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hurd: Drop fmh kludge

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Gnumach's 0650a4ee30e3 implements support for high bits being set in the
mask parameter of vm_map. This allows to remove the fmh kludge that was
masking away the address range by mapping a dumb area there.
This commit is contained in:
Samuel Thibault 2021-08-16 11:20:38 +02:00
parent 6e8a0aac2f
commit cbb2aa337b
1 changed files with 0 additions and 35 deletions
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35
sysdeps/mach/hurd/dl-sysdep.c
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@ -66,37 +66,6 @@ void *_dl_random attribute_relro = NULL;
struct hurd_startup_data *_dl_hurd_data;
#define FMH defined(__i386__)
#if ! FMH
# define fmh() ((void)0)
# define unfmh() ((void)0)
#else
/* XXX loser kludge for vm_map kernel bug, fixed by gnumach's 0650a4ee30e3 */
#undef ELF_MACHINE_USER_ADDRESS_MASK
#define ELF_MACHINE_USER_ADDRESS_MASK 0
static vm_address_t fmha;
static vm_size_t fmhs;
static void unfmh(void){
__vm_deallocate(__mach_task_self(),fmha,fmhs);}
static void fmh(void) {
error_t err;int x;vm_offset_t o;mach_port_t p;
vm_address_t a=0x08000000U,max=VM_MAX_ADDRESS;
while (!(err=__vm_region(__mach_task_self(),&a,&fmhs,&x,&x,&x,&x,&p,&o))){
__mach_port_deallocate(__mach_task_self(),p);
if (a+fmhs>=0x80000000U){
max=a; break;}
fmha=a+=fmhs;}
if (err) assert(err==KERN_NO_SPACE);
if (!fmha)fmhs=0;else{
fmhs=max-fmha;
err = __vm_map (__mach_task_self (),
&fmha, fmhs, 0, 0, MACH_PORT_NULL, 0, 1,
VM_PROT_NONE, VM_PROT_NONE, VM_INHERIT_COPY);
assert_perror(err);}
}
/* XXX loser kludge for vm_map kernel bug */
#endif
ElfW(Addr)
_dl_sysdep_start (void **start_argptr,
@ -147,8 +116,6 @@ _dl_sysdep_start (void **start_argptr,
&& _dl_hurd_data->user_entry == 0)
_dl_hurd_data->user_entry = (vm_address_t) ENTRY_POINT;
unfmh(); /* XXX */
#if 0 /* XXX make this work for real someday... */
if (_dl_hurd_data->user_entry == (vm_address_t) ENTRY_POINT)
/* We were invoked as a command, not as the program interpreter.
@ -257,8 +224,6 @@ unfmh(); /* XXX */
/* Initialize frequently used global variable. */
GLRO(dl_pagesize) = __getpagesize ();
fmh(); /* XXX */
/* See hurd/hurdstartup.c; this deals with getting information
from the exec server and slicing up the arguments.
Then it will call `go', above. */