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| author | Freya Murphy <freya@freyacat.org> | 2025-04-25 18:43:16 -0400 |
|---|---|---|
| committer | Freya Murphy <freya@freyacat.org> | 2025-04-25 18:43:16 -0400 |
| commit | f857cfe3d4d3ab6b1eed603f5b948051853b5f63 (patch) | |
| tree | 4221fa2796643acb4a346ae7f306b30efbd77d2e /kernel/user.c | |
| parent | mem_get_phys fn (diff) | |
| download | comus-f857cfe3d4d3ab6b1eed603f5b948051853b5f63.tar.gz comus-f857cfe3d4d3ab6b1eed603f5b948051853b5f63.tar.bz2 comus-f857cfe3d4d3ab6b1eed603f5b948051853b5f63.zip | |
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Diffstat (limited to '')
| -rw-r--r-- | kernel/user.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/kernel/user.c b/kernel/user.c index 543c033..b4f10d5 100644 --- a/kernel/user.c +++ b/kernel/user.c @@ -17,11 +17,12 @@ static int user_load_segment(struct pcb *pcb, struct disk *disk, int idx) { uint8_t buf[PAGE_SIZE]; Elf64_Phdr hdr; - size_t npages, nbytes; + size_t npages, nvpages, nbytes; hdr = pcb->elf_segments[idx]; nbytes = hdr.p_filesz; npages = (nbytes + PAGE_SIZE - 1) / PAGE_SIZE; + nvpages = (hdr.p_memsz + PAGE_SIZE - 1) / PAGE_SIZE; if (npages < 1) return 0; @@ -30,7 +31,7 @@ static int user_load_segment(struct pcb *pcb, struct disk *disk, int idx) return 0; // allocate memory in user process - if (mem_alloc_pages_at(pcb->memctx, npages, (void *)hdr.p_vaddr, + if (mem_alloc_pages_at(pcb->memctx, nvpages, (void *)hdr.p_vaddr, F_WRITEABLE | F_UNPRIVILEGED) == NULL) return 1; @@ -76,7 +77,7 @@ static int validate_elf_hdr(struct pcb *pcb) return 1; } - if(ehdr->e_ident[EI_DATA] != ELFDATA2LSB) { + if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB) { ERROR("Unsupported ELF File byte order.\n"); return 1; } @@ -96,7 +97,7 @@ static int validate_elf_hdr(struct pcb *pcb) return 1; } - if(ehdr->e_type != ET_EXEC) { + if (ehdr->e_type != ET_EXEC) { ERROR("Unsupported ELF File type.\n"); return 1; } |