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Barebones rust example working in user space.

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Requires manually copying the executable over to the image.
This commit is contained in:
Drew Galbraith 2024-06-08 15:47:58 -07:00
parent 844f55c7d0
commit b0048b0a4f
13 changed files with 707 additions and 1 deletions
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14
lib/mammoth/proc/process.cpp
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@ -69,7 +69,14 @@ uint64_t LoadElfProgram(uint64_t base, uint64_t as_cap) {
reinterpret_cast<Elf64ProgramHeader*>(base + header->phoff);
for (uint64_t i = 0; i < header->phnum; i++) {
Elf64ProgramHeader& program = programs[i];
if (program.type != 1) {
// Only load loadable types.
// TODO: This may break if the stack is far away?
continue;
}
#if MAM_PROC_DEBUG
dbgln(glcr::StrFormat("Program:\n\tType: {}\n\tFlags: {}\n\t", program.type,
program.flags));
dbgln("Create mem object");
#endif
uint64_t page_offset = program.vaddr & 0xFFF;
@ -93,7 +100,8 @@ uint64_t LoadElfProgram(uint64_t base, uint64_t as_cap) {
memcpy(base + program.offset, program.filesz, vaddr + page_offset);
#if MAM_PROC_DEBUG
dbgln("Map Foreign");
dbgln(glcr::StrFormat("Map Foreign: {x} {x} {x}",
program.vaddr - page_offset, size, vaddr));
#endif
check(ZAddressSpaceMap(as_cap, program.vaddr - page_offset, mem_cap, 0,
&vaddr));
@ -124,6 +132,10 @@ glcr::ErrorOr<z_cap_t> SpawnProcessFromElfRegion(uint64_t program,
uint64_t entry_point = LoadElfProgram(program, as_cap);
if (entry_point == 0) {
crash("Entry Point == 0", glcr::INTERNAL);
}
#if MAM_PROC_DEBUG
dbgln("Thread Create");
#endif