Added riscv and riscv64 support for Linux

Change-Id: I62cd157d00a87720db001072662a81d8eb9112b0
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/3873291
Reviewed-by: Mike Frysinger <vapier@chromium.org>

src/google_breakpad/common/minidump_cpu_riscv.h

@@ -0,0 +1,168 @@
+/* minidump_format.h: A cross-platform reimplementation of minidump-related
+ * portions of DbgHelp.h from the Windows Platform SDK.
+ *
+ * (This is C99 source, please don't corrupt it with C++.)
+ *
+ * This file contains the necessary definitions to read minidump files
+ * produced on RISCV and RISCV64. These files may be read on any platform
+ * provided that the alignments of these structures on the processing system
+ * are identical to the alignments of these structures on the producing
+ * system. For this reason, precise-sized types are used. The structures
+ * defined by this file have been laid out to minimize alignment problems by
+ * ensuring that all members are aligned on their natural boundaries.
+ * In some cases, tail-padding may be significant when different ABIs specify
+ * different tail-padding behaviors. To avoid problems when reading or
+ * writing affected structures, MD_*_SIZE macros are provided where needed,
+ * containing the useful size of the structures without padding.
+ *
+ * Structures that are defined by Microsoft to contain a zero-length array
+ * are instead defined here to contain an array with one element, as
+ * zero-length arrays are forbidden by standard C and C++. In these cases,
+ * *_minsize constants are provided to be used in place of sizeof. For a
+ * cleaner interface to these sizes when using C++, see minidump_size.h.
+ *
+ * These structures are also sufficient to populate minidump files.
+ *
+ * Because precise data type sizes are crucial for this implementation to
+ * function properly and portably, a set of primitive types with known sizes
+ * are used as the basis of each structure defined by this file.
+ *
+ * Author: Iacopo Colonnelli
+ */
+
+/*
+ * RISCV and RISCV64 support
+ */
+
+#ifndef GOOGLE_BREAKPAD_COMMON_MINIDUMP_CPU_RISCV_H__
+#define GOOGLE_BREAKPAD_COMMON_MINIDUMP_CPU_RISCV_H__
+
+#include "google_breakpad/common/breakpad_types.h"
+
+#define MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT 32
+#if defined(__riscv)
+# if __riscv_flen == 32
+typedef uint32_t riscv_fpr_size;
+# elif __riscv_flen == 64
+typedef uint64_t riscv_fpr_size;
+# elif __riscv_flen == 128
+typedef uint128_struct riscv_fpr_size;
+# else
+#  error "Unexpected __riscv_flen"
+# endif
+#else
+typedef uint32_t riscv_fpr_size;
+#endif
+
+#define MD_CONTEXT_RISCV_GPR_COUNT 32
+
+typedef struct {
+    /* 32 floating point registers, f0 .. f31. */
+    riscv_fpr_size regs[MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT];
+    uint32_t fpcsr;
+} MDFloatingSaveAreaRISCV;
+
+enum MDRISCVRegisterNumbers {
+  MD_CONTEXT_RISCV_REG_PC     = 0,
+  MD_CONTEXT_RISCV_REG_RA     = 1,
+  MD_CONTEXT_RISCV_REG_SP     = 2,
+};
+
+/* For (MDRawContextRISCV).context_flags.  These values indicate the type of
+ * context stored in the structure. */
+#define MD_CONTEXT_RISCV 0x00800000
+#define MD_CONTEXT_RISCV_INTEGER (MD_CONTEXT_RISCV | 0x00000001)
+#define MD_CONTEXT_RISCV_FLOATING_POINT (MD_CONTEXT_RISCV | 0x00000004)
+#define MD_CONTEXT_RISCV_FULL (MD_CONTEXT_RISCV_INTEGER | \
+                               MD_CONTEXT_RISCV_FLOATING_POINT)
+
+typedef struct {
+  /* Determines which fields of this struct are populated */
+  uint32_t context_flags;
+
+  uint32_t pc;
+  uint32_t ra;
+  uint32_t sp;
+  uint32_t gp;
+  uint32_t tp;
+  uint32_t t0;
+  uint32_t t1;
+  uint32_t t2;
+  uint32_t s0;
+  uint32_t s1;
+  uint32_t a0;
+  uint32_t a1;
+  uint32_t a2;
+  uint32_t a3;
+  uint32_t a4;
+  uint32_t a5;
+  uint32_t a6;
+  uint32_t a7;
+  uint32_t s2;
+  uint32_t s3;
+  uint32_t s4;
+  uint32_t s5;
+  uint32_t s6;
+  uint32_t s7;
+  uint32_t s8;
+  uint32_t s9;
+  uint32_t s10;
+  uint32_t s11;
+  uint32_t t3;
+  uint32_t t4;
+  uint32_t t5;
+  uint32_t t6;
+
+  MDFloatingSaveAreaRISCV float_save;
+} MDRawContextRISCV;
+
+/* For (MDRawContextRISCV64).context_flags.  These values indicate the type of
+ * context stored in the structure. */
+#define MD_CONTEXT_RISCV64 0x08000000
+#define MD_CONTEXT_RISCV64_INTEGER (MD_CONTEXT_RISCV64 | 0x00000001)
+#define MD_CONTEXT_RISCV64_FLOATING_POINT (MD_CONTEXT_RISCV64 | 0x00000004)
+#define MD_CONTEXT_RISCV64_FULL (MD_CONTEXT_RISCV64_INTEGER | \
+                                 MD_CONTEXT_RISCV64_FLOATING_POINT)
+
+typedef struct {
+  /* Determines which fields of this struct are populated */
+  uint32_t context_flags;
+
+  uint64_t pc;
+  uint64_t ra;
+  uint64_t sp;
+  uint64_t gp;
+  uint64_t tp;
+  uint64_t t0;
+  uint64_t t1;
+  uint64_t t2;
+  uint64_t s0;
+  uint64_t s1;
+  uint64_t a0;
+  uint64_t a1;
+  uint64_t a2;
+  uint64_t a3;
+  uint64_t a4;
+  uint64_t a5;
+  uint64_t a6;
+  uint64_t a7;
+  uint64_t s2;
+  uint64_t s3;
+  uint64_t s4;
+  uint64_t s5;
+  uint64_t s6;
+  uint64_t s7;
+  uint64_t s8;
+  uint64_t s9;
+  uint64_t s10;
+  uint64_t s11;
+  uint64_t t3;
+  uint64_t t4;
+  uint64_t t5;
+  uint64_t t6;
+
+  MDFloatingSaveAreaRISCV float_save;
+} MDRawContextRISCV64;
+
+
+#endif  /* GOOGLE_BREAKPAD_COMMON_MINIDUMP_CPU_RISCV_H__ */

src/google_breakpad/common/minidump_format.h

@@ -117,6 +117,7 @@ typedef struct {
 #include "minidump_cpu_mips.h"
 #include "minidump_cpu_ppc.h"
 #include "minidump_cpu_ppc64.h"
+#include "minidump_cpu_riscv.h"
 #include "minidump_cpu_sparc.h"
 #include "minidump_cpu_x86.h"
 
@@ -683,6 +684,8 @@ typedef enum {
   MD_CPU_ARCHITECTURE_PPC64     = 0x8002, /* Breakpad-defined value for PPC64 */
   MD_CPU_ARCHITECTURE_ARM64_OLD = 0x8003, /* Breakpad-defined value for ARM64 */
   MD_CPU_ARCHITECTURE_MIPS64    = 0x8004, /* Breakpad-defined value for MIPS64 */
+  MD_CPU_ARCHITECTURE_RISCV     = 0x8005, /* Breakpad-defined value for RISCV */
+  MD_CPU_ARCHITECTURE_RISCV64   = 0x8006, /* Breakpad-defined value for RISCV64 */
   MD_CPU_ARCHITECTURE_UNKNOWN   = 0xffff  /* PROCESSOR_ARCHITECTURE_UNKNOWN */
 } MDCPUArchitecture;