diff options
Diffstat (limited to 'lld/docs/ld.lld.1')
| -rw-r--r-- | lld/docs/ld.lld.1 | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/lld/docs/ld.lld.1 b/lld/docs/ld.lld.1 index 1746ae9f5fd4..92d67b17e24e 100644 --- a/lld/docs/ld.lld.1 +++ b/lld/docs/ld.lld.1 @@ -123,6 +123,11 @@ may be .Cm none or .Cm zlib . +The default compression level is 1 (fastest) as the debug info usually +compresses well at that level, but if you want to compress it more, +you can specify +.Fl O2 +to set the compression level to 6. .It Fl -cref Output cross reference table. .It Fl -define-common , Fl d @@ -191,8 +196,6 @@ Set the field to the specified value. .It Fl -fini Ns = Ns Ar symbol Specify a finalizer function. -.It Fl -force-bti -Force enable AArch64 BTI instruction in PLT, warn if Input ELF file does not have GNU_PROPERTY_AARCH64_FEATURE_1_BTI property. .It Fl -format Ns = Ns Ar input-format , Fl b Ar input-format Specify the format of the inputs following this option. .Ar input-format @@ -332,7 +335,9 @@ Disable string merging. .It Cm 1 Enable string merging. .It Cm 2 -Enable string tail merging. +Enable string tail merging. If +.Fl -compress-debug-sections +is given, compress debug sections at compression level 6 instead of 1. .El .Pp .Fl O Ns Cm 1 @@ -401,8 +406,6 @@ If .Fl -use-android-relr-tags is specified, use SHT_ANDROID_RELR instead of SHT_RELR. .Pp -.It Fl -pac-plt -AArch64 only, use pointer authentication in PLT. .It Fl -pic-veneer Always generate position independent thunks. .It Fl -pie , Fl -pic-executable @@ -599,6 +602,13 @@ Stack permissions are recorded in the .Dv PT_GNU_STACK segment. .Pp +.It Cm force-bti +Force enable AArch64 BTI instruction in PLT, warn if Input ELF file does not have GNU_PROPERTY_AARCH64_FEATURE_1_BTI property. +.Pp +.It Cm force-ibt +Force enable Intel Indirect Branch Tracking in PLT, warn if an input ELF file +does not have GNU_PROPERTY_X86_FEATURE_1_IBT property. +.Pp .It Cm global Sets the .Dv DF_1_GLOBAL flag in the @@ -655,8 +665,13 @@ Set the flag to indicate that the object may not be opened by .Xr dlopen 3 . .Pp +.It Cm nognustack +Do not emit the +.Dv PT_GNU_STACK +segment. +.Pp .It Cm norelro -Do not indicate that portions of the object shold be mapped read-only +Do not indicate that portions of the object should be mapped read-only after initial relocation processing. The object will omit the .Dv PT_GNU_RELRO @@ -683,6 +698,9 @@ flag to indicate that the object requires $ORIGIN processing. .Pp +.It Cm pac-plt +AArch64 only, use pointer authentication in PLT. +.Pp .It Cm retpolineplt Emit retpoline format PLT entries as a mitigation for CVE-2017-5715. .Pp @@ -705,6 +723,9 @@ allows overlap between two executable segments, or two non-executable segments. .Cm separate-loadable-segments disallows overlap. .Pp +.It Cm shstk +x86 only, use shadow stack. +.Pp .It Cm stack-size Ns = Ns Ar size Set the main thread's stack size to .Ar size . |