Make i386-*-freebsd expression work on JIT path

* Enable i386 ABI creation for freebsd
* Added an extra argument in ABISysV_i386::PrepareTrivialCall for mmap
  syscall
* Unlike linux, the last argument of mmap is actually 64-bit(off_t).
  This requires us to push an additional word for the higher order bits.
* Prior to this change, ktrace dump will show mmap failures due to
  invalid argument coming from the 6th mmap argument.

Patch by Karnajit Wangkhem

Differential Revision:	https://reviews.llvm.org/D34776

llvm-svn: 311002

2 files changed, 11 insertions, 5 deletions

diff --git a/lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp b/lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp
index 0bf00ea3079..e26cdcd32aa 100644
--- a/lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp
+++ b/lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp
@@ -390,8 +390,10 @@ void PlatformLinux::CalculateTrapHandlerSymbolNames() {
   m_trap_handlers.push_back(ConstString("_sigtramp"));
 }
 
-uint64_t PlatformLinux::ConvertMmapFlagsToPlatform(const ArchSpec &arch,
-                                                   unsigned flags) {
+MmapArgList PlatformLinux::GetMmapArgumentList(const ArchSpec &arch,
+                                               addr_t addr, addr_t length,
+                                               unsigned prot, unsigned flags,
+                                               addr_t fd, addr_t offset) {
   uint64_t flags_platform = 0;
   uint64_t map_anon = MAP_ANON;
 
@@ -406,6 +408,8 @@ uint64_t PlatformLinux::ConvertMmapFlagsToPlatform(const ArchSpec &arch,
     flags_platform |= MAP_PRIVATE;
   if (flags & eMmapFlagsAnon)
     flags_platform |= map_anon;
-  return flags_platform;
+
+  MmapArgList args({addr, length, prot, flags_platform, fd, offset});
+  return args;
 }
 
diff --git a/lldb/source/Plugins/Platform/Linux/PlatformLinux.h b/lldb/source/Plugins/Platform/Linux/PlatformLinux.h
index bc7b723427f..50d721f7c07 100644
--- a/lldb/source/Plugins/Platform/Linux/PlatformLinux.h
+++ b/lldb/source/Plugins/Platform/Linux/PlatformLinux.h
@@ -59,8 +59,10 @@ public:
 
   void CalculateTrapHandlerSymbolNames() override;
 
-  uint64_t ConvertMmapFlagsToPlatform(const ArchSpec &arch,
-                                      unsigned flags) override;
+  MmapArgList GetMmapArgumentList(const ArchSpec &arch, lldb::addr_t addr,
+                                  lldb::addr_t length, unsigned prot,
+                                  unsigned flags, lldb::addr_t fd,
+                                  lldb::addr_t offset) override;
 
 private:
   DISALLOW_COPY_AND_ASSIGN(PlatformLinux);