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From 65289dab529e8aefe6ef0e365739e05a8a574e0e Mon Sep 17 00:00:00 2001
From: Natanael Copa <ncopa@alpinelinux.org>
Date: Mon, 21 Oct 2013 14:22:17 +0000
Subject: [PATCH] ipxe: dont clobber ebp
build fix
https://bugs.gentoo.org/show_bug.cgi?id=487254
---
.../etherboot/patches/no-clobber-ebp.patch | 220 +++++++++++++++++++++
.../etherboot/patches/no-clobber-ebp2.patch | 26 +++
tools/firmware/etherboot/patches/series | 2 +
3 files changed, 248 insertions(+)
create mode 100644 tools/firmware/etherboot/patches/no-clobber-ebp.patch
create mode 100644 tools/firmware/etherboot/patches/no-clobber-ebp2.patch
diff --git a/tools/firmware/etherboot/patches/no-clobber-ebp.patch b/tools/firmware/etherboot/patches/no-clobber-ebp.patch
new file mode 100644
index 0000000..bbd8c06
--- /dev/null
+++ b/tools/firmware/etherboot/patches/no-clobber-ebp.patch
@@ -0,0 +1,220 @@
+From cba22d36b77da53890bd65fdadd0e63925687af0 Mon Sep 17 00:00:00 2001
+From: Michael Brown <mcb30@ipxe.org>
+Date: Wed, 25 Sep 2013 12:55:46 +0100
+Subject: [PATCH] [build] Work around bug in gcc >= 4.8
+MIME-Version: 1.0
+Content-Type: text/plain; charset=utf8
+Content-Transfer-Encoding: 8bit
+
+Commit 238050d ("[build] Work around bug in gcc >= 4.8") works around
+one instance of a bug in recent versions of gcc, in which "ebp" cannot
+be specified within an asm clobber list.
+
+Some versions of gcc seem to exhibit the same bug on other points in
+the codebase. Fix by changing all instances of "ebp" in a clobber
+list to use the push/pop %ebp workaround instead.
+
+Originally-implemented-by: VÃctor Román Archidona <contacto@victor-roman.es>
+Signed-off-by: Michael Brown <mcb30@ipxe.org>
+---
+ src/arch/i386/drivers/net/undiload.c | 8 +++++---
+ src/arch/i386/firmware/pcbios/bios_console.c | 9 +++++----
+ src/arch/i386/image/bootsector.c | 7 ++++++-
+ src/arch/i386/image/elfboot.c | 7 ++++---
+ src/arch/i386/image/nbi.c | 16 ++++++++++------
+ src/arch/i386/interface/pxeparent/pxeparent.c | 8 +++++---
+ 6 files changed, 35 insertions(+), 20 deletions(-)
+
+diff --git a/src/arch/i386/drivers/net/undiload.c b/src/arch/i386/drivers/net/undiload.c
+index f0f15e6..77134dc 100644
+--- a/src/arch/i386/drivers/net/undiload.c
++++ b/src/arch/i386/drivers/net/undiload.c
+@@ -103,13 +103,15 @@ int undi_load ( struct undi_device *undi, struct undi_rom *undirom ) {
+
+ /* Call loader */
+ undi_loader_entry = undirom->loader_entry;
+- __asm__ __volatile__ ( REAL_CODE ( "pushw %%ds\n\t"
++ __asm__ __volatile__ ( REAL_CODE ( "pushl %%ebp\n\t" /* gcc bug */
++ "pushw %%ds\n\t"
+ "pushw %%ax\n\t"
+ "lcall *undi_loader_entry\n\t"
+- "addw $4, %%sp\n\t" )
++ "popl %%ebp\n\t" /* discard */
++ "popl %%ebp\n\t" /* gcc bug */ )
+ : "=a" ( exit )
+ : "a" ( __from_data16 ( &undi_loader ) )
+- : "ebx", "ecx", "edx", "esi", "edi", "ebp" );
++ : "ebx", "ecx", "edx", "esi", "edi" );
+
+ if ( exit != PXENV_EXIT_SUCCESS ) {
+ /* Clear entry point */
+diff --git a/src/arch/i386/firmware/pcbios/bios_console.c b/src/arch/i386/firmware/pcbios/bios_console.c
+index 213ebd9..79e4370 100644
+--- a/src/arch/i386/firmware/pcbios/bios_console.c
++++ b/src/arch/i386/firmware/pcbios/bios_console.c
+@@ -167,7 +167,8 @@ static void bios_putchar ( int character ) {
+ return;
+
+ /* Print character with attribute */
+- __asm__ __volatile__ ( REAL_CODE ( "sti\n\t"
++ __asm__ __volatile__ ( REAL_CODE ( "pushl %%ebp\n\t" /* gcc bug */
++ "sti\n\t"
+ /* Skip non-printable characters */
+ "cmpb $0x20, %%al\n\t"
+ "jb 1f\n\t"
+@@ -188,11 +189,11 @@ static void bios_putchar ( int character ) {
+ "xorw %%bx, %%bx\n\t"
+ "movb $0x0e, %%ah\n\t"
+ "int $0x10\n\t"
+- "cli\n\t" )
++ "cli\n\t"
++ "popl %%ebp\n\t" /* gcc bug */ )
+ : "=a" ( discard_a ), "=b" ( discard_b ),
+ "=c" ( discard_c )
+- : "a" ( character ), "b" ( bios_attr )
+- : "ebp" );
++ : "a" ( character ), "b" ( bios_attr ) );
+ }
+
+ /**
+diff --git a/src/arch/i386/image/bootsector.c b/src/arch/i386/image/bootsector.c
+index ab3cf94..cb164fd 100644
+--- a/src/arch/i386/image/bootsector.c
++++ b/src/arch/i386/image/bootsector.c
+@@ -80,6 +80,8 @@ int call_bootsector ( unsigned int segment, unsigned int offset,
+ "movw %%ss, %%ax\n\t"
+ "movw %%ax, %%cs:saved_ss\n\t"
+ "movw %%sp, %%cs:saved_sp\n\t"
++ /* Save frame pointer (gcc bug) */
++ "movl %%ebp, %%cs:saved_ebp\n\t"
+ /* Jump to boot sector */
+ "pushw %%bx\n\t"
+ "pushw %%di\n\t"
+@@ -99,11 +101,14 @@ int call_bootsector ( unsigned int segment, unsigned int offset,
+ "sti\n\t"
+ "lret\n\t"
+ /* Preserved variables */
++ "\nsaved_ebp: .long 0\n\t"
+ "\nsaved_ss: .word 0\n\t"
+ "\nsaved_sp: .word 0\n\t"
+ "\nsaved_retaddr: .word 0\n\t"
+ /* Boot failure return point */
+ "\nbootsector_exec_fail:\n\t"
++ /* Restore frame pointer (gcc bug) */
++ "movl %%cs:saved_ebp, %%ebp\n\t"
+ /* Restore stack pointer */
+ "movw %%cs:saved_ss, %%ax\n\t"
+ "movw %%ax, %%ss\n\t"
+@@ -114,7 +119,7 @@ int call_bootsector ( unsigned int segment, unsigned int offset,
+ "=d" ( discard_d )
+ : "b" ( segment ), "D" ( offset ),
+ "d" ( drive )
+- : "eax", "ecx", "esi", "ebp" );
++ : "eax", "ecx", "esi" );
+
+ DBG ( "Booted disk returned via INT 18 or 19\n" );
+
+diff --git a/src/arch/i386/image/elfboot.c b/src/arch/i386/image/elfboot.c
+index a867a95..0f6957f 100644
+--- a/src/arch/i386/image/elfboot.c
++++ b/src/arch/i386/image/elfboot.c
+@@ -60,10 +60,11 @@ static int elfboot_exec ( struct image *image ) {
+
+ /* Jump to OS with flat physical addressing */
+ DBGC ( image, "ELF %p starting execution at %lx\n", image, entry );
+- __asm__ __volatile__ ( PHYS_CODE ( "call *%%edi\n\t" )
++ __asm__ __volatile__ ( PHYS_CODE ( "pushl %%ebp\n\t" /* gcc bug */
++ "call *%%edi\n\t"
++ "popl %%ebp\n\t" /* gcc bug */ )
+ : : "D" ( entry )
+- : "eax", "ebx", "ecx", "edx", "esi", "ebp",
+- "memory" );
++ : "eax", "ebx", "ecx", "edx", "esi", "memory" );
+
+ DBGC ( image, "ELF %p returned\n", image );
+
+diff --git a/src/arch/i386/image/nbi.c b/src/arch/i386/image/nbi.c
+index d3e523e..9904614 100644
+--- a/src/arch/i386/image/nbi.c
++++ b/src/arch/i386/image/nbi.c
+@@ -248,7 +248,8 @@ static int nbi_boot16 ( struct image *image, struct imgheader *imgheader ) {
+ imgheader->execaddr.segoff.offset );
+
+ __asm__ __volatile__ (
+- REAL_CODE ( "pushw %%ds\n\t" /* far pointer to bootp data */
++ REAL_CODE ( "pushl %%ebp\n\t" /* gcc bug */
++ "pushw %%ds\n\t" /* far pointer to bootp data */
+ "pushw %%bx\n\t"
+ "pushl %%esi\n\t" /* location */
+ "pushw %%cs\n\t" /* lcall execaddr */
+@@ -258,13 +259,14 @@ static int nbi_boot16 ( struct image *image, struct imgheader *imgheader ) {
+ "pushl %%edi\n\t"
+ "lret\n\t"
+ "\n2:\n\t"
+- "addw $8,%%sp\n\t" /* clean up stack */ )
++ "addw $8,%%sp\n\t" /* clean up stack */
++ "popl %%ebp\n\t" /* gcc bug */ )
+ : "=a" ( rc ), "=D" ( discard_D ), "=S" ( discard_S ),
+ "=b" ( discard_b )
+ : "D" ( imgheader->execaddr.segoff ),
+ "S" ( imgheader->location ),
+ "b" ( __from_data16 ( basemem_packet ) )
+- : "ecx", "edx", "ebp" );
++ : "ecx", "edx" );
+
+ return rc;
+ }
+@@ -288,11 +290,13 @@ static int nbi_boot32 ( struct image *image, struct imgheader *imgheader ) {
+
+ /* Jump to OS with flat physical addressing */
+ __asm__ __volatile__ (
+- PHYS_CODE ( "pushl %%ebx\n\t" /* bootp data */
++ PHYS_CODE ( "pushl %%ebp\n\t" /* gcc bug */
++ "pushl %%ebx\n\t" /* bootp data */
+ "pushl %%esi\n\t" /* imgheader */
+ "pushl %%eax\n\t" /* loaderinfo */
+ "call *%%edi\n\t"
+- "addl $12, %%esp\n\t" /* clean up stack */ )
++ "addl $12, %%esp\n\t" /* clean up stack */
++ "popl %%ebp\n\t" /* gcc bug */ )
+ : "=a" ( rc ), "=D" ( discard_D ), "=S" ( discard_S ),
+ "=b" ( discard_b )
+ : "D" ( imgheader->execaddr.linear ),
+@@ -300,7 +304,7 @@ static int nbi_boot32 ( struct image *image, struct imgheader *imgheader ) {
+ imgheader->location.offset ),
+ "b" ( virt_to_phys ( basemem_packet ) ),
+ "a" ( virt_to_phys ( &loaderinfo ) )
+- : "ecx", "edx", "ebp", "memory" );
++ : "ecx", "edx", "memory" );
+
+ return rc;
+ }
+diff --git a/src/arch/i386/interface/pxeparent/pxeparent.c b/src/arch/i386/interface/pxeparent/pxeparent.c
+index b2c6ffb..9d2948c 100644
+--- a/src/arch/i386/interface/pxeparent/pxeparent.c
++++ b/src/arch/i386/interface/pxeparent/pxeparent.c
+@@ -143,16 +143,18 @@ int pxeparent_call ( SEGOFF16_t entry, unsigned int function,
+ /* Call real-mode entry point. This calling convention will
+ * work with both the !PXE and the PXENV+ entry points.
+ */
+- __asm__ __volatile__ ( REAL_CODE ( "pushw %%es\n\t"
++ __asm__ __volatile__ ( REAL_CODE ( "pushl %%ebp\n\t" /* gcc bug */
++ "pushw %%es\n\t"
+ "pushw %%di\n\t"
+ "pushw %%bx\n\t"
+ "lcall *pxeparent_entry_point\n\t"
+- "addw $6, %%sp\n\t" )
++ "addw $6, %%sp\n\t"
++ "popl %%ebp\n\t" /* gcc bug */ )
+ : "=a" ( exit ), "=b" ( discard_b ),
+ "=D" ( discard_D )
+ : "b" ( function ),
+ "D" ( __from_data16 ( &pxeparent_params ) )
+- : "ecx", "edx", "esi", "ebp" );
++ : "ecx", "edx", "esi" );
+
+ /* Determine return status code based on PXENV_EXIT and
+ * PXENV_STATUS
+--
+1.7.9
+
diff --git a/tools/firmware/etherboot/patches/no-clobber-ebp2.patch b/tools/firmware/etherboot/patches/no-clobber-ebp2.patch
new file mode 100644
index 0000000..6b9ac07
--- /dev/null
+++ b/tools/firmware/etherboot/patches/no-clobber-ebp2.patch
@@ -0,0 +1,26 @@
+--- a/src/arch/i386/interface/pxe/pxe_call.c.orig
++++ b/src/arch/i386/interface/pxe/pxe_call.c
+@@ -265,11 +265,13 @@
+
+ /* Far call to PXE NBP */
+ __asm__ __volatile__ ( REAL_CODE ( "movw %%cx, %%es\n\t"
++ "pushl %%ebp\n\t" /* gcc bug */
+ "pushw %%es\n\t"
+ "pushw %%di\n\t"
+ "sti\n\t"
+ "lcall $0, $0x7c00\n\t"
+- "addw $4, %%sp\n\t" )
++ "addw $4, %%sp\n\t"
++ "popl %%ebp\n\t" ) /* gcc bug */
+ : "=a" ( rc ), "=b" ( discard_b ),
+ "=c" ( discard_c ), "=d" ( discard_d ),
+ "=D" ( discard_D )
+@@ -277,7 +279,7 @@
+ "c" ( rm_cs ),
+ "d" ( virt_to_phys ( &pxenv ) ),
+ "D" ( __from_text16 ( &ppxe ) )
+- : "esi", "ebp", "memory" );
++ : "esi", "memory" );
+
+ return rc;
+ }
diff --git a/tools/firmware/etherboot/patches/series b/tools/firmware/etherboot/patches/series
index 5bd7df8..154e65b 100644
--- a/tools/firmware/etherboot/patches/series
+++ b/tools/firmware/etherboot/patches/series
@@ -4,3 +4,5 @@
build_fix_3.patch
build-compare.patch
build_fix_4.patch
+no-clobber-ebp.patch
+no-clobber-ebp2.patch
--
1.8.4.1
|
