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dbghelp/dwarf: Properly detect base address selection in AT_ranges. 

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Eric Pouech 2021-09-21 07:59:54 +02:00 committed by Alexandre Julliard
parent ab8fdb191c
commit 69d07126fe
1 changed files with 5 additions and 3 deletions
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8
dlls/dbghelp/dwarf.c
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@ -1209,26 +1209,28 @@ static BOOL dwarf2_read_range(dwarf2_parse_context_t* ctx, const dwarf2_debug_in
{
dwarf2_traverse_context_t traverse;
ULONG_PTR low, high;
const ULONG_PTR UMAX = ~(ULONG_PTR)0u;
traverse.data = ctx->module_ctx->sections[section_ranges].address + range.u.uvalue;
traverse.end_data = ctx->module_ctx->sections[section_ranges].address +
ctx->module_ctx->sections[section_ranges].size;
*plow = ULONG_MAX;
*plow = UMAX;
*phigh = 0;
while (traverse.data + 2 * ctx->head.word_size < traverse.end_data)
{
low = dwarf2_parse_addr_head(&traverse, &ctx->head);
high = dwarf2_parse_addr_head(&traverse, &ctx->head);
if (low == 0 && high == 0) break;
if (low == ULONG_MAX) FIXME("unsupported yet (base address selection)\n");
if (low == (ctx->head.word_size == 8 ? (~(DWORD64)0u) : (DWORD64)(~0u)))
FIXME("unsupported yet (base address selection)\n");
/* range values are relative to start of compilation unit */
low += ctx->compiland->address - ctx->module_ctx->load_offset;
high += ctx->compiland->address - ctx->module_ctx->load_offset;
if (low < *plow) *plow = low;
if (high > *phigh) *phigh = high;
}
if (*plow == ULONG_MAX || *phigh == 0) {FIXME("no entry found\n"); return FALSE;}
if (*plow == UMAX || *phigh == 0) {FIXME("no entry found\n"); return FALSE;}
if (*plow == *phigh) {FIXME("entry found, but low=high\n"); return FALSE;}
return TRUE;