linux-user: Move init_guest_commpage to x86_64/elfload.c

Rename INIT_GUEST_COMMPAGE to HAVE_GUEST_COMMPAGE
to match the other HAVE_* defines.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

4 files changed, 25 insertions, 22 deletions

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 07d83c6..0ba75a8 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -145,27 +145,6 @@ typedef abi_int         target_pid_t;
 #define ELF_CLASS      ELFCLASS64
 #define ELF_ARCH       EM_X86_64
 
-#if ULONG_MAX > UINT32_MAX
-#define INIT_GUEST_COMMPAGE
-static bool init_guest_commpage(void)
-{
-    /*
-     * The vsyscall page is at a high negative address aka kernel space,
-     * which means that we cannot actually allocate it with target_mmap.
-     * We still should be able to use page_set_flags, unless the user
-     * has specified -R reserved_va, which would trigger an assert().
-     */
-    if (reserved_va != 0 &&
-        TARGET_VSYSCALL_PAGE + TARGET_PAGE_SIZE - 1 > reserved_va) {
-        error_report("Cannot allocate vsyscall page");
-        exit(EXIT_FAILURE);
-    }
-    page_set_flags(TARGET_VSYSCALL_PAGE,
-                   TARGET_VSYSCALL_PAGE | ~TARGET_PAGE_MASK,
-                   PAGE_EXEC | PAGE_VALID);
-    return true;
-}
-#endif
 #else
 
 /*
@@ -1215,7 +1194,7 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
 #else
 #define HI_COMMPAGE 0
 #define LO_COMMPAGE -1
-#ifndef INIT_GUEST_COMMPAGE
+#ifndef HAVE_GUEST_COMMPAGE
 #define init_guest_commpage() true
 #endif
 #endif
diff --git a/linux-user/loader.h b/linux-user/loader.h
index 8f4a7f6..98015fb 100644
--- a/linux-user/loader.h
+++ b/linux-user/loader.h
@@ -105,6 +105,9 @@ const char *elf_hwcap_str(uint32_t bit);
 const char *elf_hwcap2_str(uint32_t bit);
 const char *get_elf_platform(CPUState *cs);
 const char *get_elf_base_platform(CPUState *cs);
+#if defined(TARGET_X86_64)
+bool init_guest_commpage(void);
+#endif
 
 struct target_elf_gregset_t;
 void elf_core_copy_regs(struct target_elf_gregset_t *, const CPUArchState *);
diff --git a/linux-user/x86_64/elfload.c b/linux-user/x86_64/elfload.c
index 12de1c5..1e7000c 100644
--- a/linux-user/x86_64/elfload.c
+++ b/linux-user/x86_64/elfload.c
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 
 #include "qemu/osdep.h"
+#include "qemu/error-report.h"
 #include "qemu.h"
 #include "loader.h"
 #include "target_elf.h"
@@ -21,6 +22,25 @@ const char *get_elf_platform(CPUState *cs)
     return "x86_64";
 }
 
+bool init_guest_commpage(void)
+{
+    /*
+     * The vsyscall page is at a high negative address aka kernel space,
+     * which means that we cannot actually allocate it with target_mmap.
+     * We still should be able to use page_set_flags, unless the user
+     * has specified -R reserved_va, which would trigger an assert().
+     */
+    if (reserved_va != 0 &&
+        TARGET_VSYSCALL_PAGE + TARGET_PAGE_SIZE - 1 > reserved_va) {
+        error_report("Cannot allocate vsyscall page");
+        exit(EXIT_FAILURE);
+    }
+    page_set_flags(TARGET_VSYSCALL_PAGE,
+                   TARGET_VSYSCALL_PAGE | ~TARGET_PAGE_MASK,
+                   PAGE_EXEC | PAGE_VALID);
+    return true;
+}
+
 void elf_core_copy_regs(target_elf_gregset_t *r, const CPUX86State *env)
 {
     r->pt.r15 = tswapal(env->regs[15]);
diff --git a/linux-user/x86_64/target_elf.h b/linux-user/x86_64/target_elf.h
index 32a9eec..f05b1d4 100644
--- a/linux-user/x86_64/target_elf.h
+++ b/linux-user/x86_64/target_elf.h
@@ -13,6 +13,7 @@
 #define HAVE_ELF_HWCAP          1
 #define HAVE_ELF_PLATFORM       1
 #define HAVE_ELF_CORE_DUMP      1
+#define HAVE_GUEST_COMMPAGE     1
 
 /*
  * See linux kernel: arch/x86/include/asm/elf.h, where