kolibrios-fun/contrib/sdk/sources/newlib/libc/crt/start.S
Sergey Semyonov (Serge) e6fe081453 newlib-2.4.0
git-svn-id: svn://kolibrios.org@6536 a494cfbc-eb01-0410-851d-a64ba20cac60
2016-09-27 20:37:49 +00:00

47 lines
1.2 KiB
ArmAsm

.section .init
.global __crt_start
#tls:0 pid process id
#tls:4 tid reserved for thread slot
#tls:8 thread's stack low limit
#tls:12 thread's stack high limit
#tls:16 reseved for libc
.align 4
__crt_start:
movl $68, %eax
movl $12, %ebx
lea __size_of_stack_reserve__, %ecx
addl $4095, %ecx #load stack size
andl $-4096, %ecx #align to page granularity
int $0x40 #and allocate
testl %eax, %eax
jz 1f
addl %eax, %ecx
movl %eax, %fs:8
movl %ecx, %fs:12 #save stack base - low limit
#save stack top - high limit
movl %ecx, %esp #reload stack
subl $1024, %esp
movl $9, %eax
movl %esp, %ebx
movl $-1, %ecx
int $0x40
movl 30(%ebx), %eax
movl %eax, %fs:0 #save pid
addl $1024, %esp
jmp ___libc_init
1:
int3 #trap to debugger
.ascii "No enough memory for stack allocation"