Apply initial changes to support kernel address space layout
randomization (KASLR) for loongarch64. This is the minimal patch
required to process loongarch64 dumps for the kernels configured
with CONFIG_RANDOMIZE_BASE(CONFIG_RELOCATABLE), and to accept the
"--kaslr" command line option. Only dumpfiles whose headers contain
kernel VMCOREINFO data are supported.
Example:
crash vmcore vmlinux --kaslr auto
Co-developed-by: Youling Tang <tangyouling@xxxxxxxxxxx>
Signed-off-by: Youling Tang <tangyouling@xxxxxxxxxxx>
Signed-off-by: Ming Wang <wangming01@xxxxxxxxxxx>
---
crash.8 | 2 +-
help.c | 9 +++++----
main.c | 3 ++-
symbols.c | 10 ++++++----
4 files changed, 14 insertions(+), 10 deletions(-)
diff --git a/crash.8 b/crash.8
index e553a0b..0662f92 100644
--- a/crash.8
+++ b/crash.8
@@ -491,7 +491,7 @@ Search for the kernel source code in directory instead of in the
standard location that is compiled into the debuginfo data.
.TP
.BI --kaslr \ offset | auto
-If an x86_64 kernel was configured with
+If an x86, x86_64, s390x or loongarch64 kernel was configured with
.B CONFIG_RANDOMIZE_BASE,
the offset value is equal to the difference between the symbol values
compiled into the vmlinux file and their relocated KASLR values. If set to
diff --git a/help.c b/help.c
index cc7ab20..d5d9dd1 100644
--- a/help.c
+++ b/help.c
@@ -336,10 +336,11 @@ char *program_usage_info[] = {
" and verification. The default count is 32768.",
"",
" --kaslr offset | auto",
- " If x86, x86_64 or s390x kernel was configured with CONFIG_RANDOMIZE_BASE,",
- " the offset value is equal to the difference between the symbol values ",
- " compiled into the vmlinux file and their relocated KASLR value. If",
- " set to auto, the KASLR offset value will be automatically calculated.",
+ " If x86, x86_64, s390x or loongarch64 kernel was configured with",
+ " CONFIG_RANDOMIZE_BASE, the offset value is equal to the difference",
+ " between the symbol values compiled into the vmlinux file and their",
+ " relocated KASLR value. If set to auto, the KASLR offset value will",
+ " be automatically calculated.",
"",
" --minimal",
" Bring up a session that is restricted to the log, dis, rd, sym,",
diff --git a/main.c b/main.c
index 4fd4ca5..0b6b927 100644
--- a/main.c
+++ b/main.c
@@ -228,7 +228,8 @@ main(int argc, char **argv)
} else if (STREQ(long_options[option_index].name, "kaslr")) {
if (!machine_type("X86_64") &&
!machine_type("ARM64") && !machine_type("X86") &&
- !machine_type("S390X") && !machine_type("RISCV64"))
+ !machine_type("S390X") && !machine_type("RISCV64") &&
++ !machine_type("LOONGARCH64"))
error(INFO, "--kaslr not valid "
"with this machine type.\n");
else if (STREQ(optarg, "auto"))
diff --git a/symbols.c b/symbols.c
index e1a3457..b1ba0fd 100644
--- a/symbols.c
+++ b/symbols.c
@@ -629,7 +629,8 @@ kaslr_init(void)
char *string;
if ((!machine_type("X86_64") && !machine_type("ARM64") && !machine_type("X86") &&
- !machine_type("S390X") && !machine_type("RISCV64")) || (kt->flags & RELOC_SET))
+ !machine_type("S390X") && !machine_type("RISCV64") && !machine_type("LOONGARCH64")) ||
+ (kt->flags & RELOC_SET))
return;
if (!kt->vmcoreinfo._stext_SYMBOL &&
@@ -794,8 +795,8 @@ store_symbols(bfd *abfd, int dynamic, void *minisyms, long symcount,
fromend, size, store);
} else if (!(kt->flags & RELOC_SET))
kt->flags |= RELOC_FORCE;
- } else if (machine_type("X86_64") || machine_type("ARM64") ||
- machine_type("S390X") || machine_type("RISCV64")) {
+ } else if (machine_type("X86_64") || machine_type("ARM64") || machine_type("S390X") ||
+ machine_type("RISCV64") || machine_type("LOONGARCH64")) {
if ((kt->flags2 & RELOC_AUTO) && !(kt->flags & RELOC_SET))
derive_kaslr_offset(abfd, dynamic, from,
fromend, size, store);
@@ -867,7 +868,8 @@ store_sysmap_symbols(void)
strerror(errno));
if (!machine_type("X86") && !machine_type("X86_64") &&
- !machine_type("ARM64") && !machine_type("S390X"))
+ !machine_type("ARM64") && !machine_type("S390X") &&
+ !machine_type("LOONGARCH64"))
kt->flags &= ~RELOC_SET;
first = 0;
--
2.39.2
--
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