https://bugs.kde.org/show_bug.cgi?id=434849
Bug ID: 434849
Summary: The vdso is not available when running on ppc64*
Product: valgrind
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: jsew...@acm.org
Reporter: tul...@quites.com.br
Target Milestone: ---
When running valgrind on ppc64le, the value of AT_SYSINFO_EHDR is hidden from
the application. That is the address where the vDSO has been stored by Linux.
A way to reproduce it is to request the loader (ld.so) to print the auxiliary
vector: LD_SHOW_AUXV=1 ./valgrind /bin/true
This is going to print the auxv 2 times:
1. When ld.so runs valgrind;
2. When /bin/true is executed under valgrind.
Notice the absence of AT_SYSINFO_EHDR in the second execution:
AT_DCACHEBSIZE: 0x80
AT_ICACHEBSIZE: 0x80
AT_UCACHEBSIZE: 0x0
AT_SYSINFO_EHDR: 0x7fff9f640000
AT_L1I_CACHESIZE: 32768
AT_L1I_CACHEGEOMETRY: 128B line size, Unknown associativity
AT_L1D_CACHESIZE: 32768
AT_L1D_CACHEGEOMETRY: 128B line size, Unknown associativity
AT_L2_CACHESIZE: 0
AT_L2_CACHEGEOMETRY: Unknown line size, Unknown associativity
AT_L3_CACHESIZE: 0
AT_L3_CACHEGEOMETRY: Unknown line size, Unknown associativity
AT_HWCAP: true_le archpmu vsx arch_2_06 dfp ic_snoop smt mmu fpu
altivec ppc64 ppc32
AT_PAGESZ: 65536
AT_CLKTCK: 100
AT_PHDR: 0x10000040
AT_PHENT: 56
AT_PHNUM: 9
AT_BASE: 0x7fff9f660000
AT_FLAGS: 0x0
AT_ENTRY: 0x10001508
AT_UID: 1000
AT_EUID: 1000
AT_GID: 100
AT_EGID: 100
AT_SECURE: 0
AT_RANDOM: 0x7fffed9aa3b2
AT_HWCAP2: scv darn ieee128 arch_3_00 vcrypto tar isel ebb dscr
arch_2_07
AT_EXECFN: ./valgrind
AT_PLATFORM: power9
AT_BASE_PLATFORM: power9
==19155== Memcheck, a memory error detector
==19155== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==19155== Using Valgrind-3.18.0.GIT and LibVEX; rerun with -h for copyright
info
==19155== Command: /bin/true
==19155==
AT_DCACHEBSIZE: 0x80
AT_ICACHEBSIZE: 0x80
AT_UCACHEBSIZE: 0x0
AT_HWCAP: true_le archpmu vsx arch_2_06 dfp ic_snoop smt mmu fpu
altivec ppc64 ppc32
AT_PAGESZ: 65536
AT_CLKTCK: 100
AT_PHDR: 0x180040
AT_PHENT: 56
AT_PHNUM: 9
AT_BASE: 0x4000000
AT_FLAGS: 0x0
AT_ENTRY: 0x181c44
AT_UID: 1000
AT_EUID: 1000
AT_GID: 100
AT_EGID: 100
AT_SECURE: 0
AT_RANDOM: 0x1fff00ffd7
AT_HWCAP2: ieee128 arch_3_00 tar isel ebb dscr arch_2_07
AT_EXECFN: /bin/true
AT_PLATFORM: power9
AT_BASE_PLATFORM: power9
==19155==
==19155== HEAP SUMMARY:
==19155== in use at exit: 0 bytes in 0 blocks
==19155== total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==19155==
==19155== All heap blocks were freed -- no leaks are possible
==19155==
==19155== For lists of detected and suppressed errors, rerun with: -s
==19155== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
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