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From: Michael D. <mda...@qn...> - 2015-11-19 17:07:26
|
Hello, It seems newer versions of libgcc[0] have started using assembly like this: strd ip, lr, [sp, #-16]! Since VEX only checks for #-8, this is causing lots of complaints about invalid writes below the stack pointer. Attached is a patch to remove the check all together, allowing any negative immediates without generating a lot of noise. [0] https://github.com/gcc-mirror/gcc/blob/7aea4e7cdcd40d7bd47c64e76325a62191887d1b/libgcc/config/arm/bpabi.S#L151 Thanks, Mike --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. |
|
From: Michael D. <mda...@qn...> - 2015-11-19 16:52:02
|
Hello, The inline assembly in do_cmpxchg8b() clobbers rbx, but it is not in the clobber list (likely just a spelling mistake, as rdx is in there twice). This was causing problems for me when running this test on our platform. Simple patch attached. Thanks, Mike --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. |
|
From: Michael D. <mda...@qn...> - 2015-11-19 16:52:02
|
Hello, When using GCC 5.2 I am seeing this assembly generated in some cases: add.w reg, sp, reg, lsl #4 The current limit is 3 though, so it was causing it to be caught as an unhandled instruction. Patch attached to bump the number from 3 to 4. Thanks, Mike --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. |
|
From: <sv...@va...> - 2015-11-19 09:34:37
|
Author: iraisr
Date: Thu Nov 19 09:34:29 2015
New Revision: 15732
Log:
Solaris syscall: Fix pset(getloadavg).
The buffer holds integers, not doubles.
n-i-bz
Modified:
trunk/coregrind/m_syswrap/syswrap-solaris.c
trunk/memcheck/tests/solaris/scalar.stderr.exp
Modified: trunk/coregrind/m_syswrap/syswrap-solaris.c
==============================================================================
--- trunk/coregrind/m_syswrap/syswrap-solaris.c (original)
+++ trunk/coregrind/m_syswrap/syswrap-solaris.c Thu Nov 19 09:34:29 2015
@@ -9246,9 +9246,9 @@
int nelem); */
PRINT("sys_pset ( %ld, %ld, %#lx, %ld )", SARG1, SARG2, ARG3, SARG4);
PRE_REG_READ4(long, SC2("pset", "getloadavg"), int, subcode,
- vki_psetid_t, pset, double, loadavg[], int, nelem);
+ vki_psetid_t, pset, int *, buf, int, nelem);
if (ARG3 != 0)
- PRE_MEM_WRITE("pset(loadavg)", ARG3, SARG4 * sizeof(double));
+ PRE_MEM_WRITE("pset(buf)", ARG3, SARG4 * sizeof(int));
break;
case VKI_PSET_LIST:
/* Libc: int pset_list(psetid_t *psetlist, uint_t *numpsets); */
@@ -9341,7 +9341,7 @@
break;
case VKI_PSET_GETLOADAVG:
if (ARG3 != 0)
- POST_MEM_WRITE(ARG3, MIN(SARG4, VKI_LOADAVG_NSTATS) * sizeof(double));
+ POST_MEM_WRITE(ARG3, MIN(SARG4, VKI_LOADAVG_NSTATS) * sizeof(int));
break;
case VKI_PSET_LIST:
if (ARG3 != 0)
Modified: trunk/memcheck/tests/solaris/scalar.stderr.exp
==============================================================================
--- trunk/memcheck/tests/solaris/scalar.stderr.exp (original)
+++ trunk/memcheck/tests/solaris/scalar.stderr.exp Thu Nov 19 09:34:29 2015
@@ -4338,13 +4338,13 @@
Syscall param pset_getloadavg(pset) contains uninitialised byte(s)
...
-Syscall param pset_getloadavg(loadavg[]) contains uninitialised byte(s)
+Syscall param pset_getloadavg(buf) contains uninitialised byte(s)
...
Syscall param pset_getloadavg(nelem) contains uninitialised byte(s)
...
-Syscall param pset(loadavg) points to unaddressable byte(s)
+Syscall param pset(buf) points to unaddressable byte(s)
...
Address 0x........ is not stack'd, malloc'd or (recently) free'd
|