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winedbg: Add helper to transfer memory between lvalues. 

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Eric Pouech 2021-12-08 14:44:27 +01:00 committed by Alexandre Julliard
parent c4548c04eb
commit 860de95630
3 changed files with 35 additions and 16 deletions
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1
programs/winedbg/debugger.h
View File

@ -392,6 +392,7 @@ extern void info_wine_dbg_channel(BOOL add, const char* chnl, const
/* memory.c */
extern BOOL memory_read_value(const struct dbg_lvalue* lvalue, DWORD size, void* result);
extern BOOL memory_write_value(const struct dbg_lvalue* val, DWORD size, void* value);
extern BOOL memory_transfer_value(const struct dbg_lvalue* to, const struct dbg_lvalue* from);
extern BOOL memory_fetch_integer(const struct dbg_lvalue* lvalue, unsigned size,
BOOL is_signed, dbg_lgint_t* ret);
extern BOOL memory_store_integer(const struct dbg_lvalue* lvalue, dbg_lgint_t val);

31
programs/winedbg/memory.c
View File

@ -133,6 +133,37 @@ BOOL memory_write_value(const struct dbg_lvalue* lvalue, DWORD size, void* value
return ret;
}
/* transfer a block of memory
* the two lvalue:s are expected to be of same size
*/
BOOL memory_transfer_value(const struct dbg_lvalue* to, const struct dbg_lvalue* from)
{
DWORD64 size_to, size_from;
BYTE tmp[256];
BYTE* ptr = tmp;
BOOL ret;
if (to->bitlen || from->bitlen) return FALSE;
if (!types_get_info(&to->type, TI_GET_LENGTH, &size_to) ||
!types_get_info(&from->type, TI_GET_LENGTH, &size_from) ||
size_from != size_to) return FALSE;
/* optimize debugger to debugger transfer */
if (!to->in_debuggee && !from->in_debuggee)
{
memcpy(memory_to_linear_addr(&to->addr), memory_to_linear_addr(&from->addr), size_from);
return TRUE;
}
if (size_to > sizeof(tmp))
{
ptr = malloc(size_from);
if (!ptr) return FALSE;
}
ret = memory_read_value(from, size_from, ptr) &&
memory_write_value(to, size_from, ptr);
if (size_to > sizeof(tmp)) free(ptr);
return ret;
}
/***********************************************************************
* memory_examine
*

19
programs/winedbg/types.c
View File

@ -162,30 +162,17 @@ void types_extract_as_address(const struct dbg_lvalue* lvalue, ADDRESS64* addr)
BOOL types_store_value(struct dbg_lvalue* lvalue_to, const struct dbg_lvalue* lvalue_from)
{
dbg_lgint_t val;
DWORD64 size;
BOOL equal;
if (!lvalue_to->bitlen && !lvalue_from->bitlen)
{
BOOL equal;
if (!types_compare(lvalue_to->type, lvalue_from->type, &equal)) return FALSE;
if (equal)
{
if (!types_get_info(&lvalue_to->type, TI_GET_LENGTH, &size)) return FALSE;
if (sizeof(val) < size)
{
return memory_read_value(lvalue_from, size, &val) &&
memory_write_value(lvalue_to, size, &val);
}
dbg_printf("NIY\n");
/* else: should allocate intermediate buffer... */
return FALSE;
}
return memory_transfer_value(lvalue_to, lvalue_from);
}
if (types_is_integral_type(lvalue_from) && types_is_integral_type(lvalue_to))
{
/* doing integer conversion (about sign, size) */
val = types_extract_as_integer(lvalue_from);
dbg_lgint_t val = types_extract_as_integer(lvalue_from);
return memory_store_integer(lvalue_to, val);
}
/* FIXME: should support floats as well */