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SUSE:SLE-15-SP2:GA
valgrind.7869
Implement-emulated-system-registers.-Fixes-3921...
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File Implement-emulated-system-registers.-Fixes-392146.patch of Package valgrind.7869
From a940156fc32b0c49e847aec0e4076161241cfa15 Mon Sep 17 00:00:00 2001 From: Matthias Brugger <mbrugger@suse.com> Date: Wed, 6 Jun 2018 15:23:07 +0200 Subject: [PATCH] Implement emulated system registers. Fixes #392146. Signed-off-by: Matthias Brugger <mbrugger@suse.com> --- VEX/priv/guest_arm64_defs.h | 9 ++ VEX/priv/guest_arm64_helpers.c | 100 +++++++++++++++ VEX/priv/guest_arm64_toIR.c | 222 +++++++++++++++++++++++++++++++++ 3 files changed, 331 insertions(+) diff --git a/VEX/priv/guest_arm64_defs.h b/VEX/priv/guest_arm64_defs.h index b28f326c2..ae01e6f3b 100644 --- a/VEX/priv/guest_arm64_defs.h +++ b/VEX/priv/guest_arm64_defs.h @@ -126,6 +126,15 @@ extern ULong arm64g_dirtyhelper_MRS_CNTVCT_EL0 ( void ); extern ULong arm64g_dirtyhelper_MRS_CNTFRQ_EL0 ( void ); +extern ULong arm64g_dirtyhelper_MRS_MIDR_EL1 ( void ); + +extern ULong arm64g_dirtyhelper_MRS_ID_AA64PFR0_EL1 ( void ); + +extern ULong arm64g_dirtyhelper_MRS_ID_AA64MMFR0_EL1 ( void ); +extern ULong arm64g_dirtyhelper_MRS_ID_AA64MMFR1_EL1 ( void ); + +extern ULong arm64g_dirtyhelper_MRS_ID_AA64ISAR0_EL1 ( void ); + extern void arm64g_dirtyhelper_PMULLQ ( /*OUT*/V128* res, ULong arg1, ULong arg2 ); diff --git a/VEX/priv/guest_arm64_helpers.c b/VEX/priv/guest_arm64_helpers.c index 10065d547..c579c9e1b 100644 --- a/VEX/priv/guest_arm64_helpers.c +++ b/VEX/priv/guest_arm64_helpers.c @@ -788,6 +788,106 @@ ULong arm64g_dirtyhelper_MRS_CNTFRQ_EL0 ( void ) # endif } +/* CALLED FROM GENERATED CODE */ +/* DIRTY HELPER (non-referentially-transparent) */ +/* Horrible hack. On non-arm64 platforms, return 0. */ +ULong arm64g_dirtyhelper_MRS_MIDR_EL1 ( void ) +{ +# if defined(__aarch64__) && !defined(__arm__) + ULong w = 0x5555555555555555ULL; /* overwritten */ + __asm__ __volatile__("mrs %0, midr_el1" : "=r"(w)); + return w; +# else + return 0ULL; +# endif +} + +/* CALLED FROM GENERATED CODE */ +/* DIRTY HELPER (non-referentially-transparent) */ +/* Horrible hack. On non-arm64 platforms, return 0. */ +ULong arm64g_dirtyhelper_MRS_ID_AA64PFR0_EL1 ( void ) +{ +# if defined(__aarch64__) && !defined(__arm__) + ULong w = 0x5555555555555555ULL; /* overwritten */ + __asm__ __volatile__("mrs %0, id_aa64pfr0_el1" : "=r"(w)); + + /* If half-precision fp is present we fall back to normal + half precision implementation because of missing support in the emulation. + If no AdvSIMD and FP are implemented, we preserve the value */ + w = (w >> 16); + w &= 0xff; + switch(w) { + case 0x11: + w = 0x0; + break; + case 0xff: + w = (0xFF<<16); + break; + default: + w = 0x0; + break; + } + + return w; +# else + return 0ULL; +# endif +} + +/* CALLED FROM GENERATED CODE */ +/* DIRTY HELPER (non-referentially-transparent) */ +/* Horrible hack. On non-arm64 platforms, return 0. */ +ULong arm64g_dirtyhelper_MRS_ID_AA64MMFR0_EL1 ( void ) +{ +# if defined(__aarch64__) && !defined(__arm__) + ULong w = 0x5555555555555555ULL; /* overwritten */ + __asm__ __volatile__("mrs %0, id_aa64mmfr0_el1" : "=r"(w)); + return w; +# else + return 0ULL; +# endif +} + +/* CALLED FROM GENERATED CODE */ +/* DIRTY HELPER (non-referentially-transparent) */ +/* Horrible hack. On non-arm64 platforms, return 0. */ +ULong arm64g_dirtyhelper_MRS_ID_AA64MMFR1_EL1 ( void ) +{ +# if defined(__aarch64__) && !defined(__arm__) + ULong w = 0x5555555555555555ULL; /* overwritten */ + __asm__ __volatile__("mrs %0, id_aa64mmfr1_el1" : "=r"(w)); + + /* Clear VH and HAFDBS bits */ + w &= ~(0xF0F); + return w; +# else + return 0ULL; +# endif +} + +/* CALLED FROM GENERATED CODE */ +/* DIRTY HELPER (non-referentially-transparent) */ +/* Horrible hack. On non-arm64 platforms, return 0. */ +ULong arm64g_dirtyhelper_MRS_ID_AA64ISAR0_EL1 ( void ) +{ +# if defined(__aarch64__) && !defined(__arm__) + ULong w = 0x5555555555555555ULL; /* overwritten */ + __asm__ __volatile__("mrs %0, id_aa64isar0_el1" : "=r"(w)); + + /* Clear all but AES, SHA1 and SHA2 parts*/ + w &= ~0xFFFF; + /* Degredate SHA2 from b0010 to b0001*/ + if ( (w >> 12) & 0x2 ) { + w &= ~(0xF << 12); + w |= (0x1 << 12); + } + + return w; +# else + return 0ULL; +# endif +} + void arm64g_dirtyhelper_PMULLQ ( /*OUT*/V128* res, ULong arg1, ULong arg2 ) { diff --git a/VEX/priv/guest_arm64_toIR.c b/VEX/priv/guest_arm64_toIR.c index e5af388e1..ed6c1ffa5 100644 --- a/VEX/priv/guest_arm64_toIR.c +++ b/VEX/priv/guest_arm64_toIR.c @@ -6872,6 +6872,228 @@ Bool dis_ARM64_branch_etc(/*MB_OUT*/DisResult* dres, UInt insn, } /* ------------------ M{SR,RS} ------------------ */ + /* ---- Case for MIDR_EL1 (RO) ---- + Read the Main ID register from host. + 0xD53800 000 Rt MRS rT, midr_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD5380000 /*MRS*/) { + UInt tt = INSN(4,0); + IRTemp val = newTemp(Ity_I64); + IRExpr** args = mkIRExprVec_0(); + IRDirty* d = unsafeIRDirty_1_N ( + val, + 0/*regparms*/, + "arm64g_dirtyhelper_MRS_MIDR_EL1", + &arm64g_dirtyhelper_MRS_MIDR_EL1, + args + ); + /* execute the dirty call, dumping the result in val. */ + stmt( IRStmt_Dirty(d) ); + putIReg64orZR(tt, mkexpr(val)); + DIP("mrs %s, midr_el1\n", nameIReg64orZR(tt)); + return True; + } + /* ---- Case for MPIDR_EL1 (RO) ---- + Instead of returing a fake regiser, we use the same + value as does the kernel emulation. + 0xD53800 101 Rt MRS rT, mpidr_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD53800A0 /*MRS*/) { + UInt tt = INSN(4,0); + putIReg64orZR(tt, mkU64((1UL<<31))); + DIP("mrs %s, mpidr_el1 (FAKED)\n", nameIReg64orZR(tt)); + return True; + } + /* ---- Case for REVDIR_EL1 (RO) ---- + Instead of emulating the regiser, we just return the same + value as does the kernel emulation. + 0xD53800 110 Rt MRS rT, revdir_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD53800C0 /*MRS*/) { + UInt tt = INSN(4,0); + putIReg32orZR(tt, mkU32(0x0)); + DIP("mrs %s, revdir_el1 (FAKED)\n", nameIReg32orZR(tt)); + return True; + } + /* ---- Case for ID_AA64PFR0_EL1 (RO) ---- + Instead of returing a fake regiser, we use the same + value as does the kernel emulation. We set deprecate half + precission floating-point to normal floating-point support. + We set all other values to zero. + 0xD53804 000 Rt MRS rT, id_aa64pfr0_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD5380400 /*MRS*/) { + UInt tt = INSN(4,0); + IRTemp val = newTemp(Ity_I64); + IRExpr** args = mkIRExprVec_0(); + IRDirty* d = unsafeIRDirty_1_N ( + val, + 0/*regparms*/, + "arm64g_dirtyhelper_MRS_ID_AA64PFR0_EL1", + &arm64g_dirtyhelper_MRS_ID_AA64PFR0_EL1, + args + ); + /* execute the dirty call, dumping the result in val. */ + stmt( IRStmt_Dirty(d) ); + + putIReg64orZR(tt, mkexpr(val)); + return True; + } + /* ---- Case for ID_AA64PFR1_EL1 (RO) ---- + We just return 0x0 here, as we don't support the opcodes of + new commands in the emulation environment. + 0xD53804 001 Rt MRS rT, id_aa64pfr1_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD5380420 /*MRS*/) { + UInt tt = INSN(4,0); + putIReg64orZR(tt, mkU64(0x0)); + DIP("mrs %s, id_aa64pfr1_el1 (FAKED)\n", nameIReg32orZR(tt)); + return True; + } + /* ---- Case for ID_AA64ZFR0_EL1 (RO) ---- + We just return 0x0 here, as we don't support the opcodes of + new commands in the emulation environment. + 0xD53804 010 Rt MRS rT, id_aa64zfr0_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD5380440 /*MRS*/) { + UInt tt = INSN(4,0); + putIReg64orZR(tt, mkU64(0x0)); + DIP("mrs %s, id_aa64zfr0_el1 (FAKED)\n", nameIReg64orZR(tt)); + return True; + } + /* ---- Case for ID_AA64DFR0_EL1 (RO) ---- + Just return the value indicating the implementation of the + ARMv8 debug architecture without any extensions. + 0xD53805 000 Rt MRS rT, id_aa64dfr0_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD5380500 /*MRS*/) { + UInt tt = INSN(4,0); + putIReg64orZR(tt, mkU64(0x6)); + DIP("mrs %s, id_aa64dfr0_el1 (FAKED)\n", nameIReg64orZR(tt)); + return True; + } + /* ---- Case for ID_AA64DFR1_EL1 (RO) ---- + We just return 0x0 here, as we don't support the opcodes of + new commands in the emulation environment. + 0xD53805 001 Rt MRS rT, id_aa64dfr1_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD5380520 /*MRS*/) { + UInt tt = INSN(4,0); + putIReg64orZR(tt, mkU64(0x0)); + DIP("mrs %s, id_aa64dfr1_el1 (FAKED)\n", nameIReg64orZR(tt)); + return True; + } + /* ---- Case for ID_AA64AFR0_EL1 (RO) ---- + We just return 0x0 here, as we don't support the opcodes of + new commands in the emulation environment. + 0xD53805 100 Rt MRS rT, id_aa64afr0_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD5380580 /*MRS*/) { + UInt tt = INSN(4,0); + putIReg64orZR(tt, mkU64(0x0)); + DIP("mrs %s, id_aa64afr0_el1 (FAKED)\n", nameIReg64orZR(tt)); + return True; + } + /* ---- Case for ID_AA64AFR1_EL1 (RO) ---- + We just return 0x0 here, as we don't support the opcodes of + new commands in the emulation environment. + 0xD53805 101 Rt MRS rT, id_aa64afr1_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD53805A0 /*MRS*/) { + UInt tt = INSN(4,0); + putIReg64orZR(tt, mkU64(0x0)); + DIP("mrs %s, id_aa64afr1_el1 (FAKED)\n", nameIReg64orZR(tt)); + return True; + } + /* ---- Case for ID_AA64ISAR0_EL1 (RO) ---- + We only take care of SHA2, SHA1 and AES bits, as all the other + commands are not part of the emulation environment. + We degredate SHA2 from 0x2 to 0x1 as we don't support the commands. + 0xD53806 000 Rt MRS rT, id_aa64isar0_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD5380600 /*MRS*/) { + UInt tt = INSN(4,0); + IRTemp val = newTemp(Ity_I64); + IRExpr** args = mkIRExprVec_0(); + IRDirty* d = unsafeIRDirty_1_N ( + val, + 0/*regparms*/, + "arm64g_dirtyhelper_MRS_ID_AA64ISAR0_EL1", + &arm64g_dirtyhelper_MRS_ID_AA64ISAR0_EL1, + args + ); + /* execute the dirty call, dumping the result in val. */ + stmt( IRStmt_Dirty(d) ); + putIReg64orZR(tt, mkexpr(val)); + DIP("mrs %s, id_aa64isar0_el1 (FAKED)\n", nameIReg64orZR(tt)); + return True; + } + /* ---- Case for ID_AA64ISAR1_EL1 (RO) ---- + We just return 0x0 here, as we don't support the opcodes of + new commands in the emulation environment. + 0xD53806 001 Rt MRS rT, id_aa64isar1_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD5380620 /*MRS*/) { + UInt tt = INSN(4,0); + putIReg64orZR(tt, mkU64(0x0)); + DIP("mrs %s, id_aa64isar1_el1 (FAKED)\n", nameIReg64orZR(tt)); + return True; + } + /* ---- Case for ID_AA64MMFR0_EL1 (RO) ---- + Instead of returing a fake regiser, we use the same + value as does the kernel emulation. + 0xD53807 000 Rt MRS rT, id_aa64mmfr0_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD5380700 /*MRS*/) { + UInt tt = INSN(4,0); + IRTemp val = newTemp(Ity_I64); + IRExpr** args = mkIRExprVec_0(); + IRDirty* d = unsafeIRDirty_1_N ( + val, + 0/*regparms*/, + "arm64g_dirtyhelper_MRS_ID_AA64MMFR0_EL1", + &arm64g_dirtyhelper_MRS_ID_AA64MMFR0_EL1, + args + ); + /* execute the dirty call, dumping the result in val. */ + stmt( IRStmt_Dirty(d) ); + putIReg64orZR(tt, mkexpr(val)); + DIP("mrs %s, id_aa64mmfr0_el1 (FAKED)\n", nameIReg64orZR(tt)); + return True; + } + /* ---- Case for ID_AA64MMFR1_EL1 (RO) ---- + Instead of returing a fake regiser, we use the same + value as does the kernel emulation. Set VHE and HAFDBS + to not implemented. + 0xD53807 001 Rt MRS rT, id_aa64mmfr1_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD5380720 /*MRS*/) { + UInt tt = INSN(4,0); + IRTemp val = newTemp(Ity_I64); + IRExpr** args = mkIRExprVec_0(); + IRDirty* d = unsafeIRDirty_1_N ( + val, + 0/*regparms*/, + "arm64g_dirtyhelper_MRS_ID_AA64MMFR1_EL1", + &arm64g_dirtyhelper_MRS_ID_AA64MMFR1_EL1, + args + ); + /* execute the dirty call, dumping the result in val. */ + stmt( IRStmt_Dirty(d) ); + putIReg64orZR(tt, mkexpr(val)); + DIP("mrs %s, id_aa64mmfr1_el1 (FAKED)\n", nameIReg64orZR(tt)); + return True; + } + /* ---- Case for ID_AA64MMFR2_EL1 (RO) ---- + Return faked value of not implemented ARMv8.2 and ARMv8.3 + 0xD53807 010 Rt MRS rT, id_aa64mmfr2_el1 + */ + if ((INSN(31,0) & 0xFFFFFFE0) == 0xD5380740 /*MRS*/) { + UInt tt = INSN(4,0); + putIReg64orZR(tt, mkU64(0x0)); + DIP("mrs %s, id_aa64mmfr2_el1 (FAKED)\n", nameIReg64orZR(tt)); + return True; + } /* ---- Cases for TPIDR_EL0 ---- 0xD51BD0 010 Rt MSR tpidr_el0, rT 0xD53BD0 010 Rt MRS rT, tpidr_el0 -- 2.17.0
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