72 lines
2.5 KiB
Diff
72 lines
2.5 KiB
Diff
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diff --git a/coregrind/m_syswrap/priv_syswrap-generic.h b/coregrind/m_syswrap/priv_syswrap-generic.h
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index 4717abac6..c50b31399 100644
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--- a/coregrind/m_syswrap/priv_syswrap-generic.h
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+++ b/coregrind/m_syswrap/priv_syswrap-generic.h
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@@ -106,6 +106,10 @@ extern Bool
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ML_(handle_auxv_open)(SyscallStatus *status, const HChar *filename,
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int flags);
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+extern Bool
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+ML_(handle_self_exe_open)(SyscallStatus *status, const HChar *filename,
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+ int flags);
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+
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/* Helper function for generic mprotect and linux pkey_mprotect. */
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extern void handle_sys_mprotect (ThreadId tid, SyscallStatus *status,
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Addr *addr, SizeT *len, Int *prot);
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diff --git a/coregrind/m_syswrap/syswrap-generic.c b/coregrind/m_syswrap/syswrap-generic.c
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index 7d4b385a3..3810f7474 100644
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--- a/coregrind/m_syswrap/syswrap-generic.c
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+++ b/coregrind/m_syswrap/syswrap-generic.c
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@@ -4078,6 +4078,38 @@ Bool ML_(handle_auxv_open)(SyscallStatus *status, const HChar *filename,
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}
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#endif // defined(VGO_linux) || defined(VGO_solaris)
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+#if defined(VGO_linux)
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+Bool ML_(handle_self_exe_open)(SyscallStatus *status, const HChar *filename,
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+ int flags)
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+{
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+ HChar name[30]; // large enough for /proc/<int>/exe
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+
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+ if (!ML_(safe_to_deref)((const void *) filename, 1))
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+ return False;
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+
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+ /* Opening /proc/<pid>/exe or /proc/self/exe? */
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+ VG_(sprintf)(name, "/proc/%d/exe", VG_(getpid)());
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+ if (!VG_STREQ(filename, name) && !VG_STREQ(filename, "/proc/self/exe"))
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+ return False;
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+
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+ /* Allow to open the file only for reading. */
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+ if (flags & (VKI_O_WRONLY | VKI_O_RDWR)) {
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+ SET_STATUS_Failure(VKI_EACCES);
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+ return True;
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+ }
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+
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+ SysRes sres = VG_(dup)(VG_(cl_exec_fd));
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+ SET_STATUS_from_SysRes(sres);
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+ if (!sr_isError(sres)) {
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+ OffT off = VG_(lseek)(sr_Res(sres), 0, VKI_SEEK_SET);
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+ if (off < 0)
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+ SET_STATUS_Failure(VKI_EMFILE);
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+ }
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+
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+ return True;
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+}
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+#endif // defined(VGO_linux)
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+
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PRE(sys_open)
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{
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if (ARG2 & VKI_O_CREAT) {
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@@ -4119,8 +4151,10 @@ PRE(sys_open)
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}
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}
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- /* Handle also the case of /proc/self/auxv or /proc/<pid>/auxv. */
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- if (ML_(handle_auxv_open)(status, (const HChar *)(Addr)ARG1, ARG2))
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+ /* Handle also the case of /proc/self/auxv or /proc/<pid>/auxv
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+ or /proc/self/exe or /proc/<pid>/exe. */
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+ if (ML_(handle_auxv_open)(status, (const HChar *)(Addr)ARG1, ARG2)
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+ || ML_(handle_self_exe_open)(status, (const HChar *)(Addr)ARG1, ARG2))
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return;
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#endif // defined(VGO_linux)
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