| Index: src/cmd/dist/buildruntime.c |
| =================================================================== |
| --- a/src/cmd/dist/buildruntime.c |
| +++ b/src/cmd/dist/buildruntime.c |
| @@ -133,12 +133,17 @@ |
| "// which is where these macros come into play.\n" |
| "// get_tls sets up the temporary and then g and r use it.\n" |
| "//\n" |
| - "// The final wrinkle is that get_tls needs to read from %gs:0,\n" |
| + "// Another wrinkle is that get_tls needs to read from %gs:0,\n" |
| "// but in 8l input it's called 8(GS), because 8l is going to\n" |
| "// subtract 8 from all the offsets, as described above.\n" |
| + "//\n" |
| + "// The final wrinkle is that when generating an ELF .o file for\n" |
| + "// external linking mode, we need to be able to relocate the\n" |
| + "// -8(r) and -4(r) instructions. Tag them with an extra (GS*1)\n" |
| + "// that is ignored by the linker except for that identification.\n" |
| "#define get_tls(r) MOVL 8(GS), r\n" |
| - "#define g(r) -8(r)\n" |
| - "#define m(r) -4(r)\n" |
| + "#define g(r) -8(r)(GS*1)\n" |
| + "#define m(r) -4(r)(GS*1)\n" |
| }, |
| {"386", "", |
| "#define get_tls(r)\n" |
