From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39252) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XAg3v-0000ZC-20 for qemu-devel@nongnu.org; Fri, 25 Jul 2014 10:01:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XAg3m-0004IZ-Kk for qemu-devel@nongnu.org; Fri, 25 Jul 2014 10:01:31 -0400 Received: from smtp.codeaurora.org ([198.145.11.231]:53957) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XAg3m-0004IR-Ep for qemu-devel@nongnu.org; Fri, 25 Jul 2014 10:01:22 -0400 Message-ID: <53D2632D.4070700@codeaurora.org> Date: Fri, 25 Jul 2014 10:01:17 -0400 From: Christopher Covington MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] AArch64 ELF File Loading List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "qemu-devel@nongnu.org" , Peter Maydell Hi, I think the AArch64 port has a problem with a self-modifying code sequence that appears to run fine on other simulators, but I can't get QEMU to run the small bare metal test case I created to try to reproduce the issue. Any help would be appreciated. qemu-system-aarch64 -nodefaults -nographic -monitor none -M virt -semihosting -d exec,in_asm /tmp/test-nooverwrite 2>&1 | less qemu: fatal: Trying to execute code outside RAM or ROM at 0x0000000000000000 qemu-system-aarch64 -nodefaults -nographic -monitor none -M virt -semihosting -d exec,in_asm -bios /tmp/test-nooverwrite 2>&1 | less qemu: fatal: Trying to execute code outside RAM or ROM at 0x0000000000000000 qemu-system-aarch64 -nodefaults -nographic -monitor none -M virt -semihosting -d exec,in_asm -kernel /tmp/test-nooverwrite 2>&1 | less IN: 0x0000000040000000: e3a00000 mov r0, #0 ; 0x0 0x0000000040000004: e59f1004 ldr r1, [pc, #4] ; 0x40000010 0x0000000040000008: e59f2004 ldr r2, [pc, #4] ; 0x40000014 0x000000004000000c: e59ff004 ldr pc, [pc, #4] ; 0x40000018 Trace 0x7f309f012000 [0000000040000000] Note that the above are A32 instructions, but my ELF is A64 and this is not the specified entry point. aarch64-linux-gnu-readelf -h /tmp/test-nooverwrite ELF Header: Magic: 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 Class: ELF64 Data: 2's complement, little endian Version: 1 (current) OS/ABI: UNIX - System V ABI Version: 0 Type: EXEC (Executable file) Machine: AArch64 Version: 0x1 Entry point address: 0x80001140 Start of program headers: 64 (bytes into file) Start of section headers: 186600 (bytes into file) Flags: 0x0 Size of this header: 64 (bytes) Size of program headers: 56 (bytes) Number of program headers: 3 Size of section headers: 64 (bytes) Number of section headers: 17 Section header string table index: 14 To generate a test bare metal executable, you can download the aarch64-none-elf toolchain from Linaro and: echo '#include int main() { printf("Hello, world!\n"); return 0; }' > hello.c aarch64-none-elf-gcc -specs=aem-ve.specs hello.c -o hello Thanks, Christopher -- Employee of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the Linux Foundation.