[OE-core] [thud][PATCH] gcc: CVE fix <CVE-2019-15847>
Khem Raj
raj.khem at gmail.com
Mon Sep 16 18:47:54 UTC 2019
On Mon, Sep 16, 2019 at 10:53 AM Muminul Islam <misla011 at fiu.edu> wrote:
>
> Signed-off-by: Muminul Islam <muislam at microsoft.com>
> ---
> .../gcc/gcc/CVE-2019-15847.patch | 642 ++++++++++++++++++
> meta/recipes-devtools/gcc/gcc_8.2.bb | 4 +
> 2 files changed, 646 insertions(+)
> create mode 100644 meta/recipes-devtools/gcc/gcc/CVE-2019-15847.patch
>
> diff --git a/meta/recipes-devtools/gcc/gcc/CVE-2019-15847.patch b/meta/recipes-devtools/gcc/gcc/CVE-2019-15847.patch
> new file mode 100644
> index 0000000000..a18d8175a2
> --- /dev/null
> +++ b/meta/recipes-devtools/gcc/gcc/CVE-2019-15847.patch
> @@ -0,0 +1,642 @@
> +From 9fc82916580cba45734bc6325d38a0d29956de95 Mon Sep 17 00:00:00 2001
> +From: segher <segher at 138bc75d-0d04-0410-961f-82ee72b054a4>
> +Date: Thu, 22 Aug 2019 19:36:21 +0000
> +Subject: [PATCH 1/2] rs6000: Use unspec_volatile for darn (PR91481)
> +Reply-To: muislam at microsoft.com
> +
> +Every call to darn should deliver a *new* random number; such calls
> +should not be CSEd together. So they should be unspec_volatile, not
> +plain unspec.
> +
> + PR target/91481
> + * config/rs6000/rs6000.md (unspec): Delete UNSPEC_DARN, UNSPEC_DARN_32,
> + and UNSPEC_DARN_RAW.
> + (unspecv): New enumerator values UNSPECV_DARN, UNSPECV_DARN_32, and
> + UNSPECV_DARN_RAW.
> + (darn_32): Use an unspec_volatile, and UNSPECV_DARN_32.
> + (darn_raw): Use an unspec_volatile, and UNSPECV_DARN_RAW.
> + (darn): Use an unspec_volatile, and UNSPECV_DARN.
> +
> +git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@274835 138bc75d-0d04-0410-961f-82ee72b054a4
> +Signed-off-by: Muminul Islam <muislam at microsoft.com>
> +
> +CVE: CVE-2019-15847
> +Upstream-Status: Backport
> +---
> + gcc/ChangeLog | 337 +++++++++++++++++++++++++++++++++++-
> + gcc/config/rs6000/rs6000.md | 170 ++++++++++++++++++
> + 2 files changed, 506 insertions(+), 1 deletion(-)
> +
> +diff --git a/gcc/ChangeLog b/gcc/ChangeLog
> +index b93dae5dfb0..f3de9bb65e3 100644
> +--- a/gcc/ChangeLog
> ++++ b/gcc/ChangeLog
> +@@ -1,4 +1,339 @@
> +-2018-07-26 Release Manager
> ++2019-08-22 Segher Boessenkool <segher at kernel.crashing.org>
> ++
> ++ PR target/91481
> ++ * config/rs6000/rs6000.md (unspec): Delete UNSPEC_DARN, UNSPEC_DARN_32,
> ++ and UNSPEC_DARN_RAW.
> ++ (unspecv): New enumerator values UNSPECV_DARN, UNSPECV_DARN_32, and
> ++ UNSPECV_DARN_RAW.
> ++ (darn_32): Use an unspec_volatile, and UNSPECV_DARN_32.
> ++ (darn_raw): Use an unspec_volatile, and UNSPECV_DARN_RAW.
> ++ (darn): Use an unspec_volatile, and UNSPECV_DARN.
> ++
> ++2019-08-22 Segher Boessenkool <segher at kernel.crashing.org>
> ++
> ++ * config/rs6000/altivec.md (unspec): Delete UNSPEC_DARN, UNSPEC_DARN_32,
> ++ UNSPEC_DARN_RAW, UNSPEC_CMPRB, UNSPEC_CMPRB2, UNSPEC_CMPEQB; move to...
> ++ * config/rs6000/rs6000.md (unspec): ... here.
> ++ * config/rs6000/altivec.md (darn_32, darn_raw, darn, cmprb,
> ++ *cmprb_internal, setb_signed, setb_unsigned, cmprb2, *cmprb2_internal,
> ++ cmpeqb, *cmpeqb_internal): Delete, move to...
> ++ * config/rs6000/rs6000.md (darn_32, darn_raw, darn, cmprb,
> ++ *cmprb_internal, setb_signed, setb_unsigned, cmprb2, *cmprb2_internal,
> ++ cmpeqb, *cmpeqb_internal): ... here.
> ++
> ++2019-08-22 Kyrylo Tkachov <kyrylo.tkachov at arm.com>
> ++
> ++ * config/arm/arm_acle.h: Use arch=armv8-a+crc+simd pragma for CRC32
> ++ intrinsics if __ARM_FP.
> ++ Use __ARM_FEATURE_CRC32 ifdef guard.
> ++
> ++2019-08-22 Wilco Dijkstra <wdijkstr at arm.com>
> ++
> ++ * config/arm/arm.md (neon_for_64bits): Remove.
> ++ (avoid_neon_for_64bits): Remove.
> ++ (arm_adddi3): Always split early.
> ++ (arm_subdi3): Always split early.
> ++ (negdi2): Remove Neon expansion.
> ++ (split zero_extend): Split before reload.
> ++ (split sign_extend): Split before reload.
> ++
> ++2019-08-22 Wilco Dijkstra <wdijkstr at arm.com>
> ++
> ++ * config/arm/iterators.md (qhs_extenddi_cstr): Update.
> ++ (qhs_extenddi_cstr): Likewise.
> ++ * config/arm/arm.md (ashldi3): Always expand early.
> ++ (ashlsi3): Likewise.
> ++ (ashrsi3): Likewise.
> ++ (zero_extend<mode>di2): Remove Neon variants.
> ++ (extend<mode>di2): Likewise.
> ++ * config/arm/neon.md (ashldi3_neon_noclobber): Remove.
> ++ (signed_shift_di3_neon): Likewise.
> ++ (unsigned_shift_di3_neon): Likewise.
> ++ (ashrdi3_neon_imm_noclobber): Likewise.
> ++ (lshrdi3_neon_imm_noclobber): Likewise.
> ++ (<shift>di3_neon): Likewise.
> ++ (split extend): Remove DI extend split patterns.
> ++
> ++2019-08-22 Wilco Dijkstra <wdijkstr at arm.com>
> ++
> ++ * config/arm/arm.md (split and/eor/ior): Remove Neon check.
> ++ (split not): Add DImode not splitter.
> ++ (anddi3): Remove pattern.
> ++ (anddi3_insn): Likewise.
> ++ (anddi_zesidi_di): Likewise.
> ++ (anddi_sesdi_di): Likewise.
> ++ (anddi_notdi_di): Likewise.
> ++ (anddi_notzesidi_di): Likewise.
> ++ (anddi_notsesidi_di): Likewise.
> ++ (iordi3): Likewise.
> ++ (iordi3_insn): Likewise.
> ++ (iordi_zesidi_di): Likewise.
> ++ (iordi_sesidi_di): Likewise.
> ++ (xordi3): Likewise.
> ++ (xordi3_insn): Likewise.
> ++ (xordi_sesidi_di): Likewise.
> ++ (xordi_zesidi_di): Likewise.
> ++ (one_cmpldi2): Likewise.
> ++ (one_cmpldi2_insn): Likewise.
> ++ * config/arm/constraints.md: Remove De, Df, Dg constraints.
> ++ * config/arm/iwmmxt.md (iwmmxt_iordi3): Remove general register
> ++ alternative.
> ++ (iwmmxt_xordi3): Likewise.
> ++ (iwmmxt_anddi3): Likewise.
> ++ * config/arm/neon.md (orndi3_neon): Remove pattern.
> ++ (anddi_notdi_di): Likewise.
> ++ * config/arm/predicates.md (arm_anddi_operand_neon): Remove.
> ++ (arm_iordi_operand_neon): Likewise.
> ++ (arm_xordi_operand_neon): Likewise.
> ++ * config/arm/thumb2.md(iordi_notdi_di): Remove pattern.
> ++ (iordi_notzesidi_di): Likewise.
> ++ (iordi_notdi_zesidi): Likewise.
> ++ (iordi_notsesidi_di): Likewise.
> ++
> ++2019-08-22 Richard Earnshaw <rearnsha at arm.com>
> ++
> ++ * config/arm/arm.md (iorsi3_compare0): Add alternative for 16-bit thumb
> ++ insn.
> ++ (iorsi3_compare0_scratch): Likewise.
> ++
> ++2019-08-22 Sylvia Taylor <sylvia.taylor at arm.com>
> ++
> ++ * config/aarch64/aarch64-simd-builtins.def:
> ++ (ld1x4): New.
> ++ (st1x4): Likewise.
> ++ * config/aarch64/aarch64-simd.md:
> ++ (aarch64_ld1x4<VALLDIF:mode>): New pattern.
> ++ (aarch64_st1x4<VALLDIF:mode>): Likewise.
> ++ (aarch64_ld1_x4_<mode>): Likewise.
> ++ (aarch64_st1_x4_<mode>): Likewise.
> ++ * config/aarch64/arm_neon.h:
> ++ (vld1_s8_x4): New function.
> ++ (vld1q_s8_x4): Likewise.
> ++ (vld1_s16_x4): Likewise.
> ++ (vld1q_s16_x4): Likewise.
> ++ (vld1_s32_x4): Likewise.
> ++ (vld1q_s32_x4): Likewise.
> ++ (vld1_u8_x4): Likewise.
> ++ (vld1q_u8_x4): Likewise.
> ++ (vld1_u16_x4): Likewise.
> ++ (vld1q_u16_x4): Likewise.
> ++ (vld1_u32_x4): Likewise.
> ++ (vld1q_u32_x4): Likewise.
> ++ (vld1_f16_x4): Likewise.
> ++ (vld1q_f16_x4): Likewise.
> ++ (vld1_f32_x4): Likewise.
> ++ (vld1q_f32_x4): Likewise.
> ++ (vld1_p8_x4): Likewise.
> ++ (vld1q_p8_x4): Likewise.
> ++ (vld1_p16_x4): Likewise.
> ++ (vld1q_p16_x4): Likewise.
> ++ (vld1_s64_x4): Likewise.
> ++ (vld1_u64_x4): Likewise.
> ++ (vld1_p64_x4): Likewise.
> ++ (vld1q_s64_x4): Likewise.
> ++ (vld1q_u64_x4): Likewise.
> ++ (vld1q_p64_x4): Likewise.
> ++ (vld1_f64_x4): Likewise.
> ++ (vld1q_f64_x4): Likewise.
> ++ (vst1_s8_x4): Likewise.
> ++ (vst1q_s8_x4): Likewise.
> ++ (vst1_s16_x4): Likewise.
> ++ (vst1q_s16_x4): Likewise.
> ++ (vst1_s32_x4): Likewise.
> ++ (vst1q_s32_x4): Likewise.
> ++ (vst1_u8_x4): Likewise.
> ++ (vst1q_u8_x4): Likewise.
> ++ (vst1_u16_x4): Likewise.
> ++ (vst1q_u16_x4): Likewise.
> ++ (vst1_u32_x4): Likewise.
> ++ (vst1q_u32_x4): Likewise.
> ++ (vst1_f16_x4): Likewise.
> ++ (vst1q_f16_x4): Likewise.
> ++ (vst1_f32_x4): Likewise.
> ++ (vst1q_f32_x4): Likewise.
> ++ (vst1_p8_x4): Likewise.
> ++ (vst1q_p8_x4): Likewise.
> ++ (vst1_p16_x4): Likewise.
> ++ (vst1q_p16_x4): Likewise.
> ++ (vst1_s64_x4): Likewise.
> ++ (vst1_u64_x4): Likewise.
> ++ (vst1_p64_x4): Likewise.
> ++ (vst1q_s64_x4): Likewise.
> ++ (vst1q_u64_x4): Likewise.
> ++ (vst1q_p64_x4): Likewise.
> ++ (vst1_f64_x4): Likewise.
> ++ (vst1q_f64_x4): Likewise.
> ++
> ++2019-08-22 Prathamesh Kulkarni <prathamesh.kulkarni at linaro.org>
> ++
> ++ * config/aarch64/aarch64-sve.md (vcond_mask): Add "@".
> ++
> ++2019-08-22 Prathamesh Kulkarni <prathamesh.kulkarni at linaro.org>
> ++ Richard Sandiford <richard.sandiford at arm.com>
> ++
> ++ PR target/88839
> ++ * config/aarch64/aarch64.c (aarch64_evpc_sel): New function.
> ++ (aarch64_expand_vec_perm_const_1): Call aarch64_evpc_sel.
> ++
> ++2019-08-21 Prathamesh Kulkarni <prathamesh.kulkarni at linaro.org>
> ++
> ++ PR target/90724
> ++ * config/aarch64/aarch64.c (aarch64_gen_compare_reg_maybe_ze): Force y
> ++ in reg if it fails aarch64_plus_operand predicate.
> ++
> ++2019-08-21 Richard Biener <rguenther at suse.de>
> ++
> ++ PR tree-optimization/91482
> ++ * tree-ssa-ccp.c (ccp_folder::fold_stmt): Remove useless
> ++ BUILT_IN_ASSUME_ALIGNED calls.
> ++
> ++2019-08-21 Richard Biener <rguenther at suse.de>
> ++
> ++ PR target/91498
> ++ PR target/91503
> ++ * config/i386/i386-features.c
> ++ (general_scalar_chain::make_vector_copies): Copy stack temporary
> ++ rtx when using it multiple times.
> ++ (general_scalar_chain::convert_reg): Likewise.
> ++
> ++2019-08-20 Bernd Edlinger <bernd.edlinger at hotmail.de>
> ++
> ++ * function.c (assign_parm_find_stack_rtl): Use known_eq instead of ==.
> ++
> ++2019-08-20 Matthew Beliveau <mbelivea at redhat.com>
> ++
> ++ * tree-ssa-dse.c (dse_optimize_redundant_stores): Improved check to
> ++ catch more redundant zero initialization cases.
> ++ (dse_dom_walker::dse_optimize_stmt): Likewise.
> ++
> ++2019-08-20 Richard Biener <rguenther at suse.de>
> ++
> ++ PR lto/91307
> ++ * ipa.c (cgraph_build_static_cdtor_1): Use names not recognizable
> ++ by collect2 when targetm.have_ctors_dtors which avoids dragging
> ++ in temporary filenames from LTO input objects.
> ++
> ++2019-08-20 Richard Biener <rguenther at suse.de>
> ++
> ++ PR tree-optimization/37242
> ++ * tree-ssa-sccvn.c (visit_nary_op): Also CSE (T)(a + b)
> ++ to (T)a + (T)b if we know that a + b does not overflow.
> ++
> ++2019-08-20 Eric Botcazou <ebotcazou at adacore.com>
> ++
> ++ PR rtl-optimization/91347
> ++ * dse.c (scan_insn): Call add_wild_read for non-const/memset tail calls
> ++ before reload if HARD_FRAME_POINTER_IS_ARG_POINTER.
> ++
> ++2019-08-20 Richard Sandiford <richard.sandiford at arm.com>
> ++
> ++ * calls.h (function_arg_info): Add a pass_by_reference field,
> ++ defaulting to false.
> ++ * calls.c (apply_pass_by_reference_rules): Set pass_by_reference
> ++ when applying pass-by-reference semantics.
> ++ (initialize_argument_information): Likewise.
> ++ (emit_library_call_value_1): Likewise.
> ++ * function.c (assign_parm_data_one): Remove passed_pointer field.
> ++ (assign_parm_find_data_types): Don't set it.
> ++ (assign_parm_find_stack_rtl, assign_parm_adjust_stack_rtl)
> ++ (assign_parm_setup_reg, assign_parms, gimplify_parameters): Use
> ++ arg.pass_by_reference instead of passed_pointer.
> ++
> ++2019-08-20 Richard Sandiford <richard.sandiford at arm.com>
> ++
> ++ * calls.c (emit_library_call_value_1): Merge arg and orig_arg
> ++ into a single function_arg_info, updating its fields when we
> ++ apply pass-by-reference and promotion semantics. Use the
> ++ function_arg_info to track the mode rather than keeping it in
> ++ a separate local variable.
> ++ (initialize_argument_information): Likewise. Base the final
> ++ arg_to_skip on this new function_arg_info rather than creating
> ++ a new one from scratch.
> ++
> ++2019-08-20 Richard Sandiford <richard.sandiford at arm.com>
> ++
> ++ * function.c (assign_parm_data_one): Replace passed_type,
> ++ promoted_mode and named_arg with a function_arg_info field.
> ++ (assign_parm_find_data_types): Remove local variables and
> ++ assign directly to "data". Make data->passed_mode shadow
> ++ data->arg.mode until promotion, then assign the promoted
> ++ mode to data->arg.mode.
> ++ (assign_parms_setup_varargs, assign_parm_find_entry_rtl)
> ++ (assign_parm_find_stack_rtl, assign_parm_adjust_entry_rtl)
> ++ (assign_parm_remove_parallels, assign_parm_setup_block_p)
> ++ (assign_parm_setup_block, assign_parm_setup_reg)
> ++ (assign_parm_setup_stack, assign_parms, gimplify_parameters): Use
> ++ arg.mode instead of promoted_mode, arg.type instead of passed_type
> ++ and arg.named instead of named_arg. Use data->arg for
> ++ function_arg_info structures that had the field values passed_type,
> ++ promoted_mode and named_arg. Base other function_arg_infos on
> ++ data->arg, changing the necessary properties.
> ++
> ++2019-08-20 Richard Sandiford <richard.sandiford at arm.com>
> ++
> ++ * calls.h (apply_pass_by_reference_rules): Declare.
> ++ * calls.c (apply_pass_by_reference_rules): New function.
> ++ * config/c6x/c6x.c (c6x_call_saved_register_used): Use it.
> ++ * config/rs6000/rs6000-call.c (rs6000_parm_needs_stack): Likewise.
> ++ * config/s390/s390.c (s390_call_saved_register_used): Likewise.
> ++ * function.c (assign_parm_find_data_types): Likewise.
> ++ * var-tracking.c (prepare_call_arguments): Likewise.
> ++
> ++2019-08-20 Richard Sandiford <richard.sandiford at arm.com>
> ++
> ++ * target.def (must_pass_in_stack): Take a function_arg_info instead
> ++ of a mode and a type.
> ++ * doc/tm.texi: Regenerate.
> ++ * calls.h (must_pass_in_stack_var_size): Take a function_arg_info
> ++ instead of a mode and a type.
> ++ (must_pass_in_stack_var_size_or_pad): Likewise.
> ++ * calls.c (must_pass_in_stack_var_size): Likewise.
> ++ (must_pass_in_stack_var_size_or_pad): Likewise.
> ++ (initialize_argument_information): Update call to
> ++ targetm.calls.must_pass_in_stack.
> ++ (must_pass_va_arg_on_stack): Likewise.
> ++ * function.c (assign_parm_find_entry_rtl): Likewise.
> ++ * targhooks.c (hook_pass_by_reference_must_pass_in_stack): Likewise.
> ++ * config/alpha/alpha.c (alpha_function_arg): Likewise.
> ++ (alpha_function_arg_advance): Likewise.
> ++ * config/cr16/cr16.c (cr16_function_arg): Likewise.
> ++ (cr16_function_arg_advance): Likewise.
> ++ * config/cris/cris.c (cris_pass_by_reference): Likewise.
> ++ (cris_arg_partial_bytes): Likewise.
> ++ * config/iq2000/iq2000.c (iq2000_pass_by_reference): Likewise.
> ++ * config/lm32/lm32.c (lm32_function_arg): Likewise.
> ++ * config/mcore/mcore.c (mcore_num_arg_regs): Likewise.
> ++ (mcore_function_arg, mcore_arg_partial_bytes): Likewise.
> ++ * config/mips/mips.c (mips_pass_by_reference): Likewise.
> ++ * config/mmix/mmix.c (mmix_function_arg_advance): Likewise.
> ++ (mmix_function_arg_1, mmix_pass_by_reference): Likewise.
> ++ * config/sh/sh.c (sh_pass_by_reference): Likewise.
> ++ * config/stormy16/stormy16.c (xstormy16_function_arg): Likewise.
> ++ * config/xtensa/xtensa.c (xtensa_function_arg_advance): Likewise.
> ++ * config/arm/arm.c (arm_must_pass_in_stack): Take a function_arg_info
> ++ instead of a mode and a type.
> ++ * config/fr30/fr30.c (fr30_must_pass_in_stack): Likewise.
> ++ (fr30_num_arg_regs): Likewise.
> ++ (fr30_setup_incoming_varargs): Update calls accordingly.
> ++ (fr30_arg_partial_bytes, fr30_function_arg): Likewise.
> ++ (fr30_function_arg_advance): Likewise.
> ++ * config/frv/frv.c (frv_must_pass_in_stack): Take a function_arg_info
> ++ instead of a mode and a type.
> ++ * config/gcn/gcn.c (num_arg_regs): Likewise.
> ++ (gcn_function_arg, gcn_function_arg_advance): Update calls to
> ++ num_arg_regs and targetm.calls.must_pass_in_stack.
> ++ (gcn_arg_partial_bytes): Likewise.
> ++ * config/i386/i386.c (ix86_must_pass_in_stack): Take a
> ++ function_arg_info instead of a mode and a type.
> ++ (classify_argument): Update call accordingly.
> ++ * config/nds32/nds32.c (nds32_must_pass_in_stack): Take a
> ++ function_arg_info instead of a mode and a type.
> ++ * config/rs6000/rs6000-internal.h (rs6000_must_pass_in_stack):
> ++ Likewise.
> ++ * config/rs6000/rs6000-call.c (rs6000_must_pass_in_stack): Likewise.
> ++ (rs6000_parm_needs_stack): Update call accordingly.
> ++ (setup_incoming_varargs): Likewise.
> ++>>>>>>> 0708e6fa34a... rs6000: Use unspec_volatile for darn (PR91481)
this is some conflict leftover, it seems
> +
> + * GCC 8.2.0 released.
> +
> +diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
> +index 60058814b8a..5d783e6c669 100644
> +--- a/gcc/config/rs6000/rs6000.md
> ++++ b/gcc/config/rs6000/rs6000.md
> +@@ -138,6 +138,9 @@
> + UNSPEC_STACK_CHECK
> + UNSPEC_FUSION_P9
> + UNSPEC_FUSION_ADDIS
> ++ UNSPEC_CMPRB
> ++ UNSPEC_CMPRB2
> ++ UNSPEC_CMPEQB
> + UNSPEC_ADD_ROUND_TO_ODD
> + UNSPEC_SUB_ROUND_TO_ODD
> + UNSPEC_MUL_ROUND_TO_ODD
> +@@ -162,6 +165,9 @@
> + UNSPECV_EH_RR ; eh_reg_restore
> + UNSPECV_ISYNC ; isync instruction
> + UNSPECV_MFTB ; move from time base
> ++ UNSPECV_DARN ; darn 1 (deliver a random number)
> ++ UNSPECV_DARN_32 ; darn 2
> ++ UNSPECV_DARN_RAW ; darn 0
> + UNSPECV_NLGR ; non-local goto receiver
> + UNSPECV_MFFS ; Move from FPSCR
> + UNSPECV_MTFSF ; Move to FPSCR Fields
> +@@ -14603,6 +14609,170 @@
> + [(set_attr "type" "veccmp")
> + (set_attr "size" "128")])
> +
> ++;; Miscellaneous ISA 3.0 (power9) instructions
> ++
> ++(define_insn "darn_32"
> ++ [(set (match_operand:SI 0 "register_operand" "=r")
> ++ (unspec_volatile:SI [(const_int 0)] UNSPECV_DARN_32))]
> ++ "TARGET_P9_MISC"
> ++ "darn %0,0"
> ++ [(set_attr "type" "integer")])
> ++
> ++(define_insn "darn_raw"
> ++ [(set (match_operand:DI 0 "register_operand" "=r")
> ++ (unspec_volatile:DI [(const_int 0)] UNSPECV_DARN_RAW))]
> ++ "TARGET_P9_MISC && TARGET_64BIT"
> ++ "darn %0,2"
> ++ [(set_attr "type" "integer")])
> ++
> ++(define_insn "darn"
> ++ [(set (match_operand:DI 0 "register_operand" "=r")
> ++ (unspec_volatile:DI [(const_int 0)] UNSPECV_DARN))]
> ++ "TARGET_P9_MISC && TARGET_64BIT"
> ++ "darn %0,1"
> ++ [(set_attr "type" "integer")])
> ++
> ++;; Test byte within range.
> ++;;
> ++;; The bytes of operand 1 are organized as xx:xx:xx:vv, where xx
> ++;; represents a byte whose value is ignored in this context and
> ++;; vv, the least significant byte, holds the byte value that is to
> ++;; be tested for membership within the range specified by operand 2.
> ++;; The bytes of operand 2 are organized as xx:xx:hi:lo.
> ++;;
> ++;; Return in target register operand 0 a value of 1 if lo <= vv and
> ++;; vv <= hi. Otherwise, set register operand 0 to 0.
> ++;;
> ++;; Though the instructions to which this expansion maps operate on
> ++;; 64-bit registers, the current implementation only operates on
> ++;; SI-mode operands as the high-order bits provide no information
> ++;; that is not already available in the low-order bits. To avoid the
> ++;; costs of data widening operations, future enhancements might allow
> ++;; DI mode for operand 0 and/or might allow operand 1 to be QI mode.
> ++(define_expand "cmprb"
> ++ [(set (match_dup 3)
> ++ (unspec:CC [(match_operand:SI 1 "gpc_reg_operand" "r")
> ++ (match_operand:SI 2 "gpc_reg_operand" "r")]
> ++ UNSPEC_CMPRB))
> ++ (set (match_operand:SI 0 "gpc_reg_operand" "=r")
> ++ (if_then_else:SI (lt (match_dup 3)
> ++ (const_int 0))
> ++ (const_int -1)
> ++ (if_then_else (gt (match_dup 3)
> ++ (const_int 0))
> ++ (const_int 1)
> ++ (const_int 0))))]
> ++ "TARGET_P9_MISC"
> ++{
> ++ operands[3] = gen_reg_rtx (CCmode);
> ++})
> ++
> ++;; The bytes of operand 1 are organized as xx:xx:xx:vv, where xx
> ++;; represents a byte whose value is ignored in this context and
> ++;; vv, the least significant byte, holds the byte value that is to
> ++;; be tested for membership within the range specified by operand 2.
> ++;; The bytes of operand 2 are organized as xx:xx:hi:lo.
> ++;;
> ++;; Set bit 1 (the GT bit, 0x4) of CR register operand 0 to 1 if
> ++;; lo <= vv and vv <= hi. Otherwise, set the GT bit to 0. The other
> ++;; 3 bits of the target CR register are all set to 0.
> ++(define_insn "*cmprb_internal"
> ++ [(set (match_operand:CC 0 "cc_reg_operand" "=y")
> ++ (unspec:CC [(match_operand:SI 1 "gpc_reg_operand" "r")
> ++ (match_operand:SI 2 "gpc_reg_operand" "r")]
> ++ UNSPEC_CMPRB))]
> ++ "TARGET_P9_MISC"
> ++ "cmprb %0,0,%1,%2"
> ++ [(set_attr "type" "logical")])
> ++
> ++;; Set operand 0 register to -1 if the LT bit (0x8) of condition
> ++;; register operand 1 is on. Otherwise, set operand 0 register to 1
> ++;; if the GT bit (0x4) of condition register operand 1 is on.
> ++;; Otherwise, set operand 0 to 0. Note that the result stored into
> ++;; register operand 0 is non-zero iff either the LT or GT bits are on
> ++;; within condition register operand 1.
> ++(define_insn "setb_signed"
> ++ [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
> ++ (if_then_else:SI (lt (match_operand:CC 1 "cc_reg_operand" "y")
> ++ (const_int 0))
> ++ (const_int -1)
> ++ (if_then_else (gt (match_dup 1)
> ++ (const_int 0))
> ++ (const_int 1)
> ++ (const_int 0))))]
> ++ "TARGET_P9_MISC"
> ++ "setb %0,%1"
> ++ [(set_attr "type" "logical")])
> ++
> ++(define_insn "setb_unsigned"
> ++ [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
> ++ (if_then_else:SI (ltu (match_operand:CCUNS 1 "cc_reg_operand" "y")
> ++ (const_int 0))
> ++ (const_int -1)
> ++ (if_then_else (gtu (match_dup 1)
> ++ (const_int 0))
> ++ (const_int 1)
> ++ (const_int 0))))]
> ++ "TARGET_P9_MISC"
> ++ "setb %0,%1"
> ++ [(set_attr "type" "logical")])
> ++
> ++;; Test byte within two ranges.
> ++;;
> ++;; The bytes of operand 1 are organized as xx:xx:xx:vv, where xx
> ++;; represents a byte whose value is ignored in this context and
> ++;; vv, the least significant byte, holds the byte value that is to
> ++;; be tested for membership within the range specified by operand 2.
> ++;; The bytes of operand 2 are organized as hi_1:lo_1:hi_2:lo_2.
> ++;;
> ++;; Return in target register operand 0 a value of 1 if (lo_1 <= vv and
> ++;; vv <= hi_1) or if (lo_2 <= vv and vv <= hi_2). Otherwise, set register
> ++;; operand 0 to 0.
> ++;;
> ++;; Though the instructions to which this expansion maps operate on
> ++;; 64-bit registers, the current implementation only operates on
> ++;; SI-mode operands as the high-order bits provide no information
> ++;; that is not already available in the low-order bits. To avoid the
> ++;; costs of data widening operations, future enhancements might allow
> ++;; DI mode for operand 0 and/or might allow operand 1 to be QI mode.
> ++(define_expand "cmprb2"
> ++ [(set (match_dup 3)
> ++ (unspec:CC [(match_operand:SI 1 "gpc_reg_operand" "r")
> ++ (match_operand:SI 2 "gpc_reg_operand" "r")]
> ++ UNSPEC_CMPRB2))
> ++ (set (match_operand:SI 0 "gpc_reg_operand" "=r")
> ++ (if_then_else:SI (lt (match_dup 3)
> ++ (const_int 0))
> ++ (const_int -1)
> ++ (if_then_else (gt (match_dup 3)
> ++ (const_int 0))
> ++ (const_int 1)
> ++ (const_int 0))))]
> ++ "TARGET_P9_MISC"
> ++{
> ++ operands[3] = gen_reg_rtx (CCmode);
> ++})
> ++
> ++;; The bytes of operand 1 are organized as xx:xx:xx:vv, where xx
> ++;; represents a byte whose value is ignored in this context and
> ++;; vv, the least significant byte, holds the byte value that is to
> ++;; be tested for membership within the ranges specified by operand 2.
> ++;; The bytes of operand 2 are organized as hi_1:lo_1:hi_2:lo_2.
> ++;;
> ++;; Set bit 1 (the GT bit, 0x4) of CR register operand 0 to 1 if
> ++;; (lo_1 <= vv and vv <= hi_1) or if (lo_2 <= vv and vv <= hi_2).
> ++;; Otherwise, set the GT bit to 0. The other 3 bits of the target
> ++;; CR register are all set to 0.
> ++(define_insn "*cmprb2_internal"
> ++ [(set (match_operand:CC 0 "cc_reg_operand" "=y")
> ++ (unspec:CC [(match_operand:SI 1 "gpc_reg_operand" "r")
> ++ (match_operand:SI 2 "gpc_reg_operand" "r")]
> ++ UNSPEC_CMPRB2))]
> ++ "TARGET_P9_MISC"
> ++ "cmprb %0,1,%1,%2"
> ++ [(set_attr "type" "logical")])
> ++>>>>>>> 0708e6fa34a... rs6000: Use unspec_volatile for darn (PR91481)
> ++
> +
> +
> + (include "sync.md")
> +--
> +2.23.0
> +
> +
> +From 4f16ac67f7974fd118d084de8ffd829864c213c4 Mon Sep 17 00:00:00 2001
> +From: segher <segher at 138bc75d-0d04-0410-961f-82ee72b054a4>
> +Date: Fri, 23 Aug 2019 22:19:40 +0000
> +Subject: [PATCH 2/2] rs6000: New darn testcase (PR91481)
> +Reply-To: muislam at microsoft.com
> +
> +We used to implement darn with unspecs, not unspec_volatiles, which
> +means two darn instructions could be CSEd together.
> +
> +This testcase tests it by adding together four random numbers. If all
> +is well that means we get four darn instructions, because such a small
> +loop is unrolled fine at -O2 already. If things go bad, combine will
> +combine it all to one darn and a shift left by two.
> +
> +gcc/testsuite/
> + PR target/91481
> + * gcc.target/powerpc/darn-3.c: New testcase.
> +
> +git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@274889 138bc75d-0d04-0410-961f-82ee72b054a4
> +Signed-off-by: Muminul Islam <muislam at microsoft.com>
> +
> +CVE: CVE-2019-15847
> +Upstream-Status: Backport
> +---
> + gcc/testsuite/ChangeLog | 7 ++++++-
> + gcc/testsuite/gcc.target/powerpc/darn-3.c | 16 ++++++++++++++++
> + 2 files changed, 22 insertions(+), 1 deletion(-)
> + create mode 100644 gcc/testsuite/gcc.target/powerpc/darn-3.c
> +
> +diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
> +index b80ff889f15..47ed83e50e6 100644
> +--- a/gcc/testsuite/ChangeLog
> ++++ b/gcc/testsuite/ChangeLog
> +@@ -1,4 +1,9 @@
> +-2018-07-26 Release Manager
> ++2019-08-23 Segher Boessenkool <segher at kernel.crashing.org>
> ++
> ++ PR target/91481
> ++ * gcc.target/powerpc/darn-3.c: New testcase.
> ++
> ++2019-08-23 Marek Polacek <polacek at redhat.com>
> +
> + * GCC 8.2.0 released.
> +
> +diff --git a/gcc/testsuite/gcc.target/powerpc/darn-3.c b/gcc/testsuite/gcc.target/powerpc/darn-3.c
> +new file mode 100644
> +index 00000000000..477901fde70
> +--- /dev/null
> ++++ b/gcc/testsuite/gcc.target/powerpc/darn-3.c
> +@@ -0,0 +1,16 @@
> ++/* { dg-do compile { target { powerpc*-*-* } } } */
> ++/* { dg-skip-if "" { powerpc*-*-aix* } } */
> ++/* { dg-options "-O2 -mdejagnu-cpu=power9" } */
> ++
> ++static int darn32(void) { return __builtin_darn_32(); }
> ++
> ++int four(void)
> ++{
> ++ int sum = 0;
> ++ int i;
> ++ for (i = 0; i < 4; i++)
> ++ sum += darn32();
> ++ return sum;
> ++}
> ++
> ++/* { dg-final { scan-assembler-times {(?n)\mdarn .*,0\M} 4 } } */
> +--
> +2.23.0
> +
> diff --git a/meta/recipes-devtools/gcc/gcc_8.2.bb b/meta/recipes-devtools/gcc/gcc_8.2.bb
> index 7d93590588..484bd05f66 100644
> --- a/meta/recipes-devtools/gcc/gcc_8.2.bb
> +++ b/meta/recipes-devtools/gcc/gcc_8.2.bb
> @@ -12,3 +12,7 @@ ARMFPARCHEXT_armv7a = "${@'+fp' if d.getVar('TARGET_FPU') == 'hard' else ''}"
> ARMFPARCHEXT_armv7ve = "${@'+fp' if d.getVar('TARGET_FPU') == 'hard' else ''}"
>
> BBCLASSEXTEND = "nativesdk"
> +
> +SRC_URI += "\
> + file:///CVE-2019-15847.patch \
> + "
this should be added to gcc-8.2.inc so it can apply to all gcc recipes.
secondly there seem to be many patches bundled into a single patch, I
think it will be better to get
each patch individually.
> --
> 2.23.0
>
> --
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