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[ELF] - Make LLD accept Ttext-segment X/Ttext-segment=X aliases for -Ttext. 

It os used in work/emulators/qemu-user-static port.
Which tries to use -Ttext-segment and then:

# In case ld does not support -Ttext-segment, edit the default linker
# script via sed to set the .text start addr.  This is needed on FreeBSD
# at least.
<here it calls -verbose to extract and edit default bfd linker script.>

Actually now we are do not fully support -Ttext properly (see D27613),
but we also seems never will provide anything close to default script, like bfd do,
so at least this patch introduces proper alias handling.

llvm-svn: 289827
This commit is contained in:
George Rimar 2016-12-15 16:12:34 +00:00
parent 0ca1987977
commit 6cbfce7785
2 changed files with 8 additions and 0 deletions
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2
lld/ELF/Options.td
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@ -283,6 +283,8 @@ def alias_Tdata: J<"Tdata=">, Alias<Tdata>;
def alias_trace: Flag<["-"], "t">, Alias<trace>;
def alias_trace_symbol_y : JoinedOrSeparate<["-"], "y">, Alias<trace_symbol>;
def alias_Ttext: J<"Ttext=">, Alias<Ttext>;
def alias_Ttext_segment: S<"Ttext-segment">, Alias<Ttext>;
def alias_Ttext_segment_eq: J<"Ttext-segment=">, Alias<Ttext>;
def alias_undefined_eq: J<"undefined=">, Alias<undefined>;
def alias_undefined_u: JoinedOrSeparate<["-"], "u">, Alias<undefined>;
def alias_version_V: Flag<["-"], "V">, Alias<version>;

6
lld/test/ELF/sectionstart.s
View File

@ -20,6 +20,12 @@
# RUN: ld.lld %t.o -Ttext=0x100000 -Tdata=0x110000 -Tbss=0x200000 -o %t4
# RUN: llvm-objdump -section-headers %t4 | FileCheck %s
## Check Ttext-segment X and Ttext-segment=X forms.
# RUN: ld.lld %t.o -Ttext-segment=0x100000 -Tdata=0x110000 -Tbss=0x200000 -o %t4
# RUN: llvm-objdump -section-headers %t4 | FileCheck %s
# RUN: ld.lld %t.o -Ttext-segment 0x100000 -Tdata=0x110000 -Tbss=0x200000 -o %t4
# RUN: llvm-objdump -section-headers %t4 | FileCheck %s
## The same, but dropped "0x" prefix.
# RUN: ld.lld %t.o -Ttext=100000 -Tdata=110000 -Tbss=200000 -o %t5
# RUN: llvm-objdump -section-headers %t5 | FileCheck %s