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web: better browser memory patching strategy

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This commit is contained in:
hexkyz
2026-10-15 20:25:15 +01:00
parent 2fec688983
commit 0165f5dcc1
2 changed files with 23 additions and 26 deletions
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5
libraries/libmesosphere/source/board/nintendo/nx/kern_k_system_control.cpp
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@@ -358,9 +358,10 @@ namespace ams::kern::board::nintendo::nx {
/* NOTE: On 20.0.0+ (and even more-so 21.0.0+) the browser requires much more memory in the applet pool in order to function. */
/* Thus, we have to reduce our extra system memory size by 26 MB to compensate. */
/* NOTE: On 23.0.0+ we are patching memory allocation for each browser applet since there are only 3 of them now. */
/* Given that the root "Reserved" region is 0x43E000 bytes and the "ReservedTbd" subregion is 0x540000 bytes, we can safely reclaim 9MB.*/
/* Reclaiming unused memory and lying to the browser about memory limits allows us to go back to 40 MB of extra system memory. */
/* TODO: Deduplicate post 23.0.0 and pre 20.0.0. For now, this structure helps with readability and is still subject to change. */
if (kern::GetTargetFirmware() >= ams::TargetFirmware_23_0_0) {
constexpr size_t ExtraSystemMemoryForAtmosphere_23_0_0 = 16_MB;
constexpr size_t ExtraSystemMemoryForAtmosphere_23_0_0 = 40_MB;
return base_pool_size - ExtraSystemMemoryForAtmosphere_23_0_0 - KTraceBufferSize;
} else if (kern::GetTargetFirmware() >= ams::TargetFirmware_21_0_0) {
constexpr size_t ExtraSystemMemoryForAtmosphere_21_0_0 = 7_MB;

44
stratosphere/loader/source/ldr_embedded_web_patches.inc
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@@ -15,41 +15,37 @@
*/
/* Breakdown of each patch in order: */
/* #1 - Patch the 0xDEEF000 size check branch to NOP. */
/* #1 - Set TotalAvailableMemorySize to 1GB. */
/* #2 - Change the root heap "Reserved" region allocation size from 0x43E000 to 0. */
/* #3 - Change the root heap "Scene" size from 0x4580000 to 0x4040000. */
/* #4 - Change the scene heap "ReservedTbd" region allocation size from 0x540000 to 0. */
/* #5 - Patch the linking of "ReservedTbd" to the parent heap with a NOP. */
/* #6 - Patch the initial memory block allocation size from 0xB400000 to 0xAC00000. */
/* #7 - Patch the initial memory block initialization size from 0xB400000 to 0xAC00000. */
/* #3 - Patch the initial memory block allocation size from 0xB400000 to 0xB000000. */
/* #4 - Patch the initial memory block heap size from 0xB400000 to 0xB000000. */
/* #5 - Patch the browser engine memory capacity from 0xAA00000 to 0x9000000. */
/* #6 - Patch the browser engine memory allocation size from 0xAA00000 to 0x9000000. */
constexpr inline const EmbeddedPatchEntry SystemWebMemoryPatches_23_0_0[] = {
{ 0x861DD4, "\x1F\x20\x03\xD5", 4 },
{ 0x6113A8, "\x09\x00\xA8\xD2", 4 },
{ 0x861E80, "\x02\x00\x80\x52", 4 },
{ 0x861E6C, "\x82\x80\xA0\x52", 4 },
{ 0x8C1718, "\x02\x00\x80\x52", 4 },
{ 0x8C172C, "\x1F\x20\x03\xD5", 4 },
{ 0x861D44, "\x01\x58\xA1\x52", 4 },
{ 0x861D5C, "\x03\x58\xA1\x52", 4 },
{ 0x861D44, "\x01\x60\xA1\x52", 4 },
{ 0x861D5C, "\x03\x60\xA1\x52", 4 },
{ 0x8623D0, "\x01\x20\xA1\x52", 4 },
{ 0x862498, "\x01\x20\xA1\x52", 4 },
};
constexpr inline const EmbeddedPatchEntry OpenWebMemoryPatches_23_0_0[] = {
{ 0x828DBC, "\x1F\x20\x03\xD5", 4 },
{ 0x611428, "\x09\x00\xA8\xD2", 4 },
{ 0x828E68, "\x02\x00\x80\x52", 4 },
{ 0x828E54, "\x82\x80\xA0\x52", 4 },
{ 0x74C564, "\x02\x00\x80\x52", 4 },
{ 0x74C578, "\x1F\x20\x03\xD5", 4 },
{ 0x828D2C, "\x01\x58\xA1\x52", 4 },
{ 0x828D44, "\x03\x58\xA1\x52", 4 },
{ 0x828D2C, "\x01\x60\xA1\x52", 4 },
{ 0x828D44, "\x03\x60\xA1\x52", 4 },
{ 0x8293B8, "\x01\x20\xA1\x52", 4 },
{ 0x829480, "\x01\x20\xA1\x52", 4 },
};
constexpr inline const EmbeddedPatchEntry OfflineWebMemoryPatches_23_0_0[] = {
{ 0x130698, "\x1F\x20\x03\xD5", 4 },
{ 0x6DE0DC, "\x09\x00\xA8\xD2", 4 },
{ 0x130744, "\x02\x00\x80\x52", 4 },
{ 0x130730, "\x82\x80\xA0\x52", 4 },
{ 0x4D728, "\x02\x00\x80\x52", 4 },
{ 0x4D738, "\x1F\x20\x03\xD5", 4 },
{ 0x130614, "\x01\x58\xA1\x52", 4 },
{ 0x130624, "\x02\x58\xA1\x52", 4 },
{ 0x130614, "\x01\x60\xA1\x52", 4 },
{ 0x130624, "\x02\x60\xA1\x52", 4 },
{ 0x130C30, "\x01\x20\xA1\x52", 4 },
{ 0x130CD0, "\x01\x20\xA1\x52", 4 },
};
constexpr inline const EmbeddedPatch WebMemoryPatches[] = {