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lib: c: implement runtime initialisation

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max 🍓
2026-03-22 19:11:43 +00:00
parent 7b89a038a2
commit c1e10e8b70
4 changed files with 34 additions and 10 deletions
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2
lib/libc/CMakeLists.txt
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@@ -26,7 +26,7 @@ bsp_add_library(
NAME libc NAME libc
LIB_DIR /usr/lib) LIB_DIR /usr/lib)
target_link_libraries(libc PRIVATE libmango libxpc-static interface::fs) target_link_libraries(libc PRIVATE libmango librosetta libxpc-static interface::fs)
target_compile_definitions(libc PRIVATE ENABLE_GLOBAL_HEAP=1) target_compile_definitions(libc PRIVATE ENABLE_GLOBAL_HEAP=1)
add_subdirectory(pthread) add_subdirectory(pthread)

8
lib/libc/core/CMakeLists.txt
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@@ -8,13 +8,17 @@ foreach (dir ${source_dirs})
set(headers ${headers} ${dir_headers}) set(headers ${headers} ${dir_headers})
endforeach (dir) endforeach (dir)
set(component_sources ${sources} PARENT_SCOPE) file(GLOB sys_sources
${CMAKE_CURRENT_SOURCE_DIR}/sys/${CMAKE_SYSTEM_PROCESSOR}/*.c
${CMAKE_CURRENT_SOURCE_DIR}/sys/${CMAKE_SYSTEM_PROCESSOR}/*.S)
set(component_sources ${sources} ${sys_sources} PARENT_SCOPE)
set(component_headers ${headers} PARENT_SCOPE) set(component_headers ${headers} PARENT_SCOPE)
rosetta_add_library(STATIC rosetta_add_library(STATIC
NAME libc-core NAME libc-core
PUBLIC_INCLUDE_DIRS ${public_include_dirs} PUBLIC_INCLUDE_DIRS ${public_include_dirs}
SOURCES ${sources} SOURCES ${sources} ${sys_sources}
HEADERS ${headers}) HEADERS ${headers})
sysroot_add_library( sysroot_add_library(

18
lib/libc/core/sys/x86_64/init.c Normal file
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@@ -0,0 +1,18 @@
#include <mango/log.h>
#include <rosetta/bootstrap.h>
#include <stdio.h>
extern int main(int, const char **, const char **);
void *__attribute__((weak)) pthread_self(void)
{
/* Nothing */
return NULL;
}
int __libc_init(const struct rosetta_bootstrap *bsinfo)
{
(volatile void)pthread_self();
kern_logf("bsinfo = %p", bsinfo);
return 0;
}

16
lib/libc/runtime/x86_64/crt0.s
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@@ -3,18 +3,20 @@
.global _start .global _start
.type _start, @function .type _start, @function
.extern main .extern __libc_init
.type main, @function .type __libc_init, @function
.extern task_exit .extern task_exit
.type task_exit, @function .type task_exit, @function
_start: _start:
# Args (as provided by the ABI) # %rdi: (struct rosetta_bootstrap *)bs_info
# %rdi: int argc mov %rdi, %rbx
# %rsi: const char **argv call __libc_init
# %rdx: kern_handle_t task
# %rcx: kern_handle_t address_space mov 0(%rbx), %rdi # argc
mov 8(%rbx), %rsi # argv
mov 24(%rbx), %rdx # envp
call main call main
mov %rax, %rdi mov %rax, %rdi