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[Qemu-devel] [PATCH v7 58/80] mips_malta: Fix semihosting argument passi
From: |
Aleksandar Markovic |
Subject: |
[Qemu-devel] [PATCH v7 58/80] mips_malta: Fix semihosting argument passing for nanoMIPS bare metal |
Date: |
Mon, 6 Aug 2018 19:00:25 +0200 |
From: Stefan Markovic <address@hidden>
Signed-off-by: Yongbok Kim <address@hidden>
Signed-off-by: Aleksandar Markovic <address@hidden>
Signed-off-by: Stefan Markovic <address@hidden>
---
hw/mips/mips_malta.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c
index d1a7c1f..8bb1686 100644
--- a/hw/mips/mips_malta.c
+++ b/hw/mips/mips_malta.c
@@ -643,7 +643,12 @@ static void write_bootloader_nanomips(uint8_t *base,
int64_t run_addr,
stw_p(p++, 0x8000); stw_p(p++, 0xc000); /* nop */
/* to_here: */
- stw_p(p++, 0x0080); stw_p(p++, 0x0002); /* li a0,2 */
+ if (semihosting_get_argc()) {
+ /* Preserve a0 content as arguments have been passed */
+ stw_p(p++, 0x8000); stw_p(p++, 0xc000); /* nop */
+ } else {
+ stw_p(p++, 0x0080); stw_p(p++, 0x0002); /* li a0,2 */
+ }
stw_p(p++, 0xe3a0 | NM_HI1(ENVP_ADDR - 64));
stw_p(p++, NM_HI2(ENVP_ADDR - 64));
/* lui sp,%hi(ENVP_ADDR - 64) */
--
2.7.4
- [Qemu-devel] [PATCH v7 51/80] target/mips: Adjust set_pc() for nanoMIPS, (continued)
- [Qemu-devel] [PATCH v7 51/80] target/mips: Adjust set_pc() for nanoMIPS, Aleksandar Markovic, 2018/08/06
- [Qemu-devel] [PATCH v7 52/80] target/mips: Fix ERET/ERETNC behavior related to ADEL exception, Aleksandar Markovic, 2018/08/06
- [Qemu-devel] [PATCH v7 53/80] elf: Add nanoMIPS specific variations in ELF header fields, Aleksandar Markovic, 2018/08/06
- [Qemu-devel] [PATCH v7 55/80] elf: Don't check FCR31_NAN2008 bit for nanoMIPS, Aleksandar Markovic, 2018/08/06
- [Qemu-devel] [PATCH v7 54/80] elf: Relax MIPS' elf_check_arch() to accept EM_NANOMIPS too, Aleksandar Markovic, 2018/08/06
- [Qemu-devel] [PATCH v7 56/80] mips_malta: Add basic nanoMIPS boot code for MIPS' Malta, Aleksandar Markovic, 2018/08/06
- [Qemu-devel] [PATCH v7 57/80] mips_malta: Setup GT64120 BARs in nanoMIPS bootloader, Aleksandar Markovic, 2018/08/06
- [Qemu-devel] [PATCH v7 58/80] mips_malta: Fix semihosting argument passing for nanoMIPS bare metal,
Aleksandar Markovic <=
- [Qemu-devel] [PATCH v7 59/80] gdbstub: Disable handling of nanoMIPS ISA bit in the MIPS gdbstub, Aleksandar Markovic, 2018/08/06
- [Qemu-devel] [PATCH v7 60/80] gdbstub: Add XML support for GDB for nanoMIPS, Aleksandar Markovic, 2018/08/06
- [Qemu-devel] [PATCH v7 61/80] target/mips: Add definition of nanoMIPS I7200 CPU, Aleksandar Markovic, 2018/08/06
- [Qemu-devel] [PATCH v7 62/80] linux-user: Add syscall numbers for nanoMIPS, Aleksandar Markovic, 2018/08/06
- [Qemu-devel] [PATCH v7 63/80] linux-user: Add target_signal.h header for nanoMIPS, Aleksandar Markovic, 2018/08/06
- [Qemu-devel] [PATCH v7 78/80] linux-user: Add nanoMIPS support in scripts/qemu-binfmt-conf.sh, Aleksandar Markovic, 2018/08/06
- [Qemu-devel] [PATCH v7 68/80] linux-user: Add target_syscall.h header for nanoMIPS, Aleksandar Markovic, 2018/08/06