6 files changed, 317 insertions, 7 deletions
diff --git a/include/user/abitypes.h b/include/user/abitypes.h
index 5c9a955..7528124 100644
--- a/include/user/abitypes.h
+++ b/include/user/abitypes.h
@@ -21,13 +21,6 @@
 #define ABI_LLONG_ALIGNMENT 2
 #endif
 
-#ifdef TARGET_CRIS
-#define ABI_SHORT_ALIGNMENT 1
-#define ABI_INT_ALIGNMENT 1
-#define ABI_LONG_ALIGNMENT 1
-#define ABI_LLONG_ALIGNMENT 1
-#endif
-
 #if (defined(TARGET_I386) && !defined(TARGET_X86_64)) \
     || defined(TARGET_SH4) \
     || defined(TARGET_OPENRISC) \
diff --git a/include/user/cpu_loop.h b/include/user/cpu_loop.h
new file mode 100644
index 0000000..ad8a1d7
--- /dev/null
+++ b/include/user/cpu_loop.h
@@ -0,0 +1,88 @@
+/*
+ *  qemu user cpu loop
+ *
+ *  Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef USER_CPU_LOOP_H
+#define USER_CPU_LOOP_H
+
+#include "exec/vaddr.h"
+#include "exec/mmu-access-type.h"
+
+
+/**
+ * adjust_signal_pc:
+ * @pc: raw pc from the host signal ucontext_t.
+ * @is_write: host memory operation was write, or read-modify-write.
+ *
+ * Alter @pc as required for unwinding.  Return the type of the
+ * guest memory access -- host reads may be for guest execution.
+ */
+MMUAccessType adjust_signal_pc(uintptr_t *pc, bool is_write);
+
+/**
+ * handle_sigsegv_accerr_write:
+ * @cpu: the cpu context
+ * @old_set: the sigset_t from the signal ucontext_t
+ * @host_pc: the host pc, adjusted for the signal
+ * @host_addr: the host address of the fault
+ *
+ * Return true if the write fault has been handled, and should be re-tried.
+ */
+bool handle_sigsegv_accerr_write(CPUState *cpu, sigset_t *old_set,
+                                 uintptr_t host_pc, vaddr guest_addr);
+
+/**
+ * cpu_loop_exit_sigsegv:
+ * @cpu: the cpu context
+ * @addr: the guest address of the fault
+ * @access_type: access was read/write/execute
+ * @maperr: true for invalid page, false for permission fault
+ * @ra: host pc for unwinding
+ *
+ * Use the TCGCPUOps hook to record cpu state, do guest operating system
+ * specific things to raise SIGSEGV, and jump to the main cpu loop.
+ */
+G_NORETURN void cpu_loop_exit_sigsegv(CPUState *cpu, vaddr addr,
+                                      MMUAccessType access_type,
+                                      bool maperr, uintptr_t ra);
+
+/**
+ * cpu_loop_exit_sigbus:
+ * @cpu: the cpu context
+ * @addr: the guest address of the alignment fault
+ * @access_type: access was read/write/execute
+ * @ra: host pc for unwinding
+ *
+ * Use the TCGCPUOps hook to record cpu state, do guest operating system
+ * specific things to raise SIGBUS, and jump to the main cpu loop.
+ */
+G_NORETURN void cpu_loop_exit_sigbus(CPUState *cpu, vaddr addr,
+                                     MMUAccessType access_type,
+                                     uintptr_t ra);
+
+G_NORETURN void cpu_loop(CPUArchState *env);
+
+void target_exception_dump(CPUArchState *env, const char *fmt, int code);
+#define EXCP_DUMP(env, fmt, code) \
+    target_exception_dump(env, fmt, code)
+
+typedef struct target_pt_regs target_pt_regs;
+
+void target_cpu_copy_regs(CPUArchState *env, target_pt_regs *regs);
+
+#endif
diff --git a/include/user/guest-host.h b/include/user/guest-host.h
new file mode 100644
index 0000000..8f7ef75
--- /dev/null
+++ b/include/user/guest-host.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * guest <-> host helpers.
+ *
+ *  Copyright (c) 2003 Fabrice Bellard
+ */
+
+#ifndef USER_GUEST_HOST_H
+#define USER_GUEST_HOST_H
+
+#include "exec/vaddr.h"
+#include "user/guest-base.h"
+#include "accel/tcg/cpu-ops.h"
+
+/*
+ * If non-zero, the guest virtual address space is a contiguous subset
+ * of the host virtual address space, i.e. '-R reserved_va' is in effect
+ * either from the command-line or by default.  The value is the last
+ * byte of the guest address space e.g. UINT32_MAX.
+ *
+ * If zero, the host and guest virtual address spaces are intermingled.
+ */
+extern unsigned long reserved_va;
+
+/*
+ * The last byte of the guest address space.
+ * If reserved_va is non-zero, guest_addr_max matches.
+ * If reserved_va is zero, guest_addr_max equals the full guest space.
+ */
+extern unsigned long guest_addr_max;
+
+static inline vaddr cpu_untagged_addr(CPUState *cs, vaddr x)
+{
+    const TCGCPUOps *tcg_ops = cs->cc->tcg_ops;
+    if (tcg_ops->untagged_addr) {
+        return tcg_ops->untagged_addr(cs, x);
+    }
+    return x;
+}
+
+/* All direct uses of g2h and h2g need to go away for usermode softmmu.  */
+static inline void *g2h_untagged(vaddr x)
+{
+    return (void *)((uintptr_t)(x) + guest_base);
+}
+
+static inline void *g2h(CPUState *cs, vaddr x)
+{
+    return g2h_untagged(cpu_untagged_addr(cs, x));
+}
+
+static inline bool guest_addr_valid_untagged(vaddr x)
+{
+    return x <= guest_addr_max;
+}
+
+static inline bool guest_range_valid_untagged(vaddr start, vaddr len)
+{
+    return len - 1 <= guest_addr_max && start <= guest_addr_max - len + 1;
+}
+
+#define h2g_valid(x) \
+    ((uintptr_t)(x) - guest_base <= guest_addr_max)
+
+#define h2g_nocheck(x) ({ \
+    uintptr_t __ret = (uintptr_t)(x) - guest_base; \
+    (vaddr)__ret; \
+})
+
+#define h2g(x) ({ \
+    /* Check if given address fits target address space */ \
+    assert(h2g_valid(x)); \
+    h2g_nocheck(x); \
+})
+
+#endif
diff --git a/include/user/mmap.h b/include/user/mmap.h
new file mode 100644
index 0000000..4d5e9aa
--- /dev/null
+++ b/include/user/mmap.h
@@ -0,0 +1,32 @@
+/*
+ * MMAP declarations for QEMU user emulation
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#ifndef USER_MMAP_H
+#define USER_MMAP_H
+
+#include "user/abitypes.h"
+
+/*
+ * mmap_next_start: The base address for the next mmap without hint,
+ * increased after each successful map, starting at task_unmapped_base.
+ * This is an optimization within QEMU and not part of ADDR_COMPAT_LAYOUT.
+ */
+extern abi_ulong mmap_next_start;
+
+int target_mprotect(abi_ulong start, abi_ulong len, int prot);
+
+abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
+                     int flags, int fd, off_t offset);
+int target_munmap(abi_ulong start, abi_ulong len);
+abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
+                       abi_ulong new_size, unsigned long flags,
+                       abi_ulong new_addr);
+
+abi_ulong mmap_find_vma(abi_ulong start, abi_ulong size, abi_ulong alignment);
+
+void TSA_NO_TSA mmap_fork_start(void);
+void TSA_NO_TSA mmap_fork_end(int child);
+
+#endif
diff --git a/include/user/page-protection.h b/include/user/page-protection.h
new file mode 100644
index 0000000..4bde664
--- /dev/null
+++ b/include/user/page-protection.h
@@ -0,0 +1,96 @@
+/*
+ * QEMU page protection declarations.
+ *
+ *  Copyright (c) 2003 Fabrice Bellard
+ *
+ * SPDX-License-Identifier: LGPL-2.1+
+ */
+#ifndef USER_PAGE_PROTECTION_H
+#define USER_PAGE_PROTECTION_H
+
+#ifndef CONFIG_USER_ONLY
+#error Cannot include this header from system emulation
+#endif
+
+#include "exec/vaddr.h"
+#include "exec/translation-block.h"
+
+int page_unprotect(CPUState *cpu, tb_page_addr_t address, uintptr_t pc);
+
+int page_get_flags(vaddr address);
+
+/**
+ * page_set_flags:
+ * @start: first byte of range
+ * @last: last byte of range
+ * @flags: flags to set
+ * Context: holding mmap lock
+ *
+ * Modify the flags of a page and invalidate the code if necessary.
+ * The flag PAGE_WRITE_ORG is positioned automatically depending
+ * on PAGE_WRITE.  The mmap_lock should already be held.
+ */
+void page_set_flags(vaddr start, vaddr last, int flags);
+
+void page_reset_target_data(vaddr start, vaddr last);
+
+/**
+ * page_check_range
+ * @start: first byte of range
+ * @len: length of range
+ * @flags: flags required for each page
+ *
+ * Return true if every page in [@start, @start+@len) has @flags set.
+ * Return false if any page is unmapped.  Thus testing flags == 0 is
+ * equivalent to testing for flags == PAGE_VALID.
+ */
+bool page_check_range(vaddr start, vaddr last, int flags);
+
+/**
+ * page_check_range_empty:
+ * @start: first byte of range
+ * @last: last byte of range
+ * Context: holding mmap lock
+ *
+ * Return true if the entire range [@start, @last] is unmapped.
+ * The memory lock must be held so that the caller will can ensure
+ * the result stays true until a new mapping can be installed.
+ */
+bool page_check_range_empty(vaddr start, vaddr last);
+
+/**
+ * page_find_range_empty
+ * @min: first byte of search range
+ * @max: last byte of search range
+ * @len: size of the hole required
+ * @align: alignment of the hole required (power of 2)
+ *
+ * If there is a range [x, x+@len) within [@min, @max] such that
+ * x % @align == 0, then return x.  Otherwise return -1.
+ * The memory lock must be held, as the caller will want to ensure
+ * the returned range stays empty until a new mapping can be installed.
+ */
+vaddr page_find_range_empty(vaddr min, vaddr max, vaddr len, vaddr align);
+
+/**
+ * page_get_target_data
+ * @address: guest virtual address
+ * @size: per-page size
+ *
+ * Return @size bytes of out-of-band data to associate
+ * with the guest page at @address, allocating it if necessary.  The
+ * caller should already have verified that the address is valid.
+ * The value of @size must be the same for every call.
+ *
+ * The memory will be freed when the guest page is deallocated,
+ * e.g. with the munmap system call.
+ */
+__attribute__((returns_nonnull))
+void *page_get_target_data(vaddr address, size_t size);
+
+typedef int (*walk_memory_regions_fn)(void *, vaddr, vaddr, int);
+int walk_memory_regions(void *, walk_memory_regions_fn);
+
+void page_dump(FILE *f);
+
+#endif
diff --git a/include/user/signal.h b/include/user/signal.h
new file mode 100644
index 0000000..7fa33b0
--- /dev/null
+++ b/include/user/signal.h
@@ -0,0 +1,25 @@
+/*
+ * Signal-related declarations.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#ifndef USER_SIGNAL_H
+#define USER_SIGNAL_H
+
+#ifndef CONFIG_USER_ONLY
+#error Cannot include this header from system emulation
+#endif
+
+/**
+ * target_to_host_signal:
+ * @sig: target signal.
+ *
+ * On success, return the host signal between 0 (inclusive) and NSIG
+ * (exclusive) corresponding to the target signal @sig. Return any other value
+ * on failure.
+ */
+int target_to_host_signal(int sig);
+
+extern int host_interrupt_signal;
+
+#endif