Author: bdragon
Date: Wed Sep 23 02:11:24 2020
New Revision: 366055
URL: https://svnweb.freebsd.org/changeset/base/366055
Log:
[PowerPC64LE] libkvm powerpc64le support.
* Add missing _kvm16toh() function.
* Teach libkvm about powerpc64le.
Sponsored by: Tag1 Consulting, Inc.
Modified:
head/lib/libkvm/kvm_powerpc64.c
head/lib/libkvm/kvm_private.h
Modified: head/lib/libkvm/kvm_powerpc64.c
==============================================================================
--- head/lib/libkvm/kvm_powerpc64.c Wed Sep 23 02:05:44 2020
(r366054)
+++ head/lib/libkvm/kvm_powerpc64.c Wed Sep 23 02:11:24 2020
(r366055)
@@ -53,22 +53,23 @@ struct vmstate {
};
static int
-valid_elf_header(Elf64_Ehdr *eh)
+valid_elf_header(kvm_t *kd, Elf64_Ehdr *eh)
{
if (!IS_ELF(*eh))
return (0);
if (eh->e_ident[EI_CLASS] != ELFCLASS64)
return (0);
- if (eh->e_ident[EI_DATA] != ELFDATA2MSB)
+ if (eh->e_ident[EI_DATA] != ELFDATA2MSB &&
+ eh->e_ident[EI_DATA] != ELFDATA2LSB)
return (0);
if (eh->e_ident[EI_VERSION] != EV_CURRENT)
return (0);
if (eh->e_ident[EI_OSABI] != ELFOSABI_STANDALONE)
return (0);
- if (be16toh(eh->e_type) != ET_CORE)
+ if (_kvm16toh(kd, eh->e_type) != ET_CORE)
return (0);
- if (be16toh(eh->e_machine) != EM_PPC64)
+ if (_kvm16toh(kd, eh->e_machine) != EM_PPC64)
return (0);
/* Can't think of anything else to check... */
return (1);
@@ -80,7 +81,8 @@ dump_header_size(struct kerneldumpheader *dh)
if (strcmp(dh->magic, KERNELDUMPMAGIC) != 0)
return (0);
- if (strcmp(dh->architecture, "powerpc64") != 0)
+ if (strcmp(dh->architecture, "powerpc64") != 0 &&
+ strcmp(dh->architecture, "powerpc64le") != 0)
return (0);
/* That should do it... */
return (sizeof(*dh));
@@ -107,7 +109,7 @@ powerpc_maphdrs(kvm_t *kd)
}
vm->dmphdrsz = 0;
vm->eh = vm->map;
- if (!valid_elf_header(vm->eh)) {
+ if (!valid_elf_header(kd, vm->eh)) {
/*
* Hmmm, no ELF header. Maybe we still have a dump header.
* This is normal when the core file wasn't created by
@@ -118,11 +120,11 @@ powerpc_maphdrs(kvm_t *kd)
if (vm->dmphdrsz == 0)
goto inval;
vm->eh = (void *)((uintptr_t)vm->map + vm->dmphdrsz);
- if (!valid_elf_header(vm->eh))
+ if (!valid_elf_header(kd, vm->eh))
goto inval;
}
- mapsz = be16toh(vm->eh->e_phentsize) * be16toh(vm->eh->e_phnum) +
- be64toh(vm->eh->e_phoff);
+ mapsz = _kvm16toh(kd, vm->eh->e_phentsize) *
+ _kvm16toh(kd, vm->eh->e_phnum) + _kvm64toh(kd, vm->eh->e_phoff);
munmap(vm->map, vm->mapsz);
/* Map all headers. */
@@ -134,7 +136,7 @@ powerpc_maphdrs(kvm_t *kd)
}
vm->eh = (void *)((uintptr_t)vm->map + vm->dmphdrsz);
vm->ph = (void *)((uintptr_t)vm->eh +
- (uintptr_t)be64toh(vm->eh->e_phoff));
+ (uintptr_t)_kvm64toh(kd, vm->eh->e_phoff));
return (0);
inval:
@@ -155,19 +157,21 @@ powerpc64_va2off(kvm_t *kd, kvaddr_t va, off_t *ofs)
int nph;
ph = vm->ph;
- nph = be16toh(vm->eh->e_phnum);
- while (nph && (va < be64toh(ph->p_vaddr) ||
- va >= be64toh(ph->p_vaddr) + be64toh(ph->p_memsz))) {
+ nph = _kvm16toh(kd, vm->eh->e_phnum);
+ while (nph && (va < _kvm64toh(kd, ph->p_vaddr) ||
+ va >= _kvm64toh(kd, ph->p_vaddr) + _kvm64toh(kd, ph->p_memsz))) {
nph--;
- ph = (void *)((uintptr_t)ph + be16toh(vm->eh->e_phentsize));
+ ph = (void *)((uintptr_t)ph +
+ _kvm16toh(kd, vm->eh->e_phentsize));
}
if (nph == 0)
return (0);
/* Segment found. Return file offset and range. */
- *ofs = vm->dmphdrsz + be64toh(ph->p_offset) +
- (va - be64toh(ph->p_vaddr));
- return (be64toh(ph->p_memsz) - (va - be64toh(ph->p_vaddr)));
+ *ofs = vm->dmphdrsz + _kvm64toh(kd, ph->p_offset) +
+ (va - _kvm64toh(kd, ph->p_vaddr));
+ return (_kvm64toh(kd, ph->p_memsz) -
+ (va - _kvm64toh(kd, ph->p_vaddr)));
}
static void
@@ -190,6 +194,14 @@ _powerpc64_probe(kvm_t *kd)
}
static int
+_powerpc64le_probe(kvm_t *kd)
+{
+
+ return (_kvm_probe_elf_kernel(kd, ELFCLASS64, EM_PPC64) &&
+ kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB);
+}
+
+static int
_powerpc64_initvtop(kvm_t *kd)
{
@@ -209,7 +221,7 @@ _powerpc64_kvatop(kvm_t *kd, kvaddr_t va, off_t *ofs)
struct vmstate *vm;
vm = kd->vmst;
- if (be64toh(vm->ph->p_paddr) == 0xffffffffffffffff)
+ if (_kvm64toh(kd, vm->ph->p_paddr) == 0xffffffffffffffff)
return ((int)powerpc64_va2off(kd, va, ofs));
_kvm_err(kd, kd->program, "Raw corefile not supported");
@@ -220,13 +232,24 @@ static int
_powerpc64_native(kvm_t *kd __unused)
{
-#ifdef __powerpc64__
+#if defined(__powerpc64__) && BYTE_ORDER == BIG_ENDIAN
return (1);
#else
return (0);
#endif
}
+static int
+_powerpc64le_native(kvm_t *kd __unused)
+{
+
+#if defined(__powerpc64__) && BYTE_ORDER == LITTLE_ENDIAN
+ return (1);
+#else
+ return (0);
+#endif
+}
+
static struct kvm_arch kvm_powerpc64 = {
.ka_probe = _powerpc64_probe,
.ka_initvtop = _powerpc64_initvtop,
@@ -235,4 +258,13 @@ static struct kvm_arch kvm_powerpc64 = {
.ka_native = _powerpc64_native,
};
+static struct kvm_arch kvm_powerpc64le = {
+ .ka_probe = _powerpc64le_probe,
+ .ka_initvtop = _powerpc64_initvtop,
+ .ka_freevtop = _powerpc64_freevtop,
+ .ka_kvatop = _powerpc64_kvatop,
+ .ka_native = _powerpc64le_native,
+};
+
KVM_ARCH(kvm_powerpc64);
+KVM_ARCH(kvm_powerpc64le);
Modified: head/lib/libkvm/kvm_private.h
==============================================================================
--- head/lib/libkvm/kvm_private.h Wed Sep 23 02:05:44 2020
(r366054)
+++ head/lib/libkvm/kvm_private.h Wed Sep 23 02:11:24 2020
(r366055)
@@ -134,6 +134,16 @@ struct kvm_bitmap {
/*
* Functions used internally by kvm, but across kvm modules.
*/
+static inline uint16_t
+_kvm16toh(kvm_t *kd, uint16_t val)
+{
+
+ if (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB)
+ return (le16toh(val));
+ else
+ return (be16toh(val));
+}
+
static inline uint32_t
_kvm32toh(kvm_t *kd, uint32_t val)
{
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