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| author | Paul Brook <paul@codesourcery.com> | 2006-08-30 22:24:19 +0000 |
|---|---|---|
| committer | Paul Brook <paul@codesourcery.com> | 2006-08-30 22:24:19 +0000 |
| commit | 61cf16961909644dcd2874feab226ba3f74f6db8 (patch) | |
| tree | 9e8d7fb1ba5f168652a531e930b08308c44dca57 /newlib | |
| parent | 83cc5b75d985be0f77fafa46a13a74db6b453a12 (diff) | |
| download | cygnal-61cf16961909644dcd2874feab226ba3f74f6db8.tar.gz cygnal-61cf16961909644dcd2874feab226ba3f74f6db8.tar.bz2 cygnal-61cf16961909644dcd2874feab226ba3f74f6db8.zip | |
2006-08-30 Paul Brook <paul@codesourcery.com>
libgloss/
* arm/Makefile.in: Change armv7m linker script generation. Add
armv7m.spec. Build armv7m-crt0.o.
* arm/arm.sc: New file.
* arm/armv7m.specs: New file.
* arm/crt0.S: Add armv7m code.
* arm/elf-lm3s10x.ld: Remove.
* arm/elf-lm3s301.ld: Remove.
* arm/elf-lm3s31x.ld: Remove.
* arm/swi.h (do_AngelSWI): Add definition.
* arm/syscalls.c: Merge lazy semihosting initialization from newlib.
newlib/
* libc/sys/arm/crt0.S: Add armv7m rom startup code.
Diffstat (limited to 'newlib')
| -rw-r--r-- | newlib/libc/sys/arm/crt0.S | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/newlib/libc/sys/arm/crt0.S b/newlib/libc/sys/arm/crt0.S index d84983ec8..9d4f15872 100644 --- a/newlib/libc/sys/arm/crt0.S +++ b/newlib/libc/sys/arm/crt0.S @@ -45,7 +45,27 @@ /* Start by setting up a stack */ #ifdef _ARM_V7M - /* On ARM V7M, the stack pointer is set up at CPU reset. */ + /* Copy .data into ram. */ + ldr r0, =__data_load + ldr r1, =__data_start + cmp r0, r1 /* If LMA == VMA we are running from ram. */ + beq 2f + ldr r2, =_edata + /* When running from ROM the stack pointer is set up at CPU reset. */ + /* Copy .data into RAM. */ +1: + ldr r3, [r0], #4 + str r3, [r1], #4 + cmp r1, r2 + blt 1b + b 3f +2: + /* Set the stack pointer when running from RAM. */ + ldr r0, .Lstack + cmp r0, #0 + beq 3f + mov sp, r0 +3: #else # ifdef ARM_RDP_MONITOR /* Issue Demon SWI to read stack info */ @@ -278,6 +298,10 @@ change_back: # endif # endif #endif +#ifdef _ARM_V7M +.Lstack: + .word __stack +#endif #if defined(__ELF__) && !defined(__USING_SJLJ_EXCEPTIONS__) /* Protect against unhandled exceptions. */ .cantunwind @@ -317,12 +341,12 @@ CommandLine: .space 256,0 /* Maximum length of 255 chars handled. */ exceptions. */ .section .isr_vector, "a" /* The value for the stack pointer at reset. */ - .word _stack + .word __stack /* The value for the PC at reset. */ .word _start /* The value for the PC if an NMI occurs. */ .word _nmi_isr /* The value for the PC if a fault occurs. */ .word _fault_isr -#endif _ARM_V7M +#endif /* _ARM_V7M */ |