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qemu/target/xtensa/xtensa-semi.c
Thomas Huth 3b51b50668 target/xtensa/xtensa-semi: Fix compilation problem on Haiku 
The errno numbers are very large on Haiku, so the linking currently
fails there with a "final link failed: memory exhausted" error
message. We should not use the errno number as array indexes here,
thus convert the code to a switch-case statement instead. A clever
compiler should be able to optimize this code in a similar way
anway.

Reported-by: Richard Zak <richard.j.zak@gmail.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210706081822.1316551-1-thuth@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-07-09 18:42:46 +02:00

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/*
* Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Open Source and Linux Lab nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "chardev/char-fe.h"
#include "exec/helper-proto.h"
#include "semihosting/semihost.h"
#include "qapi/error.h"
#include "qemu/log.h"
enum {
TARGET_SYS_exit = 1,
TARGET_SYS_read = 3,
TARGET_SYS_write = 4,
TARGET_SYS_open = 5,
TARGET_SYS_close = 6,
TARGET_SYS_lseek = 19,
TARGET_SYS_select_one = 29,
TARGET_SYS_argc = 1000,
TARGET_SYS_argv_sz = 1001,
TARGET_SYS_argv = 1002,
TARGET_SYS_memset = 1004,
};
enum {
SELECT_ONE_READ = 1,
SELECT_ONE_WRITE = 2,
SELECT_ONE_EXCEPT = 3,
};
enum {
TARGET_EPERM = 1,
TARGET_ENOENT = 2,
TARGET_ESRCH = 3,
TARGET_EINTR = 4,
TARGET_EIO = 5,
TARGET_ENXIO = 6,
TARGET_E2BIG = 7,
TARGET_ENOEXEC = 8,
TARGET_EBADF = 9,
TARGET_ECHILD = 10,
TARGET_EAGAIN = 11,
TARGET_ENOMEM = 12,
TARGET_EACCES = 13,
TARGET_EFAULT = 14,
TARGET_ENOTBLK = 15,
TARGET_EBUSY = 16,
TARGET_EEXIST = 17,
TARGET_EXDEV = 18,
TARGET_ENODEV = 19,
TARGET_ENOTDIR = 20,
TARGET_EISDIR = 21,
TARGET_EINVAL = 22,
TARGET_ENFILE = 23,
TARGET_EMFILE = 24,
TARGET_ENOTTY = 25,
TARGET_ETXTBSY = 26,
TARGET_EFBIG = 27,
TARGET_ENOSPC = 28,
TARGET_ESPIPE = 29,
TARGET_EROFS = 30,
TARGET_EMLINK = 31,
TARGET_EPIPE = 32,
TARGET_EDOM = 33,
TARGET_ERANGE = 34,
TARGET_ENOSYS = 88,
TARGET_ELOOP = 92,
};
static uint32_t errno_h2g(int host_errno)
{
switch (host_errno) {
case 0: return 0;
case EPERM: return TARGET_EPERM;
case ENOENT: return TARGET_ENOENT;
case ESRCH: return TARGET_ESRCH;
case EINTR: return TARGET_EINTR;
case EIO: return TARGET_EIO;
case ENXIO: return TARGET_ENXIO;
case E2BIG: return TARGET_E2BIG;
case ENOEXEC: return TARGET_ENOEXEC;
case EBADF: return TARGET_EBADF;
case ECHILD: return TARGET_ECHILD;
case EAGAIN: return TARGET_EAGAIN;
case ENOMEM: return TARGET_ENOMEM;
case EACCES: return TARGET_EACCES;
case EFAULT: return TARGET_EFAULT;
#ifdef ENOTBLK
case ENOTBLK: return TARGET_ENOTBLK;
#endif
case EBUSY: return TARGET_EBUSY;
case EEXIST: return TARGET_EEXIST;
case EXDEV: return TARGET_EXDEV;
case ENODEV: return TARGET_ENODEV;
case ENOTDIR: return TARGET_ENOTDIR;
case EISDIR: return TARGET_EISDIR;
case EINVAL: return TARGET_EINVAL;
case ENFILE: return TARGET_ENFILE;
case EMFILE: return TARGET_EMFILE;
case ENOTTY: return TARGET_ENOTTY;
#ifdef ETXTBSY
case ETXTBSY: return TARGET_ETXTBSY;
#endif
case EFBIG: return TARGET_EFBIG;
case ENOSPC: return TARGET_ENOSPC;
case ESPIPE: return TARGET_ESPIPE;
case EROFS: return TARGET_EROFS;
case EMLINK: return TARGET_EMLINK;
case EPIPE: return TARGET_EPIPE;
case EDOM: return TARGET_EDOM;
case ERANGE: return TARGET_ERANGE;
case ENOSYS: return TARGET_ENOSYS;
#ifdef ELOOP
case ELOOP: return TARGET_ELOOP;
#endif
};
return TARGET_EINVAL;
}
typedef struct XtensaSimConsole {
CharBackend be;
struct {
char buffer[16];
size_t offset;
} input;
} XtensaSimConsole;
static XtensaSimConsole *sim_console;
static IOCanReadHandler sim_console_can_read;
static int sim_console_can_read(void *opaque)
{
XtensaSimConsole *p = opaque;
return sizeof(p->input.buffer) - p->input.offset;
}
static IOReadHandler sim_console_read;
static void sim_console_read(void *opaque, const uint8_t *buf, int size)
{
XtensaSimConsole *p = opaque;
size_t copy = sizeof(p->input.buffer) - p->input.offset;
if (size < copy) {
copy = size;
}
memcpy(p->input.buffer + p->input.offset, buf, copy);
p->input.offset += copy;
}
void xtensa_sim_open_console(Chardev *chr)
{
static XtensaSimConsole console;
qemu_chr_fe_init(&console.be, chr, &error_abort);
qemu_chr_fe_set_handlers(&console.be,
sim_console_can_read,
sim_console_read,
NULL, NULL, &console,
NULL, true);
sim_console = &console;
}
void HELPER(simcall)(CPUXtensaState *env)
{
CPUState *cs = env_cpu(env);
uint32_t *regs = env->regs;
switch (regs[2]) {
case TARGET_SYS_exit:
exit(regs[3]);
break;
case TARGET_SYS_read:
case TARGET_SYS_write:
{
bool is_write = regs[2] == TARGET_SYS_write;
uint32_t fd = regs[3];
uint32_t vaddr = regs[4];
uint32_t len = regs[5];
uint32_t len_done = 0;
while (len > 0) {
hwaddr paddr = cpu_get_phys_page_debug(cs, vaddr);
uint32_t page_left =
TARGET_PAGE_SIZE - (vaddr & (TARGET_PAGE_SIZE - 1));
uint32_t io_sz = page_left < len ? page_left : len;
hwaddr sz = io_sz;
void *buf = cpu_physical_memory_map(paddr, &sz, !is_write);
uint32_t io_done;
bool error = false;
if (buf) {
vaddr += io_sz;
len -= io_sz;
if (fd < 3 && sim_console) {
if (is_write && (fd == 1 || fd == 2)) {
io_done = qemu_chr_fe_write_all(&sim_console->be,
buf, io_sz);
regs[3] = errno_h2g(errno);
} else if (!is_write && fd == 0) {
if (sim_console->input.offset) {
io_done = sim_console->input.offset;
if (io_sz < io_done) {
io_done = io_sz;
}
memcpy(buf, sim_console->input.buffer, io_done);
memmove(sim_console->input.buffer,
sim_console->input.buffer + io_done,
sim_console->input.offset - io_done);
sim_console->input.offset -= io_done;
qemu_chr_fe_accept_input(&sim_console->be);
} else {
io_done = -1;
regs[3] = TARGET_EAGAIN;
}
} else {
qemu_log_mask(LOG_GUEST_ERROR,
"%s fd %d is not supported with chardev console\n",
is_write ?
"writing to" : "reading from", fd);
io_done = -1;
regs[3] = TARGET_EBADF;
}
} else {
io_done = is_write ?
write(fd, buf, io_sz) :
read(fd, buf, io_sz);
regs[3] = errno_h2g(errno);
}
if (io_done == -1) {
error = true;
io_done = 0;
}
cpu_physical_memory_unmap(buf, sz, !is_write, io_done);
} else {
error = true;
regs[3] = TARGET_EINVAL;
break;
}
if (error) {
if (!len_done) {
len_done = -1;
}
break;
}
len_done += io_done;
if (io_done < io_sz) {
break;
}
}
regs[2] = len_done;
}
break;
case TARGET_SYS_open:
{
char name[1024];
int rc;
int i;
for (i = 0; i < ARRAY_SIZE(name); ++i) {
rc = cpu_memory_rw_debug(cs, regs[3] + i,
(uint8_t *)name + i, 1, 0);
if (rc != 0 || name[i] == 0) {
break;
}
}
if (rc == 0 && i < ARRAY_SIZE(name)) {
regs[2] = open(name, regs[4], regs[5]);
regs[3] = errno_h2g(errno);
} else {
regs[2] = -1;
regs[3] = TARGET_EINVAL;
}
}
break;
case TARGET_SYS_close:
if (regs[3] < 3) {
regs[2] = regs[3] = 0;
} else {
regs[2] = close(regs[3]);
regs[3] = errno_h2g(errno);
}
break;
case TARGET_SYS_lseek:
regs[2] = lseek(regs[3], (off_t)(int32_t)regs[4], regs[5]);
regs[3] = errno_h2g(errno);
break;
case TARGET_SYS_select_one:
{
uint32_t fd = regs[3];
uint32_t rq = regs[4];
uint32_t target_tv = regs[5];
uint32_t target_tvv[2];
struct timeval tv = {0};
if (target_tv) {
cpu_memory_rw_debug(cs, target_tv,
(uint8_t *)target_tvv, sizeof(target_tvv), 0);
tv.tv_sec = (int32_t)tswap32(target_tvv[0]);
tv.tv_usec = (int32_t)tswap32(target_tvv[1]);
}
if (fd < 3 && sim_console) {
if ((fd == 1 || fd == 2) && rq == SELECT_ONE_WRITE) {
regs[2] = 1;
} else if (fd == 0 && rq == SELECT_ONE_READ) {
regs[2] = sim_console->input.offset > 0;
} else {
regs[2] = 0;
}
regs[3] = 0;
} else {
fd_set fdset;
FD_ZERO(&fdset);
FD_SET(fd, &fdset);
regs[2] = select(fd + 1,
rq == SELECT_ONE_READ ? &fdset : NULL,
rq == SELECT_ONE_WRITE ? &fdset : NULL,
rq == SELECT_ONE_EXCEPT ? &fdset : NULL,
target_tv ? &tv : NULL);
regs[3] = errno_h2g(errno);
}
}
break;
case TARGET_SYS_argc:
regs[2] = semihosting_get_argc();
regs[3] = 0;
break;
case TARGET_SYS_argv_sz:
{
int argc = semihosting_get_argc();
int sz = (argc + 1) * sizeof(uint32_t);
int i;
for (i = 0; i < argc; ++i) {
sz += 1 + strlen(semihosting_get_arg(i));
}
regs[2] = sz;
regs[3] = 0;
}
break;
case TARGET_SYS_argv:
{
int argc = semihosting_get_argc();
int str_offset = (argc + 1) * sizeof(uint32_t);
int i;
uint32_t argptr;
for (i = 0; i < argc; ++i) {
const char *str = semihosting_get_arg(i);
int str_size = strlen(str) + 1;
argptr = tswap32(regs[3] + str_offset);
cpu_memory_rw_debug(cs,
regs[3] + i * sizeof(uint32_t),
(uint8_t *)&argptr, sizeof(argptr), 1);
cpu_memory_rw_debug(cs,
regs[3] + str_offset,
(uint8_t *)str, str_size, 1);
str_offset += str_size;
}
argptr = 0;
cpu_memory_rw_debug(cs,
regs[3] + i * sizeof(uint32_t),
(uint8_t *)&argptr, sizeof(argptr), 1);
regs[3] = 0;
}
break;
case TARGET_SYS_memset:
{
uint32_t base = regs[3];
uint32_t sz = regs[5];
while (sz) {
hwaddr len = sz;
void *buf = cpu_physical_memory_map(base, &len, 1);
if (buf && len) {
memset(buf, regs[4], len);
cpu_physical_memory_unmap(buf, len, 1, len);
} else {
len = 1;
}
base += len;
sz -= len;
}
regs[2] = regs[3];
regs[3] = 0;
}
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s(%d): not implemented\n", __func__, regs[2]);
regs[2] = -1;
regs[3] = TARGET_ENOSYS;
break;
}
}
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