by: Frans Pop <[email protected]> Cc: Avi Kivity <[email protected]> Cc: [email protected] LKML-Reference: <[email protected]> [ Left out the KVM bits. ] Signed-off-by: Ingo Molnar <[email protected]>
2009-12-28Merge branch 'iommu/fixes' of ↵Ingo Molnar1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into x86/urgent
2009-12-18x86: Fix objdump version check in chkobjdump.awk for different formats.Masami Hiramatsu1-3/+13
Different version of objdump says its version in different way; GNU objdump 2.16.1 or GNU objdump version 2.19.51.0.14-1.fc11 20090722 This patch uses the first argument which starts with a number as version string. Changes in v2: - Remove unneeded increment. Signed-off-by: Masami Hiramatsu <[email protected]> LKML-Reference: <[email protected]> Suggested-by: H. Peter Anvin <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Andrew Morton <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]>
2009-12-17x86: Fix objdump version check in arch/x86/tools/chkobjdump.awk[email protected]1-1/+1
It says Warning: objdump version is older than 2.19 Warning: Skipping posttest. because it used the wrong field from `objdump -v': akpm:/usr/src/25> /opt/crosstool/gcc-4.0.2-glibc-2.3.6/x86_64-unknown-linux-gnu/bin/x86_64-unknown-linux-gnu-objdump -v GNU objdump 2.16.1 Copyright 2005 Free Software Foundation, Inc. This program is free software; you may redistribute it under the terms of the GNU General Public License. This program has absolutely no warranty. Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]> Cc: Masami Hiramatsu <[email protected]>
2009-12-17x86: Don't use POSIX character classes in gen-insn-attr-x86.awkRoland Dreier1-6/+4
Not all awk implementations (including the default awk in Ubuntu 9.10) support POSIX character classes. Since x86-opcode-map.txt is plain ASCII, we can just use explicit ranges for lower case, alphabetic, and alphanumeric characters instead. Signed-off-by: Roland Dreier <[email protected]> Acked-by: Masami Hiramatsu <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]>
2009-12-16Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds1-5/+5
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Fix kprobes build with non-gawk awk x86: Split swiotlb initialization into two stages x86: Regex support and known-movable symbols for relocs, fix _end x86, msr: Remove incorrect, duplicated code in the MSR driver x86: Merge kernel_thread() x86: Sync 32/64-bit kernel_thread x86, 32-bit: Use same regs as 64-bit for kernel_thread_helper x86, 64-bit: Use user_mode() to determine new stack pointer in copy_thread() x86, 64-bit: Move kernel_thread to C x86-64, paravirt: Call set_iopl_mask() on 64 bits x86-32: Avoid pipeline serialization in PTREGSCALL1 and 2 x86: Merge sys_clone x86, 32-bit: Convert sys_vm86 & sys_vm86old x86: Merge sys_sigaltstack x86: Merge sys_execve x86: Merge sys_iopl x86-32: Add new pt_regs stubs cpumask: Use modern cpumask style in arch/x86/kernel/cpu/mcheck/mce-inject.c
2009-12-15x86: Fix kprobes build with non-gawk awkJonathan Nieder1-5/+5
The instruction attribute table generator fails when run by mawk or original-awk: $ mawk -f arch/x86/tools/gen-insn-attr-x86.awk \ arch/x86/lib/x86-opcode-map.txt > /dev/null Semantic error at 240: Second IMM error $ echo $? 1 Line 240 contains "c8: ENTER Iw,Ib", which indicates that this instruction has two immediate operands, the second of which is one byte. The script loops through the immediate operands using a for loop. Unfortunately, there is no guarantee in awk that a for (variable in array) loop will return the indices in increasing order. Internally, both original-awk and mawk iterate over a hash table for this purpose, and both implementations happen to produce the index 2 before 1. The supposed second immediate operand is more than one byte wide, producing the error. So loop over the indices in increasing order instead. As a side-effect, with mawk this means the silly two-entry hash table never has to be built. Signed-off-by: Jonathan Nieder <[email protected]> Acked-by Masami Hiramatsu <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Frederic Weisbecker <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-12-06x86, perf probe: Fix warning in test_get_len()Jean Delvare1-1/+1
Fix the following warning: arch/x86/tools/test_get_len.c: In function "main": arch/x86/tools/test_get_len.c:116: warning: unused variable "c" Signed-off-by: Jean Delvare <[email protected]> Cc: Masami Hiramatsu <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-12-03Merge branch 'perf/probes' into perf/coreIngo Molnar2-3/+35
Merge reason: add these fixes to 'perf probe'. Signed-off-by: Ingo Molnar <[email protected]>
2009-11-20x86: insn decoder test checks objdump versionMasami Hiramatsu2-1/+27
Check objdump version before using it for insn decoder build test, because some older objdump can't decode AVX code correctly. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Stephen Rothwell <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: Jim Keniston <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]>
2009-11-20x86: Fix insn decoder test typosMasami Hiramatsu1-3/+9
Fix postest_verbose to posttest_verbose, and add posttest_64bit option for CONFIG_64BIT != y, since old command just passed '-' instead of '-n' when CONFIG_64BIT is not set. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Stephen Rothwell <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: Jim Keniston <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]>
2009-11-19x86: Instruction decoder test should generate build warningMasami Hiramatsu1-6/+11
Since some instructions are not decoded correctly by older versions of objdump, it may cause false positive error in insn decoder posttest. This changes build error of insn decoder test to build warning. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: systemtap <[email protected]> Cc: DLE <[email protected]> Cc: Stephen Rothwell <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Stephen Rothwell <[email protected]> LKML-Reference: <20091116230631.5250.41579.stgit@harusame> Signed-off-by: Ingo Molnar <[email protected]>
2009-11-17x86: Show symbol name if insn decoder test failedMasami Hiramatsu2-1/+14
Show symbol name if insn decoder test find a difference. This will help us to find out where the issue is. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: systemtap <[email protected]> Cc: DLE <[email protected]> Cc: Stephen Rothwell <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Stephen Rothwell <[email protected]> LKML-Reference: <20091116230624.5250.49813.stgit@harusame> Signed-off-by: Ingo Molnar <[email protected]>
2009-11-17x86: Add verbose option to insn decoder testMasami Hiramatsu2-12/+71
Add verbose option to insn decoder test. This dumps decoded instruction when building kernel with V=1. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: systemtap <[email protected]> Cc: DLE <[email protected]> Cc: Stephen Rothwell <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Stephen Rothwell <[email protected]> LKML-Reference: <20091116230618.5250.18762.stgit@harusame> Signed-off-by: Ingo Molnar <[email protected]>
2009-10-29x86: AVX instruction set decoder supportMasami Hiramatsu1-24/+70
Add Intel AVX(Advanced Vector Extensions) instruction set support to x86 instruction decoder. This adds insn.vex_prefix field for storing VEX prefixes, and introduces some original tags for expressing opcodes attributes. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Frank Ch. Eigler <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Jason Baron <[email protected]> Cc: K.Prasad <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Srikar Dronamraju <[email protected]> LKML-Reference: <20091027204226.30545.23451.stgit@harusame> Signed-off-by: Ingo Molnar <[email protected]>
2009-10-29x86: Merge INAT_REXPFX into INAT_PFX_*Masami Hiramatsu1-3/+3
Merge INAT_REXPFX into INAT_PFX_* macro and rename it to INAT_PFX_REX. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Frank Ch. Eigler <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Jason Baron <[email protected]> Cc: K.Prasad <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Srikar Dronamraju <[email protected]> LKML-Reference: <20091027204211.30545.58090.stgit@harusame> Signed-off-by: Ingo Molnar <[email protected]>
2009-10-21x86, instruction decoder: Fix test_get_len build rulesIngo Molnar1-2/+2
Add the kernel source include file as well to the include files search path, to fix this build bug: In file included from arch/x86/tools/test_get_len.c:28: arch/x86/lib/insn.c:21:26: error: linux/string.h: No such file or directory Cc: Masami Hiramatsu <[email protected]> Cc: systemtap<[email protected]> Cc: DLE <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Frederic Weisbecker <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-09-04x86: Remove unused config macros from instruction decoder selftestMasami Hiramatsu1-5/+0
Remove dummy definitions of CONFIG_X86_64 and CONFIG_X86_32 because those macros are not used in the instruction decoder anymore. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Ingo Molnar <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
2009-09-04x86: Allow x86-32 instruction decoder selftest on x86-64Masami Hiramatsu2-8/+8
Pass $(CONFIG_64BIT) to the x86 insn decoder selftest in case we are decoding 32bit code on x86-64, which will happen when building kernel with ARCH=i386 on x86-64. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Ingo Molnar <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
2009-08-27x86: Check awk features before generating inat-tables.cMasami Hiramatsu1-0/+20
Check some awk mandatory features to generate inat-tables.c that old mawk doesn't support. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Jim Keniston <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Avi Kivity <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Frank Ch. Eigler <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jason Baron <[email protected]> Cc: K.Prasad <[email protected]> Cc: Lai Jiangshan <[email protected]> Cc: Li Zefan <[email protected]> Cc: Przemysław Pawełczyk <[email protected]> Cc: Roland McGrath <[email protected]> Cc: Sam Ravnborg <[email protected]> Cc: Srikar Dronamraju <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Tom Zanussi <[email protected]> Cc: Vegard Nossum <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
2009-08-27x86: Fix x86 instruction decoder selftest to check only .textMasami Hiramatsu1-1/+1
Fix x86 instruction decoder selftest to check only .text because other sections (e.g. .notes) will have random bytes which don't need to be checked. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Jim Keniston <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Avi Kivity <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Frank Ch. Eigler <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jason Baron <[email protected]> Cc: K.Prasad <[email protected]> Cc: Lai Jiangshan <[email protected]> Cc: Li Zefan <[email protected]> Cc: Przemysław Pawełczyk <[email protected]> Cc: Roland McGrath <[email protected]> Cc: Sam Ravnborg <[email protected]> Cc: Srikar Dronamraju <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Tom Zanussi <[email protected]> Cc: Vegard Nossum <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
2009-08-27x86: X86 instruction decoder build-time selftestMasami Hiramatsu3-0/+170
Add a user-space selftest of x86 instruction decoder at kernel build time. When CONFIG_X86_DECODER_SELFTEST=y, Kbuild builds a test harness of x86 instruction decoder and performs it after building vmlinux. The test compares the results of objdump and x86 instruction decoder code and check there are no differences. Signed-off-by: Masami Hiramatsu <[email protected]> Signed-off-by: Jim Keniston <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Avi Kivity <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Frank Ch. Eigler <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jason Baron <[email protected]> Cc: K.Prasad <[email protected]> Cc: Lai Jiangshan <[email protected]> Cc: Li Zefan <[email protected]> Cc: Przemysław Pawełczyk <[email protected]> Cc: Roland McGrath <[email protected]> Cc: Sam Ravnborg <[email protected]> Cc: Srikar Dronamraju <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Tom Zanussi <[email protected]> Cc: Vegard Nossum <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
2009-08-27x86: Instruction decoder APIMasami Hiramatsu1-0/+314
Add x86 instruction decoder to arch-specific libraries. This decoder can decode x86 instructions used in kernel into prefix, opcode, modrm, sib, displacement and immediates. This can also show the length of instructions. This version introduces instruction attributes for decoding instructions. The instruction attribute tables are generated from the opcode map file (x86-opcode-map.txt) by the generator script(gen-insn-attr-x86.awk). Currently, the opcode maps are based on opcode maps in Intel(R) 64 and IA-32 Architectures Software Developers Manual Vol.2: Appendix.A, and consist of below two types of opcode tables. 1-byte/2-bytes/3-bytes opcodes, which has 256 elements, are written as below; Table: table-name Referrer: escaped-name opcode: mnemonic|GrpXXX [operand1[,operand2...]] [(extra1)[,(extra2)...] [| 2nd-mnemonic ...] (or) opcode: escape # escaped-name EndTable Group opcodes, which has 8 elements, are written as below; GrpTable: GrpXXX reg: mnemonic [operand1[,operand2...]] [(extra1)[,(extra2)...] [| 2nd-mnemonic ...] EndTable These opcode maps include a few SSE and FP opcodes (for setup), because those opcodes are used in the kernel. Signed-off-by: Masami Hiramatsu <[email protected]> Signed-off-by: Jim Keniston <[email protected]> Acked-by: H. Peter Anvin <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Avi Kivity <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Frank Ch. Eigler <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jason Baron <[email protected]> Cc: K.Prasad <[email protected]> Cc: Lai Jiangshan <[email protected]> Cc: Li Zefan <[email protected]> Cc: Przemysław Pawełczyk <[email protected]> Cc: Roland McGrath <[email protected]> Cc: Sam Ravnborg <[email protected]> Cc: Srikar Dronamraju <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Tom Zanussi <[email protected]> Cc: Vegard Nossum <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
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