[Crash-utility] [PATCH v1 09/10] LoongArch64: Add "--kaslr" command line option support
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(a)loongson.cn>
Signed-off-by: Youling Tang <tangyouling(a)loongson.cn>
Signed-off-by: Ming Wang <wangming01(a)loongson.cn>
---
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 0c6e595..d933e66 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;
--
2.34.1