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| author | peter <peter@FreeBSD.org> | 2001-08-24 08:53:30 +0000 |
|---|---|---|
| committer | peter <peter@FreeBSD.org> | 2001-08-24 08:53:30 +0000 |
| commit | 89bd0a43383b1b10e21cfba74c7bf109b71a62f1 (patch) | |
| tree | e650d445aa765ce562c70af08ad2a6b61144525d /lib/libkvm/kvm_i386.c | |
| parent | ef6d8b9ba17818a35b10d11baed552a605621266 (diff) | |
| download | FreeBSD-src-89bd0a43383b1b10e21cfba74c7bf109b71a62f1.zip FreeBSD-src-89bd0a43383b1b10e21cfba74c7bf109b71a62f1.tar.gz | |
Dynamically adjust to the value of KERNBASE in a crashdump, with
a fallback for old kernels without the "kernbase" symbol.
Diffstat (limited to 'lib/libkvm/kvm_i386.c')
| -rw-r--r-- | lib/libkvm/kvm_i386.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/lib/libkvm/kvm_i386.c b/lib/libkvm/kvm_i386.c index b4365ae..5801e0c 100644 --- a/lib/libkvm/kvm_i386.c +++ b/lib/libkvm/kvm_i386.c @@ -93,6 +93,7 @@ _kvm_initvtop(kvm_t *kd) struct vmstate *vm; struct nlist nlist[2]; u_long pa; + u_long kernbase; pd_entry_t *PTD; vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm)); @@ -103,14 +104,23 @@ _kvm_initvtop(kvm_t *kd) kd->vmst = vm; vm->PTD = 0; - nlist[0].n_name = "_IdlePTD"; + nlist[0].n_name = "kernbase"; + nlist[1].n_name = 0; + + if (kvm_nlist(kd, nlist) != 0) + kernbase = KERNBASE; /* for old kernels */ + else + kernbase = nlist[0].n_value; + + nlist[0].n_name = "IdlePTD"; nlist[1].n_name = 0; if (kvm_nlist(kd, nlist) != 0) { _kvm_err(kd, kd->program, "bad namelist"); return (-1); } - if (kvm_read(kd, (nlist[0].n_value - KERNBASE), &pa, sizeof(pa)) != sizeof(pa)) { + if (kvm_read(kd, (nlist[0].n_value - kernbase), &pa, sizeof(pa)) != + sizeof(pa)) { _kvm_err(kd, kd->program, "cannot read IdlePTD"); return (-1); } |
