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Rui Ueyama 2021-06-15 17:11:45 +09:00
parent 0280c39bc8
commit 1317132548
1 changed files with 35 additions and 10 deletions
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docs/mold.1
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@ -431,11 +431,11 @@ Remove unreferenced sections
.IP "\fB\-\-hash\-style\fR=[\fIsysv\fR,\fIgnu\fR,\fIboth\fR]"
Set hash style
.IP "\fB\-\-icf\fR"
.IP "\fB\-\-icf=all\fR"
.PD 0
.IP "\fB\-\-no\-icf\fR"
.PD
Fold identical code
Fold identical code.
.IP "\fB\-\-image\-base\fR=\fIaddr\fR"
Set the base address to \fIaddr\fR
@ -575,21 +575,46 @@ original symbol can be resolved as \fB__real_\fIsymbol\fR. This
option is typically used for wrapping an existing function.
.IP "\fB\-z now\fR"
Disable lazy function resolution
.PD 0
.IP "\fB\-z lazy\fR"
Enable lazy function resolution (default)
.PD
By default, functions referring other ELF modules are resolved by the
dynamic linker when they are called for the first time. \fB\-z now\fR
marks an executable or a shared library file so that all dynamic
symbols are loaded when a file is loaded to memory. \fB\-z lazy\fR
restores the default behavior.
.IP "\fB\-z execstack\fR"
Require executable stack
.PD 0
.IP "\fB\-z noexecstack\fR"
Do not require executable stack (default)
.PD
By default, the pages for the stack area (i.e. the pages where local
variables reside) are not executable for security reasons. \fB\-z
execstack\fR makes it executable. \fB\-z noexecstack\fR restores the
default behavior.
.IP "\fB\-z relro\fR"
Make some sections read-only after relocation (default)
.PD 0
.IP "\fB\-z norelro\fR"
Do not use relro
.PD
Some sections such as \fB.dynamic\fR have to be writable only during
an executable or a shared library file is being loaded to memory.
Once the dynamic linker finishes its job, such sections won't be
mutated by anyone. As a security mitigation, it is preferred to make
such segments read-only during program execution.
\fB\-z relro\fR puts such sections into a special section called
\fIrelro\fR. The dynamic linker make a relro segment read-only
after it finishes its job.
By default, \fBmold\fR generates a relro segment. \fB\-z
norelro\fR disables the feature.
.IP "\fB\-z defs\fR"
Report undefined symbols (even with \fI\-\-shared\fR)
.PD 0
.IP "\fB\-z nodefs\fR"
Do not report undefined symbols
.PD
Report undefined symbols (even with \fI\-\-shared\fR)
.IP "\fB\-z nodlopen\fR"
Mark DSO not available to dlopen
.IP "\fB\-z nodelete\fR"