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Working on page protection

This commit is contained in:
Adrien Bourmault 2019-12-21 13:55:02 +01:00
parent 7b35afb291
commit ca2c676df9
3 changed files with 34 additions and 6 deletions
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7
build/kernel.ld
View File

@ -38,13 +38,16 @@ SECTIONS {
.text ALIGN (0x1000) : .text ALIGN (0x1000) :
{ {
_text = .;
*(.text) *(.text)
_text_end = .;
} }
.data ALIGN (0x1000) : .data ALIGN (0x1000) :
{ {
_data = .; _data = .;
*(.data) *(.data)
_data_end = .;
} }
.eh_frame ALIGN (0x1000) : .eh_frame ALIGN (0x1000) :
@ -55,7 +58,9 @@ SECTIONS {
.rodata ALIGN (0x1000) : .rodata ALIGN (0x1000) :
{ {
_rodata = .;
*(.rodata) *(.rodata)
_rodata_end = .;
} }
.bss ALIGN (0x1000) : .bss ALIGN (0x1000) :
@ -70,5 +75,3 @@ SECTIONS {
kernelEnd = .; kernelEnd = .;
} }

8
kaleid/kernel/io/spkr.c
View File

@ -100,10 +100,10 @@ void IoDoStarWars(void)
//bprintf(BStdOut, "\n"); //bprintf(BStdOut, "\n");
for (uint i = 0; i < sizeof(score)/sizeof(struct Note); i++) { for (uint i = 0; i < 41; i++) {
IoDoTone(score[i].tone, score[i].time); //IoDoTone(score[i].tone, score[i].time);
//bprintf(BStdOut, "%d ", i); bprintf(BStdOut, "%d ", score[i].time);
//BStdOut->flusher(BStdOut); BStdOut->flusher(BStdOut);
} }
IoQuietSpeaker(); IoQuietSpeaker();

25
kaleid/kernel/mm/paging.c
View File

@ -33,6 +33,13 @@ volatile pde_t MmPD[512 * RAM_MAX] __attribute__((__aligned__(KPAGESIZE)));;
volatile pte_t MmPT[512 * NB_4K] __attribute__((__aligned__(KPAGESIZE)));; volatile pte_t MmPT[512 * NB_4K] __attribute__((__aligned__(KPAGESIZE)));;
extern ulong _text;
extern ulong _text_end;
extern ulong _rodata;
extern ulong _rodata_end;
extern ulong _data;
extern ulong _data_end;
ulong MmStackGuards[2] = { 0 }; ulong MmStackGuards[2] = { 0 };
// //
@ -68,6 +75,24 @@ void MmInitPaging(void)
continue; continue;
} }
// TEXT
if ((ulong)(i*KPAGESIZE) >= (ulong)_text && (ulong)(i*KPAGESIZE) <= (ulong)_text_end) {
MmPT[i] = ((ulong)(i*KPAGESIZE));
continue;
}
// RODATA
if ((ulong)(i*KPAGESIZE) >= (ulong)_rodata && (ulong)(i*KPAGESIZE) <= (ulong)_rodata_end) {
MmPT[i] = ((ulong)(i*KPAGESIZE)) | MF_PRESENT;
continue;
}
// DATA
if ((ulong)(i*KPAGESIZE) >= (ulong)_data && (ulong)(i*KPAGESIZE) <= (ulong)_data_end) {
MmPT[i] = ((ulong)(i*KPAGESIZE)) | MF_PRESENT;
continue;
}
MmPT[i] = ((ulong)(i*KPAGESIZE)) | MF_PRESENT | MF_READWRITE; MmPT[i] = ((ulong)(i*KPAGESIZE)) | MF_PRESENT | MF_READWRITE;
} }