From 30d6e8f850d2fe26fffdeef0c38fc627ef8bab9a Mon Sep 17 00:00:00 2001 From: "Anna (navi) Figueiredo Gomes" Date: Wed, 13 Dec 2023 13:24:48 +0100 Subject: initial commit currently with: booted via multiboot 1 protected mode to long mode boostrap code vga used for outputting gdt and idt set up identity paging for the whole memory reported by multiboot pic and ps/2 set up acpi code exists but is broken --- src/mem.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 src/mem.c (limited to 'src/mem.c') diff --git a/src/mem.c b/src/mem.c new file mode 100644 index 0000000..dd302fb --- /dev/null +++ b/src/mem.c @@ -0,0 +1,26 @@ +#include +#include + +void *memcpy(void *restrict dest, const void *restrict src, size_t n) { + for (size_t i = 0; i < n; i++) + ((char *) dest)[i] = ((char *) src)[i]; + return dest; +} + +void *memmove(void *dest, const void *src, size_t n) { + for (size_t i = 0; i < n; i++) + ((char *) dest)[i] = ((char *) src)[i]; + return dest; +} + +void *memset(void *s, int c, size_t n) { + for (size_t i = 0; i < n; i++) + ((char *) s)[i] = c; + return s; +} + +int memcmp(const void *s1, const void *s2, size_t n) { + while (n && *(uint8_t*)s1 == *(uint8_t*)s2) + n--, s1++, s2++; + return n ? *(uint8_t*)s1 - *(uint8_t*)s2 : 0; +} -- cgit v1.2.3