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6l: move mapped symbol table lower in memory

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Allows binary to run on some Linux system.

Fix for issue 365.

R=rsc
CC=golang-dev
https://golang.org/cl/199096
This commit is contained in:
Andrew Gerrand 2010-02-04 12:46:11 -08:00
parent 36cd49e318
commit 8ec9ffc742
4 changed files with 6 additions and 8 deletions
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2
src/cmd/5l/asm.c
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@ -68,7 +68,7 @@ asmb(void)
int np; int np;
vlong va, fo, w, symo; vlong va, fo, w, symo;
int strtabsize; int strtabsize;
vlong symdatva = 0x99LL<<24; vlong symdatva = SYMDATVA;
Optab *o; Optab *o;
strtabsize = 0; strtabsize = 0;

2
src/cmd/6l/asm.c
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@ -439,7 +439,7 @@ asmb(void)
int a, dynsym; int a, dynsym;
uchar *op1; uchar *op1;
vlong vl, va, startva, fo, w, symo, elfsymo, elfstro, elfsymsize, machlink; vlong vl, va, startva, fo, w, symo, elfsymo, elfstro, elfsymsize, machlink;
vlong symdatva = 0x99LL<<32; vlong symdatva = SYMDATVA;
ElfEhdr *eh; ElfEhdr *eh;
ElfPhdr *ph, *pph; ElfPhdr *ph, *pph;
ElfShdr *sh; ElfShdr *sh;

3
src/cmd/ld/lib.h
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@ -28,6 +28,9 @@
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE. // THE SOFTWARE.
// This magic number also defined in src/pkg/runtime/symtab.c in SYMCOUNTS
#define SYMDATVA 0x99LL<<24
typedef struct Library Library; typedef struct Library Library;
struct Library struct Library
{ {

7
src/pkg/runtime/symtab.c
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@ -18,13 +18,8 @@
// TODO(rsc): Move this *under* the text segment. // TODO(rsc): Move this *under* the text segment.
// Then define names for these addresses instead of hard-coding magic ones. // Then define names for these addresses instead of hard-coding magic ones.
#ifdef _64BIT #define SYMCOUNTS ((int32*)(0x99LL<<24)) // known to 6l, 8l; see src/cmd/ld/lib.h
#define SYMCOUNTS ((int32*)(0x99LL<<32)) // known to 6l
#define SYMDATA ((byte*)(0x99LL<<32) + 8)
#else
#define SYMCOUNTS ((int32*)(0x99LL<<24)) // known to 8l
#define SYMDATA ((byte*)(0x99LL<<24) + 8) #define SYMDATA ((byte*)(0x99LL<<24) + 8)
#endif
typedef struct Sym Sym; typedef struct Sym Sym;
struct Sym struct Sym