diff options
Diffstat (limited to 'src/cmd/internal/obj/link.go')
| -rw-r--r-- | src/cmd/internal/obj/link.go | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/cmd/internal/obj/link.go b/src/cmd/internal/obj/link.go index a5d622a70a..6066493baf 100644 --- a/src/cmd/internal/obj/link.go +++ b/src/cmd/internal/obj/link.go @@ -334,6 +334,7 @@ const ( Sxxx = iota STEXT SELFRXSECT + STYPE SSTRING SGOSTRING @@ -341,6 +342,25 @@ const ( SGCBITS SRODATA SFUNCTAB + + // Types STYPE-SFUNCTAB above are written to the .rodata section by default. + // When linking a shared object, some conceptually "read only" types need to + // be written to by relocations and putting them in a section called + // ".rodata" interacts poorly with the system linkers. The GNU linkers + // support this situation by arranging for sections of the name + // ".data.rel.ro.XXX" to be mprotected read only by the dynamic linker after + // relocations have applied, so when the Go linker is creating a shared + // object it checks all objects of the above types and bumps any object that + // has a relocation to it to the corresponding type below, which are then + // written to sections with appropriate magic names. + STYPERELRO + SSTRINGRELRO + SGOSTRINGRELRO + SGOFUNCRELRO + SGCBITSRELRO + SRODATARELRO + SFUNCTABRELRO + STYPELINK SSYMTAB SPCLNTAB |