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Update linux.Map_Flags_Bits

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Fixes #5151

- Removes `SHARED_VALIDATE` from the enum and turns it into `Map_Shared_Validate :: Map_Flags{.SHARED, .PRIVATE}` so it has the proper value of 0x03.
- Adds `DROPPABLE`.
- Adds constants `MAP_HUGE_SHIFT` and `MAP_HUGE_MASK`.
- Adds the huge page precomputed constants from `mman.h`, defined as the log2 of the size shifted left by `MAP_HUGE_SHIFT`:
	Map_Huge_16KB
	Map_Huge_64KB
	Map_Huge_512KB
	Map_Huge_1MB
	Map_Huge_2MB
	Map_Huge_8MB
	Map_Huge_16MB
	Map_Huge_32MB
	Map_Huge_256MB
	Map_Huge_512MB
	Map_Huge_1GB
	Map_Huge_2GB
	Map_Huge_16GB
This commit is contained in:
Jeroen van Rijn
2025-05-12 16:45:51 +02:00
parent d2d4ac8120
commit dec3d6959d
2 changed files with 21 additions and 2 deletions
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8
core/sys/linux/bits.odin
View File

@@ -579,7 +579,7 @@ Inotify_Event_Bits :: enum u32 {
/*
Bits for Mem_Protection bitfield
*/
Mem_Protection_Bits :: enum{
Mem_Protection_Bits :: enum {
READ = 0,
WRITE = 1,
EXEC = 2,
@@ -598,7 +598,7 @@ Mem_Protection_Bits :: enum{
Map_Flags_Bits :: enum {
SHARED = 0,
PRIVATE = 1,
SHARED_VALIDATE = 2,
DROPPABLE = 3,
FIXED = 4,
ANONYMOUS = 5,
// platform-dependent section start
@@ -619,6 +619,10 @@ Map_Flags_Bits :: enum {
UNINITIALIZED = 26,
}
// Not actually flags, but a shift and mask for when HUGETLB is defined
MAP_HUGE_SHIFT :: 26
MAP_HUGE_MASK :: 63
/*
Bits for MLock_Flags
*/

15
core/sys/linux/types.odin
View File

@@ -371,6 +371,21 @@ Mem_Protection :: bit_set[Mem_Protection_Bits; i32]
*/
Map_Flags :: bit_set[Map_Flags_Bits; i32]
Map_Shared_Validate :: Map_Flags{.SHARED, .PRIVATE}
Map_Huge_16KB :: transmute(Map_Flags)(u32(14) << MAP_HUGE_SHIFT)
Map_Huge_64KB :: transmute(Map_Flags)(u32(16) << MAP_HUGE_SHIFT)
Map_Huge_512KB :: transmute(Map_Flags)(u32(19) << MAP_HUGE_SHIFT)
Map_Huge_1MB :: transmute(Map_Flags)(u32(20) << MAP_HUGE_SHIFT)
Map_Huge_2MB :: transmute(Map_Flags)(u32(21) << MAP_HUGE_SHIFT)
Map_Huge_8MB :: transmute(Map_Flags)(u32(23) << MAP_HUGE_SHIFT)
Map_Huge_16MB :: transmute(Map_Flags)(u32(24) << MAP_HUGE_SHIFT)
Map_Huge_32MB :: transmute(Map_Flags)(u32(25) << MAP_HUGE_SHIFT)
Map_Huge_256MB :: transmute(Map_Flags)(u32(28) << MAP_HUGE_SHIFT)
Map_Huge_512MB :: transmute(Map_Flags)(u32(29) << MAP_HUGE_SHIFT)
Map_Huge_1GB :: transmute(Map_Flags)(u32(30) << MAP_HUGE_SHIFT)
Map_Huge_2GB :: transmute(Map_Flags)(u32(31) << MAP_HUGE_SHIFT)
Map_Huge_16GB :: transmute(Map_Flags)(u32(34) << MAP_HUGE_SHIFT)
/*
Flags for mlock(2).
*/