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[Qemu-devel] [PATCH v9 61/84] mips_malta: Fix semihosting argument passi
From: |
Aleksandar Markovic |
Subject: |
[Qemu-devel] [PATCH v9 61/84] mips_malta: Fix semihosting argument passing for nanoMIPS bare metal |
Date: |
Thu, 16 Aug 2018 16:57:54 +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 v9 16/84] target/mips: Add preprocessor constants for nanoMIPS, (continued)
- [Qemu-devel] [PATCH v9 16/84] target/mips: Add preprocessor constants for nanoMIPS, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 49/84] target/mips: Add handling of ISA mode bit for nanoMIPS, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 58/84] elf: On elf loading, treat both EM_MIPS and EM_NANOMIPS as legal for MIPS, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 45/84] target/mips: Add emulation of DSP ASE for nanoMIPS - part 4, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 50/84] target/mips: Add updating BadInstr, BadInstrP, BadInstrX for nanoMIPS, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 55/84] elf: Add EM_NANOMIPS value as a valid one for e_machine field, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 61/84] mips_malta: Fix semihosting argument passing for nanoMIPS bare metal,
Aleksandar Markovic <=
- [Qemu-devel] [PATCH v9 65/84] linux-user: Add target_signal.h header for nanoMIPS, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 68/84] linux-user: Add target_fcntl.h header for nanoMIPS, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 63/84] elf: Add nanoMIPS specific variations in ELF header fields, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 67/84] linux-user: Update syscall_defs.h header for nanoMIPS, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 71/84] linux-user: Add target_cpu.h header for nanoMIPS, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 66/84] linux-user: Add termbits.h header for nanoMIPS, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 53/84] target/mips: Adjust set_pc() for nanoMIPS, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 56/84] elf: Relax MIPS' elf_check_arch() to accept EM_NANOMIPS too, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 64/84] linux-user: Add syscall numbers for nanoMIPS, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 70/84] linux-user: Add target_syscall.h header for nanoMIPS, Aleksandar Markovic, 2018/08/16