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Edit File: tg-bigmem.diff
From: Samuel Thibault <samuel.thibault@ens-lyon.org> Subject: [PATCH] Allow the kernel to start earlier than VM_MAX_ADDRESS VM_MAX_ADDRESS shouldn't be hardcoded in libc, the kernel should be able to decide about it dynamically. This fixes glibc into supporting that. It's however 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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