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| author | Michael Brown | 2016-02-18 17:41:48 +0100 |
|---|---|---|
| committer | Michael Brown | 2016-02-18 17:41:48 +0100 |
| commit | adac4b1984721aad4cf4f78482dd9208f56d2f18 (patch) | |
| tree | 64dd9ad1441e4b3892e3bd48cf9f297b96128a62 /src/arch/x86/transitions/librm.S | |
| parent | [prefix] Use garbage-collectable section names (diff) | |
| download | ipxe-adac4b1984721aad4cf4f78482dd9208f56d2f18.tar.gz ipxe-adac4b1984721aad4cf4f78482dd9208f56d2f18.tar.xz ipxe-adac4b1984721aad4cf4f78482dd9208f56d2f18.zip | |
[librm] Simplify definitions for prot_call() and real_call() stack frames
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/arch/x86/transitions/librm.S')
| -rw-r--r-- | src/arch/x86/transitions/librm.S | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/src/arch/x86/transitions/librm.S b/src/arch/x86/transitions/librm.S index 6cbc3795..c702c0cc 100644 --- a/src/arch/x86/transitions/librm.S +++ b/src/arch/x86/transitions/librm.S @@ -390,13 +390,14 @@ rm_gdtr: * void pxe_api_call ( struct i386_all_regs *ix86 ); **************************************************************************** */ - -#define PC_OFFSET_GDT ( 0 ) -#define PC_OFFSET_IDT ( PC_OFFSET_GDT + 6 ) -#define PC_OFFSET_IX86 ( PC_OFFSET_IDT + 6 ) -#define PC_OFFSET_RETADDR ( PC_OFFSET_IX86 + SIZEOF_I386_ALL_REGS ) -#define PC_OFFSET_FUNCTION ( PC_OFFSET_RETADDR + 4 ) -#define PC_OFFSET_END ( PC_OFFSET_FUNCTION + 4 ) + .struct 0 +PC_OFFSET_GDT: .space 6 +PC_OFFSET_IDT: .space 6 +PC_OFFSET_IX86: .space SIZEOF_I386_ALL_REGS +PC_OFFSET_RETADDR: .space 4 +PC_OFFSET_FUNCTION: .space 4 +PC_OFFSET_END: + .previous .section ".text16.prot_call", "ax", @progbits .code16 @@ -478,11 +479,13 @@ pc_rmode: * Returns: none **************************************************************************** */ - -#define RC_OFFSET_PRESERVE_REGS ( 0 ) -#define RC_OFFSET_RETADDR ( RC_OFFSET_PRESERVE_REGS + SIZEOF_I386_REGS ) -#define RC_OFFSET_FUNCTION ( RC_OFFSET_RETADDR + 4 ) -#define RC_OFFSET_END ( RC_OFFSET_FUNCTION + 4 ) + .struct 0 +RC_OFFSET_REGS: .space SIZEOF_I386_REGS +RC_OFFSET_REGS_END: +RC_OFFSET_RETADDR: .space 4 +RC_OFFSET_FUNCTION: .space 4 +RC_OFFSET_END: + .previous .section ".text.real_call", "ax", @progbits .code32 @@ -493,7 +496,7 @@ real_call: pushl RC_OFFSET_FUNCTION(%esp) /* Switch to real mode and move register dump to RM stack */ - movl $( RC_OFFSET_RETADDR + 4 /* function pointer copy */ ), %ecx + movl $( RC_OFFSET_REGS_END + 4 /* function pointer copy */ ), %ecx pushl $rc_rmode movl $rm_default_gdtr_idtr, %esi jmp prot_to_real @@ -510,7 +513,7 @@ rc_rmode: cld /* Switch to protected mode and move register dump back to PM stack */ - movl $RC_OFFSET_RETADDR, %ecx + movl $RC_OFFSET_REGS_END, %ecx pushl $rc_pmode jmp real_to_prot .section ".text.real_call", "ax", @progbits |