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authorDavid McCullough <davidm@snapgear.com>2001-12-19 03:43:54 +0000
committerDavid McCullough <davidm@snapgear.com>2001-12-19 03:43:54 +0000
commitbf126cb24e809f36067ce43f9186cbe53b906cad (patch)
treee9612ead69662cd0cd642829041195b06750b2d3 /libc/sysdeps/linux/arm/crt0pic.S
parent41b035e634135310bca3381877120981d7b248a4 (diff)
merged the two startup files so that uClinux people always get the correct
arg processing whether they are using PIC or not, and vice-versa for the MMU folks.
Diffstat (limited to 'libc/sysdeps/linux/arm/crt0pic.S')
-rw-r--r--libc/sysdeps/linux/arm/crt0pic.S65
1 files changed, 0 insertions, 65 deletions
diff --git a/libc/sysdeps/linux/arm/crt0pic.S b/libc/sysdeps/linux/arm/crt0pic.S
deleted file mode 100644
index 7cb26e80e..000000000
--- a/libc/sysdeps/linux/arm/crt0pic.S
+++ /dev/null
@@ -1,65 +0,0 @@
-/* When we enter this piece of code, the program stack looks like this:
- argc argument counter (integer)
- argv[0] program name (pointer)
- argv[1...N] program args (pointers)
- argv[argc-1] end of args (integer)
- NULL
- env[0...N] environment variables (pointers)
- NULL
-
- When we are done here, we want
- a1=argc
- a2=argv[0]
- a3=argv[argc+1]
-
-ARM register quick reference:
-
- Name Number ARM Procedure Calling Standard Role
-
- a1 r0 argument 1 / integer result / scratch register / argc
- a2 r1 argument 2 / scratch register / argv
- a3 r2 argument 3 / scratch register / envp
- a4 r3 argument 4 / scratch register
- v1 r4 register variable
- v2 r5 register variable
- v3 r6 register variable
- v4 r7 register variable
- v5 r8 register variable
- sb/v6 r9 static base / register variable
- sl/v7 r10 stack limit / stack chunk handle / reg. variable
- fp r11 frame pointer
- ip r12 scratch register / new-sb in inter-link-unit calls
- sp r13 lower end of current stack frame
- lr r14 link address / scratch register
- pc r15 program counter
-*/
-
-.text
- .global _start
- .global __uClibc_main
-
- .type _start,%function
- .type __uClibc_main,%function
-
-
-@ r0 = argc
-@ r1 = argv
-@ r2 = envp
-@ sl = data segment
-#define BASEREG r9
-
-.text
-_start:
- @ adjust the data segment base pointer
- ldr r3,=__data_start
- sub sl,sl,r3
- mov BASEREG,sl
-
- /* pull argc, argv and envp off the stack */
- ldr r0,[sp, #0]
- ldr r1,[sp, #4]
- ldr r2,[sp, #8]
-
- /* Ok, now run uClibc's main() -- shouldn't return */
- bl __uClibc_main
-