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[Qemu-devel] [PATCH v8 64/87] mips_malta: Fix semihosting argument passi
From: |
Aleksandar Markovic |
Subject: |
[Qemu-devel] [PATCH v8 64/87] mips_malta: Fix semihosting argument passing for nanoMIPS bare metal |
Date: |
Mon, 13 Aug 2018 19:53:29 +0200 |
From: Stefan Markovic <address@hidden>
Fix passing argument for nanoMIPS bare metal related to the
semihosting regime.
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
Reviewed-by: Aleksandar 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 | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c
index f261dd6..40041d5 100644
--- a/hw/mips/mips_malta.c
+++ b/hw/mips/mips_malta.c
@@ -630,8 +630,14 @@ static void write_bootloader_nanomips(uint8_t *base,
int64_t run_addr,
/* nop */
/* to_here: */
- stw_p(p++, 0x0080); stw_p(p++, 0x0002);
+ 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));
--
2.7.4
- [Qemu-devel] [PATCH v8 57/87] target/mips: Fix ERET/ERETNC behavior related to ADEL exception, (continued)
- [Qemu-devel] [PATCH v8 57/87] target/mips: Fix ERET/ERETNC behavior related to ADEL exception, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 17/87] linux-user: Update MIPS syscall numbers up to kernel 4.18 headers, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 23/87] target/mips: Add placeholder and invocation of decode_nanomips_opc(), Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 21/87] target/mips: Add nanoMIPS base instruction set opcodes, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 54/87] target/mips: Adjust exception_resume_pc() for nanoMIPS, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 56/87] target/mips: Adjust set_pc() for nanoMIPS, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 39/87] target/mips: Implement emulation of nanoMIPS ROTX instruction, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 52/87] target/mips: Add handling of branch delay slots for nanoMIPS, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 50/87] target/mips: Add emulation of DSP ASE for nanoMIPS - part 6, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 49/87] target/mips: Add emulation of DSP ASE for nanoMIPS - part 5, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 64/87] mips_malta: Fix semihosting argument passing for nanoMIPS bare metal,
Aleksandar Markovic <=
- [Qemu-devel] [PATCH v8 68/87] linux-user: Add target_signal.h header for nanoMIPS, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 72/87] linux-user: Add sockbits.h header for nanoMIPS, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 69/87] linux-user: Add termbits.h header for nanoMIPS, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 62/87] mips_malta: Add basic nanoMIPS boot code for Malta board, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 65/87] target/mips: Add definition of nanoMIPS I7200 CPU, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 42/87] target/mips: Implement emulation of nanoMIPS LLWP/SCWP pair, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 63/87] mips_malta: Add setting up GT64120 BARs to the nanoMIPS bootloader, Aleksandar Markovic, 2018/08/13