diff options
| author | NIIBE Yutaka <gniibe@fsij.org> | 2013-05-29 15:10:38 +0900 |
|---|---|---|
| committer | NIIBE Yutaka <gniibe@fsij.org> | 2013-05-29 15:10:38 +0900 |
| commit | 23d3155f955344252295f99a8cce9ceb19acf6cf (patch) | |
| tree | 71304b7b986557763816af20941688852bbb927d /entry.c | |
| parent | 48ccb4458d9c0f9accc1529fa94d089559aeca59 (diff) | |
entry.c fix, etc.
Diffstat (limited to 'entry.c')
| -rw-r--r-- | entry.c | 23 |
1 files changed, 18 insertions, 5 deletions
@@ -264,14 +264,27 @@ static __attribute__ ((naked,section(".text.startup.0"))) void entry (void) { asm volatile ("bl clock_init\n\t" - /* Clear BSS. Assume its size is > 0. */ + /* Clear BSS section. */ "mov r0, #0\n\t" "ldr r1, =_bss_start\n\t" "ldr r2, =_bss_end\n" "0:\n\t" + "cmp r1, r2\n\t" + "beq 1f\n\t" "str r0, [r1], #4\n\t" - "cmp r2, r1\n\t" - "bhi 0b\n\t" + "b 0b\n" + "1:\n\t" + /* Copy data section. */ + "ldr r1, =_data\n\t" + "ldr r2, =_edata\n\t" + "ldr r3, =_textdata\n" + "2:\n\t" + "cmp r1, r2\n\t" + "beq 3f\n\t" + "ldr r0, [r3], #4\n\t" + "str r0, [r1], #4\n\t" + "b 2b\n" + "3:\n\t" /* Switch to PSP. */ "ldr r0, =__process0_stack_end__\n\t" "sub r0, #56\n\t" @@ -289,8 +302,8 @@ void entry (void) /* Call main. */ "mov r1, r0\n\t" "bl main\n" - "1:\n\t" - "b 1b" + "4:\n\t" + "b 4b" : /* no output */ : /* no input */ : "memory"); } |