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# 24faade4 02-Sep-2015 Frederic Riss <[email protected]>

Reapply r246012 [dsymutil] Emit real dSYM companion binaries.

With a fix for big endian machines. Thanks to Daniel Sanders for the debugging!

Original commit message:

The binaries containing the l

Reapply r246012 [dsymutil] Emit real dSYM companion binaries.

With a fix for big endian machines. Thanks to Daniel Sanders for the debugging!

Original commit message:

The binaries containing the linked DWARF generated by dsymutil are not
standard relocatable object files like emitted did previsously. They should be
dSYM companion files, which means they have a different file type in the
header, but also a couple other peculiarities:
- they contain the segments and sections from the original binary in their
load commands, but not the actual contents. This means they get an address
and a size, but their offset is always 0 (but these are not virtual sections)
- they also conatin all the defined symbols from the original binary

This makes MC a really bad fit to emit these kind of binaries. The approach
that was used in this patch is to leverage MC's section layout for the
debug sections, but to use a replacement for MachObjectWriter that lives
in MachOUtils.cpp. Some of the low-level helpers from MachObjectWriter
were reused too.

llvm-svn: 246673

show more ...


Revision tags: llvmorg-3.7.0, llvmorg-3.7.0-rc4
# fae69e6d 26-Aug-2015 Frederic Riss <[email protected]>

[dsymutil] Emit real dSYM companion binaries.

The binaries containing the linked DWARF generated by dsymutil are not
standard relocatable object files like emitted did previsously. They should be
dS

[dsymutil] Emit real dSYM companion binaries.

The binaries containing the linked DWARF generated by dsymutil are not
standard relocatable object files like emitted did previsously. They should be
dSYM companion files, which means they have a different file type in the
header, but also a couple other peculiarities:
- they contain the segments and sections from the original binary in their
load commands, but not the actual contents. This means they get an address
and a size, but their offset is always 0 (but these are not virtual sections)
- they also conatin all the defined symbols from the original binary

This makes MC a really bad fit to emit these kind of binaries. The approach
that was used in this patch is to leverage MC's section layout for the
debug sections, but to use a replacement for MachObjectWriter that lives
in MachOUtils.cpp. Some of the low-level helpers from MachObjectWriter
were reused too.

llvm-svn: 246012

show more ...