Backport upstream fix for Intel PKRU (Walfred Tedeschi).
Backport upstream fix AVX instr. single-stepping (RH BZ 1515209, Pedro Alves). Fix snapgnulib bundle number.
This commit is contained in:
parent
bb1c5356b1
commit
081d76f3ce
@ -74,3 +74,461 @@ Date: Wed Aug 9 05:01:55 2017 -0700
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|| attr->form == DW_FORM_GNU_strp_alt)
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|| attr->form == DW_FORM_GNU_strp_alt)
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str = DW_STRING (attr);
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str = DW_STRING (attr);
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else
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else
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commit f24b864960e61f9a91f8c168c1afe12a6676ad7a
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Author: Walfred Tedeschi <walfred.tedeschi@intel.com>
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Date: Mon Oct 16 08:59:38 2017 +0200
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PR22137: gdbserver crashes on host with pkru register.
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This patch adds missing backslash on a makefile and regenerate the
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files created via the xml files. Those were not in sync with the xml file.
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gdb/ChangeLog:
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2017-10-16 Walfred Tedeschi <walfred.tedeschi@intel.com>
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* features/Makefile (i386-avx-mpx-avx512-pku.dat): Add backslash
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at the end of the line.
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* regformats/i386/amd64-avx-mpx-avx512-pku-linux.dat: Regenerate.
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* regformats/i386/amd64-avx-mpx-avx512-pku.dat: Regenerate.
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### a/gdb/ChangeLog
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### b/gdb/ChangeLog
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## -1,3 +1,10 @@
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+2017-10-16 Walfred Tedeschi <walfred.tedeschi@intel.com>
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+
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+ * features/Makefile (i386-avx-mpx-avx512-pku.dat): Add backslash
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+ at the end of the line.
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+ * regformats/i386/amd64-avx-mpx-avx512-pku-linux.dat: Regenerate.
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+ * regformats/i386/amd64-avx-mpx-avx512-pku.dat: Regenerate.
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+
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2017-09-07 Joel Brobecker <brobecker@adacore.com>
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* version.in: Set GDB version number to 8.0.1.DATE-git.
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--- a/gdb/features/Makefile
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+++ b/gdb/features/Makefile
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@@ -281,7 +281,7 @@ $(outdir)/i386/i386-avx-avx512.dat: i386/32bit-core.xml i386/32bit-avx.xml \
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i386/32bit-avx512.xml
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$(outdir)/i386/i386-avx-avx512-linux.dat: i386/32bit-core.xml i386/32bit-avx.xml \
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i386/32bit-linux.xml i386/32bit-avx512.xml
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-$(outdir)/i386/i386-avx-mpx-avx512-pku.dat: i386/32bit-core.xml
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+$(outdir)/i386/i386-avx-mpx-avx512-pku.dat: i386/32bit-core.xml \
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i386/32bit-avx.xml i386/32bit-mpx.xml i386/32bit-avx512.xml \
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i386/32bit-pkeys.xml
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$(outdir)/i386/i386-avx-mpx-avx512-pku-linux.dat: i386/32bit-core.xml \
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--- a/gdb/regformats/i386/amd64-avx-mpx-avx512-pku-linux.dat
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+++ b/gdb/regformats/i386/amd64-avx-mpx-avx512-pku-linux.dat
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@@ -157,3 +157,4 @@ expedite:rbp,rsp,rip
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256:zmm29h
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256:zmm30h
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256:zmm31h
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+32:pkru
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--- a/gdb/regformats/i386/amd64-avx-mpx-avx512-pku.dat
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+++ b/gdb/regformats/i386/amd64-avx-mpx-avx512-pku.dat
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@@ -60,9 +60,6 @@ expedite:rbp,rsp,rip
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128:xmm14
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128:xmm15
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32:mxcsr
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-64:orig_rax
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-64:fs_base
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-64:gs_base
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128:ymm0h
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128:ymm1h
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128:ymm2h
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commit 50a1fdd59c1777672a9be0e81fe2301c2a115fce
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Author: Pedro Alves <palves@redhat.com>
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Date: Mon Dec 4 15:59:20 2017 +0000
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Fix displaced-stepping RIP-relative VEX-encoded instructions (AVX) (PR gdb/22499)
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PR gdb/22499 is about a latent bug exposed by the switch to "maint set
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target-non-stop on" by default on x86-64 GNU/Linux, a while ago. With
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that on, GDB is also preferring to use displaced-stepping by default.
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The testcase in the bug is failing because GDB ends up incorrectly
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displaced-stepping over a RIP-relative VEX-encoded instruction, like
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this:
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0x00000000004007f5 <+15>: c5 fb 10 05 8b 01 00 00 vmovsd 0x18b(%rip),%xmm0 # 0x400988
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While RIP-relative instructions need adjustment when relocated to the
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scratch pad, GDB ends up just copying VEX-encoded instructions to the
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scratch pad unmodified, with the end result that the inferior ends up
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executing an instruction that fetches/writes memory from the wrong
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address...
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This patch teaches GDB about the VEX-encoding prefixes, fixing the
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problem, and adds a testcase that fails without the GDB fix.
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I think we may need a similar treatment for EVEX-encoded instructions,
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but I didn't address that simply because I couldn't find any
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EVEX-encoded RIP-relative instruction in the gas testsuite. In any
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case, this commit is forward progress as-is already.
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gdb/ChangeLog:
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2017-12-04 Pedro Alves <palves@redhat.com>
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PR gdb/22499
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* amd64-tdep.c (amd64_insn::rex_offset): Rename to...
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(amd64_insn::enc_prefix_offset): ... this, and tweak comment.
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(vex2_prefix_p, vex3_prefix_p): New functions.
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(amd64_get_insn_details): Adjust to rename. Also skip VEX2 and
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VEX3 prefixes.
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(fixup_riprel): Set VEX3.!B.
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gdb/testsuite/ChangeLog:
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2017-12-04 Pedro Alves <palves@redhat.com>
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PR gdb/22499
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* gdb.arch/amd64-disp-step-avx.S: New file.
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* gdb.arch/amd64-disp-step-avx.exp: New file.
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### a/gdb/ChangeLog
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### b/gdb/ChangeLog
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## -1,3 +1,13 @@
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+2017-12-04 Pedro Alves <palves@redhat.com>
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+
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+ PR gdb/22499
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+ * amd64-tdep.c (amd64_insn::rex_offset): Rename to...
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+ (amd64_insn::enc_prefix_offset): ... this, and tweak comment.
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+ (vex2_prefix_p, vex3_prefix_p): New functions.
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+ (amd64_get_insn_details): Adjust to rename. Also skip VEX2 and
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+ VEX3 prefixes.
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+ (fixup_riprel): Set VEX3.!B.
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+
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2017-12-03 Simon Marchi <simon.marchi@ericsson.com>
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* target.h (mem_region_vector): Remove.
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--- a/gdb/amd64-tdep.c
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+++ b/gdb/amd64-tdep.c
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@@ -1037,8 +1037,9 @@ struct amd64_insn
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{
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/* The number of opcode bytes. */
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int opcode_len;
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- /* The offset of the rex prefix or -1 if not present. */
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- int rex_offset;
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+ /* The offset of the REX/VEX instruction encoding prefix or -1 if
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+ not present. */
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+ int enc_prefix_offset;
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/* The offset to the first opcode byte. */
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int opcode_offset;
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/* The offset to the modrm byte or -1 if not present. */
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@@ -1124,6 +1125,22 @@ rex_prefix_p (gdb_byte pfx)
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return REX_PREFIX_P (pfx);
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}
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+/* True if PFX is the start of the 2-byte VEX prefix. */
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+
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+static bool
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+vex2_prefix_p (gdb_byte pfx)
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+{
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+ return pfx == 0xc5;
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+}
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+
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+/* True if PFX is the start of the 3-byte VEX prefix. */
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+
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+static bool
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+vex3_prefix_p (gdb_byte pfx)
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+{
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+ return pfx == 0xc4;
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+}
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+
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/* Skip the legacy instruction prefixes in INSN.
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We assume INSN is properly sentineled so we don't have to worry
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about falling off the end of the buffer. */
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@@ -1242,19 +1259,30 @@ amd64_get_insn_details (gdb_byte *insn, struct amd64_insn *details)
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details->raw_insn = insn;
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details->opcode_len = -1;
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- details->rex_offset = -1;
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+ details->enc_prefix_offset = -1;
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details->opcode_offset = -1;
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details->modrm_offset = -1;
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/* Skip legacy instruction prefixes. */
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insn = amd64_skip_prefixes (insn);
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- /* Skip REX instruction prefix. */
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+ /* Skip REX/VEX instruction encoding prefixes. */
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if (rex_prefix_p (*insn))
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{
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- details->rex_offset = insn - start;
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+ details->enc_prefix_offset = insn - start;
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++insn;
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}
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+ else if (vex2_prefix_p (*insn))
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+ {
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+ /* Don't record the offset in this case because this prefix has
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+ no REX.B equivalent. */
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+ insn += 2;
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+ }
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+ else if (vex3_prefix_p (*insn))
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+ {
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+ details->enc_prefix_offset = insn - start;
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+ insn += 3;
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+ }
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details->opcode_offset = insn - start;
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@@ -1329,10 +1357,22 @@ fixup_riprel (struct gdbarch *gdbarch, amd64_displaced_step_closure *dsc,
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arch_tmp_regno = amd64_get_unused_input_int_reg (insn_details);
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tmp_regno = amd64_arch_reg_to_regnum (arch_tmp_regno);
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- /* REX.B should be unset as we were using rip-relative addressing,
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- but ensure it's unset anyway, tmp_regno is not r8-r15. */
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- if (insn_details->rex_offset != -1)
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- dsc->insn_buf[insn_details->rex_offset] &= ~REX_B;
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+ /* Position of the not-B bit in the 3-byte VEX prefix (in byte 1). */
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+ static constexpr gdb_byte VEX3_NOT_B = 0x20;
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+
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+ /* REX.B should be unset (VEX.!B set) as we were using rip-relative
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+ addressing, but ensure it's unset (set for VEX) anyway, tmp_regno
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+ is not r8-r15. */
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+ if (insn_details->enc_prefix_offset != -1)
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+ {
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+ gdb_byte *pfx = &dsc->insn_buf[insn_details->enc_prefix_offset];
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+ if (rex_prefix_p (pfx[0]))
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+ pfx[0] &= ~REX_B;
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+ else if (vex3_prefix_p (pfx[0]))
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+ pfx[1] |= VEX3_NOT_B;
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+ else
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+ gdb_assert_not_reached ("unhandled prefix");
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+ }
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regcache_cooked_read_unsigned (regs, tmp_regno, &orig_value);
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dsc->tmp_regno = tmp_regno;
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### a/gdb/testsuite/ChangeLog
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### b/gdb/testsuite/ChangeLog
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## -1,3 +1,9 @@
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+2017-12-04 Pedro Alves <palves@redhat.com>
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+
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+ PR gdb/22499
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+ * gdb.arch/amd64-disp-step-avx.S: New file.
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+ * gdb.arch/amd64-disp-step-avx.exp: New file.
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+
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2017-12-03 Pedro Alves <palves@redhat.com>
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* gdb.threads/process-dies-while-detaching.c: Include <errno.h>
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--- /dev/null
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+++ b/gdb/testsuite/gdb.arch/amd64-disp-step-avx.S
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@@ -0,0 +1,70 @@
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+/* Copyright 2009-2017 Free Software Foundation, Inc.
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 3 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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|
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
|
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+ along with this program. If not, see <http://www.gnu.org/licenses/>.
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+
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+ This file is part of the gdb testsuite.
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+
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+ Test displaced stepping over VEX-encoded RIP-relative AVX
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+ instructions. */
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+
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+ .text
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+
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+ .global main
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+main:
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+ nop
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+
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+/***********************************************/
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+
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+/* Test a VEX2-encoded RIP-relative instruction. */
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+
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+ .global test_rip_vex2
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+test_rip_vex2:
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+ vmovsd ro_var(%rip),%xmm0
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+ .global test_rip_vex2
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+test_rip_vex2_end:
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+ nop
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+
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+/* Test a VEX3-encoded RIP-relative instruction. */
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+
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+ .global test_rip_vex3
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+test_rip_vex3:
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+ vextractf128 $0x0,%ymm0,var128(%rip)
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+ .global test_rip_vex3
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+test_rip_vex3_end:
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+ nop
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+
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+ /* skip over test data */
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+ jmp done
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+
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+/* RIP-relative ro-data for VEX2 test above. */
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+
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+ro_var:
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+ .8byte 0x1122334455667788
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+ .8byte 0x8877665544332211
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+
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+/***********************************************/
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+
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+/* All done. */
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+
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+done:
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+ mov $0,%rdi
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+ call exit
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+ hlt
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+
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+/* RIP-relative data for VEX3 test above. */
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+
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+.data
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+var128:
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+ .8byte 0xaa55aa55aa55aa55
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+ .8byte 0x55aa55aa55aa55aa
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--- /dev/null
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+++ b/gdb/testsuite/gdb.arch/amd64-disp-step-avx.exp
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@@ -0,0 +1,141 @@
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+# Copyright 2009-2017 Free Software Foundation, Inc.
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+
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+# This program is free software; you can redistribute it and/or modify
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||||||
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+# it under the terms of the GNU General Public License as published by
|
||||||
|
+# the Free Software Foundation; either version 3 of the License, or
|
||||||
|
+# (at your option) any later version.
|
||||||
|
+#
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||||||
|
+# This program is distributed in the hope that it will be useful,
|
||||||
|
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
+# GNU General Public License for more details.
|
||||||
|
+#
|
||||||
|
+# You should have received a copy of the GNU General Public License
|
||||||
|
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
+
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||||||
|
+# This file is part of the gdb testsuite.
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+
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+# Test displaced stepping over VEX-encoded RIP-relative AVX
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+# instructions.
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|
+
|
||||||
|
+if { ![istarget x86_64-*-* ] || ![is_lp64_target] } {
|
||||||
|
+ verbose "Skipping x86_64 displaced stepping tests."
|
||||||
|
+ return
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+standard_testfile .S
|
||||||
|
+
|
||||||
|
+set additional_flags "-Wa,-g"
|
||||||
|
+
|
||||||
|
+if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile} \
|
||||||
|
+ [list debug $additional_flags]] } {
|
||||||
|
+ return -1
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+# Get things started.
|
||||||
|
+
|
||||||
|
+gdb_test "set displaced-stepping on" ""
|
||||||
|
+gdb_test "show displaced-stepping" ".* displaced stepping .* is on.*"
|
||||||
|
+
|
||||||
|
+if ![runto_main] then {
|
||||||
|
+ fail "can't run to main"
|
||||||
|
+ return 0
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+# GDB picks a spare register from this list to hold the RIP-relative
|
||||||
|
+# address.
|
||||||
|
+set rip_regs { "rax" "rbx" "rcx" "rdx" "rbp" "rsi" "rdi" }
|
||||||
|
+
|
||||||
|
+# Assign VAL to all the RIP_REGS.
|
||||||
|
+
|
||||||
|
+proc set_regs { val } {
|
||||||
|
+ global gdb_prompt
|
||||||
|
+ global rip_regs
|
||||||
|
+
|
||||||
|
+ foreach reg ${rip_regs} {
|
||||||
|
+ gdb_test_no_output "set \$${reg} = ${val}"
|
||||||
|
+ }
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+# Verify all RIP_REGS print as HEX_VAL_RE in hex.
|
||||||
|
+
|
||||||
|
+proc verify_regs { hex_val_re } {
|
||||||
|
+ global rip_regs
|
||||||
|
+
|
||||||
|
+ foreach reg ${rip_regs} {
|
||||||
|
+ gdb_test "p /x \$${reg}" " = ${hex_val_re}" "${reg} expected value"
|
||||||
|
+ }
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+# Set a break at FUNC, which starts with a RIP-relative instruction
|
||||||
|
+# that we want to displaced-step over, and then continue over the
|
||||||
|
+# breakpoint, forcing a displaced-stepping sequence.
|
||||||
|
+
|
||||||
|
+proc disp_step_func { func } {
|
||||||
|
+ global srcfile
|
||||||
|
+
|
||||||
|
+ set test_start_label "${func}"
|
||||||
|
+ set test_end_label "${func}_end"
|
||||||
|
+
|
||||||
|
+ gdb_test "break ${test_start_label}" \
|
||||||
|
+ "Breakpoint.*at.* file .*$srcfile, line.*" \
|
||||||
|
+ "break ${test_start_label}"
|
||||||
|
+ gdb_test "break ${test_end_label}" \
|
||||||
|
+ "Breakpoint.*at.* file .*$srcfile, line.*" \
|
||||||
|
+ "break ${test_end_label}"
|
||||||
|
+
|
||||||
|
+ gdb_test "continue" \
|
||||||
|
+ "Continuing.*Breakpoint.*, ${test_start_label} ().*" \
|
||||||
|
+ "continue to ${test_start_label}"
|
||||||
|
+
|
||||||
|
+ # GDB picks a spare register to hold the RIP-relative address.
|
||||||
|
+ # Ensure the spare register value is restored properly (rax-rdi,
|
||||||
|
+ # sans rsp).
|
||||||
|
+ set value "0xdeadbeefd3adb33f"
|
||||||
|
+ set_regs $value
|
||||||
|
+
|
||||||
|
+ gdb_test "continue" \
|
||||||
|
+ "Continuing.*Breakpoint.*, ${test_end_label} ().*" \
|
||||||
|
+ "continue to ${test_end_label}"
|
||||||
|
+
|
||||||
|
+ verify_regs $value
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+# Test a VEX2-encoded RIP-relative instruction.
|
||||||
|
+with_test_prefix "vex2" {
|
||||||
|
+ # This case writes to the 'xmm0' register. Confirm the register's
|
||||||
|
+ # value is what we believe it is before the AVX instruction runs.
|
||||||
|
+ # Fedora: 0* for missing: https://sourceware.org/bugzilla/show_bug.cgi?id=16225
|
||||||
|
+ gdb_test "p /x \$xmm0.uint128" " = 0x00*" \
|
||||||
|
+ "xmm0 has expected value before"
|
||||||
|
+
|
||||||
|
+ disp_step_func "test_rip_vex2"
|
||||||
|
+
|
||||||
|
+ # Confirm the instruction's expected side effects. It should have
|
||||||
|
+ # modified xmm0.
|
||||||
|
+ # Fedora: 0* for missing: https://sourceware.org/bugzilla/show_bug.cgi?id=16225
|
||||||
|
+ gdb_test "p /x \$xmm0.uint128" " = 0x0*1122334455667788" \
|
||||||
|
+ "xmm0 has expected value after"
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+# Test a VEX3-encoded RIP-relative instruction.
|
||||||
|
+with_test_prefix "vex3" {
|
||||||
|
+ # This case writes to the 'var128' variable. Confirm the
|
||||||
|
+ # variable's value is what we believe it is before the AVX
|
||||||
|
+ # instruction runs.
|
||||||
|
+ gdb_test "p /x (unsigned long long \[2\]) var128" \
|
||||||
|
+ " = \\{0xaa55aa55aa55aa55, 0x55aa55aa55aa55aa\\}" \
|
||||||
|
+ "var128 has expected value before"
|
||||||
|
+
|
||||||
|
+ # Run the AVX instruction.
|
||||||
|
+ disp_step_func "test_rip_vex3"
|
||||||
|
+
|
||||||
|
+ # Confirm the instruction's expected side effects. It should have
|
||||||
|
+ # modifed the 'var128' variable.
|
||||||
|
+ gdb_test "p /x (unsigned long long \[2\]) var128" \
|
||||||
|
+ " = \\{0x1122334455667788, 0x0\\}" \
|
||||||
|
+ "var128 has expected value after"
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+# Done, run program to exit.
|
||||||
|
+gdb_continue_to_end "amd64-disp-step-avx"
|
||||||
|
9
gdb.spec
9
gdb.spec
@ -20,13 +20,13 @@ Name: %{?scl_prefix}gdb
|
|||||||
# Freeze it when GDB gets branched
|
# Freeze it when GDB gets branched
|
||||||
%global snapsrc 20170420
|
%global snapsrc 20170420
|
||||||
# See timestamp of source gnulib installed into gdb/gnulib/ .
|
# See timestamp of source gnulib installed into gdb/gnulib/ .
|
||||||
%global snapgnulib 20150822
|
%global snapgnulib 20161115
|
||||||
%global tarname gdb-%{version}
|
%global tarname gdb-%{version}
|
||||||
Version: 8.0.1
|
Version: 8.0.1
|
||||||
|
|
||||||
# The release always contains a leading reserved number, start it at 1.
|
# The release always contains a leading reserved number, start it at 1.
|
||||||
# `upstream' is not a part of `name' to stay fully rpm dependencies compatible for the testing.
|
# `upstream' is not a part of `name' to stay fully rpm dependencies compatible for the testing.
|
||||||
Release: 31%{?dist}
|
Release: 32%{?dist}
|
||||||
|
|
||||||
License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ and GPLv2+ with exceptions and GPL+ and LGPLv2+ and LGPLv3+ and BSD and Public Domain and GFDL
|
License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ and GPLv2+ with exceptions and GPL+ and LGPLv2+ and LGPLv3+ and BSD and Public Domain and GFDL
|
||||||
Group: Development/Debuggers
|
Group: Development/Debuggers
|
||||||
@ -1731,6 +1731,11 @@ then
|
|||||||
fi
|
fi
|
||||||
|
|
||||||
%changelog
|
%changelog
|
||||||
|
* Tue Dec 5 2017 Jan Kratochvil <jan.kratochvil@redhat.com> - 8.0.1-32.fc26
|
||||||
|
- Backport upstream fix for Intel PKRU (Walfred Tedeschi).
|
||||||
|
- Backport upstream fix AVX instr. single-stepping (RH BZ 1515209, Pedro Alves).
|
||||||
|
- Fix snapgnulib bundle number.
|
||||||
|
|
||||||
* Sat Dec 2 2017 Jan Kratochvil <jan.kratochvil@redhat.com> - 8.0.1-31.fc26
|
* Sat Dec 2 2017 Jan Kratochvil <jan.kratochvil@redhat.com> - 8.0.1-31.fc26
|
||||||
- [testsuite] Fix BuildRequires for non-x86* arches.
|
- [testsuite] Fix BuildRequires for non-x86* arches.
|
||||||
|
|
||||||
|
Loading…
Reference in New Issue
Block a user