From qemu-riscv Mon Dec 14 20:07:12 2020 From: Keith Packard Date: Mon, 14 Dec 2020 20:07:12 +0000 To: qemu-riscv Subject: [PATCH 8/9] semihosting: Implement SYS_TMPNAM Message-Id: <20201214200713.3886611-9-keithp () keithp ! com> X-MARC-Message: https://marc.info/?l=qemu-riscv&m=160819950630093 Part of Semihosting for AArch32 and AArch64 Release 2.0 Signed-off-by: Keith Packard --- hw/semihosting/common-semi.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/hw/semihosting/common-semi.c b/hw/semihosting/common-semi.c index b1368d945c..b0648c3812 100644 --- a/hw/semihosting/common-semi.c +++ b/hw/semihosting/common-semi.c @@ -835,6 +835,7 @@ target_ulong do_common_semihosting(CPUState *cs) CPUArchState *env = cs->env_ptr; target_ulong args; target_ulong arg0, arg1, arg2, arg3; + target_ulong ul_ret; char * s; int nr; uint32_t ret; @@ -998,8 +999,24 @@ target_ulong do_common_semihosting(CPUState *cs) return guestfd_fns[gf->type].flenfn(cs, gf); case TARGET_SYS_TMPNAM: - qemu_log_mask(LOG_UNIMP, "%s: SYS_TMPNAM not implemented", __func__); - return -1; + GET_ARG(0); + GET_ARG(1); + GET_ARG(2); + if (asprintf(&s, "/tmp/qemu-%x%02x", getpid(), + (int) (arg1 & 0xff)) < 0) { + return -1; + } + ul_ret = (target_ulong) -1; + + /* Make sure there's enough space in the buffer */ + if (strlen(s) < arg2) { + char *output = lock_user(VERIFY_WRITE, arg0, arg2, 0); + strcpy(output, s); + unlock_user(output, arg0, arg2); + ul_ret = 0; + } + free(s); + return ul_ret; case TARGET_SYS_REMOVE: GET_ARG(0); GET_ARG(1); -- 2.29.2