7281550cfb
Reviewed-by: Luc Michel <lmichel@kalray.eu> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
776 lines
22 KiB
C
776 lines
22 KiB
C
/*
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* Semihosting support for systems modeled on the Arm "Angel"
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* semihosting syscalls design. This includes Arm and RISC-V processors
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*
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* Copyright (c) 2005, 2007 CodeSourcery.
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* Copyright (c) 2019 Linaro
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* Written by Paul Brook.
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*
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* Copyright © 2020 by Keith Packard <keithp@keithp.com>
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* Adapted for systems other than ARM, including RISC-V, by Keith Packard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* ARM Semihosting is documented in:
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* Semihosting for AArch32 and AArch64 Release 2.0
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* https://static.docs.arm.com/100863/0200/semihosting.pdf
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*
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* RISC-V Semihosting is documented in:
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* RISC-V Semihosting
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* https://github.com/riscv/riscv-semihosting-spec/blob/main/riscv-semihosting-spec.adoc
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*/
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#include "qemu/osdep.h"
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#include "qemu/timer.h"
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#include "exec/gdbstub.h"
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#include "semihosting/semihost.h"
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#include "semihosting/console.h"
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#include "semihosting/common-semi.h"
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#include "semihosting/guestfd.h"
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#include "semihosting/syscalls.h"
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#ifdef CONFIG_USER_ONLY
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#include "qemu.h"
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#define COMMON_SEMI_HEAP_SIZE (128 * 1024 * 1024)
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#else
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#include "qemu/cutils.h"
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#include "hw/loader.h"
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#include "hw/boards.h"
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#endif
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#define TARGET_SYS_OPEN 0x01
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#define TARGET_SYS_CLOSE 0x02
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#define TARGET_SYS_WRITEC 0x03
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#define TARGET_SYS_WRITE0 0x04
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#define TARGET_SYS_WRITE 0x05
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#define TARGET_SYS_READ 0x06
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#define TARGET_SYS_READC 0x07
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#define TARGET_SYS_ISERROR 0x08
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#define TARGET_SYS_ISTTY 0x09
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#define TARGET_SYS_SEEK 0x0a
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#define TARGET_SYS_FLEN 0x0c
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#define TARGET_SYS_TMPNAM 0x0d
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#define TARGET_SYS_REMOVE 0x0e
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#define TARGET_SYS_RENAME 0x0f
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#define TARGET_SYS_CLOCK 0x10
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#define TARGET_SYS_TIME 0x11
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#define TARGET_SYS_SYSTEM 0x12
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#define TARGET_SYS_ERRNO 0x13
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#define TARGET_SYS_GET_CMDLINE 0x15
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#define TARGET_SYS_HEAPINFO 0x16
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#define TARGET_SYS_EXIT 0x18
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#define TARGET_SYS_SYNCCACHE 0x19
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#define TARGET_SYS_EXIT_EXTENDED 0x20
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#define TARGET_SYS_ELAPSED 0x30
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#define TARGET_SYS_TICKFREQ 0x31
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/* ADP_Stopped_ApplicationExit is used for exit(0),
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* anything else is implemented as exit(1) */
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#define ADP_Stopped_ApplicationExit (0x20026)
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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static int gdb_open_modeflags[12] = {
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GDB_O_RDONLY,
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GDB_O_RDONLY,
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GDB_O_RDWR,
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GDB_O_RDWR,
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GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC,
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GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC,
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GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC,
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GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC,
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GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND,
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GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND,
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GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND,
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GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND,
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};
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#ifndef CONFIG_USER_ONLY
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/**
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* common_semi_find_bases: find information about ram and heap base
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*
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* This function attempts to provide meaningful numbers for RAM and
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* HEAP base addresses. The rambase is simply the lowest addressable
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* RAM position. For the heapbase we ask the loader to scan the
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* address space and the largest available gap by querying the "ROM"
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* regions.
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*
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* Returns: a structure with the numbers we need.
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*/
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typedef struct LayoutInfo {
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target_ulong rambase;
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size_t ramsize;
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hwaddr heapbase;
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hwaddr heaplimit;
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} LayoutInfo;
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static bool find_ram_cb(Int128 start, Int128 len, const MemoryRegion *mr,
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hwaddr offset_in_region, void *opaque)
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{
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LayoutInfo *info = (LayoutInfo *) opaque;
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uint64_t size = int128_get64(len);
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if (!mr->ram || mr->readonly) {
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return false;
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}
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if (size > info->ramsize) {
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info->rambase = int128_get64(start);
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info->ramsize = size;
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}
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/* search exhaustively for largest RAM */
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return false;
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}
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static LayoutInfo common_semi_find_bases(CPUState *cs)
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{
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FlatView *fv;
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LayoutInfo info = { 0, 0, 0, 0 };
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RCU_READ_LOCK_GUARD();
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fv = address_space_to_flatview(cs->as);
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flatview_for_each_range(fv, find_ram_cb, &info);
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/*
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* If we have found the RAM lets iterate through the ROM blobs to
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* work out the best place for the remainder of RAM and split it
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* equally between stack and heap.
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*/
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if (info.rambase || info.ramsize > 0) {
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RomGap gap = rom_find_largest_gap_between(info.rambase, info.ramsize);
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info.heapbase = gap.base;
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info.heaplimit = gap.base + gap.size;
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}
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return info;
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}
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#endif
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#include "common-semi-target.h"
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/*
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* Read the input value from the argument block; fail the semihosting
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* call if the memory read fails. Eventually we could use a generic
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* CPUState helper function here.
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*/
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#define GET_ARG(n) do { \
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if (is_64bit_semihosting(env)) { \
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if (get_user_u64(arg ## n, args + (n) * 8)) { \
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goto do_fault; \
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} \
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} else { \
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if (get_user_u32(arg ## n, args + (n) * 4)) { \
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goto do_fault; \
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} \
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} \
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} while (0)
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#define SET_ARG(n, val) \
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(is_64bit_semihosting(env) ? \
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put_user_u64(val, args + (n) * 8) : \
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put_user_u32(val, args + (n) * 4))
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/*
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* The semihosting API has no concept of its errno being thread-safe,
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* as the API design predates SMP CPUs and was intended as a simple
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* real-hardware set of debug functionality. For QEMU, we make the
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* errno be per-thread in linux-user mode; in softmmu it is a simple
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* global, and we assume that the guest takes care of avoiding any races.
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*/
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#ifndef CONFIG_USER_ONLY
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static target_ulong syscall_err;
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#include "semihosting/softmmu-uaccess.h"
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#endif
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static inline uint32_t get_swi_errno(CPUState *cs)
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{
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#ifdef CONFIG_USER_ONLY
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TaskState *ts = cs->opaque;
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return ts->swi_errno;
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#else
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return syscall_err;
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#endif
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}
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static void common_semi_cb(CPUState *cs, uint64_t ret, int err)
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{
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if (err) {
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#ifdef CONFIG_USER_ONLY
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TaskState *ts = cs->opaque;
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ts->swi_errno = err;
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#else
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syscall_err = err;
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#endif
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}
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common_semi_set_ret(cs, ret);
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}
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/*
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* Use 0xdeadbeef as the return value when there isn't a defined
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* return value for the call.
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*/
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static void common_semi_dead_cb(CPUState *cs, uint64_t ret, int err)
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{
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common_semi_set_ret(cs, 0xdeadbeef);
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}
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/*
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* SYS_READ and SYS_WRITE always return the number of bytes not read/written.
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* There is no error condition, other than returning the original length.
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*/
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static void common_semi_rw_cb(CPUState *cs, uint64_t ret, int err)
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{
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/* Recover the original length from the third argument. */
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CPUArchState *env G_GNUC_UNUSED = cs->env_ptr;
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target_ulong args = common_semi_arg(cs, 1);
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target_ulong arg2;
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GET_ARG(2);
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if (err) {
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do_fault:
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ret = 0; /* error: no bytes transmitted */
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}
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common_semi_set_ret(cs, arg2 - ret);
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}
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/*
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* Convert from Posix ret+errno to Arm SYS_ISTTY return values.
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* With gdbstub, err is only ever set for protocol errors to EIO.
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*/
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static void common_semi_istty_cb(CPUState *cs, uint64_t ret, int err)
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{
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if (err) {
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ret = (err == ENOTTY ? 0 : -1);
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}
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common_semi_cb(cs, ret, err);
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}
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/*
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* SYS_SEEK returns 0 on success, not the resulting offset.
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*/
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static void common_semi_seek_cb(CPUState *cs, uint64_t ret, int err)
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{
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if (!err) {
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ret = 0;
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}
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common_semi_cb(cs, ret, err);
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}
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/*
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* Return an address in target memory of 64 bytes where the remote
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* gdb should write its stat struct. (The format of this structure
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* is defined by GDB's remote protocol and is not target-specific.)
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* We put this on the guest's stack just below SP.
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*/
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static target_ulong common_semi_flen_buf(CPUState *cs)
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{
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target_ulong sp = common_semi_stack_bottom(cs);
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return sp - 64;
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}
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static void
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common_semi_flen_fstat_cb(CPUState *cs, uint64_t ret, int err)
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{
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if (!err) {
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/* The size is always stored in big-endian order, extract the value. */
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uint64_t size;
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if (cpu_memory_rw_debug(cs, common_semi_flen_buf(cs) +
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offsetof(struct gdb_stat, gdb_st_size),
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&size, 8, 0)) {
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ret = -1, err = EFAULT;
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} else {
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size = be64_to_cpu(size);
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if (ret != size) {
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ret = -1, err = EOVERFLOW;
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}
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}
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}
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common_semi_cb(cs, ret, err);
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}
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static void
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common_semi_readc_cb(CPUState *cs, uint64_t ret, int err)
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{
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if (!err) {
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CPUArchState *env G_GNUC_UNUSED = cs->env_ptr;
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uint8_t ch;
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if (get_user_u8(ch, common_semi_stack_bottom(cs) - 1)) {
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ret = -1, err = EFAULT;
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} else {
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ret = ch;
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}
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}
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common_semi_cb(cs, ret, err);
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}
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#define SHFB_MAGIC_0 0x53
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#define SHFB_MAGIC_1 0x48
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#define SHFB_MAGIC_2 0x46
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#define SHFB_MAGIC_3 0x42
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/* Feature bits reportable in feature byte 0 */
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#define SH_EXT_EXIT_EXTENDED (1 << 0)
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#define SH_EXT_STDOUT_STDERR (1 << 1)
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static const uint8_t featurefile_data[] = {
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SHFB_MAGIC_0,
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SHFB_MAGIC_1,
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SHFB_MAGIC_2,
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SHFB_MAGIC_3,
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SH_EXT_EXIT_EXTENDED | SH_EXT_STDOUT_STDERR, /* Feature byte 0 */
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};
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/*
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* Do a semihosting call.
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*
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* The specification always says that the "return register" either
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* returns a specific value or is corrupted, so we don't need to
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* report to our caller whether we are returning a value or trying to
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* leave the register unchanged.
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*/
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void do_common_semihosting(CPUState *cs)
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{
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CPUArchState *env = cs->env_ptr;
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target_ulong args;
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target_ulong arg0, arg1, arg2, arg3;
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target_ulong ul_ret;
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char * s;
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int nr;
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uint32_t ret;
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int64_t elapsed;
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nr = common_semi_arg(cs, 0) & 0xffffffffU;
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args = common_semi_arg(cs, 1);
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switch (nr) {
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case TARGET_SYS_OPEN:
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{
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int ret, err = 0;
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int hostfd;
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GET_ARG(0);
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GET_ARG(1);
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GET_ARG(2);
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s = lock_user_string(arg0);
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if (!s) {
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goto do_fault;
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}
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if (arg1 >= 12) {
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unlock_user(s, arg0, 0);
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common_semi_cb(cs, -1, EINVAL);
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break;
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}
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if (strcmp(s, ":tt") == 0) {
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/*
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* We implement SH_EXT_STDOUT_STDERR, so:
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* open for read == stdin
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* open for write == stdout
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* open for append == stderr
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*/
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if (arg1 < 4) {
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hostfd = STDIN_FILENO;
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} else if (arg1 < 8) {
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hostfd = STDOUT_FILENO;
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} else {
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hostfd = STDERR_FILENO;
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}
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ret = alloc_guestfd();
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associate_guestfd(ret, hostfd);
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} else if (strcmp(s, ":semihosting-features") == 0) {
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/* We must fail opens for modes other than 0 ('r') or 1 ('rb') */
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if (arg1 != 0 && arg1 != 1) {
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ret = -1;
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err = EACCES;
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} else {
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ret = alloc_guestfd();
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staticfile_guestfd(ret, featurefile_data,
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sizeof(featurefile_data));
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}
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} else {
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unlock_user(s, arg0, 0);
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semihost_sys_open(cs, common_semi_cb, arg0, arg2 + 1,
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gdb_open_modeflags[arg1], 0644);
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break;
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}
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unlock_user(s, arg0, 0);
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common_semi_cb(cs, ret, err);
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break;
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}
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case TARGET_SYS_CLOSE:
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GET_ARG(0);
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semihost_sys_close(cs, common_semi_cb, arg0);
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break;
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case TARGET_SYS_WRITEC:
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/*
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* FIXME: the byte to be written is in a target_ulong slot,
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* which means this is wrong for a big-endian guest.
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*/
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semihost_sys_write_gf(cs, common_semi_dead_cb,
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&console_out_gf, args, 1);
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break;
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case TARGET_SYS_WRITE0:
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{
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ssize_t len = target_strlen(args);
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if (len < 0) {
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common_semi_dead_cb(cs, -1, EFAULT);
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} else {
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semihost_sys_write_gf(cs, common_semi_dead_cb,
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&console_out_gf, args, len);
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}
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}
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break;
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case TARGET_SYS_WRITE:
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GET_ARG(0);
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GET_ARG(1);
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GET_ARG(2);
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semihost_sys_write(cs, common_semi_rw_cb, arg0, arg1, arg2);
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break;
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case TARGET_SYS_READ:
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GET_ARG(0);
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GET_ARG(1);
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GET_ARG(2);
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semihost_sys_read(cs, common_semi_rw_cb, arg0, arg1, arg2);
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break;
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case TARGET_SYS_READC:
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semihost_sys_read_gf(cs, common_semi_readc_cb, &console_in_gf,
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common_semi_stack_bottom(cs) - 1, 1);
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break;
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case TARGET_SYS_ISERROR:
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GET_ARG(0);
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common_semi_set_ret(cs, (target_long)arg0 < 0);
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break;
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case TARGET_SYS_ISTTY:
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GET_ARG(0);
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semihost_sys_isatty(cs, common_semi_istty_cb, arg0);
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break;
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case TARGET_SYS_SEEK:
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GET_ARG(0);
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GET_ARG(1);
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semihost_sys_lseek(cs, common_semi_seek_cb, arg0, arg1, GDB_SEEK_SET);
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break;
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case TARGET_SYS_FLEN:
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GET_ARG(0);
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semihost_sys_flen(cs, common_semi_flen_fstat_cb, common_semi_cb,
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arg0, common_semi_flen_buf(cs));
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break;
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case TARGET_SYS_TMPNAM:
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{
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int len;
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char *p;
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GET_ARG(0);
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GET_ARG(1);
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GET_ARG(2);
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len = asprintf(&s, "/tmp/qemu-%x%02x", getpid(), (int)arg1 & 0xff);
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/* Make sure there's enough space in the buffer */
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|
if (len < 0 || len >= arg2) {
|
|
common_semi_set_ret(cs, -1);
|
|
break;
|
|
}
|
|
p = lock_user(VERIFY_WRITE, arg0, len, 0);
|
|
if (!p) {
|
|
goto do_fault;
|
|
}
|
|
memcpy(p, s, len + 1);
|
|
unlock_user(p, arg0, len);
|
|
free(s);
|
|
common_semi_set_ret(cs, 0);
|
|
break;
|
|
}
|
|
|
|
case TARGET_SYS_REMOVE:
|
|
GET_ARG(0);
|
|
GET_ARG(1);
|
|
semihost_sys_remove(cs, common_semi_cb, arg0, arg1 + 1);
|
|
break;
|
|
|
|
case TARGET_SYS_RENAME:
|
|
GET_ARG(0);
|
|
GET_ARG(1);
|
|
GET_ARG(2);
|
|
GET_ARG(3);
|
|
semihost_sys_rename(cs, common_semi_cb, arg0, arg1 + 1, arg2, arg3 + 1);
|
|
break;
|
|
|
|
case TARGET_SYS_CLOCK:
|
|
common_semi_set_ret(cs, clock() / (CLOCKS_PER_SEC / 100));
|
|
break;
|
|
|
|
case TARGET_SYS_TIME:
|
|
ul_ret = time(NULL);
|
|
common_semi_cb(cs, ul_ret, ul_ret == -1 ? errno : 0);
|
|
break;
|
|
|
|
case TARGET_SYS_SYSTEM:
|
|
GET_ARG(0);
|
|
GET_ARG(1);
|
|
semihost_sys_system(cs, common_semi_cb, arg0, arg1 + 1);
|
|
break;
|
|
|
|
case TARGET_SYS_ERRNO:
|
|
common_semi_set_ret(cs, get_swi_errno(cs));
|
|
break;
|
|
|
|
case TARGET_SYS_GET_CMDLINE:
|
|
{
|
|
/* Build a command-line from the original argv.
|
|
*
|
|
* The inputs are:
|
|
* * arg0, pointer to a buffer of at least the size
|
|
* specified in arg1.
|
|
* * arg1, size of the buffer pointed to by arg0 in
|
|
* bytes.
|
|
*
|
|
* The outputs are:
|
|
* * arg0, pointer to null-terminated string of the
|
|
* command line.
|
|
* * arg1, length of the string pointed to by arg0.
|
|
*/
|
|
|
|
char *output_buffer;
|
|
size_t input_size;
|
|
size_t output_size;
|
|
int status = 0;
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
const char *cmdline;
|
|
#else
|
|
TaskState *ts = cs->opaque;
|
|
#endif
|
|
GET_ARG(0);
|
|
GET_ARG(1);
|
|
input_size = arg1;
|
|
/* Compute the size of the output string. */
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
cmdline = semihosting_get_cmdline();
|
|
if (cmdline == NULL) {
|
|
cmdline = ""; /* Default to an empty line. */
|
|
}
|
|
output_size = strlen(cmdline) + 1; /* Count terminating 0. */
|
|
#else
|
|
unsigned int i;
|
|
|
|
output_size = ts->info->env_strings - ts->info->arg_strings;
|
|
if (!output_size) {
|
|
/*
|
|
* We special-case the "empty command line" case (argc==0).
|
|
* Just provide the terminating 0.
|
|
*/
|
|
output_size = 1;
|
|
}
|
|
#endif
|
|
|
|
if (output_size > input_size) {
|
|
/* Not enough space to store command-line arguments. */
|
|
common_semi_cb(cs, -1, E2BIG);
|
|
break;
|
|
}
|
|
|
|
/* Adjust the command-line length. */
|
|
if (SET_ARG(1, output_size - 1)) {
|
|
/* Couldn't write back to argument block */
|
|
goto do_fault;
|
|
}
|
|
|
|
/* Lock the buffer on the ARM side. */
|
|
output_buffer = lock_user(VERIFY_WRITE, arg0, output_size, 0);
|
|
if (!output_buffer) {
|
|
goto do_fault;
|
|
}
|
|
|
|
/* Copy the command-line arguments. */
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
pstrcpy(output_buffer, output_size, cmdline);
|
|
#else
|
|
if (output_size == 1) {
|
|
/* Empty command-line. */
|
|
output_buffer[0] = '\0';
|
|
goto out;
|
|
}
|
|
|
|
if (copy_from_user(output_buffer, ts->info->arg_strings,
|
|
output_size)) {
|
|
unlock_user(output_buffer, arg0, 0);
|
|
goto do_fault;
|
|
}
|
|
|
|
/* Separate arguments by white spaces. */
|
|
for (i = 0; i < output_size - 1; i++) {
|
|
if (output_buffer[i] == 0) {
|
|
output_buffer[i] = ' ';
|
|
}
|
|
}
|
|
out:
|
|
#endif
|
|
/* Unlock the buffer on the ARM side. */
|
|
unlock_user(output_buffer, arg0, output_size);
|
|
common_semi_cb(cs, status, 0);
|
|
}
|
|
break;
|
|
|
|
case TARGET_SYS_HEAPINFO:
|
|
{
|
|
target_ulong retvals[4];
|
|
int i;
|
|
#ifdef CONFIG_USER_ONLY
|
|
TaskState *ts = cs->opaque;
|
|
target_ulong limit;
|
|
#else
|
|
LayoutInfo info = common_semi_find_bases(cs);
|
|
#endif
|
|
|
|
GET_ARG(0);
|
|
|
|
#ifdef CONFIG_USER_ONLY
|
|
/*
|
|
* Some C libraries assume the heap immediately follows .bss, so
|
|
* allocate it using sbrk.
|
|
*/
|
|
if (!ts->heap_limit) {
|
|
abi_ulong ret;
|
|
|
|
ts->heap_base = do_brk(0);
|
|
limit = ts->heap_base + COMMON_SEMI_HEAP_SIZE;
|
|
/* Try a big heap, and reduce the size if that fails. */
|
|
for (;;) {
|
|
ret = do_brk(limit);
|
|
if (ret >= limit) {
|
|
break;
|
|
}
|
|
limit = (ts->heap_base >> 1) + (limit >> 1);
|
|
}
|
|
ts->heap_limit = limit;
|
|
}
|
|
|
|
retvals[0] = ts->heap_base;
|
|
retvals[1] = ts->heap_limit;
|
|
retvals[2] = ts->stack_base;
|
|
retvals[3] = 0; /* Stack limit. */
|
|
#else
|
|
retvals[0] = info.heapbase; /* Heap Base */
|
|
retvals[1] = info.heaplimit; /* Heap Limit */
|
|
retvals[2] = info.heaplimit; /* Stack base */
|
|
retvals[3] = info.heapbase; /* Stack limit. */
|
|
#endif
|
|
|
|
for (i = 0; i < ARRAY_SIZE(retvals); i++) {
|
|
bool fail;
|
|
|
|
if (is_64bit_semihosting(env)) {
|
|
fail = put_user_u64(retvals[i], arg0 + i * 8);
|
|
} else {
|
|
fail = put_user_u32(retvals[i], arg0 + i * 4);
|
|
}
|
|
|
|
if (fail) {
|
|
/* Couldn't write back to argument block */
|
|
goto do_fault;
|
|
}
|
|
}
|
|
common_semi_set_ret(cs, 0);
|
|
}
|
|
break;
|
|
|
|
case TARGET_SYS_EXIT:
|
|
case TARGET_SYS_EXIT_EXTENDED:
|
|
if (common_semi_sys_exit_extended(cs, nr)) {
|
|
/*
|
|
* The A64 version of SYS_EXIT takes a parameter block,
|
|
* so the application-exit type can return a subcode which
|
|
* is the exit status code from the application.
|
|
* SYS_EXIT_EXTENDED is an a new-in-v2.0 optional function
|
|
* which allows A32/T32 guests to also provide a status code.
|
|
*/
|
|
GET_ARG(0);
|
|
GET_ARG(1);
|
|
|
|
if (arg0 == ADP_Stopped_ApplicationExit) {
|
|
ret = arg1;
|
|
} else {
|
|
ret = 1;
|
|
}
|
|
} else {
|
|
/*
|
|
* The A32/T32 version of SYS_EXIT specifies only
|
|
* Stopped_ApplicationExit as normal exit, but does not
|
|
* allow the guest to specify the exit status code.
|
|
* Everything else is considered an error.
|
|
*/
|
|
ret = (args == ADP_Stopped_ApplicationExit) ? 0 : 1;
|
|
}
|
|
gdb_exit(ret);
|
|
exit(ret);
|
|
|
|
case TARGET_SYS_ELAPSED:
|
|
elapsed = get_clock() - clock_start;
|
|
if (sizeof(target_ulong) == 8) {
|
|
SET_ARG(0, elapsed);
|
|
} else {
|
|
SET_ARG(0, (uint32_t) elapsed);
|
|
SET_ARG(1, (uint32_t) (elapsed >> 32));
|
|
}
|
|
common_semi_set_ret(cs, 0);
|
|
break;
|
|
|
|
case TARGET_SYS_TICKFREQ:
|
|
/* qemu always uses nsec */
|
|
common_semi_set_ret(cs, 1000000000);
|
|
break;
|
|
|
|
case TARGET_SYS_SYNCCACHE:
|
|
/*
|
|
* Clean the D-cache and invalidate the I-cache for the specified
|
|
* virtual address range. This is a nop for us since we don't
|
|
* implement caches. This is only present on A64.
|
|
*/
|
|
if (common_semi_has_synccache(env)) {
|
|
common_semi_set_ret(cs, 0);
|
|
break;
|
|
}
|
|
/* fall through */
|
|
default:
|
|
fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);
|
|
cpu_dump_state(cs, stderr, 0);
|
|
abort();
|
|
|
|
do_fault:
|
|
common_semi_cb(cs, -1, EFAULT);
|
|
break;
|
|
}
|
|
}
|