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Code Issues Releases Activity

kern: allow QueryIoMapping to find Static mappings

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This commit is contained in:
Michael Scire 2023-02-21 08:06:12 -07:00 committed by SciresM
parent 8ffc177b44
commit ed22f802ee
1 changed files with 9 additions and 4 deletions
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13
libraries/libmesosphere/source/svc/kern_svc_address_translation.cpp
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@ -48,7 +48,7 @@ namespace ams::kern::svc {
/* Check whether the address is aligned. */
const bool aligned = util::IsAligned(phys_addr, PageSize);
auto QueryIoMappingFromPageTable = [&](uint64_t phys_addr, size_t size) ALWAYS_INLINE_LAMBDA -> Result {
auto QueryMappingFromPageTable = [&](uint64_t phys_addr, size_t size) ALWAYS_INLINE_LAMBDA -> Result {
/* The size must be non-zero. */
R_UNLESS(size > 0, svc::ResultInvalidSize());
@ -56,7 +56,12 @@ namespace ams::kern::svc {
R_UNLESS((phys_addr < phys_addr + size), svc::ResultNotFound());
/* Query the mapping. */
R_TRY(pt.QueryIoMapping(std::addressof(found_address), phys_addr, size));
R_TRY_CATCH(pt.QueryIoMapping(std::addressof(found_address), phys_addr, size)) {
R_CATCH(svc::ResultNotFound) {
/* If we failed to find an io mapping, check if the address is a static mapping. */
R_TRY(pt.QueryStaticMapping(std::addressof(found_address), phys_addr, size));
}
} R_END_TRY_CATCH;
/* Use the size as the found size. */
found_size = size;
@ -66,12 +71,12 @@ namespace ams::kern::svc {
if (aligned) {
/* Query the input. */
R_TRY(QueryIoMappingFromPageTable(phys_addr, size));
R_TRY(QueryMappingFromPageTable(phys_addr, size));
} else {
if (kern::GetTargetFirmware() < TargetFirmware_8_0_0 && phys_addr >= PageSize) {
/* Query the aligned-down page. */
const size_t offset = phys_addr & (PageSize - 1);
R_TRY(QueryIoMappingFromPageTable(phys_addr - offset, size + offset));
R_TRY(QueryMappingFromPageTable(phys_addr - offset, size + offset));
/* Adjust the output address. */
found_address += offset;