| Summary: | The application stack can be corrupted when an interrupt occurs somewhere | ||
|---|---|---|---|
| Product: | gcc | Reporter: | Chengfa Wang <cwang> |
| Component: | target | Assignee: | Not yet assigned to anyone <unassigned> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | normal | CC: | cwang, davem, gcc-bugs, heavy, ramana.r, rearnsha |
| Priority: | P3 | Keywords: | wrong-code |
| Version: | 4.4.1 | ||
| Target Milestone: | --- | ||
| Host: | Target: | arm*-*-* | |
| Build: | Known to work: | ||
| Known to fail: | Last reconfirmed: | ||
Actually, The value which r4 points to in the above function will be corrupted when an interrupt occurs between address 11c6e2 and address 11c6e4 and the interrupt service routine shares a same stack with the above function. |
The options given when GCC was configured/built: Using built-in specs. Target: arm-none-eabi Configured with: /scratch/julian/2009q3-respin-eabi-lite/src/gcc-4.4/configure --build=i686-pc-linux-gnu --host=i686-min gw32 --target=arm-none-eabi --enable-threads --disable-libmudflap --disable-libssp --disable-libstdcxx-pch --enable-extr a-sgxxlite-multilibs --with-gnu-as --with-gnu-ld --with-specs='%{O2:%{!fno-remove-local-statics: -fremove-local-statics} } %{O*:%{O|O0|O1|O2|Os:;:%{!fno-remove-local-statics: -fremove-local-statics}}}' --enable-languages=c,c++ --disable-shar ed --disable-lto --with-newlib --with-pkgversion='Sourcery G++ Lite 2009q3-68' --with-bugurl=https://support.codesourcer y.com/GNUToolchain/ --disable-nls --prefix=/opt/codesourcery --with-headers=yes --with-sysroot=/opt/codesourcery/arm-non e-eabi --with-build-sysroot=/scratch/julian/2009q3-respin-eabi-lite/install/host-i686-mingw32/arm-none-eabi --with-libic onv-prefix=/scratch/julian/2009q3-respin-eabi-lite/obj/host-libs-2009q3-68-arm-none-eabi-i686-mingw32/usr --with-gmp=/sc ratch/julian/2009q3-respin-eabi-lite/obj/host-libs-2009q3-68-arm-none-eabi-i686-mingw32/usr --with-mpfr=/scratch/julian/ 2009q3-respin-eabi-lite/obj/host-libs-2009q3-68-arm-none-eabi-i686-mingw32/usr --with-ppl=/scratch/julian/2009q3-respin- eabi-lite/obj/host-libs-2009q3-68-arm-none-eabi-i686-mingw32/usr --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lst dc++,-Bdynamic -lm' --with-cloog=/scratch/julian/2009q3-respin-eabi-lite/obj/host-libs-2009q3-68-arm-none-eabi-i686-ming w32/usr --disable-libgomp --enable-poison-system-directories --with-build-time-tools=/scratch/julian/2009q3-respin-eabi- lite/obj/tools-i686-pc-linux-gnu-2009q3-68-arm-none-eabi-i686-mingw32/arm-none-eabi/bin --with-build-time-tools=/scratch /julian/2009q3-respin-eabi-lite/obj/tools-i686-pc-linux-gnu-2009q3-68-arm-none-eabi-i686-mingw32/arm-none-eabi/bin Thread model: single gcc version 4.4.1 (Sourcery G++ Lite 2009q3-68) 0011c6d0 <getFPGARefRate>: 11c6d0: b510 push {r4, lr} 11c6d2: b082 sub sp, #8 11c6d4: 466c mov r4, sp 11c6d6: 3406 adds r4, #6 11c6d8: 201d movs r0, #29 11c6da: 1c21 adds r1, r4, #0 11c6dc: 2201 movs r2, #1 11c6de: f7ff ff6f bl 11c5c0 <readFPGA> 11c6e2: b002 add sp, #8 11c6e4: 8820 ldrh r0, [r4, #0] 11c6e6: bc10 pop {r4} 11c6e8: bc02 pop {r1} 11c6ea: 4708 bx r The returned value (r0) of the above function will be overwritten when an interrupt occurs between address 11c6e2 and address 11c6e4 and the interrupt service routine shares same stack with the above function. I think the quick fix is to swap the instructions between address 11c6e2 and address 11c6e4.