-// vim:shiftwidth=2:expandtab
+/*
+ * GINGE - GINGE Is Not Gp2x Emulator
+ * (C) notaz, 2010-2011,2016
+ *
+ * This work is licensed under the MAME license, see COPYING file for details.
+ */
// a "gentle" reminder
#ifdef __ARM_EABI__
#error loader is meant to be OABI!
#include <stdlib.h>
#include <string.h>
#include <alloca.h>
+#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include <asm/ucontext.h>
-#include <pthread.h>
#include <errno.h>
#include <time.h>
+#include <sched.h>
#include <sys/resource.h>
#include <sys/ioctl.h>
+#include <sys/syscall.h>
#include <linux/soundcard.h>
#include <linux/fb.h>
+#include <linux/futex.h>
#include "header.h"
#include "../common/host_fb.h"
#include "../common/cmn.h"
-#include "sys_cacheflush.h"
+#include "syscalls.h"
#include "realfuncs.h"
+#include "llibc.h"
#if (DBG & 2) && !(DBG & 4)
#define LOG_IO_UNK
#endif
#ifdef LOG_SEGV
-#define segvlog printf
+#define segvlog g_printf
#else
#define segvlog(...)
#endif
typedef unsigned short u16;
typedef unsigned char u8;
-static pthread_mutex_t fb_mutex = PTHREAD_MUTEX_INITIALIZER;
-static pthread_cond_t fb_cond = PTHREAD_COND_INITIALIZER;
+#define THREAD_STACK_SIZE 0x200000
+
+static int fb_sync_thread_paused;
+static int fb_sync_thread_futex;
static struct {
u32 dstctrl;
if ((a & ~0xffff) == 0x7f000000)
reg = regnames[a & 0xffff];
- printf(fmt, pfx, a, d, reg);
+ g_printf(fmt, pfx, a, d, reg);
}
#endif
u32 *r = &blitter.dstctrl; \
int i; \
for (i = 0; i < 4*4; i++, r++) { \
- printf("%08x ", *r); \
+ g_printf("%08x ", *r); \
if ((i & 3) == 3) \
- printf("\n"); \
+ g_printf("\n"); \
} \
}
}
}
- if (to_screen)
- pthread_cond_signal(&fb_cond);
+ if (to_screen) {
+ fb_sync_thread_futex = 1;
+ g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
+ }
return;
bad_blit:
}
}
-#define ts_add_nsec(ts, ns) { \
- ts.tv_nsec += ns; \
- if (ts.tv_nsec >= 1000000000) { \
- ts.tv_sec++; \
- ts.tv_nsec -= 1000000000; \
- } \
-}
-
-static int fb_sync_thread_paused;
-
static void *fb_sync_thread(void *arg)
{
+ unsigned long sigmask[2] = { ~0ul, ~0ul };
+ struct timespec ts = { 0, 0 };
int invalid_fb_addr = 1;
int manual_refresh = 0;
int frame_counter = 0;
- struct timespec ts;
- int ret, wait_ret;
+ int wait_ret;
+
+ // this thread can't run any signal handlers since the
+ // app's stack/tls stuff will never be set up here
+ sigmask[0] &= ~(1ul << (SIGSEGV - 1));
+ g_rt_sigprocmask_raw(SIG_SETMASK, sigmask, NULL, sizeof(sigmask));
- //ret = pthread_setschedprio(pthread_self(), -1);
- //log("pthread_setschedprio %d\n", ret);
//ret = setpriority(PRIO_PROCESS, 0, -1);
//log("setpriority %d\n", ret);
- ret = clock_gettime(CLOCK_REALTIME, &ts);
- if (ret != 0) {
- perror(PFX "clock_gettime");
- exit(1);
- }
+ // tell the main thread we're done init
+ fb_sync_thread_futex = 0;
+ g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
while (1) {
u8 *gp2x_fb, *gp2x_fb_end;
- ret = pthread_mutex_lock(&fb_mutex);
- wait_ret = pthread_cond_timedwait(&fb_cond, &fb_mutex, &ts);
- ret |= pthread_mutex_unlock(&fb_mutex);
+ wait_ret = g_futex_raw(&fb_sync_thread_futex, FUTEX_WAIT, 0, &ts);
- if (ret != 0) {
- err("fb_thread: mutex error: %d\n", ret);
- sleep(1);
- goto check_keys;
- }
- if (wait_ret != 0 && wait_ret != ETIMEDOUT) {
- err("fb_thread: cond error: %d\n", wait_ret);
- sleep(1);
+ // this is supposed to be done atomically, but to make life
+ // easier ignore it for now, race impact is low anyway
+ fb_sync_thread_futex = 0;
+
+ if (wait_ret != 0 && wait_ret != -EWOULDBLOCK
+ && wait_ret != -ETIMEDOUT)
+ {
+ err("fb_thread: futex error: %d\n", wait_ret);
+ g_sleep(1);
goto check_keys;
}
if (fb_sync_thread_paused) {
- ts_add_nsec(ts, 100000000);
+ ts.tv_nsec = 100000000;
goto check_keys;
}
- if (wait_ret != ETIMEDOUT) {
- clock_gettime(CLOCK_REALTIME, &ts);
- ts_add_nsec(ts, 50000000);
+ if (wait_ret == 0) {
+ ts.tv_nsec = 50000000;
manual_refresh++;
if (manual_refresh == 2)
dbg("fb_thread: switch to manual refresh\n");
} else {
- ts_add_nsec(ts, 16666667);
+ ts.tv_nsec = 16666667;
if (manual_refresh > 1)
dbg("fb_thread: switch to auto refresh\n");
manual_refresh = 0;
switch (a_) {
case 0x0a00: // TCOUNT, 1/7372800s
- clock_gettime(CLOCK_REALTIME, &ts);
+ g_clock_gettime_raw(CLOCK_REALTIME, &ts);
t64 = (u64)ts.tv_sec * 1000000000 + ts.tv_nsec;
// t * 7372800.0 / 1000000000 * 0x100000000 ~= t * 31665935
t64 *= 31665935;
return;
case 0x2914:
mmsp2.mlc_stl_adrh = d;
- if (mmsp2.mlc_stl_adr != mmsp2.old_mlc_stl_adr)
+ if (mmsp2.mlc_stl_adr != mmsp2.old_mlc_stl_adr) {
// ask for refresh
- pthread_cond_signal(&fb_cond);
+ fb_sync_thread_futex = 1;
+ g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
+ }
mmsp2.old_mlc_stl_adr = mmsp2.mlc_stl_adr;
return;
case 0x2958:
case 0x4038: // MLCADDRESS0
case 0x406c: // MLCADDRESS1
pollux.mlc_stl_adr = d;
- if (d != mmsp2.old_mlc_stl_adr)
+ if (d != mmsp2.old_mlc_stl_adr) {
// ask for refresh
- pthread_cond_signal(&fb_cond);
+ fb_sync_thread_futex = 1;
+ g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
+ }
mmsp2.old_mlc_stl_adr = d;
return;
case 0x403c: // MLCPALETTE0
static u32 *g_code_ptr;
static int g_linkpage_count;
+enum opcond {
+ C_EQ, C_NE, C_CS, C_CC, C_MI, C_PL, C_VS, C_VC,
+ C_HI, C_LS, C_GE, C_LT, C_GT, C_LE, C_AL,
+};
+enum cpsr_cond {
+ CPSR_N = (1u << 31),
+ CPSR_Z = (1u << 30),
+ CPSR_C = (1u << 29),
+ CPSR_V = (1u << 28),
+};
+
#define BIT_SET(v, b) (v & (1 << (b)))
void emu_handle_op(struct op_context *op_ctx, struct op_stackframe *sframe)
{
u32 *regs = sframe->saved_regs;
+ u32 cpsr = sframe->cpsr;
u32 op = op_ctx->op;
u32 t, shift, ret, addr;
- int rn, rd;
+ int i, rn, rd, cond;
+ cond = (op & 0xf0000000) >> 28;
rd = (op & 0x0000f000) >> 12;
rn = (op & 0x000f0000) >> 16;
+ if (cond != 0x0e) {
+ switch (cond) {
+ case C_EQ: if ( (cpsr & CPSR_Z)) break; return;
+ case C_NE: if (!(cpsr & CPSR_Z)) break; return;
+ case C_CS: if ( (cpsr & CPSR_C)) break; return;
+ case C_CC: if (!(cpsr & CPSR_C)) break; return;
+ case C_MI: if ( (cpsr & CPSR_N)) break; return;
+ case C_PL: if (!(cpsr & CPSR_N)) break; return;
+ case C_VS: if ( (cpsr & CPSR_V)) break; return;
+ case C_VC: if (!(cpsr & CPSR_V)) break; return;
+ default:
+ goto unhandled;
+ }
+ }
+
if ((op & 0x0f200090) == 0x01000090) { // AM3: LDRH, STRH
if (!BIT_SET(op, 5)) // !H
goto unhandled;
else
xwrite16(addr, regs[rd]);
}
- else if ((op & 0x0d200000) == 0x05000000) { // AM2: LDR[B], STR[B]
+ else if ((op & 0x0c000000) == 0x04000000) { // load/store word/byte
+ if (BIT_SET(op, 21))
+ goto unhandled; // unprivileged
if (BIT_SET(op, 25)) { // reg offs
if (BIT_SET(op, 4))
- goto unhandled;
+ goto unhandled; // nah it's media
t = regs[op & 0x000f];
shift = (op & 0x0f80) >> 7;
if (!BIT_SET(op, 23))
t = -t;
- addr = regs[rn] + t;
+
+ addr = regs[rn];
+ if (BIT_SET(op, 24)) // pre-indexed
+ addr += t;
+ if (!BIT_SET(op, 24) || BIT_SET(op, 21))
+ regs[rn] += t; // writeback
if (BIT_SET(op, 20)) { // Load
if (BIT_SET(op, 22)) // Byte
unhandled:
err("unhandled IO op %08x @ %08x\n", op, op_ctx->pc);
+ for (i = 0; i < 8-1; i++)
+ err(" r%d=%08x r%-2d=%08x\n", i, regs[i], i+8, regs[i+8]);
+ err(" r%d=%08x cpsr=%08x\n", i, regs[i], cpsr);
+ abort();
}
static u32 make_offset12(u32 *pc, u32 *target)
// real crash - time to die
err("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
for (i = 0; i < 8; i++)
- dbg(" r%d=%08x r%2d=%08x\n", i, regs[i], i+8, regs[i+8]);
+ dbg(" r%d=%08x r%-2d=%08x\n", i, regs[i], i+8, regs[i+8]);
signal(num, SIG_DFL);
raise(num);
return;
.sa_sigaction = segv_sigaction,
.sa_flags = SA_SIGINFO,
};
- pthread_t tid;
void *pret;
int ret;
exit(1);
}
- ret = pthread_create(&tid, NULL, fb_sync_thread, NULL);
- if (ret != 0) {
- err("failed to create fb_sync_thread: %d\n", ret);
+ pret = mmap(NULL, THREAD_STACK_SIZE, PROT_READ|PROT_WRITE|PROT_EXEC,
+ MAP_PRIVATE|MAP_ANONYMOUS|MAP_GROWSDOWN, -1, 0);
+ if (mmsp2.umem == MAP_FAILED) {
+ perror(PFX "mmap thread stack");
+ exit(1);
+ }
+ fb_sync_thread_futex = 1;
+ ret = g_clone(CLONE_VM | CLONE_FS | CLONE_FILES
+ | CLONE_SIGHAND | CLONE_THREAD,
+ (char *)pret + THREAD_STACK_SIZE, 0, 0, 0,
+ fb_sync_thread);
+ if (ret == 0 || ret == -1) {
+ perror(PFX "start fb thread");
exit(1);
}
- pthread_detach(tid);
+ g_futex_raw(&fb_sync_thread_futex, FUTEX_WAIT, 1, NULL);
// defaults
mmsp2.mlc_stl_adr = 0x03101000; // fb2 is at 0x03381000
err("warning: uppermem @ %08x overflows by %d bytes\n",
offset, umem + length - umem_end);
- dbg("upper mem @ %08x %d\n", offset, length);
+ dbg("upper mem @ %08x %x = %p\n", offset, length, umem);
return umem;
}
return MAP_FAILED;
}
+int emu_do_munmap(void *addr, unsigned int length)
+{
+ u8 *p = addr;
+
+ // don't allow to unmap upper mem
+ if ((u8 *)mmsp2.umem <= p && p < (u8 *)mmsp2.umem + 0x2000000) {
+ dbg("ignoring munmap: %p %x\n", addr, length);
+ return 0;
+ }
+
+ return -EAGAIN;
+}
+
static void emu_sound_open(int fd)
{
#ifdef PND
const char *from;
const char *to;
} path_map[] = {
- { "/mnt/tmp/", "/tmp/" },
+ { "/mnt/tmp", "./tmp" },
};
static const char *wrap_path(const char *path)
{
- char *buff;
+ char *buff, *p;
size_t size;
int i, len;
// do only path mapping for now
for (i = 0; i < ARRAY_SIZE(path_map); i++) {
- len = strlen(path_map[i].from);
- if (strncmp(path, path_map[i].from, len) == 0) {
+ p = strstr(path, path_map[i].from);
+ if (p != NULL) {
size = strlen(path) + strlen(path_map[i].to) + 1;
buff = malloc(size);
if (buff == NULL)
break;
- snprintf(buff, size, "%s%s", path_map[i].to, path + len);
+ len = p - path;
+ strncpy(buff, path, len);
+ snprintf(buff + len, size - len, "%s%s", path_map[i].to,
+ path + len + strlen(path_map[i].from));
dbg("mapped path \"%s\" -> \"%s\"\n", path, buff);
return buff;
}
int emu_do_system(const char *command)
{
static char tmp_path[512];
+ int need_ginge = 0;
const char *p2;
char *p;
int ret;
if (command == NULL)
return -1;
- // pass through stuff in PATH
- p = strchr(command, ' ');
- p2 = strchr(command, '/');
- if (p2 == NULL || (p != NULL && p2 > p))
- return system(command);
+ for (p2 = command; *p2 && isspace(*p2); p2++)
+ ;
- make_local_path(tmp_path, sizeof(tmp_path), "ginge_prep");
- p = tmp_path + strlen(tmp_path);
+ if (*p2 == '.') // relative path?
+ need_ginge = 1;
+ else if (*p2 == '/' && strncmp(p2, "/bin", 4) && strncmp(p2, "/lib", 4)
+ && strncmp(p2, "/sbin", 4) && strncmp(p2, "/usr", 4))
+ // absolute path, but not a system command
+ need_ginge = 1;
p2 = wrap_path(command);
- snprintf(p, sizeof(tmp_path) - (p - tmp_path), " --nomenu %s", p2);
+ if (need_ginge) {
+ make_local_path(tmp_path, sizeof(tmp_path), "ginge_prep");
+ p = tmp_path + strlen(tmp_path);
+
+ snprintf(p, sizeof(tmp_path) - (p - tmp_path), " --nomenu %s", p2);
+ }
+ else
+ snprintf(tmp_path, sizeof(tmp_path), "%s", p2);
wrap_path_free(p2, command);
dbg("system: \"%s\"\n", tmp_path);
return ret;
}
+// vim:shiftwidth=2:expandtab
notaz.gp2x.de / ginge.git / blobdiff