fix: breakpad use miniz

third_party/zlib-ng/arch/riscv/riscv_features.c

@@ -0,0 +1,71 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/utsname.h>
+
+#if defined(__linux__) && defined(HAVE_SYS_AUXV_H)
+#  include <sys/auxv.h>
+#endif
+
+#include "zbuild.h"
+#include "riscv_features.h"
+
+#define ISA_V_HWCAP (1 << ('v' - 'a'))
+
+int Z_INTERNAL is_kernel_version_greater_or_equal_to_6_5() {
+    struct utsname buffer;
+    if (uname(&buffer) == -1) {
+        // uname failed
+        return 0;
+    }
+
+    int major, minor;
+    if (sscanf(buffer.release, "%d.%d", &major, &minor) != 2) {
+        // Something bad with uname()
+        return 0;
+    }
+
+    if (major > 6 || (major == 6 && minor >= 5))
+        return 1;
+    return 0;
+}
+
+void Z_INTERNAL riscv_check_features_compile_time(struct riscv_cpu_features *features) {
+#if defined(__riscv_v) && defined(__linux__)
+    features->has_rvv = 1;
+#else
+    features->has_rvv = 0;
+#endif
+}
+
+void Z_INTERNAL riscv_check_features_runtime(struct riscv_cpu_features *features) {
+#if defined(__linux__) && defined(HAVE_SYS_AUXV_H)
+    unsigned long hw_cap = getauxval(AT_HWCAP);
+#else
+    unsigned long hw_cap = 0;
+#endif
+    features->has_rvv = hw_cap & ISA_V_HWCAP;
+}
+
+void Z_INTERNAL riscv_check_features(struct riscv_cpu_features *features) {
+    if (is_kernel_version_greater_or_equal_to_6_5())
+        riscv_check_features_runtime(features);
+    else
+        riscv_check_features_compile_time(features);
+    if (features->has_rvv) {
+        size_t e8m1_vec_len;
+        intptr_t vtype_reg_val;
+        // Check that a vuint8m1_t vector is at least 16 bytes and that tail
+        // agnostic and mask agnostic mode are supported
+        //
+        __asm__ volatile(
+                "vsetvli %0, zero, e8, m1, ta, ma\n\t"
+                "csrr %1, vtype"
+                : "=r"(e8m1_vec_len), "=r"(vtype_reg_val));
+
+        // The RVV target is supported if the VILL bit of VTYPE (the MSB bit of
+        // VTYPE) is not set and the length of a vuint8m1_t vector is at least 16
+        // bytes
+        features->has_rvv = (vtype_reg_val >= 0 && e8m1_vec_len >= 16);
+    }
+}