From: Richard Henderson <richard.henderson@linaro.org>
Date: Wed, 16 Aug 2023 17:32:18 +0000 (-0700)
Subject: linux-user: Adjust brk for load_bias
X-Git-Tag: v8.2.0-rc0~143^2~7
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=aec338d63bc28f1f13d5e64c561d7f1dd0e4b07e;p=thirdparty%2Fqemu.git

linux-user: Adjust brk for load_bias

PIE executables are usually linked at offset 0 and are
relocated somewhere during load.  The hiaddr needs to
be adjusted to keep the brk next to the executable.

Cc: qemu-stable@nongnu.org
Fixes: 1f356e8c013 ("linux-user: Adjust initial brk when interpreter is close to executable")
Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 7c95098e3ed..d52d47c5c33 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -3327,7 +3327,7 @@ static void load_elf_image(const char *image_name, int image_fd,
     info->start_data = -1;
     info->end_data = 0;
     /* Usual start for brk is after all sections of the main executable. */
-    info->brk = TARGET_PAGE_ALIGN(hiaddr);
+    info->brk = TARGET_PAGE_ALIGN(hiaddr + load_bias);
     info->elf_flags = ehdr->e_flags;
 
     prot_exec = PROT_EXEC;