This patch fixes a bug that caused semihosted exit to always return status 0; it was incorrectly using the value of register R_ARG0 (which contains the HOSTED_EXIT request number) instead of register R_ARG1.
Note that per the newlib documentation for the nios2 semihosting protocol https://www.sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;a=blob;f=libgloss/nios2/nios2-semi.txt;h=ded3a093c03dbae84cb95b4cd45bc3e0d751eda2;hb=HEAD for the HOSTED_EXIT syscall the parameter is passed directly in the register instead of in a parameter block pointed to by the register. Signed-off-by: Sandra Loosemore <san...@codesourcery.com> Reviewed-by: Laurent Vivier <laur...@vivier.eu> --- target/nios2/nios2-semi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/target/nios2/nios2-semi.c b/target/nios2/nios2-semi.c index d7a80dd..06c0861 100644 --- a/target/nios2/nios2-semi.c +++ b/target/nios2/nios2-semi.c @@ -215,8 +215,8 @@ void do_nios2_semihosting(CPUNios2State *env) args = env->regs[R_ARG1]; switch (nr) { case HOSTED_EXIT: - gdb_exit(env, env->regs[R_ARG0]); - exit(env->regs[R_ARG0]); + gdb_exit(env, env->regs[R_ARG1]); + exit(env->regs[R_ARG1]); case HOSTED_OPEN: GET_ARG(0); GET_ARG(1); -- 2.8.1