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| author | Lang Hames <lhames@gmail.com> | 2016-02-21 22:50:26 +0000 |
|---|---|---|
| committer | Lang Hames <lhames@gmail.com> | 2016-02-21 22:50:26 +0000 |
| commit | e1fd99c197ede469c25d2c25e24397130a0a48f3 (patch) | |
| tree | b18ee8b2dddf977d0e78bb6bb52c9593f19a337e /llvm/lib | |
| parent | f65e407c6e7248b54074610b5faabd2a4f176246 (diff) | |
| download | bcm5719-llvm-e1fd99c197ede469c25d2c25e24397130a0a48f3.tar.gz bcm5719-llvm-e1fd99c197ede469c25d2c25e24397130a0a48f3.zip | |
[Orc] Add stack-realignment code to the i386 resolver function.
The resolver uses the fxsave/fxrstor instructions, which require 16-byte
alignment, to save SSE state to the stack. Since 16-byte alignment can't be
assumed on all OSes (and all i386 OSes share this function) - add code to
automatically bump the alignment to 16-bytes on entry to the function.
llvm-svn: 261503
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/ExecutionEngine/Orc/OrcArchitectureSupport.cpp | 57 |
1 files changed, 30 insertions, 27 deletions
diff --git a/llvm/lib/ExecutionEngine/Orc/OrcArchitectureSupport.cpp b/llvm/lib/ExecutionEngine/Orc/OrcArchitectureSupport.cpp index c9b73114e37..06c2a8c42f6 100644 --- a/llvm/lib/ExecutionEngine/Orc/OrcArchitectureSupport.cpp +++ b/llvm/lib/ExecutionEngine/Orc/OrcArchitectureSupport.cpp @@ -172,35 +172,38 @@ void OrcI386::writeResolverCode(uint8_t *ResolverMem, JITReentryFn ReentryFn, // resolver_entry: 0x55, // 0x00: pushl %ebp 0x89, 0xe5, // 0x01: movl %esp, %ebp - 0x50, // 0x03: pushl %eax - 0x53, // 0x04: pushl %ebx - 0x51, // 0x05: pushl %ecx - 0x52, // 0x06: pushl %edx - 0x56, // 0x07: pushl %esi - 0x57, // 0x08: pushl %edi - 0x81, 0xec, 0x1C, 0x02, 0x00, 0x00, // 0x09: subl $0x21C, %esp - 0x0f, 0xae, 0x44, 0x24, 0x10, // 0x0f: fxsave 0x10(%esp) - 0x8b, 0x75, 0x04, // 0x14: movl 0x4(%ebp), %esi - 0x83, 0xee, 0x05, // 0x17: subl $0x5, %esi - 0x89, 0x74, 0x24, 0x04, // 0x1a: movl %esi, 0x4(%esp) - 0xc7, 0x04, 0x24, 0x00, 0x00, 0x00, 0x00, // 0x1e: movl <cbmgr>, (%esp) - 0xb8, 0x00, 0x00, 0x00, 0x00, // 0x25: movl <reentry>, %eax - 0xff, 0xd0, // 0x2a: calll *%eax - 0x89, 0x45, 0x04, // 0x2c: movl %eax, 0x4(%ebp) - 0x0f, 0xae, 0x4c, 0x24, 0x10, // 0x2f: fxrstor 0x10(%esp) - 0x81, 0xc4, 0x1c, 0x02, 0x00, 0x00, // 0x34: addl $0x21C, %esp - 0x5f, // 0x3a: popl %edi - 0x5e, // 0x3b: popl %esi - 0x5a, // 0x3c: popl %edx - 0x59, // 0x3d: popl %ecx - 0x5b, // 0x3e: popl %ebx - 0x58, // 0x3f: popl %eax - 0x5d, // 0x40: popl %ebp - 0xc3 // 0x41: retl + 0x54, // 0x03: pushl %esp + 0x83, 0xe4, 0xf0, // 0x04: andl $-0x10, %esp + 0x50, // 0x07: pushl %eax + 0x53, // 0x08: pushl %ebx + 0x51, // 0x09: pushl %ecx + 0x52, // 0x0a: pushl %edx + 0x56, // 0x0b: pushl %esi + 0x57, // 0x0c: pushl %edi + 0x81, 0xec, 0x18, 0x02, 0x00, 0x00, // 0x0d: subl $0x218, %esp + 0x0f, 0xae, 0x44, 0x24, 0x10, // 0x13: fxsave 0x10(%esp) + 0x8b, 0x75, 0x04, // 0x18: movl 0x4(%ebp), %esi + 0x83, 0xee, 0x05, // 0x1b: subl $0x5, %esi + 0x89, 0x74, 0x24, 0x04, // 0x1e: movl %esi, 0x4(%esp) + 0xc7, 0x04, 0x24, 0x00, 0x00, 0x00, 0x00, // 0x22: movl <cbmgr>, (%esp) + 0xb8, 0x00, 0x00, 0x00, 0x00, // 0x29: movl <reentry>, %eax + 0xff, 0xd0, // 0x2e: calll *%eax + 0x89, 0x45, 0x04, // 0x30: movl %eax, 0x4(%ebp) + 0x0f, 0xae, 0x4c, 0x24, 0x10, // 0x33: fxrstor 0x10(%esp) + 0x81, 0xc4, 0x18, 0x02, 0x00, 0x00, // 0x38: addl $0x218, %esp + 0x5f, // 0x3e: popl %edi + 0x5e, // 0x3f: popl %esi + 0x5a, // 0x40: popl %edx + 0x59, // 0x41: popl %ecx + 0x5b, // 0x42: popl %ebx + 0x58, // 0x43: popl %eax + 0x8b, 0x65, 0xfc, // 0x44: movl -0x4(%ebp), %esp + 0x5d, // 0x48: popl %ebp + 0xc3 // 0x49: retl }; - const unsigned ReentryFnAddrOffset = 0x26; - const unsigned CallbackMgrAddrOffset = 0x21; + const unsigned ReentryFnAddrOffset = 0x2a; + const unsigned CallbackMgrAddrOffset = 0x25; memcpy(ResolverMem, ResolverCode, sizeof(ResolverCode)); memcpy(ResolverMem + ReentryFnAddrOffset, &ReentryFn, sizeof(ReentryFn)); |
