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

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-old/] [newlib-1.17.0/] [libgloss/] [fr30/] [crt0.s] - Diff between revs 158 and 816

Rev 158	Rev 816
`# FR30 startup code`	`# FR30 startup code`

`.section .text`	`.section .text`
`.global _start`	`.global _start`
`_start:`	`_start:`

`;; Initialise the stack pointer`	`;; Initialise the stack pointer`
`ldi:32 __stack, r0`	`ldi:32 __stack, r0`
`mov r0, sp`	`mov r0, sp`
`mov r0, fp`	`mov r0, fp`

`;; Zero the data space`	`;; Zero the data space`
`ldi:32 #_edata, r0`	`ldi:32 #_edata, r0`
`ldi:32 #_end, r1`	`ldi:32 #_end, r1`
`ldi:8 #0, r2`	`ldi:8 #0, r2`
`.L0:`	`.L0:`
`st r2, @r0`	`st r2, @r0`
`add #4, r0`	`add #4, r0`
`cmp r1, r0`	`cmp r1, r0`
`blt .L0`	`blt .L0`

`;; Call global and static constructors`	`;; Call global and static constructors`
`ldi:32 _init, r0`	`ldi:32 _init, r0`
`call @r0`	`call @r0`

`;; Setup destrcutors to be called from exit.`	`;; Setup destrcutors to be called from exit.`
`;; (Just in case main never returns....)`	`;; (Just in case main never returns....)`
`ldi:32 atexit, r0`	`ldi:32 atexit, r0`
`ldi:32 _fini, r4`	`ldi:32 _fini, r4`
`call @r0`	`call @r0`

`;; Initialise argc, argv and envp to empty`	`;; Initialise argc, argv and envp to empty`
`ldi:8 #0, r4`	`ldi:8 #0, r4`
`ldi:8 #0, r5`	`ldi:8 #0, r5`
`ldi:8 #0, r6`	`ldi:8 #0, r6`

`;; Call main`	`;; Call main`
`ldi:32 main, r0`	`ldi:32 main, r0`
`call @r0`	`call @r0`

`;; Jump to exit`	`;; Jump to exit`
`ldi:32 exit, r0`	`ldi:32 exit, r0`
`call @r0`	`call @r0`

`;; Should never reach here`	`;; Should never reach here`
`int #9`	`int #9`