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virtual memory access for gdbstub

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@581 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-01-24 15:23:36 +00:00
parent 3cf1e035ba
commit 13eb76e091
3 changed files with 152 additions and 49 deletions
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138
exec.c
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@ -1561,6 +1561,144 @@ int cpu_register_io_memory(int io_index,
return io_index << IO_MEM_SHIFT;
}
/* physical memory access (slow version, mainly for debug) */
#if defined(CONFIG_USER_ONLY)
void cpu_physical_memory_rw(CPUState *env, uint8_t *buf, target_ulong addr,
int len, int is_write)
{
int l, flags;
target_ulong page;
while (len > 0) {
page = addr & TARGET_PAGE_MASK;
l = (page + TARGET_PAGE_SIZE) - addr;
if (l > len)
l = len;
flags = page_get_flags(page);
if (!(flags & PAGE_VALID))
return;
if (is_write) {
if (!(flags & PAGE_WRITE))
return;
memcpy((uint8_t *)addr, buf, len);
} else {
if (!(flags & PAGE_READ))
return;
memcpy(buf, (uint8_t *)addr, len);
}
len -= l;
buf += l;
addr += l;
}
}
#else
void cpu_physical_memory_rw(CPUState *env, uint8_t *buf, target_ulong addr,
int len, int is_write)
{
int l, io_index;
uint8_t *ptr;
uint32_t val;
target_ulong page, pd;
PageDesc *p;
while (len > 0) {
page = addr & TARGET_PAGE_MASK;
l = (page + TARGET_PAGE_SIZE) - addr;
if (l > len)
l = len;
p = page_find(page >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
if (is_write) {
if ((pd & ~TARGET_PAGE_MASK) != 0) {
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
if (l >= 4 && ((addr & 3) == 0)) {
/* 32 bit read access */
val = ldl_raw(buf);
io_mem_write[io_index][2](addr, val);
l = 4;
} else if (l >= 2 && ((addr & 1) == 0)) {
/* 16 bit read access */
val = lduw_raw(buf);
io_mem_write[io_index][1](addr, val);
l = 2;
} else {
/* 8 bit access */
val = ldub_raw(buf);
io_mem_write[io_index][0](addr, val);
l = 1;
}
} else {
/* RAM case */
ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) +
(addr & ~TARGET_PAGE_MASK);
memcpy(ptr, buf, l);
}
} else {
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
(pd & ~TARGET_PAGE_MASK) != IO_MEM_CODE) {
/* I/O case */
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
if (l >= 4 && ((addr & 3) == 0)) {
/* 32 bit read access */
val = io_mem_read[io_index][2](addr);
stl_raw(buf, val);
l = 4;
} else if (l >= 2 && ((addr & 1) == 0)) {
/* 16 bit read access */
val = io_mem_read[io_index][1](addr);
stw_raw(buf, val);
l = 2;
} else {
/* 8 bit access */
val = io_mem_read[io_index][0](addr);
stb_raw(buf, val);
l = 1;
}
} else {
/* RAM case */
ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) +
(addr & ~TARGET_PAGE_MASK);
memcpy(buf, ptr, l);
}
}
len -= l;
buf += l;
addr += l;
}
}
#endif
/* virtual memory access for debug */
int cpu_memory_rw_debug(CPUState *env,
uint8_t *buf, target_ulong addr, int len, int is_write)
{
int l;
target_ulong page, phys_addr;
while (len > 0) {
page = addr & TARGET_PAGE_MASK;
phys_addr = cpu_get_phys_page_debug(env, page);
/* if no physical page mapped, return an error */
if (phys_addr == -1)
return -1;
l = (page + TARGET_PAGE_SIZE) - addr;
if (l > len)
l = len;
cpu_physical_memory_rw(env, buf,
phys_addr + (addr & ~TARGET_PAGE_MASK), l,
is_write);
len -= l;
buf += l;
addr += l;
}
return 0;
}
#if !defined(CONFIG_USER_ONLY)
#define MMUSUFFIX _cmmu