select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
select ARCH_HAS_PTE_DEVMAP
select ARCH_HAS_PTE_SPECIAL
+ select ARCH_HAS_SET_MEMORY
+ select ARCH_HAS_SET_DIRECT_MAP
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_INLINE_READ_LOCK if !PREEMPTION
select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION
select GENERIC_CMOS_UPDATE
select GENERIC_CPU_AUTOPROBE
select GENERIC_CPU_DEVICES
+ select GENERIC_CPU_VULNERABILITIES
select GENERIC_ENTRY
select GENERIC_GETTIMEOFDAY
select GENERIC_IOREMAP if !ARCH_IOREMAP
select HAVE_LIVEPATCH
select HAVE_MOD_ARCH_SPECIFIC
select HAVE_NMI
- select HAVE_OBJTOOL if AS_HAS_EXPLICIT_RELOCS && AS_HAS_THIN_ADD_SUB && !CC_IS_CLANG
+ select HAVE_OBJTOOL if AS_HAS_EXPLICIT_RELOCS && AS_HAS_THIN_ADD_SUB
select HAVE_PCI
select HAVE_PERF_EVENTS
select HAVE_PERF_REGS
select TRACE_IRQFLAGS_SUPPORT
select USE_PERCPU_NUMA_NODE_ID
select USER_STACKTRACE_SUPPORT
+ select VDSO_GETRANDOM
select ZONE_DMA32
config 32BIT
def_bool $(as-instr,movfcsr2gr \$t0$(comma)\$fcsr0)
config AS_HAS_THIN_ADD_SUB
- def_bool $(cc-option,-Wa$(comma)-mthin-add-sub)
+ def_bool $(cc-option,-Wa$(comma)-mthin-add-sub) || AS_IS_LLVM
config AS_HAS_LSX_EXTENSION
def_bool $(as-instr,vld \$vr0$(comma)\$a0$(comma)0)
#define LOONGARCH_CPUCFG1 0x1
#define CPUCFG1_ISGR32 BIT(0)
#define CPUCFG1_ISGR64 BIT(1)
+ #define CPUCFG1_ISA GENMASK(1, 0)
#define CPUCFG1_PAGING BIT(2)
#define CPUCFG1_IOCSR BIT(3)
#define CPUCFG1_PABITS GENMASK(11, 4)
#define CPUCFG6_PMP BIT(0)
#define CPUCFG6_PAMVER GENMASK(3, 1)
#define CPUCFG6_PMNUM GENMASK(7, 4)
+#define CPUCFG6_PMNUM_SHIFT 4
#define CPUCFG6_PMBITS GENMASK(13, 8)
#define CPUCFG6_UPM BIT(14)
/*
* CPUCFG index area: 0x40000000 -- 0x400000ff
- * SW emulation for KVM hypervirsor
+ * SW emulation for KVM hypervirsor, see arch/loongarch/include/uapi/asm/kvm_para.h
*/
-#define CPUCFG_KVM_BASE 0x40000000
-#define CPUCFG_KVM_SIZE 0x100
-
-#define CPUCFG_KVM_SIG (CPUCFG_KVM_BASE + 0)
-#define KVM_SIGNATURE "KVM\0"
-#define CPUCFG_KVM_FEATURE (CPUCFG_KVM_BASE + 4)
-#define KVM_FEATURE_IPI BIT(1)
-#define KVM_FEATURE_STEAL_TIME BIT(2)
#ifndef __ASSEMBLY__
return (is_static_jump(insn) && insn_call_dest(insn));
}
+/*
+ * Checks if a string ends with another.
+ */
+static bool str_ends_with(const char *s, const char *sub)
+{
+ const int slen = strlen(s);
+ const int sublen = strlen(sub);
+
+ if (sublen > slen)
+ return 0;
+
+ return !memcmp(s + slen - sublen, sub, sublen);
+}
+
+/*
+ * Checks if a function is a Rust "noreturn" one.
+ */
+static bool is_rust_noreturn(const struct symbol *func)
+{
+ /*
+ * If it does not start with "_R", then it is not a Rust symbol.
+ */
+ if (strncmp(func->name, "_R", 2))
+ return false;
+
+ /*
+ * These are just heuristics -- we do not control the precise symbol
+ * name, due to the crate disambiguators (which depend on the compiler)
+ * as well as changes to the source code itself between versions (since
+ * these come from the Rust standard library).
+ */
+ return str_ends_with(func->name, "_4core5sliceSp15copy_from_slice17len_mismatch_fail") ||
+ str_ends_with(func->name, "_4core6option13unwrap_failed") ||
+ str_ends_with(func->name, "_4core6result13unwrap_failed") ||
+ str_ends_with(func->name, "_4core9panicking5panic") ||
+ str_ends_with(func->name, "_4core9panicking9panic_fmt") ||
+ str_ends_with(func->name, "_4core9panicking14panic_explicit") ||
+ str_ends_with(func->name, "_4core9panicking14panic_nounwind") ||
+ str_ends_with(func->name, "_4core9panicking18panic_bounds_check") ||
+ str_ends_with(func->name, "_4core9panicking19assert_failed_inner") ||
+ str_ends_with(func->name, "_4core9panicking36panic_misaligned_pointer_dereference") ||
+ strstr(func->name, "_4core9panicking11panic_const24panic_const_") ||
+ (strstr(func->name, "_4core5slice5index24slice_") &&
+ str_ends_with(func->name, "_fail"));
+}
+
/*
* This checks to see if the given function is a "noreturn" function.
*
if (!func)
return false;
- if (func->bind == STB_GLOBAL || func->bind == STB_WEAK)
+ if (func->bind == STB_GLOBAL || func->bind == STB_WEAK) {
+ if (is_rust_noreturn(func))
+ return true;
+
for (i = 0; i < ARRAY_SIZE(global_noreturns); i++)
if (!strcmp(func->name, global_noreturns[i]))
return true;
+ }
if (func->bind == STB_WEAK)
return false;
break;
}
- if (op->dest.reg == CFI_SP && op->src.reg == CFI_BP) {
+ if (op->dest.reg == CFI_BP && op->src.reg == CFI_SP &&
+ insn->sym->frame_pointer) {
+ /* addi.d fp,sp,imm on LoongArch */
+ if (cfa->base == CFI_SP && cfa->offset == op->src.offset) {
+ cfa->base = CFI_BP;
+ cfa->offset = 0;
+ }
+ break;
+ }
- /* lea disp(%rbp), %rsp */
- cfi->stack_size = -(op->src.offset + regs[CFI_BP].offset);
+ if (op->dest.reg == CFI_SP && op->src.reg == CFI_BP) {
+ /* addi.d sp,fp,imm on LoongArch */
+ if (cfa->base == CFI_BP && cfa->offset == 0) {
+ if (insn->sym->frame_pointer) {
+ cfa->base = CFI_SP;
+ cfa->offset = -op->src.offset;
+ }
+ } else {
+ /* lea disp(%rbp), %rsp */
+ cfi->stack_size = -(op->src.offset + regs[CFI_BP].offset);
+ }
break;
}
projects / linux.git / commitdiff