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[PATCH v1 19/20] semihosting: Implement SYS_TMPNAM
From: |
Alex Bennée |
Subject: |
[PATCH v1 19/20] semihosting: Implement SYS_TMPNAM |
Date: |
Fri, 8 Jan 2021 22:42:55 +0000 |
From: Keith Packard <keithp@keithp.com>
Part of Semihosting for AArch32 and AArch64 Release 2.0
Signed-off-by: Keith Packard <keithp@keithp.com>
Message-Id: <20210107170717.2098982-9-keithp@keithp.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
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 3d6604dcdd..a631904fb0 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);
--
2.20.1
- Re: [PATCH v1 10/20] target/arm: use official org.gnu.gdb.aarch64.sve layout for registers, (continued)
- [PATCH v1 12/20] semihosting: Move ARM semihosting code to shared directories, Alex Bennée, 2021/01/08
- [PATCH v1 13/20] semihosting: Change common-semi API to be architecture-independent, Alex Bennée, 2021/01/08
- [PATCH v1 14/20] semihosting: Change internal common-semi interfaces to use CPUState *, Alex Bennée, 2021/01/08
- [PATCH v1 20/20] semihosting: Implement SYS_ISERROR, Alex Bennée, 2021/01/08
- [PATCH v1 18/20] semihosting: Implement SYS_ELAPSED and SYS_TICKFREQ, Alex Bennée, 2021/01/08
- [PATCH v1 19/20] semihosting: Implement SYS_TMPNAM,
Alex Bennée <=
- [PATCH v1 17/20] riscv: Add semihosting support for user mode, Alex Bennée, 2021/01/08
- [PATCH v1 16/20] riscv: Add semihosting support, Alex Bennée, 2021/01/08
- [PATCH v1 15/20] semihosting: Support SYS_HEAPINFO when env->boot_info is not set, Alex Bennée, 2021/01/08