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From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Subject: [PATCH] Allow the kernel to start earlier than VM_MAX_ADDRESS
A bit hackish.
---
sysdeps/mach/hurd/dl-sysdep.c | 26 ++++++++++++++++++++------
1 file changed, 20 insertions(+), 6 deletions(-)
--- a/sysdeps/mach/hurd/dl-sysdep.c
+++ b/sysdeps/mach/hurd/dl-sysdep.c
@@ -87,12 +87,28 @@ static void fmh(void) {
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);}
+ if (!fmha)
+ fmhs=0;
+ else
+ while (1) {
+ fmhs=max-fmha;
+ if (fmhs == 0)
+ break;
+ err = __vm_map (__mach_task_self (),
+ &fmha, fmhs, 0, 0, MACH_PORT_NULL, 0, 1,
+ VM_PROT_NONE, VM_PROT_NONE, VM_INHERIT_COPY);
+ if (!err)
+ break;
+ if (err != KERN_INVALID_ADDRESS && err != KERN_NO_SPACE)
+ assert_perror(err);
+ vm_address_t new_max = (max - 1) & 0xf0000000U;
+ if (new_max >= max) {
+ fmhs = 0;
+ fmha = 0;
+ break;
+ }
+ max = new_max;
+ }
}
/* XXX loser kludge for vm_map kernel bug */
#endif
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