[RFC PATCH 05/18] qemu: Introduce legacy_binary_is_64bit() helper

[Philippe Mathieu-Daudé]

Introduce legacy_binary_is_64bit() to check at runtime if
a binary is compiled with TARGET_LONG_BITS == 64.

Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
---
 include/qemu/legacy_binary_info.h |  3 +++
 legacy_binary_info.c              | 37 +++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/include/qemu/legacy_binary_info.h 
b/include/qemu/legacy_binary_info.h
index ae67399ebf2..2d42e852b7a 100644
--- a/include/qemu/legacy_binary_info.h
+++ b/include/qemu/legacy_binary_info.h
@@ -11,4 +11,7 @@
 
 void legacy_binary_info_init(const char *argv0);
 
+/* Return runtime equivalent of TARGET_LONG_BITS == 64 check */
+bool legacy_binary_is_64bit(void);
+
 #endif
diff --git a/legacy_binary_info.c b/legacy_binary_info.c
index 0c50fc9248a..be50d3f50ea 100644
--- a/legacy_binary_info.c
+++ b/legacy_binary_info.c
@@ -13,6 +13,7 @@
 typedef struct LegacyBinaryInfo {
     const char *binary_name;
     QemuArchBit arch_bit;
+    unsigned long_bits;
 } LegacyBinaryInfo;
 
 /* List alphabetically sorted by binary_name */
@@ -20,118 +21,147 @@ static const LegacyBinaryInfo legacy_binary_infos[] = {
     {
         .binary_name = "qemu-system-aarch64",
         .arch_bit = QEMU_ARCH_BIT_ARM,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-alpha",
         .arch_bit = QEMU_ARCH_BIT_ALPHA,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-arm",
         .arch_bit = QEMU_ARCH_BIT_ARM,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-avr",
         .arch_bit = QEMU_ARCH_BIT_AVR,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-hppa",
         .arch_bit = QEMU_ARCH_BIT_HPPA,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-i386",
         .arch_bit = QEMU_ARCH_BIT_I386,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-loongarch64",
         .arch_bit = QEMU_ARCH_BIT_LOONGARCH,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-m68k",
         .arch_bit = QEMU_ARCH_BIT_M68K,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-microblaze",
         .arch_bit = QEMU_ARCH_BIT_MICROBLAZE,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-microblazeel",
         .arch_bit = QEMU_ARCH_BIT_MICROBLAZE,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-mips",
         .arch_bit = QEMU_ARCH_BIT_MIPS,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-mips64",
         .arch_bit = QEMU_ARCH_BIT_MIPS,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-mips64el",
         .arch_bit = QEMU_ARCH_BIT_MIPS,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-mipsel",
         .arch_bit = QEMU_ARCH_BIT_MIPS,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-or1k",
         .arch_bit = QEMU_ARCH_BIT_OPENRISC,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-ppc",
         .arch_bit = QEMU_ARCH_BIT_PPC,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-ppc64",
         .arch_bit = QEMU_ARCH_BIT_PPC,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-riscv32",
         .arch_bit = QEMU_ARCH_BIT_RISCV,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-riscv64",
         .arch_bit = QEMU_ARCH_BIT_RISCV,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-rx",
         .arch_bit = QEMU_ARCH_BIT_RX,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-s390x",
         .arch_bit = QEMU_ARCH_BIT_S390X,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-sh4",
         .arch_bit = QEMU_ARCH_BIT_SH4,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-sh4eb",
         .arch_bit = QEMU_ARCH_BIT_SH4,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-sparc",
         .arch_bit = QEMU_ARCH_BIT_SPARC,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-sparc64",
         .arch_bit = QEMU_ARCH_BIT_SPARC,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-tricore",
         .arch_bit = QEMU_ARCH_BIT_TRICORE,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-x86_64",
         .arch_bit = QEMU_ARCH_BIT_I386,
+        .long_bits = 64,
     },
     {
         .binary_name = "qemu-system-xtensa",
         .arch_bit = QEMU_ARCH_BIT_XTENSA,
+        .long_bits = 32,
     },
     {
         .binary_name = "qemu-system-xtensaeb",
         .arch_bit = QEMU_ARCH_BIT_XTENSA,
+        .long_bits = 32,
     },
 };
 
@@ -151,6 +181,7 @@ void legacy_binary_info_init(const char *argv0)
 
     for (size_t i = 0; i < ARRAY_SIZE(legacy_binary_infos); i++) {
         if (!strcmp(legacy_binary_infos[i].binary_name, binary_name)) {
+            assert(legacy_binary_infos[i].long_bits);
             current_index = i;
             return;
         }
@@ -158,3 +189,9 @@ void legacy_binary_info_init(const char *argv0)
     fprintf(stderr, "Missing legacy info for '%s' binary.\n", binary_name);
     abort();
 }
+
+bool legacy_binary_is_64bit(void)
+{
+    assert(current_index != -1);
+    return legacy_binary_infos[current_index].long_bits == 64;
+}
-- 
2.47.1