URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-old/] [newlib-1.17.0/] [libgloss/] [mcore/] [crt0.S] - Diff between revs 158 and 816

Rev 158	Rev 816
`// MCore StartUp Code.`	`// MCore StartUp Code.`

`.import main`	`.import main`
`.import exit`	`.import exit`

`.text`	`.text`
`.export _start`	`.export _start`
`_start:`	`_start:`
`.export _mainCRTStartup`	`.export _mainCRTStartup`
`_mainCRTStartup:`	`_mainCRTStartup:`
`// Initialise the stack pointer`	`// Initialise the stack pointer`
`lrw r1, _stack`	`lrw r1, _stack`
`mov r0, r1`	`mov r0, r1`

`// Zero the .bss data space`	`// Zero the .bss data space`
`lrw r1, __bss_start__`	`lrw r1, __bss_start__`
`lrw r2, __bss_end__`	`lrw r2, __bss_end__`
`movi r3, 0`	`movi r3, 0`
`.L0:`	`.L0:`
`st r3, (r1, 0)`	`st r3, (r1, 0)`
`addi r1, 4`	`addi r1, 4`
`cmphs r1, r2`	`cmphs r1, r2`
`bf .L0`	`bf .L0`
`#ifdef __ELF__`	`#ifdef __ELF__`
`// Call the global/static constructors`	`// Call the global/static constructors`
`jbsr _init`	`jbsr _init`

`// Setup destructors to be called from exit,`	`// Setup destructors to be called from exit,`
`// just in case main never returns...`	`// just in case main never returns...`
`lrw r2, _fini`	`lrw r2, _fini`
`jbsr atexit`	`jbsr atexit`
`#endif`	`#endif`

`// Initialise the parameters to main()`	`// Initialise the parameters to main()`
`movi r2, 0 // argc`	`movi r2, 0 // argc`
`movi r3, 0 // argv`	`movi r3, 0 // argv`
`movi r4, 0 // envp`	`movi r4, 0 // envp`

`// Call main`	`// Call main`
`jbsr main`	`jbsr main`

`// Call exit`	`// Call exit`
`movi r2, 0`	`movi r2, 0`
`jbsr exit`	`jbsr exit`

`// We should never reach here.`	`// We should never reach here.`
`bkpt`	`bkpt`