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flanterm PAGE FAULT, tries to access NULL or NULL+small offset

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xamidev
2026-03-02 11:32:24 +01:00
parent 1f055ab31c
commit 9df33b49d8
3 changed files with 22 additions and 11 deletions
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6
src/kernel.h
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@@ -20,13 +20,13 @@ enum ErrorCodes
#include "io/term/printf.h"
#include "idt/idt.h"
//#define DEBUG(log, ...) fctprintf((void*)&skputc, 0, "debug: [%s]: " log "\r\n", __FILE__, ##__VA_ARGS__)
#define DEBUG(log, ...) fctprintf((void*)&skputc, 0, "debug: [%s]: " log "\r\n", __FILE__, ##__VA_ARGS__)
#define DEBUG(log, ...) \
/* #define DEBUG(log, ...) \
printf("debug: [%s]: " log "\r\n", __FILE__, ##__VA_ARGS__); \
fctprintf((void*)&skputc, 0, "debug: [%s]: " log "\r\n", __FILE__, ##__VA_ARGS__)
*/
#define DIE_DEBUG(str) fctprintf((void*)&skputc, 0, str)

19
src/kmain.c
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@@ -79,6 +79,12 @@ void kmain()
boot_ctx.hhdm = hhdm_request.response ? hhdm_request.response : NULL;
boot_ctx.kaddr = kerneladdr_request.response ? kerneladdr_request.response : NULL;
pmm_init(boot_ctx.mmap, boot_ctx.hhdm);
// Remap kernel , HHDM and framebuffer
paging_init(boot_ctx.kaddr, boot_ctx.fb);
uint32_t bgColor = 0x252525;
ft_ctx = flanterm_fb_init(
NULL,
NULL,
@@ -88,7 +94,7 @@ void kmain()
boot_ctx.fb->blue_mask_size, boot_ctx.fb->blue_mask_shift,
NULL,
NULL, NULL,
NULL, NULL,
&bgColor, NULL, // &bgColor
NULL, NULL,
NULL, 0, 0, 1,
0, 0,
@@ -106,11 +112,6 @@ void kmain()
gdt_init();
idt_init();
timer_init();
pmm_init(boot_ctx.mmap, boot_ctx.hhdm);
// Remap kernel , HHDM and framebuffer
paging_init(boot_ctx.kaddr, boot_ctx.fb);
kheap_init();
@@ -132,9 +133,11 @@ void kmain()
keyboard_init(FR);
//term_init();
printf(PEPPEROS_SPLASH);
//printf(PEPPEROS_SPLASH);
printf("Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur eu diam id sem tincidunt vestibulum. Etiam sed congue nisl, vitae aliquet orci. Donec magna turpis, semper sed ipsum eget, semper blandit dolor. Morbi faucibus posuere sapien. Vestibulum aliquet mi vel orci finibus, vestibulum rhoncus tellus sagittis. Vivamus a arcu suscipit sem iaculis volutpat vel nec est. Nulla malesuada, urna vel pretium pretium, enim tortor pulvinar velit, porttitor dictum lectus turpis id tortor. Quisque egestas ultricies lorem, egestas ultrices tellus elementum porta. Fusce consequat nisi in diam placerat fermentum. Suspendisse tempus turpis nec turpis condimentum fringilla. Maecenas nec orci pharetra, feugiat enim vel, viverra neque. Vivamus placerat purus in tincidunt ultricies. Pellentesque vel mi molestie, congue nibh nec, cursus nisl. Cras dapibus lectus mauris, sed interdum risus tristique non. ");
//printf("Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur eu diam id sem tincidunt vestibulum. Etiam sed congue nisl, vitae aliquet orci. Donec magna turpis, semper sed ipsum eget, semper blandit dolor. Morbi faucibus posuere sapien. Vestibulum aliquet mi vel orci finibus, vestibulum rhoncus tellus sagittis. Vivamus a arcu suscipit sem iaculis volutpat vel nec est. Nulla malesuada, urna vel pretium pretium, enim tortor pulvinar velit, porttitor dictum lectus turpis id tortor. Quisque egestas ultricies lorem, egestas ultrices tellus elementum porta. Fusce consequat nisi in diam placerat fermentum. Suspendisse tempus turpis nec turpis condimentum fringilla. Maecenas nec orci pharetra, feugiat enim vel, viverra neque. Vivamus placerat purus in tincidunt ultricies. Pellentesque vel mi molestie, congue nibh nec, cursus nisl. Cras dapibus lectus mauris, sed interdum risus tristique non. ");
flanterm_write(ft_ctx, "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur eu diam id sem tincidunt vestibulum. Etiam sed congue nisl, vitae aliquet orci. Donec magna turpis, semper sed ipsum eget, semper blandit dolor. Morbi faucibus posuere sapien. Vestibulum aliquet mi vel orci finibus, vestibulum rhoncus tellus sagittis. Vivamus a arcu suscipit sem iaculis volutpat vel nec est. Nulla malesuada, urna vel pretium pretium, enim tortor pulvinar velit, porttitor dictum lectus turpis id tortor. Quisque egestas ultricies lorem, egestas ultrices tellus elementum porta. Fusce consequat nisi in diam placerat fermentum. Suspendisse tempus turpis nec turpis condimentum fringilla. Maecenas nec orci pharetra, feugiat enim vel, viverra neque. Vivamus placerat purus in tincidunt ultricies. Pellentesque vel mi molestie, congue nibh nec, cursus nisl. Cras dapibus lectus mauris, sed interdum risus tristique non.", sizeof("Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur eu diam id sem tincidunt vestibulum. Etiam sed congue nisl, vitae aliquet orci. Donec magna turpis, semper sed ipsum eget, semper blandit dolor. Morbi faucibus posuere sapien. Vestibulum aliquet mi vel orci finibus, vestibulum rhoncus tellus sagittis. Vivamus a arcu suscipit sem iaculis volutpat vel nec est. Nulla malesuada, urna vel pretium pretium, enim tortor pulvinar velit, porttitor dictum lectus turpis id tortor. Quisque egestas ultricies lorem, egestas ultrices tellus elementum porta. Fusce consequat nisi in diam placerat fermentum. Suspendisse tempus turpis nec turpis condimentum fringilla. Maecenas nec orci pharetra, feugiat enim vel, viverra neque. Vivamus placerat purus in tincidunt ultricies. Pellentesque vel mi molestie, congue nibh nec, cursus nisl. Cras dapibus lectus mauris, sed interdum risus tristique non. "));
idle();
}

8
src/mem/paging/paging.c
View File

@@ -187,6 +187,14 @@ void paging_init()
}
DEBUG("Mapped %u pages for framebuffer", page_count);
// test for flanterm
// When 10 pages are mapped, SOMETIMES (1 out of 50 times) it prints everything without problem!
// Other times it prints garbage (almost full cursors) and/or panics.
/* for (uint64_t i=0; i<10; i++)
{
paging_map_page(kernel_pml4, 0, kernel_phys_base+KERNEL_SIZE+i*PAGE_SIZE, PTE_WRITABLE);
} */
// Finally, we load the physical address of our PML4 (root table) into cr3
load_cr3(VIRT_TO_PHYS(kernel_pml4));
DEBUG("cr3 loaded, we're still alive");